The remote Redhat Enterprise Linux 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:3822 advisory.

  - kernel: Use-after-free vulnerability in DCCP socket (CVE-2017-8824)

  - kernel: Use-after-free in sys_mq_notify() (CVE-2017-11176)

  - kernel: Use-after-free in snd_seq_ioctl_create_port() (CVE-2017-15265)

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 4.4.103 to receive various security and bugfixes. This update enables SMB encryption in the CIFS support in the Linux Kernel (fate#324404) The following security bugs were fixed :

  - CVE-2017-1000410: The Linux kernel was affected by an     information leak in the processing of incoming L2CAP     commands - ConfigRequest, and ConfigResponse messages.
    (bnc#1070535).

  - CVE-2017-11600: net/xfrm/xfrm_policy.c in the Linux     kernel did not ensure that the dir value of     xfrm_userpolicy_id is XFRM_POLICY_MAX or less, which     allowed local users to cause a denial of service     (out-of-bounds access) or possibly have unspecified     other impact via an XFRM_MSG_MIGRATE xfrm Netlink     message (bnc#1050231).

  - CVE-2017-12193: The     assoc_array_insert_into_terminal_node function in     lib/assoc_array.c in the Linux kernel mishandled node     splitting, which allowed local users to cause a denial     of service (NULL pointer dereference and panic) via a     crafted application, as demonstrated by the keyring key     type, and key addition and link creation operations     (bnc#1066192).

  - CVE-2017-15115: The sctp_do_peeloff function in     net/sctp/socket.c in the Linux kernel did not check     whether the intended netns is used in a peel-off action,     which allowed local users to cause a denial of service     (use-after-free and system crash) or possibly have     unspecified other impact via crafted system calls     (bnc#1068671).

  - CVE-2017-15265: Race condition in the ALSA subsystem in     the Linux kernel allowed local users to cause a denial     of service (use-after-free) or possibly have unspecified     other impact via crafted /dev/snd/seq ioctl calls,     related to sound/core/seq/seq_clientmgr.c and     sound/core/seq/seq_ports.c (bnc#1062520).

  - CVE-2017-16528: sound/core/seq_device.c in the Linux     kernel allowed 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 (bnc#1066629).

  - CVE-2017-16536: The cx231xx_usb_probe function in     drivers/media/usb/cx231xx/cx231xx-cards.c in the Linux     kernel allowed 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     (bnc#1066606).

  - CVE-2017-16537: The imon_probe function in     drivers/media/rc/imon.c in the Linux kernel allowed     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     (bnc#1066573).

  - CVE-2017-16645: The ims_pcu_get_cdc_union_desc function     in drivers/input/misc/ims-pcu.c in the Linux kernel     allowed 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 (bnc#1067132).

  - CVE-2017-16646:
    drivers/media/usb/dvb-usb/dib0700_devices.c in the Linux     kernel allowed local users to cause a denial of service     (BUG and system crash) or possibly have unspecified     other impact via a crafted USB device (bnc#1067105).

  - CVE-2017-16994: The walk_hugetlb_range function in     mm/pagewalk.c in the Linux kernel mishandled holes in     hugetlb ranges, which allowed local users to obtain     sensitive information from uninitialized kernel memory     via crafted use of the mincore() system call     (bnc#1069996).

  - CVE-2017-17448: net/netfilter/nfnetlink_cthelper.c in     the Linux kernel did not require the CAP_NET_ADMIN     capability for new, get, and del operations, which     allowed local users to bypass intended access     restrictions because the nfnl_cthelper_list data     structure is shared across all net namespaces     (bnc#1071693).

  - CVE-2017-17449: 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, did not restrict     observations of Netlink messages to a single net     namespace, which allowed 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 (bnc#1071694).

  - CVE-2017-17450: net/netfilter/xt_osf.c in the Linux     kernel did not require the CAP_NET_ADMIN capability for     add_callback and remove_callback operations, which     allowed local users to bypass intended access     restrictions because the xt_osf_fingers data structure     is shared across all net namespaces (bnc#1071695).

  - CVE-2017-7482: Fixed an overflow when decoding a krb5     principal. (bnc#1046107).

  - CVE-2017-8824: The dccp_disconnect function in     net/dccp/proto.c in the Linux kernel allowed local users     to gain privileges or cause a denial of service     (use-after-free) via an AF_UNSPEC connect system call     during the DCCP_LISTEN state (bnc#1070771).

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 remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:1170 advisory.

    The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with     extremely high determinism requirements.

