kernel/bpf/verifier.c in the Linux kernel through 4.14.8 ignores unreachable code, even though it would still be processed by JIT compilers. This behavior, also considered an improper branch-pruning logic issue, could possibly be used by local users for denial of service.

The remote SUSE Linux SLES12 / SLES_SAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:3935-1 advisory.

  - kernel/bpf/verifier.c in the Linux kernel through 4.14.8 ignores unreachable code, even though it would     still be processed by JIT compilers. This behavior, also considered an improper branch-pruning logic     issue, could possibly be used by local users for denial of service. (CVE-2017-17862)

  - kernel/bpf/verifier.c in the Linux kernel through 4.14.8 mishandles states_equal comparisons between the     pointer data type and the UNKNOWN_VALUE data type, which allows local users to obtain potentially     sensitive address information, aka a pointer leak. (CVE-2017-17864)

  - The inode_init_owner function in fs/inode.c in the Linux kernel through 3.16 allows local users to create     files with an unintended group ownership, in a scenario where a directory is SGID to a certain group and     is writable by a user who is not a member of that group. Here, the non-member can trigger creation of a     plain file whose group ownership is that group. The intended behavior was that the non-member can trigger     creation of a directory (but not a plain file) whose group ownership is that group. The non-member can     escalate privileges by making the plain file executable and SGID. (CVE-2018-13405)

  - A use-after-free issue was found in the way the Linux kernel's KVM hypervisor processed posted interrupts     when nested(=1) virtualization is enabled. In nested_get_vmcs12_pages(), in case of an error while     processing posted interrupt address, it unmaps the 'pi_desc_page' without resetting 'pi_desc' descriptor     address, which is later used in pi_test_and_clear_on(). A guest user/process could use this flaw to crash     the host kernel resulting in DoS or potentially gain privileged access to a system. Kernel versions before     4.14.91 and before 4.19.13 are vulnerable. (CVE-2018-16882)

  - In l2tp_session_delete and related functions of l2tp_core.c, there is possible memory corruption due to a     use after free. This could lead to local escalation of privilege with System execution privileges needed.
    User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID:
    A-152735806 (CVE-2020-0429)

  - An issue was discovered in xfs_agf_verify in fs/xfs/libxfs/xfs_alloc.c in the Linux kernel through 5.6.10.
    Attackers may trigger a sync of excessive duration via an XFS v5 image with crafted metadata, aka     CID-d0c7feaf8767. (CVE-2020-12655)

  - An out-of-bounds memory write flaw was found in how the Linux kernel's Voice Over IP H.323 connection     tracking functionality handled connections on ipv6 port 1720. This flaw allows an unauthenticated remote     user to crash the system, causing a denial of service. The highest threat from this vulnerability is to     confidentiality, integrity, as well as system availability. (CVE-2020-14305)

  - u'Specifically timed and handcrafted traffic can cause internal errors in a WLAN device that lead to     improper layer 2 Wi-Fi encryption with a consequent possibility of information disclosure over the air for     a discrete set of traffic' in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon     Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon     Wearables, Snapdragon Wired Infrastructure and Networking in APQ8053, IPQ4019, IPQ8064, MSM8909W,     MSM8996AU, QCA9531, QCN5502, QCS405, SDX20, SM6150, SM7150 (CVE-2020-3702)

  - IBM Power9 (AIX 7.1, 7.2, and VIOS 3.1) processors could allow a local user to obtain sensitive     information from the data in the L1 cache under extenuating circumstances. IBM X-Force ID: 189296.
    (CVE-2020-4788)

  - A flaw was found in the way memory resources were freed in the unix_stream_recvmsg function in the Linux     kernel when a signal was pending. This flaw allows an unprivileged local user to crash the system by     exhausting available memory. The highest threat from this vulnerability is to system availability.
    (CVE-2021-20265)

  - A flaw in the processing of received ICMP errors (ICMP fragment needed and ICMP redirect) in the Linux     kernel functionality was found to allow the ability to quickly scan open UDP ports. This flaw allows an     off-path remote user to effectively bypass the source port UDP randomization. The highest threat from this     vulnerability is to confidentiality and possibly integrity, because software that relies on UDP source     port randomization are indirectly affected as well. (CVE-2021-20322)

  - An out-of-bounds (OOB) memory write flaw was found in list_devices in drivers/md/dm-ioctl.c in the Multi-     device driver module in the Linux kernel before 5.12. A bound check failure allows an attacker with     special user (CAP_SYS_ADMIN) privilege to gain access to out-of-bounds memory leading to a system crash or     a leak of internal kernel information. The highest threat from this vulnerability is to system     availability. (CVE-2021-31916)

  - The Linux kernel before 5.11.14 has a use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c because     the CIPSO and CALIPSO refcounting for the DOI definitions is mishandled, aka CID-ad5d07f4a9cd. This leads     to writing an arbitrary value. (CVE-2021-33033)

  - In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from     kernel memory via a Speculative Store Bypass side-channel attack because the protection mechanism neglects     the possibility of uninitialized memory locations on the BPF stack. (CVE-2021-34556)

  - A flaw was found in the Linux kernel's CAPI over Bluetooth connection code. An attacker with a local     account can escalate privileges when CAPI (ISDN) hardware connection fails. (CVE-2021-34981)

  - In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from     kernel memory via a Speculative Store Bypass side-channel attack because a certain preempting store     operation does not necessarily occur before a store operation that has an attacker-controlled value.
    (CVE-2021-35477)

  - A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the     way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del()     together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. A     privileged local user could use this flaw to crash the system or escalate their privileges on the system.
    (CVE-2021-3640)

  - A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when     processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested     guest (L2). Due to improper validation of the int_ctl field, this issue could allow a malicious L1 to     enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. As a result, the L2 guest     would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak     of sensitive data or potential guest-to-host escape. This flaw affects Linux kernel versions prior to     5.14-rc7. (CVE-2021-3653)

  - A vulnerability was found in the Linux kernel in versions prior to v5.14-rc1. Missing size validations on     inbound SCTP packets may allow the kernel to read uninitialized memory. (CVE-2021-3655)

  - A NULL pointer dereference flaw was found in the Linux kernel's IEEE 802.15.4 wireless networking     subsystem in the way the user closes the LR-WPAN connection. This flaw allows a local user to crash the     system. The highest threat from this vulnerability is to system availability. (CVE-2021-3659)

  - A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was     found in the way user uses trace ring buffer in a specific way. Only privileged local users (with     CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
    (CVE-2021-3679)

  - A flaw was found in the Routing decision classifier in the Linux kernel's Traffic Control networking     subsystem in the way it handled changing of classification filters, leading to a use-after-free condition.
    This flaw allows unprivileged local users to escalate their privileges on the system. The highest threat     from this vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2021-3715)

  - hso_free_net_device in drivers/net/usb/hso.c in the Linux kernel through 5.13.4 calls unregister_netdev     without checking for the NETREG_REGISTERED state, leading to a use-after-free and a double free.
    (CVE-2021-37159)

  - A flaw was found in the Linux kernel's OverlayFS subsystem in the way the user mounts the TmpFS filesystem     with OverlayFS. This flaw allows a local user to gain access to hidden files that should not be     accessible. (CVE-2021-3732)

  - A use-after-free flaw was found in the Linux kernel's Bluetooth subsystem in the way user calls connect to     the socket and disconnect simultaneously due to a race condition. This flaw allows a user to crash the     system or escalate their privileges. The highest threat from this vulnerability is to confidentiality,     integrity, as well as system availability. (CVE-2021-3752)

  - A race problem was seen in the vt_k_ioctl in drivers/tty/vt/vt_ioctl.c in the Linux kernel, which may     cause an out of bounds read in vt as the write access to vc_mode is not protected by lock-in vt_ioctl     (KDSETMDE). The highest threat from this vulnerability is to data confidentiality. (CVE-2021-3753)

  - arch/powerpc/kvm/book3s_rtas.c in the Linux kernel through 5.13.5 on the powerpc platform allows KVM guest     OS users to cause host OS memory corruption via rtas_args.nargs, aka CID-f62f3c20647e. (CVE-2021-37576)

  - A flaw was found in the Linux kernel. A use-after-free vulnerability in the NFC stack can lead to a threat     to confidentiality, integrity, and system availability. (CVE-2021-3760)

  - A flaw was found in the Linux SCTP stack. A blind attacker may be able to kill an existing SCTP     association through invalid chunks if the attacker knows the IP-addresses and port numbers being used and     the attacker can send packets with spoofed IP addresses. (CVE-2021-3772)

  - ** DISPUTED ** In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss     can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size. NOTE:
    the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the     length validation was added solely for robustness in the face of anomalous host OS behavior.
    (CVE-2021-38160)

  - arch/x86/kvm/mmu/paging_tmpl.h in the Linux kernel before 5.12.11 incorrectly computes the access     permissions of a shadow page, leading to a missing guest protection page fault. (CVE-2021-38198)

  - drivers/usb/host/max3421-hcd.c in the Linux kernel before 5.13.6 allows physically proximate attackers to     cause a denial of service (use-after-free and panic) by removing a MAX-3421 USB device in certain     situations. (CVE-2021-38204)

  - A race condition was discovered in ext4_write_inline_data_end in fs/ext4/inline.c in the ext4 subsystem in     the Linux kernel through 5.13.13. (CVE-2021-40490)

  - The decode_data function in drivers/net/hamradio/6pack.c in the Linux kernel before 5.13.13 has a slab     out-of-bounds write. Input from a process that has the CAP_NET_ADMIN capability can lead to root access.
    (CVE-2021-42008)

  - A heap-based buffer overflow flaw was found in the Linux kernel FireDTV media card driver, where the user     calls the CA_SEND_MSG ioctl. This flaw allows a local user of the host machine to crash the system or     escalate privileges on the system. The highest threat from this vulnerability is to confidentiality,     integrity, as well as system availability. (CVE-2021-42739)

  - An issue was discovered in the Linux kernel before 5.14.15. There is an array-index-out-of-bounds flaw in     the detach_capi_ctr function in drivers/isdn/capi/kcapi.c. (CVE-2021-43389)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the kernel packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - The hi3660_stub_clk_probe function in     drivers/clk/hisilicon/clk-hi3660-stub.c in the Linux     kernel before 4.16 allows local users to cause a denial     of service (NULL pointer dereference) by triggering a     failure of resource retrieval.(CVE-2018-10074i1/4%0

  - An information leak flaw was found in the RAM Disks     Memory Copy (rd_mcp) backend driver of the iSCSI Target     subsystem of the Linux kernel. A privileged user could     use this flaw to leak the contents of kernel memory to     an iSCSI initiator remote client.(CVE-2014-4027i1/4%0

  - It was found that in the Linux kernel version 4.2-rc1     to 4.3-rc1, a use of uninitialized 'n_proto',     'ip_proto', and 'thoff' variables in
    __skb_flow_dissect() function can lead to a remote     denial-of-service via malformed MPLS     packet.(CVE-2017-13715i1/4%0

  - It was found that the packet_set_ring() function of the     Linux kernel's networking implementation did not     properly validate certain block-size data. A local     attacker with CAP_NET_RAW capability could use this     flaw to trigger a buffer overflow, resulting in the     crash of the system. Due to the nature of the flaw,     privilege escalation cannot be fully ruled     out.(CVE-2017-7308i1/4%0

  - A weakness was found in the Linux ASLR implementation.
    Any user able to running 32-bit applications in a x86     machine can disable ASLR by setting the RLIMIT_STACK     resource to unlimited.(CVE-2016-3672i1/4%0

  - sound/soc/msm/qdsp6v2/msm-audio-effects-q6-v2.c in the     MSM QDSP6 audio driver for the Linux kernel 3.x, as     used in Qualcomm Innovation Center (QuIC) Android     contributions for MSM devices and other products,     allows attackers to cause a denial of service     (out-of-bounds write and memory corruption) or possibly     have unspecified other impact via a crafted application     that makes an ioctl call triggering incorrect use of a     parameters pointer.(CVE-2016-2065i1/4%0

  - A race condition flaw was found in the ioctl_send_fib()     function in the Linux kernel's aacraid implementation.
    A local attacker could use this flaw to cause a denial     of service (out-of-bounds access or system crash) by     changing a certain size value.(CVE-2016-6480i1/4%0

  - The omninet_open function in     drivers/usb/serial/omninet.c in the Linux kernel before     4.10.4 allows local users to cause a denial of service     (tty exhaustion) by leveraging reference count     mishandling.(CVE-2017-8925i1/4%0

  - The tower_probe function in     drivers/usb/misc/legousbtower.c in the Linux kernel     before 4.8.1 allows local users (who are physically     proximate for inserting a crafted USB device) to gain     privileges by leveraging a write-what-where condition     that occurs after a race condition and a NULL pointer     dereference.(CVE-2017-15102i1/4%0

  - The rtnl_fill_link_ifmap function in     net/core/rtnetlink.c in the Linux kernel before 4.5.5     does not initialize a certain data structure, which     allows local users to obtain sensitive information from     kernel stack memory by reading a Netlink     message.(CVE-2016-4486i1/4%0

  - A vulnerability was found in the Linux kernel's     lp_setup() function where it doesn't apply any bounds     checking when passing 'lp=none'. This can result into     overflow of the parport_nr array. An attacker with     control over kernel command line can overwrite kernel     code and data with fixed (0xff)     values.(CVE-2017-1000363i1/4%0