    Security Fix(es):

    * kernel: Use-after-free vulnerability in DCCP socket (CVE-2017-8824, Important)

    * kernel: v4l2: disabled memory access protection mechanism allowing privilege escalation (CVE-2017-13166,     Important)

    * kernel: Incorrect type conversion for size during dma allocation (CVE-2017-9725, Moderate)

    * kernel: Use-after-free in snd_seq_ioctl_create_port() (CVE-2017-15265, Moderate)

    * kernel: Missing namespace check in net/netlink/af_netlink.c allows for network monitors to observe     systemwide activity (CVE-2017-17449, Moderate)

    * kernel: netfilter: use-after-free in tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c     (CVE-2017-18017, Moderate)

    * kernel: Stack information leak in the EFS element (CVE-2017-1000410, Moderate)

    For more details about the security issue(s), including the impact, a CVSS score, and other related     information, refer to the CVE page(s) listed in the References section.

    Red Hat would like to thank Mohamed Ghannam for reporting CVE-2017-8824 and Armis Labs for reporting     CVE-2017-1000410.

    Bug Fix(es):

    * The kernel-rt packages have been upgraded to version 3.10.0-693.25.2.rt56.612, which provides a number     of security and bug fixes over the previous version. (BZ#1549731)

    * Intel Core X-Series (Skylake) processors use a hardcoded Time Stamp Counter (TSC) frequency of 25 MHz.
    In some cases this can be imprecise and lead to timing-related problems such as time drift, timers being     triggered early, or TSC clock instability. This update mitigates these problems by no longer using the     native_calibrate_tsc() function to define the TSC frequency. Refined calibration is now used to update     the clock rate accordingly in these cases. (BZ#1547854)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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 installation on the remote host is affected by the following vulnerabilities :

  - A vulnerability was found in the Linux kernel where the     keyctl_set_reqkey_keyring() function leaks the thread     keyring. This allows an unprivileged local user to     exhaust kernel memory and thus cause a     DoS.(CVE-2017-7472)

  - A reference counter leak in Linux kernel in     ipxitf_ioctl function was found which results in a use     after free vulnerability that's triggerable from     unprivileged userspace when IPX interface is     configured.(CVE-2017-7487)

  - A vulnerability was found in the Linux kernel where     filesystems mounted with data=ordered mode may allow an     attacker to read stale data from recently allocated     blocks in new files after a system 'reset' by abusing     ext4 mechanics of delayed allocation.(CVE-2017-7495)

  - A race condition was found in the Linux kernel, present     since v3.14-rc1 through v4.12. The race happens between     threads of inotify_handle_event() and vfs_rename()     while running the rename operation against the same     file. As a result of the race the next slab data or the     slab's free list pointer can be corrupted with     attacker-controlled data, which may lead to the     privilege escalation.(CVE-2017-7533)

  - Kernel memory corruption due to a buffer overflow was     found in brcmf_cfg80211_mgmt_tx() function in Linux     kernels from v3.9-rc1 to v4.13-rc1. The vulnerability     can be triggered by sending a crafted NL80211_CMD_FRAME     packet via netlink. This flaw is unlikely to be     triggered remotely as certain userspace code is needed     for this. An unprivileged local user could use this     flaw 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 unlikely.(CVE-2017-7541)

  - An integer overflow vulnerability in     ip6_find_1stfragopt() function was found. A local     attacker that has privileges (of CAP_NET_RAW) to open     raw socket can cause an infinite loop inside the     ip6_find_1stfragopt() function.(CVE-2017-7542)

  - Incorrect error handling in the set_mempolicy() and     mbind() compat syscalls in 'mm/mempolicy.c' in the     Linux kernel allows local users to obtain sensitive     information from uninitialized stack data by triggering     failure of a certain bitmap operation.(CVE-2017-7616)

  - The NFS2/3 RPC client could send long arguments to the     NFS server. These encoded arguments are stored in an     array of memory pages, and accessed using pointer     variables. Arbitrarily long arguments could make these     pointers point outside the array and cause an     out-of-bounds memory access. A remote user or program     could use this flaw to crash the kernel, resulting in     denial of service.(CVE-2017-7645)

  - The NFSv2 and NFSv3 server implementations in the Linux     kernel through 4.10.13 lacked certain checks for the     end of a buffer. A remote attacker could trigger a     pointer-arithmetic error or possibly cause other     unspecified impacts using crafted requests related to     fs/nfsd/nfs3xdr.c and fs/nfsd/nfsxdr.c.(CVE-2017-7895)

  - It was found that the NFSv4 server in the Linux kernel     did not properly validate layout type when processing     NFSv4 pNFS LAYOUTGET and GETDEVICEINFO operands. A     remote attacker could use this flaw to soft-lockup the     system and thus cause denial of service.(CVE-2017-8797)