  - sound/core/hrtimer.c in the Linux kernel before 4.4.1     does not prevent recursive callback access, which     allows local users to cause a denial of service     (deadlock) via a crafted ioctl call.(CVE-2016-2549i1/4%0

  - The pn_recvmsg function in net/phonet/datagram.c in the     Linux kernel before 3.12.4 updates a certain length     value before ensuring that an associated data structure     has been initialized, which allows local users to     obtain sensitive information from kernel stack memory     via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system     call.(CVE-2013-7265i1/4%0

  - A NULL pointer dereference flaw was found in the SCTP     implementation. A local user could use this flaw to     cause a denial of service on the system by triggering a     kernel panic when creating multiple sockets in parallel     while the system did not have the SCTP module     loaded.(CVE-2015-5283i1/4%0

  - It was found that in Linux kernel the mount table     expands by a power-of-two with each bind mount command.
    If a system is configured to allow non-privileged user     to do bind mounts, or allows to do so in a container or     unprivileged mount namespace, then non-privileged user     is able to cause a local DoS by overflowing the mount     table, which causes a deadlock for the whole     system.(CVE-2016-6213i1/4%0

  - The cifs_iovec_write function in fs/cifs/file.c in the     Linux kernel through 3.13.5 does not properly handle     uncached write operations that copy fewer than the     requested number of bytes, which allows local users to     obtain sensitive information from kernel memory, cause     a denial of service (memory corruption and system     crash), or possibly gain privileges via a writev system     call with a crafted pointer.(CVE-2014-0069i1/4%0

  - A flaw was found in the Linux kernel's implementation     of XFS file attributes. Two memory leaks were detected     in xfs_attr_shortform_list and xfs_attr3_leaf_list_int     when running a docker container backed by xfs/overlay2.
    A dedicated attacker could possible exhaust all memory     and create a denial of service     situation.(CVE-2016-9685i1/4%0

  - Multiple integer overflows in the MDSS driver for the     Linux kernel 3.x, as used in Qualcomm Innovation Center     (QuIC) Android contributions for MSM devices and other     products, allow attackers to cause a denial of service     or possibly have unspecified other impact via a large     size value, related to mdss_compat_utils.c, mdss_fb.c,     and mdss_rotator.c.(CVE-2016-5344i1/4%0

  - kernel/bpf/verifier.c in the Linux kernel through     4.14.8 ignores unreachable code, even though it would     still be processed by JIT compilers. This behavior,     also considered an improper branch-pruning logic issue,     could possibly be used by local users for denial of     service.(CVE-2017-17862i1/4%0

  - A flaw was found in the Linux kernel's implementation     of the SCTP protocol. A remote attacker could trigger     an out-of-bounds read with an offset of up to 64kB     potentially causing the system to     crash.(CVE-2016-9555i1/4%0

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3619-2 advisory.

  - Use-after-free vulnerability in the snd_pcm_info function in the ALSA subsystem in the Linux kernel allows     attackers to gain privileges via unspecified vectors. (CVE-2017-0861)

  - The Linux Kernel 2.6.32 and later are affected by a denial of service, by flooding the diagnostic port     0x80 an exception can be triggered leading to a kernel panic. (CVE-2017-1000407)

  - The acpi_ns_terminate() function in drivers/acpi/acpica/nsutils.c in the Linux kernel before 4.12 does not     flush the operand cache and causes a kernel stack dump, which allows local users to obtain sensitive     information from kernel memory and bypass the KASLR protection mechanism (in the kernel through 4.9) via a     crafted ACPI table. (CVE-2017-11472)

  - A use-after-free vulnerability was found in network namespaces code affecting the Linux kernel before     4.14.11. The function get_net_ns_by_id() in net/core/net_namespace.c does not check for the net::count     value after it has found a peer network in netns_ids idr, which could lead to double free and memory     corruption. This vulnerability could allow an unprivileged local user to induce kernel memory corruption     on the system, leading to a crash. Due to the nature of the flaw, privilege escalation cannot be fully     ruled out, although it is thought to be unlikely. (CVE-2017-15129)

  - sound/core/seq_device.c in the Linux kernel before 4.13.4 allows local users to cause a denial of service     (snd_rawmidi_dev_seq_free use-after-free and system crash) or possibly have unspecified other impact via a     crafted USB device. (CVE-2017-16528)

  - The get_endpoints function in drivers/usb/misc/usbtest.c in the Linux kernel through 4.13.11 allows local     users to cause a denial of service (NULL pointer dereference and system crash) or possibly have     unspecified other impact via a crafted USB device. (CVE-2017-16532)

  - The cx231xx_usb_probe function in drivers/media/usb/cx231xx/cx231xx-cards.c in the Linux kernel through     4.13.11 allows local users to cause a denial of service (NULL pointer dereference and system crash) or     possibly have unspecified other impact via a crafted USB device. (CVE-2017-16536)

  - The imon_probe function in drivers/media/rc/imon.c in the Linux kernel through 4.13.11 allows local users     to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified     other impact via a crafted USB device. (CVE-2017-16537)

  - The ims_pcu_get_cdc_union_desc function in drivers/input/misc/ims-pcu.c in the Linux kernel through     4.13.11 allows local users to cause a denial of service (ims_pcu_parse_cdc_data out-of-bounds read and     system crash) or possibly have unspecified other impact via a crafted USB device. (CVE-2017-16645)

  - drivers/media/usb/dvb-usb/dib0700_devices.c in the Linux kernel through 4.13.11 allows local users to     cause a denial of service (BUG and system crash) or possibly have unspecified other impact via a crafted     USB device. (CVE-2017-16646)

  - The usbnet_generic_cdc_bind function in drivers/net/usb/cdc_ether.c in the Linux kernel through 4.13.11     allows local users to cause a denial of service (divide-by-zero error and system crash) or possibly have     unspecified other impact via a crafted USB device. (CVE-2017-16649)

  - The qmi_wwan_bind function in drivers/net/usb/qmi_wwan.c in the Linux kernel through 4.13.11 allows local     users to cause a denial of service (divide-by-zero error and system crash) or possibly have unspecified     other impact via a crafted USB device. (CVE-2017-16650)

  - The vhci_hcd driver in the Linux Kernel before version 4.14.8 and 4.4.114 allows allows local attackers to     disclose kernel memory addresses. Successful exploitation requires that a USB device is attached over IP.
    (CVE-2017-16911)

  - The get_pipe() function (drivers/usb/usbip/stub_rx.c) in the Linux Kernel before version 4.14.8, 4.9.71,     and 4.4.114 allows attackers to cause a denial of service (out-of-bounds read) via a specially crafted USB     over IP packet. (CVE-2017-16912)