  - A use-after-free vulnerability was found in DCCP socket     code affecting the Linux kernel since 2.6.16. This     vulnerability could allow an attacker to their escalate     privileges.(CVE-2017-8824)

  - The inet_csk_clone_lock function in     net/ipv4/inet_connection_sock.c in the Linux kernel     allows attackers to cause a denial of service (double     free) or possibly have unspecified other impact by     leveraging use of the accept system call. An     unprivileged local user could use this flaw 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 we     believe it is unlikely.(CVE-2017-8890)

  - The edge_bulk_in_callback function in     drivers/usb/serial/io_ti.c in the Linux kernel allows     local users to obtain sensitive information (in the     dmesg ringbuffer and syslog) from uninitialized kernel     memory by using a crafted USB device (posing as an     io_ti USB serial device) to trigger an integer     underflow.(CVE-2017-8924)

  - The IPv6 fragmentation implementation in the Linux     kernel does not consider that the nexthdr field may be     associated with an invalid option, which allows local     users to cause a denial of service (out-of-bounds read     and BUG) or possibly have unspecified other impact via     crafted socket and send system calls. Due to the nature     of the flaw, privilege escalation cannot be fully ruled     out, although we believe it is unlikely.(CVE-2017-9074)

  - The sctp_v6_create_accept_sk function in     net/sctp/ipv6.c in the Linux kernel mishandles     inheritance, which allows local users to cause a denial     of service or possibly have unspecified other impact     via crafted system calls, a related issue to     CVE-2017-8890. An unprivileged local user could use     this flaw 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 we believe it is unlikely.(CVE-2017-9075)

  - The IPv6 DCCP implementation in the Linux kernel     mishandles inheritance, which allows local users to     cause a denial of service or possibly have unspecified     other impact via crafted system calls, a related issue     to CVE-2017-8890. An unprivileged local user could use     this flaw 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 we believe it is unlikely.(CVE-2017-9076)

  - The tcp_v6_syn_recv_sock function in     net/ipv6/tcp_ipv6.c in the Linux kernel mishandles     inheritance, which allows local users to cause a denial     of service or possibly have unspecified other impact     via crafted system calls, a related issue to     CVE-2017-8890. An unprivileged local user could use     this flaw 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 we believe it is unlikely.(CVE-2017-9077)

  - The __ip6_append_data function in net/ipv6/ip6_output.c     in the Linux kernel through 4.11.3 is too late in     checking whether an overwrite of an skb data structure     may occur, which allows local users to cause a denial     of service (system crash) via crafted system     calls.(CVE-2017-9242)

  - The vmw_gb_surface_define_ioctl function (accessible     via DRM_IOCTL_VMW_GB_SURFACE_CREATE) in     drivers/gpu/drm/vmwgfx/vmwgfx_surface.c in the Linux     kernel through 4.11.4 defines a backup_handle variable     but does not give it an initial value. If one attempts     to create a GB surface, with a previously allocated DMA     buffer to be used as a backup buffer, the backup_handle     variable does not get written to and is then later     returned to user space, allowing local users to obtain     sensitive information from uninitialized kernel memory     via a crafted ioctl call.(CVE-2017-9605)

  - In the Linux kernel versions 4.12, 3.10, 2.6, and     possibly earlier, a race condition vulnerability exists     in the sound system allowing for a potential deadlock     and memory corruption due to use-after-free condition     and thus denial of service. Due to the nature of the     flaw, privilege escalation cannot be fully ruled out,     although we believe it is unlikely.(CVE-2018-1000004)

  - The code in the drivers/scsi/libsas/sas_scsi_host.c     file in the Linux kernel allow a physically proximate     attacker to cause a memory leak in the ATA command     queue and, thus, denial of service by triggering     certain failure conditions.(CVE-2018-10021)

  - The kernel_wait4 function in kernel/exit.c in the Linux     kernel, when an unspecified architecture and compiler     is used, might allow local users to cause a denial of     service by triggering an attempted use of the -INT_MIN     value.(CVE-2018-10087)

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 Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:1319 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux operating system.

    Security Fix(es):

    * hw: cpu: speculative execution permission faults handling (CVE-2017-5754, x86 32-bit)

    * Kernel: error in exception handling leads to DoS (CVE-2018-8897)

    * kernel: nfsd: Incorrect handling of long RPC replies (CVE-2017-7645)

    * kernel: Use-after-free vulnerability in DCCP socket (CVE-2017-8824)

    * kernel: v4l2: disabled memory access protection mechanism allowing privilege escalation (CVE-2017-13166)

    * kernel: netfilter: use-after-free in tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c     (CVE-2017-18017)

    * kernel: Stack information leak in the EFS element (CVE-2017-1000410)

    For more details about the security issue(s), including the impact, a CVSS score, and other related     information, refer to the CVE page(s) listed in the References section.

    Red Hat would like to thank Google Project Zero for reporting CVE-2017-5754; Nick Peterson (Everdox Tech     LLC) and Andy Lutomirski for reporting CVE-2018-8897; Mohamed Ghannam for reporting CVE-2017-8824; and     Armis Labs for reporting CVE-2017-1000410.

    Bug Fix(es):

    These updated kernel packages include also numerous bug fixes. Space precludes documenting all of these     bug fixes in this advisory. See the bug fix descriptions in the related Knowledge Article:
    https://access.redhat.com/articles/3431591

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3582-2 advisory.

    USN-3582-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the     corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu     14.04 LTS.

    Mohamed Ghannam discovered that the IPv4 raw socket implementation in the Linux kernel contained a race     condition leading to uninitialized pointer usage. A local attacker could use this to cause a denial of     service or possibly execute arbitrary code. (CVE-2017-17712)

    Laurent Guerby discovered that the mbcache feature in the ext2 and ext4 filesystems in the Linux kernel     improperly handled xattr block caching. A local attacker could use this to cause a denial of service.
    (CVE-2015-8952)

    Vitaly Mayatskikh discovered that the SCSI subsystem in the Linux kernel did not properly track reference     counts when merging buffers. A local attacker could use this to cause a denial of service (memory     exhaustion). (CVE-2017-12190)

    ChunYu Wang discovered that a use-after-free vulnerability existed in the SCTP protocol implementation in     the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code, (CVE-2017-15115)

    Mohamed Ghannam discovered a use-after-free vulnerability in the DCCP protocol implementation in the Linux     kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute     arbitrary code. (CVE-2017-8824)

    USN-3540-2 mitigated CVE-2017-5715 (Spectre Variant 2) for the amd64 architecture in Ubuntu 14.04 LTS.
    This update provides the compiler-based retpoline kernel mitigation for the amd64 and i386 architectures.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:1216 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux operating system.

    Security Fix(es):

    * kernel: Use-after-free vulnerability in DCCP socket (CVE-2017-8824, Important)

    For more details about the security issue(s), including the impact, a CVSS score, and other related     information, refer to the CVE page(s) listed in the References section.

    Red Hat would like to thank Mohamed Ghannam for reporting this issue.

    Bug Fix(es):

    * Previously, the XFS code included a circular dependency between the xfs-log and the xfs-cil workqueues.
    Consequently, an XFS deadlock occurred in some cases. This update adds a new workqueue dedicated to the     log covering background task to avoid the deadlock. (BZ#1543303)

    * The kernel build requirements have been updated to the GNU Compiler Collection (GCC) compiler version     that has the support for Retpolines. The Retpolines mechanism is a software construct that leverages     specific knowledge of the underlying hardware to mitigate the branch target injection, also known as     Spectre variant 2 vulnerability described in CVE-2017-5715. (BZ#1553181)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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

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

  - CVE-2017-5754     Multiple researchers have discovered a vulnerability in     Intel processors, enabling an attacker controlling an     unprivileged process to read memory from arbitrary     addresses, including from the kernel and all other     processes running on the system.

  This specific attack has been named Meltdown and is addressed in the   Linux kernel for the Intel x86-64 architecture by a patch set named   Kernel Page Table Isolation, enforcing a near complete separation of   the kernel and userspace address maps and preventing the attack.
  This solution might have a performance impact, and can be disabled   at boot time by passing pti=off to the kernel command line.

  - 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-2017-15868     Al Viro found that the Bluebooth Network Encapsulation     Protocol (BNEP) implementation did not validate the type     of the second socket passed to the BNEPCONNADD ioctl(),     which could lead to memory corruption. A local user with     the CAP_NET_ADMIN capability can use this for denial of     service (crash or data corruption) or possibly for     privilege escalation.