  - The stub_recv_cmd_submit() function (drivers/usb/usbip/stub_rx.c) in the Linux Kernel before version     4.14.8, 4.9.71, and 4.4.114 when handling CMD_SUBMIT packets allows attackers to cause a denial of service     (arbitrary memory allocation) via a specially crafted USB over IP packet. (CVE-2017-16913)

  - The stub_send_ret_submit() function (drivers/usb/usbip/stub_tx.c) in the Linux Kernel before version     4.14.8, 4.9.71, 4.1.49, and 4.4.107 allows attackers to cause a denial of service (NULL pointer     dereference) via a specially crafted USB over IP packet. (CVE-2017-16914)

  - The walk_hugetlb_range function in mm/pagewalk.c in the Linux kernel before 4.14.2 mishandles holes in     hugetlb ranges, which allows local users to obtain sensitive information from uninitialized kernel memory     via crafted use of the mincore() system call. (CVE-2017-16994)

  - The check_alu_op function in kernel/bpf/verifier.c in the Linux kernel through 4.4 allows local users to     cause a denial of service (memory corruption) or possibly have unspecified other impact by leveraging     incorrect sign extension. (CVE-2017-16995)

  - net/netfilter/nfnetlink_cthelper.c in the Linux kernel through 4.14.4 does not require the CAP_NET_ADMIN     capability for new, get, and del operations, which allows local users to bypass intended access     restrictions because the nfnl_cthelper_list data structure is shared across all net namespaces.
    (CVE-2017-17448)

  - The __netlink_deliver_tap_skb function in net/netlink/af_netlink.c in the Linux kernel through 4.14.4,     when CONFIG_NLMON is enabled, does not restrict observations of Netlink messages to a single net     namespace, which allows local users to obtain sensitive information by leveraging the CAP_NET_ADMIN     capability to sniff an nlmon interface for all Netlink activity on the system. (CVE-2017-17449)

  - net/netfilter/xt_osf.c in the Linux kernel through 4.14.4 does not require the CAP_NET_ADMIN capability     for add_callback and remove_callback operations, which allows local users to bypass intended access     restrictions because the xt_osf_fingers data structure is shared across all net namespaces.
    (CVE-2017-17450)

  - The usb_destroy_configuration function in drivers/usb/core/config.c in the USB core subsystem in the Linux     kernel through 4.14.5 does not consider the maximum number of configurations and interfaces before     attempting to release resources, which allows local users to cause a denial of service (out-of-bounds     write access) or possibly have unspecified other impact via a crafted USB device. (CVE-2017-17558)

  - The KVM implementation in the Linux kernel through 4.14.7 allows attackers to obtain potentially sensitive     information from kernel memory, aka a write_mmio stack-based out-of-bounds read, related to     arch/x86/kvm/x86.c and include/trace/events/kvm.h. (CVE-2017-17741)

  - The Salsa20 encryption algorithm in the Linux kernel before 4.14.8 does not correctly handle zero-length     inputs, allowing a local attacker able to use the AF_ALG-based skcipher interface     (CONFIG_CRYPTO_USER_API_SKCIPHER) to cause a denial of service (uninitialized-memory free and kernel     crash) or have unspecified other impact by executing a crafted sequence of system calls that use the     blkcipher_walk API. Both the generic implementation (crypto/salsa20_generic.c) and x86 implementation     (arch/x86/crypto/salsa20_glue.c) of Salsa20 were vulnerable. (CVE-2017-17805)

  - The HMAC implementation (crypto/hmac.c) in the Linux kernel before 4.14.8 does not validate that the     underlying cryptographic hash algorithm is unkeyed, allowing a local attacker able to use the AF_ALG-based     hash interface (CONFIG_CRYPTO_USER_API_HASH) and the SHA-3 hash algorithm (CONFIG_CRYPTO_SHA3) to cause a     kernel stack buffer overflow by executing a crafted sequence of system calls that encounter a missing     SHA-3 initialization. (CVE-2017-17806)

  - The KEYS subsystem in the Linux kernel before 4.14.6 omitted an access-control check when adding a key to     the current task's default request-key keyring via the request_key() system call, allowing a local user     to use a sequence of crafted system calls to add keys to a keyring with only Search permission (not Write     permission) to that keyring, related to construct_get_dest_keyring() in security/keys/request_key.c.
    (CVE-2017-17807)

  - kernel/bpf/verifier.c in the Linux kernel through 4.14.8 ignores unreachable code, even though it would     still be processed by JIT compilers. This behavior, also considered an improper branch-pruning logic     issue, could possibly be used by local users for denial of service. (CVE-2017-17862)

  - crypto/pcrypt.c in the Linux kernel before 4.14.13 mishandles freeing instances, allowing a local user     able to access the AF_ALG-based AEAD interface (CONFIG_CRYPTO_USER_API_AEAD) and pcrypt     (CONFIG_CRYPTO_PCRYPT) to cause a denial of service (kfree of an incorrect pointer) or possibly have     unspecified other impact by executing a crafted sequence of system calls. (CVE-2017-18075)

  - The dm_get_from_kobject function in drivers/md/dm.c in the Linux kernel before 4.14.3 allow local users to     cause a denial of service (BUG) by leveraging a race condition with __dm_destroy during creation and     removal of DM devices. (CVE-2017-18203)

  - The ocfs2_setattr function in fs/ocfs2/file.c in the Linux kernel before 4.14.2 allows local users to     cause a denial of service (deadlock) via DIO requests. (CVE-2017-18204)

  - The madvise_willneed function in mm/madvise.c in the Linux kernel before 4.14.4 allows local users to     cause a denial of service (infinite loop) by triggering use of MADVISE_WILLNEED for a DAX mapping.
    (CVE-2017-18208)

  - A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap     flag(TF) bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exception(#DB)     being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate     their privileges inside the guest. Linux guests are not affected by this. (CVE-2017-7518)

  - Linux Linux kernel version at least v4.8 onwards, probably well before contains a Insufficient input     validation vulnerability in bnx2x network card driver that can result in DoS: Network card firmware     assertion takes card off-line. This attack appear to be exploitable via An attacker on a must pass a very     large, specially crafted packet to the bnx2x card. This can be done from an untrusted guest VM..
    (CVE-2018-1000026)

  - In the Linux kernel through 3.2, the rds_message_alloc_sgs() function does not validate a value that is     used during DMA page allocation, leading to a heap-based out-of-bounds write (related to the     rds_rdma_extra_size function in net/rds/rdma.c). (CVE-2018-5332)

  - In the Linux kernel through 4.14.13, the rds_cmsg_atomic function in net/rds/rdma.c mishandles cases where     page pinning fails or an invalid address is supplied, leading to an rds_atomic_free_op NULL pointer     dereference. (CVE-2018-5333)

  - In the Linux kernel through 4.14.13, drivers/block/loop.c mishandles lo_release serialization, which     allows attackers to cause a denial of service (__lock_acquire use-after-free) or possibly have unspecified     other impact. (CVE-2018-5344)

  - The futex_requeue function in kernel/futex.c in the Linux kernel before 4.14.15 might allow attackers to     cause a denial of service (integer overflow) or possibly have unspecified other impact by triggering a     negative wake or requeue value. (CVE-2018-6927)

  - A NULL pointer dereference was found in the net/rds/rdma.c __rds_rdma_map() function in the Linux kernel     before 4.14.7 allowing local attackers to cause a system panic and a denial-of-service, related to     RDS_GET_MR and RDS_GET_MR_FOR_DEST. (CVE-2018-7492)

  - The unimac_mdio_probe function in drivers/net/phy/mdio-bcm-unimac.c in the Linux kernel through 4.15.8     does not validate certain resource availability, which allows local users to cause a denial of service     (NULL pointer dereference). (CVE-2018-8043)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3619-1 advisory.