  - 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-2017-16939     Mohamed Ghannam reported (through Beyond Security's     SecuriTeam Secure Disclosure program) that the IPsec     (xfrm) implementation did not correctly handle some     failure cases when dumping policy information through     netlink. A local user with the CAP_NET_ADMIN capability     can use this for denial of service (crash or data     corruption) or possibly 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-2017-17741     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-2017-1000407     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 remote OracleVM system is missing necessary patches to address critical security updates :

  - dm: fix race between dm_get_from_kobject and
    __dm_destroy (Hou Tao) (CVE-2017-18203)

  - drm: udl: Properly check framebuffer mmap offsets (Greg     Kroah-Hartman) [Orabug: 27986407] (CVE-2018-8781)

  - kernel/exit.c: avoid undefined behaviour when calling     wait4 wait4(-2147483648, 0x20, 0, 0xdd0000) triggers:
    UBSAN: Undefined behaviour in kernel/exit.c:1651:9     (mridula shastry) [Orabug: 27875488] (CVE-2018-10087)

  - kernel/signal.c: avoid undefined behaviour in     kill_something_info When running kill(72057458746458112,     0) in userspace I hit the following issue. (mridula     shastry) (CVE-2018-10124)

  - bluetooth: Validate socket address length in     sco_sock_bind. (mlevatic) [Orabug: 28130293]     (CVE-2015-8575)

  - dccp: check sk for closed state in dccp_sendmsg (Alexey     Kodanev) [Orabug: 28220402] (CVE-2017-8824)     (CVE-2018-1130)

  - sctp: verify size of a new chunk in _sctp_make_chunk     (Alexey Kodanev) [Orabug: 28240075] (CVE-2018-5803)

  - mm/mempolicy.c: fix error handling in set_mempolicy and     mbind. (Chris Salls) [Orabug: 28242478] (CVE-2017-7616)

  - xfrm: policy: check policy direction value (Vladis     Dronov) [Orabug: 28264121] (CVE-2017-11600)     (CVE-2017-11600)

  - x86/fpu: Make eager FPU default (Mihai Carabas) [Orabug:
    28156176] (CVE-2018-3665)

  - KVM: Fix stack-out-of-bounds read in write_mmio (Wanpeng     Li) [Orabug: 27951287] (CVE-2017-17741) (CVE-2017-17741)

  - xfs: set format back to extents if     xfs_bmap_extents_to_btree (Eric Sandeen) [Orabug:
    27989498] (CVE-2018-10323)

  - Bluetooth: Prevent stack info leak from the EFS element.
    (Ben Seri) [Orabug: 28030520] (CVE-2017-1000410)     (CVE-2017-1000410)

  - ALSA: hrtimer: Fix stall by hrtimer_cancel (Takashi     Iwai) [Orabug: 28058229] (CVE-2016-2549)

  - ALSA: timer: Harden slave timer list handling (Takashi     Iwai) [Orabug: 28058229] (CVE-2016-2547) (CVE-2016-2548)

  - ALSA: timer: Fix double unlink of active_list (Takashi     Iwai) [Orabug: 28058229] (CVE-2016-2545)

  - ALSA: seq: Fix missing NULL check at remove_events ioctl     (Takashi Iwai) [Orabug: 28058229] (CVE-2016-2543)

  - ALSA: seq: Fix race at timer setup and close (Takashi     Iwai) [Orabug: 28058229] (CVE-2016-2544)

  - ALSA: usb-audio: avoid freeing umidi object twice     (Andrey Konovalov) [Orabug: 28058229] (CVE-2016-2384)

  - perf/hwbp: Simplify the perf-hwbp code, fix     documentation (Linus Torvalds) [Orabug: 27947608]     (CVE-2018-1000199)

  - Revert 'perf/hwbp: Simplify the perf-hwbp code, fix     documentation' (Brian Maly) [Orabug: 27947608]

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has kernel-rt packages installed that are affected by multiple vulnerabilities:

  - A buffer overflow vulnerability due to a lack of input     filtering of incoming fragmented datagrams was found in     the IP-over-1394 driver [firewire-net] in a fragment     handling code in the Linux kernel. The vulnerability     exists since firewire supported IPv4, i.e. since version     2.6.31 (year 2009) till version v4.9-rc4. A maliciously     formed fragment with a respectively large datagram     offset would cause a memcpy() past the datagram buffer,     which would cause a system panic or possible arbitrary     code execution. The flaw requires [firewire-net] module     to be loaded and is remotely exploitable from connected     firewire devices, but not over a local network.
    (CVE-2016-8633)

  - The Linux Kernel imposes a size restriction on the     arguments and environmental strings passed through     RLIMIT_STACK/RLIMIT_INFINITY, but does not take the     argument and environment pointers into account, which     allows attackers to bypass this limitation.
    (CVE-2017-1000365)

  - A bug in the 32-bit compatibility layer of the ioctl     handling code of the v4l2 video driver in the Linux     kernel has been found. A memory protection mechanism     ensuring that user-provided buffers always point to a     userspace memory were disabled, allowing destination     address to be in a kernel space. This flaw could be     exploited by an attacker to overwrite a kernel memory     from an unprivileged userspace process, leading to     privilege escalation. (CVE-2017-13166)