  - Use-after-free vulnerability in the snd_pcm_info function in the ALSA subsystem in the Linux kernel allows     attackers to gain privileges via unspecified vectors. (CVE-2017-0861)

  - The Linux Kernel 2.6.32 and later are affected by a denial of service, by flooding the diagnostic port     0x80 an exception can be triggered leading to a kernel panic. (CVE-2017-1000407)

  - The acpi_ns_terminate() function in drivers/acpi/acpica/nsutils.c in the Linux kernel before 4.12 does not     flush the operand cache and causes a kernel stack dump, which allows local users to obtain sensitive     information from kernel memory and bypass the KASLR protection mechanism (in the kernel through 4.9) via a     crafted ACPI table. (CVE-2017-11472)

  - A use-after-free vulnerability was found in network namespaces code affecting the Linux kernel before     4.14.11. The function get_net_ns_by_id() in net/core/net_namespace.c does not check for the net::count     value after it has found a peer network in netns_ids idr, which could lead to double free and memory     corruption. This vulnerability could allow an unprivileged local user to induce kernel memory corruption     on the system, leading to a crash. Due to the nature of the flaw, privilege escalation cannot be fully     ruled out, although it is thought to be unlikely. (CVE-2017-15129)

  - sound/core/seq_device.c in the Linux kernel before 4.13.4 allows local users to cause a denial of service     (snd_rawmidi_dev_seq_free use-after-free and system crash) or possibly have unspecified other impact via a     crafted USB device. (CVE-2017-16528)

  - The get_endpoints function in drivers/usb/misc/usbtest.c in the Linux kernel through 4.13.11 allows local     users to cause a denial of service (NULL pointer dereference and system crash) or possibly have     unspecified other impact via a crafted USB device. (CVE-2017-16532)

  - The cx231xx_usb_probe function in drivers/media/usb/cx231xx/cx231xx-cards.c in the Linux kernel through     4.13.11 allows local users to cause a denial of service (NULL pointer dereference and system crash) or     possibly have unspecified other impact via a crafted USB device. (CVE-2017-16536)

  - The imon_probe function in drivers/media/rc/imon.c in the Linux kernel through 4.13.11 allows local users     to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified     other impact via a crafted USB device. (CVE-2017-16537)

  - The ims_pcu_get_cdc_union_desc function in drivers/input/misc/ims-pcu.c in the Linux kernel through     4.13.11 allows local users to cause a denial of service (ims_pcu_parse_cdc_data out-of-bounds read and     system crash) or possibly have unspecified other impact via a crafted USB device. (CVE-2017-16645)

  - drivers/media/usb/dvb-usb/dib0700_devices.c in the Linux kernel through 4.13.11 allows local users to     cause a denial of service (BUG and system crash) or possibly have unspecified other impact via a crafted     USB device. (CVE-2017-16646)

  - The usbnet_generic_cdc_bind function in drivers/net/usb/cdc_ether.c in the Linux kernel through 4.13.11     allows local users to cause a denial of service (divide-by-zero error and system crash) or possibly have     unspecified other impact via a crafted USB device. (CVE-2017-16649)

  - The qmi_wwan_bind function in drivers/net/usb/qmi_wwan.c in the Linux kernel through 4.13.11 allows local     users to cause a denial of service (divide-by-zero error and system crash) or possibly have unspecified     other impact via a crafted USB device. (CVE-2017-16650)

  - The vhci_hcd driver in the Linux Kernel before version 4.14.8 and 4.4.114 allows allows local attackers to     disclose kernel memory addresses. Successful exploitation requires that a USB device is attached over IP.
    (CVE-2017-16911)

  - The get_pipe() function (drivers/usb/usbip/stub_rx.c) in the Linux Kernel before version 4.14.8, 4.9.71,     and 4.4.114 allows attackers to cause a denial of service (out-of-bounds read) via a specially crafted USB     over IP packet. (CVE-2017-16912)

  - The stub_recv_cmd_submit() function (drivers/usb/usbip/stub_rx.c) in the Linux Kernel before version     4.14.8, 4.9.71, and 4.4.114 when handling CMD_SUBMIT packets allows attackers to cause a denial of service     (arbitrary memory allocation) via a specially crafted USB over IP packet. (CVE-2017-16913)

  - The stub_send_ret_submit() function (drivers/usb/usbip/stub_tx.c) in the Linux Kernel before version     4.14.8, 4.9.71, 4.1.49, and 4.4.107 allows attackers to cause a denial of service (NULL pointer     dereference) via a specially crafted USB over IP packet. (CVE-2017-16914)

  - The walk_hugetlb_range function in mm/pagewalk.c in the Linux kernel before 4.14.2 mishandles holes in     hugetlb ranges, which allows local users to obtain sensitive information from uninitialized kernel memory     via crafted use of the mincore() system call. (CVE-2017-16994)

  - The check_alu_op function in kernel/bpf/verifier.c in the Linux kernel through 4.4 allows local users to     cause a denial of service (memory corruption) or possibly have unspecified other impact by leveraging     incorrect sign extension. (CVE-2017-16995)

  - net/netfilter/nfnetlink_cthelper.c in the Linux kernel through 4.14.4 does not require the CAP_NET_ADMIN     capability for new, get, and del operations, which allows local users to bypass intended access     restrictions because the nfnl_cthelper_list data structure is shared across all net namespaces.
    (CVE-2017-17448)

  - The __netlink_deliver_tap_skb function in net/netlink/af_netlink.c in the Linux kernel through 4.14.4,     when CONFIG_NLMON is enabled, does not restrict observations of Netlink messages to a single net     namespace, which allows local users to obtain sensitive information by leveraging the CAP_NET_ADMIN     capability to sniff an nlmon interface for all Netlink activity on the system. (CVE-2017-17449)

  - net/netfilter/xt_osf.c in the Linux kernel through 4.14.4 does not require the CAP_NET_ADMIN capability     for add_callback and remove_callback operations, which allows local users to bypass intended access     restrictions because the xt_osf_fingers data structure is shared across all net namespaces.
    (CVE-2017-17450)

  - The usb_destroy_configuration function in drivers/usb/core/config.c in the USB core subsystem in the Linux     kernel through 4.14.5 does not consider the maximum number of configurations and interfaces before     attempting to release resources, which allows local users to cause a denial of service (out-of-bounds     write access) or possibly have unspecified other impact via a crafted USB device. (CVE-2017-17558)

  - The KVM implementation in the Linux kernel through 4.14.7 allows attackers to obtain potentially sensitive     information from kernel memory, aka a write_mmio stack-based out-of-bounds read, related to     arch/x86/kvm/x86.c and include/trace/events/kvm.h. (CVE-2017-17741)

  - The Salsa20 encryption algorithm in the Linux kernel before 4.14.8 does not correctly handle zero-length     inputs, allowing a local attacker able to use the AF_ALG-based skcipher interface     (CONFIG_CRYPTO_USER_API_SKCIPHER) to cause a denial of service (uninitialized-memory free and kernel     crash) or have unspecified other impact by executing a crafted sequence of system calls that use the     blkcipher_walk API. Both the generic implementation (crypto/salsa20_generic.c) and x86 implementation     (arch/x86/crypto/salsa20_glue.c) of Salsa20 were vulnerable. (CVE-2017-17805)

  - The HMAC implementation (crypto/hmac.c) in the Linux kernel before 4.14.8 does not validate that the     underlying cryptographic hash algorithm is unkeyed, allowing a local attacker able to use the AF_ALG-based     hash interface (CONFIG_CRYPTO_USER_API_HASH) and the SHA-3 hash algorithm (CONFIG_CRYPTO_SHA3) to cause a     kernel stack buffer overflow by executing a crafted sequence of system calls that encounter a missing     SHA-3 initialization. (CVE-2017-17806)

  - The KEYS subsystem in the Linux kernel before 4.14.6 omitted an access-control check when adding a key to     the current task's default request-key keyring via the request_key() system call, allowing a local user     to use a sequence of crafted system calls to add keys to a keyring with only Search permission (not Write     permission) to that keyring, related to construct_get_dest_keyring() in security/keys/request_key.c.
    (CVE-2017-17807)

  - kernel/bpf/verifier.c in the Linux kernel through 4.14.8 ignores unreachable code, even though it would     still be processed by JIT compilers. This behavior, also considered an improper branch-pruning logic     issue, could possibly be used by local users for denial of service. (CVE-2017-17862)

  - crypto/pcrypt.c in the Linux kernel before 4.14.13 mishandles freeing instances, allowing a local user     able to access the AF_ALG-based AEAD interface (CONFIG_CRYPTO_USER_API_AEAD) and pcrypt     (CONFIG_CRYPTO_PCRYPT) to cause a denial of service (kfree of an incorrect pointer) or possibly have     unspecified other impact by executing a crafted sequence of system calls. (CVE-2017-18075)

  - The dm_get_from_kobject function in drivers/md/dm.c in the Linux kernel before 4.14.3 allow local users to     cause a denial of service (BUG) by leveraging a race condition with __dm_destroy during creation and     removal of DM devices. (CVE-2017-18203)

  - The ocfs2_setattr function in fs/ocfs2/file.c in the Linux kernel before 4.14.2 allows local users to     cause a denial of service (deadlock) via DIO requests. (CVE-2017-18204)

  - The madvise_willneed function in mm/madvise.c in the Linux kernel before 4.14.4 allows local users to     cause a denial of service (infinite loop) by triggering use of MADVISE_WILLNEED for a DAX mapping.
    (CVE-2017-18208)

  - A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap     flag(TF) bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exception(#DB)     being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate     their privileges inside the guest. Linux guests are not affected by this. (CVE-2017-7518)

  - Linux Linux kernel version at least v4.8 onwards, probably well before contains a Insufficient input     validation vulnerability in bnx2x network card driver that can result in DoS: Network card firmware     assertion takes card off-line. This attack appear to be exploitable via An attacker on a must pass a very     large, specially crafted packet to the bnx2x card. This can be done from an untrusted guest VM..
    (CVE-2018-1000026)

  - In the Linux kernel through 3.2, the rds_message_alloc_sgs() function does not validate a value that is     used during DMA page allocation, leading to a heap-based out-of-bounds write (related to the     rds_rdma_extra_size function in net/rds/rdma.c). (CVE-2018-5332)

  - In the Linux kernel through 4.14.13, the rds_cmsg_atomic function in net/rds/rdma.c mishandles cases where     page pinning fails or an invalid address is supplied, leading to an rds_atomic_free_op NULL pointer     dereference. (CVE-2018-5333)

  - In the Linux kernel through 4.14.13, drivers/block/loop.c mishandles lo_release serialization, which     allows attackers to cause a denial of service (__lock_acquire use-after-free) or possibly have unspecified     other impact. (CVE-2018-5344)

  - The futex_requeue function in kernel/futex.c in the Linux kernel before 4.14.15 might allow attackers to     cause a denial of service (integer overflow) or possibly have unspecified other impact by triggering a     negative wake or requeue value. (CVE-2018-6927)

  - A NULL pointer dereference was found in the net/rds/rdma.c __rds_rdma_map() function in the Linux kernel     before 4.14.7 allowing local attackers to cause a system panic and a denial-of-service, related to     RDS_GET_MR and RDS_GET_MR_FOR_DEST. (CVE-2018-7492)

  - The unimac_mdio_probe function in drivers/net/phy/mdio-bcm-unimac.c in the Linux kernel through 4.15.8     does not validate certain resource availability, which allows local users to cause a denial of service     (NULL pointer dereference). (CVE-2018-8043)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The SUSE Linux Enterprise 12 SP2 kernel was updated to 4.4.114 to receive various security and bugfixes. The following security bugs were fixed :

  - CVE-2017-5715: Systems with microprocessors utilizing     speculative execution and indirect branch prediction may     allow unauthorized disclosure of information to an     attacker with local user access via a side-channel     analysis (bnc#1068032). The previous fix using CPU     Microcode has been complemented by building the Linux     Kernel with return trampolines aka 'retpolines'.

  - CVE-2017-15129: A use-after-free vulnerability was found     in network namespaces code affecting the Linux kernel     The function get_net_ns_by_id() in     net/core/net_namespace.c did not check for the     net::count value after it has found a peer network in     netns_ids idr, which could lead to double free and     memory corruption. This vulnerability could allow an     unprivileged local user to induce kernel memory     corruption on the system, leading to a crash. Due to the     nature of the flaw, privilege escalation cannot be fully     ruled out, although it is thought to be unlikely     (bnc#1074839).