  - The timer_create syscall implementation in     kernel/time/posix-timers.c in the Linux kernel doesn't     properly validate the sigevent->sigev_notify field,     which leads to out-of-bounds access in the show_timer     function. (CVE-2017-18344)

  - An industry-wide issue was found in the way many modern     microprocessor designs have implemented speculative     execution of instructions (a commonly used performance     optimization). There are three primary variants of the     issue which differ in the way the speculative execution     can be exploited. Variant CVE-2017-5715 triggers the     speculative execution by utilizing branch target     injection. It relies on the presence of a precisely-     defined instruction sequence in the privileged code as     well as the fact that memory accesses may cause     allocation into the microprocessor's data cache even for     speculatively executed instructions that never actually     commit (retire). As a result, an unprivileged attacker     could use this flaw to cross the syscall and guest/host     boundaries and read privileged memory by conducting     targeted cache side-channel attacks. (CVE-2017-5715)

  - An industry-wide issue was found in the way many modern     microprocessor designs have implemented speculative     execution of instructions (a commonly used performance     optimization). There are three primary variants of the     issue which differ in the way the speculative execution     can be exploited. Variant CVE-2017-5753 triggers the     speculative execution by performing a bounds-check     bypass. It relies on the presence of a precisely-defined     instruction sequence in the privileged code as well as     the fact that memory accesses may cause allocation into     the microprocessor's data cache even for speculatively     executed instructions that never actually commit     (retire). As a result, an unprivileged attacker could     use this flaw to cross the syscall boundary and read     privileged memory by conducting targeted cache side-     channel attacks. (CVE-2017-5753)

  - An industry-wide issue was found in the way many modern     microprocessor designs have implemented speculative     execution of instructions (a commonly used performance     optimization). There are three primary variants of the     issue which differ in the way the speculative execution     can be exploited. Variant CVE-2017-5754 relies on the     fact that, on impacted microprocessors, during     speculative execution of instruction permission faults,     exception generation triggered by a faulting access is     suppressed until the retirement of the whole instruction     block. In a combination with the fact that memory     accesses may populate the cache even when the block is     being dropped and never committed (executed), an     unprivileged local attacker could use this flaw to read     privileged (kernel space) memory by conducting targeted     cache side-channel attacks. Note: CVE-2017-5754 affects     Intel x86-64 microprocessors. AMD x86-64 microprocessors     are not affected by this issue. (CVE-2017-5754)

  - A use-after-free vulnerability was found in DCCP socket     code affecting the Linux kernel since 2.6.16. This     vulnerability could allow an attacker to their escalate     privileges. (CVE-2017-8824)

  - It was found that the raw midi kernel driver does not     protect against concurrent access which leads to a     double realloc (double free) in     snd_rawmidi_input_params() and     snd_rawmidi_output_status() which are part of     snd_rawmidi_ioctl() handler in rawmidi.c file. A     malicious local attacker could possibly use this for     privilege escalation. (CVE-2018-10902)

  - A vulnerability was found in the     fs/inode.c:inode_init_owner() function logic of the     LInux kernel that allows local users to create files     with an unintended group ownership and with group     execution and SGID permission bits set, in a scenario     where a directory is SGID and belongs to a certain group     and is writable by a user who is not a member of this     group. This can lead to excessive permissions granted in     case when they should not. (CVE-2018-13405)

  - An integer overflow flaw was found in the Linux kernel's     create_elf_tables() function. An unprivileged local user     with access to SUID (or otherwise privileged) binary     could use this flaw to escalate their privileges on the     system. (CVE-2018-14634)

  - An industry-wide issue was found in the way many modern     microprocessor designs have implemented speculative     execution of Load & Store instructions (a commonly used     performance optimization). It relies on the presence of     a precisely-defined instruction sequence in the     privileged code as well as the fact that memory read     from address to which a recent memory write has occurred     may see an older value and subsequently cause an update     into the microprocessor's data cache even for     speculatively executed instructions that never actually     commit (retire). As a result, an unprivileged attacker     could use this flaw to read privileged memory by     conducting targeted cache side-channel attacks.
    (CVE-2018-3639)

  - An industry-wide issue was found in the way many modern     microprocessor designs have implemented speculative     execution of instructions past bounds check. The flaw     relies on the presence of a precisely-defined     instruction sequence in the privileged code and the fact     that memory writes occur to an address which depends on     the untrusted value. Such writes cause an update into     the microprocessor's data cache even for speculatively     executed instructions that never actually commit     (retire). As a result, an unprivileged attacker could     use this flaw to influence speculative execution and/or     read privileged memory by conducting targeted cache     side-channel attacks. (CVE-2018-3693)

  - A flaw named SegmentSmack was found in the way the Linux     kernel handled specially crafted TCP packets. A remote     attacker could use this flaw to trigger time and     calculation expensive calls to tcp_collapse_ofo_queue()     and tcp_prune_ofo_queue() functions by sending specially     modified packets within ongoing TCP sessions which could     lead to a CPU saturation and hence a denial of service     on the system. Maintaining the denial of service     condition requires continuous two-way TCP sessions to a     reachable open port, thus the attacks cannot be     performed using spoofed IP addresses. (CVE-2018-5390)

  - A flaw named FragmentSmack was found in the way the     Linux kernel handled reassembly of fragmented IPv4 and     IPv6 packets. A remote attacker could use this flaw to     trigger time and calculation expensive fragment     reassembly algorithm by sending specially crafted     packets which could lead to a CPU saturation and hence a     denial of service on the system. (CVE-2018-5391)

  - A an integer overflow vulnerability was discovered in     the Linux kernel, from version 3.4 through 4.15, in the     drivers/gpu/drm/udl/udl_fb.c:udl_fb_mmap() function. An     attacker with access to the udldrmfb driver could     exploit this to obtain full read and write permissions     on kernel physical pages, resulting in a code execution     in kernel space. (CVE-2018-8781)

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

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.

The remote NewStart CGSL host, running version MAIN 4.05, has kernel packages installed that are affected by multiple vulnerabilities:

  - 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-2016-9555)

  - An exploitable memory corruption flaw was found in the     Linux kernel. The append path can be erroneously     switched from UFO to non-UFO in ip_ufo_append_data()     when building an UFO packet with MSG_MORE option. If     unprivileged user namespaces are available, this flaw     can be exploited to gain root privileges.
    (CVE-2017-1000112)

  - A bug in the 32-bit compatibility layer of the ioctl     handling code of the v4l2 video driver in the Linux     kernel has been found. A memory protection mechanism     ensuring that user-provided buffers always point to a     userspace memory were disabled, allowing destination     address to be in a kernel space. This flaw could be     exploited by an attacker to overwrite a kernel memory     from an unprivileged userspace process, leading to     privilege escalation. (CVE-2017-13166)

  - An industry-wide issue was found in the way many modern     microprocessor designs have implemented speculative     execution of instructions (a commonly used performance     optimization). There are three primary variants of the     issue which differ in the way the speculative execution     can be exploited. Variant CVE-2017-5753 triggers the     speculative execution by performing a bounds-check     bypass. It relies on the presence of a precisely-defined     instruction sequence in the privileged code as well as     the fact that memory accesses may cause allocation into     the microprocessor's data cache even for speculatively     executed instructions that never actually commit     (retire). As a result, an unprivileged attacker could     use this flaw to cross the syscall boundary and read     privileged memory by conducting targeted cache side-     channel attacks. (CVE-2017-5753)

  - An industry-wide issue was found in the way many modern     microprocessor designs have implemented speculative     execution of instructions (a commonly used performance     optimization). There are three primary variants of the     issue which differ in the way the speculative execution     can be exploited. Variant CVE-2017-5754 relies on the     fact that, on impacted microprocessors, during     speculative execution of instruction permission faults,     exception generation triggered by a faulting access is     suppressed until the retirement of the whole instruction     block. In a combination with the fact that memory     accesses may populate the cache even when the block is     being dropped and never committed (executed), an     unprivileged local attacker could use this flaw to read     privileged (kernel space) memory by conducting targeted     cache side-channel attacks. Note: CVE-2017-5754 affects     Intel x86-64 microprocessors. AMD x86-64 microprocessors     are not affected by this issue. (CVE-2017-5754)

  - 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 a system crash     or a privilege escalation. (CVE-2017-7308)

  - A use-after-free vulnerability was found in DCCP socket     code affecting the Linux kernel since 2.6.16. This     vulnerability could allow an attacker to their escalate     privileges. (CVE-2017-8824)

  - The do_get_mempolicy() function in mm/mempolicy.c in the     Linux kernel allows local users to hit a use-after-free     bug via crafted system calls and thus cause a denial of     service (DoS) or possibly have unspecified other impact.
    Due to the nature of the flaw, privilege escalation     cannot be fully ruled out. (CVE-2018-10675)