  - CVE-2017-17712: The raw_sendmsg() function in     net/ipv4/raw.c in the Linux kernel has a race condition     in inet->hdrincl that leads to uninitialized stack     pointer usage; this allowed a local user to execute code     and gain privileges (bnc#1073229).

  - CVE-2017-17862: kernel/bpf/verifier.c in the Linux     kernel ignored unreachable code, even though it would     still be processed by JIT compilers. This behavior, also     considered an improper branch-pruning logic issue, could     possibly be used by local users for denial of service     (bnc#1073928).

  - CVE-2017-17864: kernel/bpf/verifier.c in the Linux     kernel mishandled states_equal comparisons between the     pointer data type and the UNKNOWN_VALUE data type, which     allowed local users to obtain potentially sensitive     address information, aka a 'pointer leak (bnc#1073928).

  - CVE-2017-18017: The tcpmss_mangle_packet function in     net/netfilter/xt_TCPMSS.c in the Linux kernel allowed     remote attackers to cause a denial of service     (use-after-free and memory corruption) or possibly have     unspecified other impact by leveraging the presence of     xt_TCPMSS in an iptables action (bnc#1074488).

  - CVE-2018-1000004: In the Linux kernel a race condition     vulnerability existed in the sound system, this can lead     to a deadlock and denial of service condition     (bnc#1076017).

  - CVE-2018-5332: In the Linux kernel the     rds_message_alloc_sgs() function did not validate a     value that is used during DMA page allocation, leading     to a heap-based out-of-bounds write (related to the     rds_rdma_extra_size function in net/rds/rdma.c)     (bnc#1075621).

  - CVE-2018-5333: In the Linux kernel the rds_cmsg_atomic     function in net/rds/rdma.c mishandled cases where page     pinning fails or an invalid address is supplied, leading     to an rds_atomic_free_op NULL pointer dereference     (bnc#1075617).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The SUSE Linux Enterprise 12 SP3 kernel was updated to 4.4.114 to receive various security and bugfixes. The following security bugs were fixed :

  - CVE-2017-5715: Systems with microprocessors utilizing     speculative execution and indirect branch prediction may     allow unauthorized disclosure of information to an     attacker with local user access via a side-channel     analysis (bnc#1068032). The previous fix using CPU     Microcode has been complemented by building the Linux     Kernel with return trampolines aka 'retpolines'.

  - CVE-2017-15129: A use-after-free vulnerability was found     in network namespaces code affecting the Linux kernel in     the function get_net_ns_by_id() in     net/core/net_namespace.c did not check for the     net::count value after it has found a peer network in     netns_ids idr, which could lead to double free and     memory corruption. This vulnerability could allow an     unprivileged local user to induce kernel memory     corruption on the system, leading to a crash. Due to the     nature of the flaw, privilege escalation cannot be fully     ruled out, although it is thought to be unlikely     (bnc#1074839).

  - CVE-2017-17712: The raw_sendmsg() function in     net/ipv4/raw.c in the Linux kernel has a race condition     in inet->hdrincl that leads to uninitialized stack     pointer usage; this allowed a local user to execute code     and gain privileges (bnc#1073229).

  - CVE-2017-17862: kernel/bpf/verifier.c in the Linux     kernel ignored unreachable code, even though it would     still be processed by JIT compilers. This behavior, also     considered an improper branch-pruning logic issue, could     possibly be used by local users for denial of service     (bnc#1073928).

  - CVE-2017-17864: kernel/bpf/verifier.c in the Linux     kernel mishandled states_equal comparisons between the     pointer data type and the UNKNOWN_VALUE data type, which     allowed local users to obtain potentially sensitive     address information, aka a 'pointer leak (bnc#1073928).

  - CVE-2017-18017: The tcpmss_mangle_packet function in     net/netfilter/xt_TCPMSS.c in the Linux kernel allowed     remote attackers to cause a denial of service     (use-after-free and memory corruption) or possibly have     unspecified other impact by leveraging the presence of     xt_TCPMSS in an iptables action (bnc#1074488).

  - CVE-2018-5332: In the Linux kernel the     rds_message_alloc_sgs() function did not validate a     value that is used during DMA page allocation, leading     to a heap-based out-of-bounds write (related to the     rds_rdma_extra_size function in net/rds/rdma.c)     (bnc#1075621).

  - CVE-2018-5333: In the Linux kernel the rds_cmsg_atomic     function in net/rds/rdma.c mishandled cases where page     pinning fails or an invalid address is supplied, leading     to an rds_atomic_free_op NULL pointer dereference     (bnc#1075617).

  - CVE-2018-1000004: In the Linux kernel a race condition     vulnerability existed in the sound system, this can lead     to a deadlock and denial of service condition     (bnc#1076017).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The 4.14.11 stable kernel update contains a number of important fixes across the tree. This also includes the KPTI patches to mitigate the Meltdown vulnerability for x86 architectures.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel did not properly check the relationship between pointer values and the BPF stack. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-17863)

Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel improperly performed sign extension in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
(CVE-2017-16995)

Alexei Starovoitov discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel contained a branch-pruning logic issue around unreachable code. A local attacker could use this to cause a denial of service. (CVE-2017-17862)

Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel mishandled pointer data values in some situations. A local attacker could use this to to expose sensitive information (kernel memory). (CVE-2017-17864).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3523-2 advisory.

  - The check_alu_op function in kernel/bpf/verifier.c in the Linux kernel through 4.4 allows local users to     cause a denial of service (memory corruption) or possibly have unspecified other impact by leveraging     incorrect sign extension. (CVE-2017-16995)

  - kernel/bpf/verifier.c in the Linux kernel through 4.14.8 ignores unreachable code, even though it would     still be processed by JIT compilers. This behavior, also considered an improper branch-pruning logic     issue, could possibly be used by local users for denial of service. (CVE-2017-17862)

  - kernel/bpf/verifier.c in the Linux kernel 4.9.x through 4.9.71 does not check the relationship between     pointer values and the BPF stack, which allows local users to cause a denial of service (integer overflow     or invalid memory access) or possibly have unspecified other impact. (CVE-2017-17863)

  - kernel/bpf/verifier.c in the Linux kernel through 4.14.8 mishandles states_equal comparisons between the     pointer data type and the UNKNOWN_VALUE data type, which allows local users to obtain potentially     sensitive address information, aka a pointer leak. (CVE-2017-17864)

  - Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow     unauthorized disclosure of information to an attacker with local user access via a side-channel analysis     of the data cache. (CVE-2017-5754)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Jann Horn discovered that microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Meltdown. A local attacker could use this to expose sensitive information, including kernel memory. (CVE-2017-5754)

Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel did not properly check the relationship between pointer values and the BPF stack. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-17863)

Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel improperly performed sign extension in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
(CVE-2017-16995)