  - A flaw was found in Linux kernel's KVM virtualization     subsystem. The VMX code does not restore the GDT.LIMIT     to the previous host value, but instead sets it to 64KB.
    With a corrupted GDT limit a host's userspace code has     an ability to place malicious entries in the GDT,     particularly to the per-cpu variables. An attacker can     use this to escalate their privileges. (CVE-2018-10901)

  - An integer overflow flaw was found in the Linux kernel's     create_elf_tables() function. An unprivileged local user     with access to SUID (or otherwise privileged) binary     could use this flaw to escalate their privileges on the     system. (CVE-2018-14634)

  - An industry-wide issue was found in the way many modern     microprocessor designs have implemented speculative     execution of Load & Store instructions (a commonly used     performance optimization). It relies on the presence of     a precisely-defined instruction sequence in the     privileged code as well as the fact that memory read     from address to which a recent memory write has occurred     may see an older value and subsequently cause an update     into the microprocessor's data cache even for     speculatively executed instructions that never actually     commit (retire). As a result, an unprivileged attacker     could use this flaw to read privileged memory by     conducting targeted cache side-channel attacks.
    (CVE-2018-3639)

  - An industry-wide issue was found in the way many modern     microprocessor designs have implemented speculative     execution of instructions past bounds check. The flaw     relies on the presence of a precisely-defined     instruction sequence in the privileged code and the fact     that memory writes occur to an address which depends on     the untrusted value. Such writes cause an update into     the microprocessor's data cache even for speculatively     executed instructions that never actually commit     (retire). As a result, an unprivileged attacker could     use this flaw to influence speculative execution and/or     read privileged memory by conducting targeted cache     side-channel attacks. (CVE-2018-3693)

  - A flaw named SegmentSmack was found in the way the Linux     kernel handled specially crafted TCP packets. A remote     attacker could use this flaw to trigger time and     calculation expensive calls to tcp_collapse_ofo_queue()     and tcp_prune_ofo_queue() functions by sending specially     modified packets within ongoing TCP sessions which could     lead to a CPU saturation and hence a denial of service     on the system. Maintaining the denial of service     condition requires continuous two-way TCP sessions to a     reachable open port, thus the attacks cannot be     performed using spoofed IP addresses. (CVE-2018-5390)

  - A flaw named FragmentSmack was found in the way the     Linux kernel handled reassembly of fragmented IPv4 and     IPv6 packets. A remote attacker could use this flaw to     trigger time and calculation expensive fragment     reassembly algorithm by sending specially crafted     packets which could lead to a CPU saturation and hence a     denial of service on the system. (CVE-2018-5391)

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

ID	Name	Product	Family	Published	Updated	Severity
194121	RHEL 5 : kernel (RHSA-2018:3822)	Nessus	Red Hat Local Security Checks	4/27/2024	4/29/2024	high
105461	SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2017:3410-1)	Nessus	SuSE Local Security Checks	12/26/2017	11/10/2025	high
109335	RHEL 6 : kernel-rt (RHSA-2018:1170)	Nessus	Red Hat Local Security Checks	4/25/2018	6/3/2024	critical
124827	EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1504)	Nessus	Huawei Local Security Checks	5/13/2019	5/23/2024	critical
109634	RHEL 6 : kernel (RHSA-2018:1319)	Nessus	Red Hat Local Security Checks	5/9/2018	1/13/2026	critical
106973	Ubuntu 14.04 LTS : Linux kernel (Xenial HWE) vulnerabilities (USN-3582-2)	Nessus	Ubuntu Local Security Checks	2/23/2018	10/29/2024	high
109336	RHEL 7 : kernel (RHSA-2018:1216)	Nessus	Red Hat Local Security Checks	4/25/2018	3/19/2025	high
105704	Debian DSA-4082-1 : linux - security update (Meltdown)	Nessus	Debian Local Security Checks	1/10/2018	1/13/2026	high
111022	OracleVM 3.3 : Unbreakable / etc (OVMSA-2018-0237)	Nessus	OracleVM Local Security Checks	7/12/2018	9/5/2024	high
127233	NewStart CGSL CORE 5.04 / MAIN 5.04 : kernel-rt Multiple Vulnerabilities (NS-SA-2019-0049)	Nessus	NewStart CGSL Local Security Checks	8/12/2019	1/26/2026	high
105433	Debian DSA-4073-1 : linux - security update	Nessus	Debian Local Security Checks	12/26/2017	11/11/2025	high
127408	NewStart CGSL MAIN 4.05 : kernel Multiple Vulnerabilities (NS-SA-2019-0143)	Nessus	NewStart CGSL Local Security Checks	8/12/2019	1/26/2026	critical

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