Alexei Starovoitov discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel contained a branch-pruning logic issue around unreachable code. A local attacker could use this to cause a denial of service. (CVE-2017-17862)

Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel mishandled pointer data values in some situations. A local attacker could use this to to expose sensitive information (kernel memory). (CVE-2017-17864).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The 4.14.11 stable kernel update contains a number of important fixes across the tree. This also includes the KPTI patches to mitigate the Meltdown vulnerability for x86 architectures

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

  - CVE-2017-8824     Mohamed Ghannam discovered that the DCCP implementation     did not correctly manage resources when a socket is     disconnected and reconnected, potentially leading to a     use-after-free. A local user could use this for denial     of service (crash or data corruption) or possibly for     privilege escalation. On systems that do not already     have the dccp module loaded, this can be mitigated by     disabling it:echo >> /etc/modprobe.d/disable-dccp.conf     install dccp false

  - CVE-2017-16538     Andrey Konovalov reported that the dvb-usb-lmedm04 media     driver did not correctly handle some error conditions     during initialisation. A physically present user with a     specially designed USB device can use this to cause a     denial of service (crash).

  - CVE-2017-16644     Andrey Konovalov reported that the hdpvr media driver     did not correctly handle some error conditions during     initialisation. A physically present user with a     specially designed USB device can use this to cause a     denial of service (crash).

  - CVE-2017-16995     Jann Horn discovered that the Extended BPF verifier did     not correctly model the behaviour of 32-bit load     instructions. A local user can use this for privilege     escalation.

  - CVE-2017-17448     Kevin Cernekee discovered that the netfilter subsystem     allowed users with the CAP_NET_ADMIN capability in any     user namespace, not just the root namespace, to enable     and disable connection tracking helpers. This could lead     to denial of service, violation of network security     policy, or have other impact.

  - CVE-2017-17449     Kevin Cernekee discovered that the netlink subsystem     allowed users with the CAP_NET_ADMIN capability in any     user namespace to monitor netlink traffic in all net     namespaces, not just those owned by that user namespace.
    This could lead to exposure of sensitive information.

  - CVE-2017-17450     Kevin Cernekee discovered that the xt_osf module allowed     users with the CAP_NET_ADMIN capability in any user     namespace to modify the global OS fingerprint list.

  - CVE-2017-17558     Andrey Konovalov reported that that USB core did not     correctly handle some error conditions during     initialisation. A physically present user with a     specially designed USB device can use this to cause a     denial of service (crash or memory corruption), or     possibly for privilege escalation.

  - CVE-2017-17712     Mohamed Ghannam discovered a race condition in the IPv4     raw socket implementation. A local user could use this     to obtain sensitive information from the kernel.

  - CVE-2017-17741     Dmitry Vyukov reported that the KVM implementation for     x86 would over-read data from memory when emulating an     MMIO write if the kvm_mmio tracepoint was enabled. A     guest virtual machine might be able to use this to cause     a denial of service (crash).

  - CVE-2017-17805     It was discovered that some implementations of the     Salsa20 block cipher did not correctly handle     zero-length input. A local user could use this to cause     a denial of service (crash) or possibly have other     security impact.

  - CVE-2017-17806     It was discovered that the HMAC implementation could be     used with an underlying hash algorithm that requires a     key, which was not intended. A local user could use this     to cause a denial of service (crash or memory     corruption), or possibly for privilege escalation.

  - CVE-2017-17807     Eric Biggers discovered that the KEYS subsystem lacked a     check for write permission when adding keys to a     process's default keyring. A local user could use this     to cause a denial of service or to obtain sensitive     information.

  - CVE-2017-17862     Alexei Starovoitov discovered that the Extended BPF     verifier ignored unreachable code, even though it would     still be processed by JIT compilers. This could possibly     be used by local users for denial of service. It also     increases the severity of bugs in determining     unreachable code.

  - CVE-2017-17863     Jann Horn discovered that the Extended BPF verifier did     not correctly model pointer arithmetic on the stack     frame pointer. A local user can use this for privilege     escalation.

  - CVE-2017-17864     Jann Horn discovered that the Extended BPF verifier     could fail to detect pointer leaks from conditional     code. A local user could use this to obtain sensitive     information in order to exploit other vulnerabilities.

  - CVE-2017-1000407     Andrew Honig reported that the KVM implementation for     Intel processors allowed direct access to host I/O port     0x80, which is not generally safe. On some systems this     allows a guest VM to cause a denial of service (crash)     of the host.

  - CVE-2017-1000410     Ben Seri reported that the Bluetooth subsystem did not     correctly handle short EFS information elements in L2CAP     messages. An attacker able to communicate over Bluetooth     could use this to obtain sensitive information from the     kernel.

The various problems in the Extended BPF verifier can be mitigated by disabling use of Extended BPF by unprivileged users:sysctl kernel.unprivileged_bpf_disabled=1

Debian disables unprivileged user namespaces by default, but if they are enabled (via the kernel.unprivileged_userns_clone sysctl) then CVE-2017-17448 can be exploited by any local user.

ID	Name	Product	Family	Severity
155902	SUSE SLES12 Security Update : kernel (SUSE-SU-2021:3935-1)	Nessus	SuSE Local Security Checks	high
124837	EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1516)	Nessus	Huawei Local Security Checks	critical
108878	Ubuntu 14.04 LTS : Linux kernel (Xenial HWE) vulnerabilities (USN-3619-2)	Nessus	Ubuntu Local Security Checks	high
108842	Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-3619-1)	Nessus	Ubuntu Local Security Checks	high
106748	SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2018:0416-1) (Spectre)	Nessus	SuSE Local Security Checks	critical
106740	openSUSE Security Update : the Linux Kernel (openSUSE-2018-153) (Spectre)	Nessus	SuSE Local Security Checks	critical
106672	SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2018:0383-1) (Spectre)	Nessus	SuSE Local Security Checks	critical
106024	Fedora 27 : kernel (2018-22d5fa8a90)	Nessus	Fedora Local Security Checks	high
105748	Ubuntu 17.10 : linux-raspi2 vulnerabilities (USN-3523-3)	Nessus	Ubuntu Local Security Checks	high
105747	Ubuntu 16.04 LTS : Linux kernel (HWE) vulnerabilities (USN-3523-2)	Nessus	Ubuntu Local Security Checks	high
105726	Ubuntu 17.10 : linux vulnerabilities (USN-3523-1) (Meltdown)	Nessus	Ubuntu Local Security Checks	high
105596	Fedora 26 : kernel (2018-8ed5eff2c0)	Nessus	Fedora Local Security Checks	high
105433	Debian DSA-4073-1 : linux - security update	Nessus	Debian Local Security Checks	high

Detections

Analytics

CVE-2017-17862

medium

Tenable Plugins

high

critical

high

high

critical

critical

critical

high

high

high

high

high

high