The Linux kernel through 3.17.4 does not properly restrict dropping of supplemental group memberships in certain namespace scenarios, which allows local users to bypass intended file permissions by leveraging a POSIX ACL containing an entry for the group category that is more restrictive than the entry for the other category, aka a "negative groups" issue, related to kernel/groups.c, kernel/uid16.c, and kernel/user_namespace.c.

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 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-2017-7895i1/4%0

  - A flaw was found in the Linux kernel's ACPI subsystem     where a function does not flush the operand cache and     causes a kernel stack dump. This allows local users to     obtain sensitive information from kernel memory and     bypass the KASLR protection mechanism when using a     specially crafted ACPI table.(CVE-2017-13695i1/4%0

  - It was found that fanout_add() in     'net/packet/af_packet.c' in the Linux kernel, before     version 4.13.6, allows local users to gain privileges     via crafted system calls that trigger mishandling of     packet_fanout data structures, because of a race     condition (involving fanout_add and packet_do_bind)     that leads to a use-after-free bug.(CVE-2017-15649i1/4%0

  - Race condition in kernel/ucount.c in the Linux kernel     through 4.10.2 allows local users to cause a denial of     service (use-after-free and system crash) or possibly     have unspecified other impact via crafted system calls     that leverage certain decrement behavior that causes     incorrect interaction between put_ucounts and     get_ucounts.(CVE-2017-6874i1/4%0

  - An out-of-bounds memory access flaw, CVE-2014-7825, was     found in the syscall tracing functionality of the Linux     kernel's perf subsystem. A local, unprivileged user     could use this flaw to crash the system. Additionally,     an out-of-bounds memory access flaw, CVE-2014-7826, was     found in the syscall tracing functionality of the Linux     kernel's ftrace subsystem. On a system with ftrace     syscall tracing enabled, a local, unprivileged user     could use this flaw to crash the system, or escalate     their privileges.(CVE-2014-7825i1/4%0

  - The Salsa20 encryption algorithm in the Linux kernel,     before 4.14.8, does not correctly handle zero-length     inputs. This allows a local attacker the ability to use     the AF_ALG-based skcipher interface to cause a denial     of service (uninitialized-memory free and kernel crash)     or have an 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 are     vulnerable.(CVE-2017-17805i1/4%0

  - The msm_ipc_router_bind_control_port function in     net/ipc_router/ipc_router_core.c in the IPC router     kernel module for the Linux kernel 3.x, as used in     Qualcomm Innovation Center (QuIC) Android contributions     for MSM devices and other products, does not verify     that a port is a client port, which allows attackers to     gain privileges or cause a denial of service (race     condition and list corruption) by making many     BIND_CONTROL_PORT ioctl calls.(CVE-2016-2059i1/4%0

  - The do_remount function in fs/namespace.c in the Linux     kernel through 3.16.1 does not maintain the     MNT_LOCK_READONLY bit across a remount of a bind mount,     which allows local users to bypass an intended     read-only restriction and defeat certain sandbox     protection mechanisms via a 'mount -o remount' command     within a user namespace.(CVE-2014-5206i1/4%0

  - The ati_remote2_probe function in     drivers/input/misc/ati_remote2.c in the Linux kernel     before 4.5.1 allows physically proximate attackers to     cause a denial of service (NULL pointer dereference and     system crash) via a crafted endpoints value in a USB     device descriptor.(CVE-2016-2185i1/4%0

  - It was found that the fix for CVE-2014-3601 was     incomplete: the Linux kernel's kvm_iommu_map_pages()     function still handled IOMMU mapping failures     incorrectly. A privileged user in a guest with an     assigned host device could use this flaw to crash the     host.(CVE-2014-8369i1/4%0

  - A NULL pointer dereference was found in     net/rds/rdma.c:__rds_rdma_map() function in the Linux     kernel allowing local attackers to cause a system panic     and a denial-of-service.(CVE-2018-7492i1/4%0

  - An issue was discovered in the XFS filesystem in     fs/xfs/xfs_icache.c in the Linux kernel. There is a     NULL pointer dereference leading to a system panic in     lookup_slow() on a NULL inode-i1/4zi_ops pointer when     doing pathwalks on a corrupted xfs image. This occurs     because of a lack of proper validation that cached     inodes are free during an allocation.(CVE-2018-13093i1/4%0

  - The iowarrior_probe function in     drivers/usb/misc/iowarrior.c in the Linux kernel before     4.5.1 allows physically proximate attackers to cause a     denial of service (NULL pointer dereference and system     crash) via a crafted endpoints value in a USB device     descriptor.(CVE-2016-2188i1/4%0

  - Linux kernel built with the 802.1Q/802.1ad     VLAN(CONFIG_VLAN_8021Q) OR Virtual eXtensible Local     Area Network(CONFIG_VXLAN) with Transparent Ethernet     Bridging(TEB) GRO support, is vulnerable to a stack     overflow issue. It could occur while receiving large     packets via GRO path, as an unlimited recursion could     unfold in both VLAN and TEB modules, leading to a stack     corruption in the kernel.(CVE-2016-7039i1/4%0

  - The msr_mtrr_valid function in arch/x86/kvm/mtrr.c in     the Linux kernel before 4.6.1 supports MSR 0x2f8, which     allows guest OS users to read or write to the     kvm_arch_vcpu data structure, and consequently obtain     sensitive information or cause a denial of service     (system crash), via a crafted ioctl     call.(CVE-2016-3713i1/4%0

  - A flaw was found in the way the Linux kernel's VFS     subsystem handled reference counting when performing     unmount operations on symbolic links. A local,     unprivileged user could use this flaw to exhaust all     available memory on the system or, potentially, trigger     a use-after-free error, resulting in a system crash or     privilege escalation.(CVE-2014-5045i1/4%0

  - The KEYS subsystem in the Linux kernel before 4.13.10     does not correctly synchronize the actions of updating     versus finding a key in the 'negative' state to avoid a     race condition, which allows local users to cause a     denial of service or possibly have unspecified other     impact via crafted system calls.(CVE-2017-15951i1/4%0

  - The skb_flow_dissect function in     net/core/flow_dissector.c in the Linux kernel through     3.12 allows remote attackers to cause a denial of     service (infinite loop) via a small value in the IHL     field of a packet with IPIP     encapsulation.(CVE-2013-4348i1/4%0

  - The Linux kernel through 3.17.4 does not properly     restrict dropping of supplemental group memberships in     certain namespace scenarios, which allows local users     to bypass intended file permissions by leveraging a     POSIX ACL containing an entry for the group category     that is more restrictive than the entry for the other     category, aka a 'negative groups' issue, related to     kernel/groups.c, kernel/uid16.c, and     kernel/user_namespace.c.(CVE-2014-8989i1/4%0

  - An infinite-loop flaw was found in the kernel. When a     local user calls the sys_writev syscall with a     specially crafted sequence of iov structs, the     fuse_fill_write_pages kernel function might never     terminate, instead continuing in a tight loop. This     process cannot be terminated and requires a     reboot.(CVE-2015-8785i1/4%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 OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2017-0057 for details.

The openSUSE 13.2 kernel was updated to receive various security and bugfixes.

Following security bugs were fixed :

  - CVE-2016-0728: A reference leak in keyring handling with     join_session_keyring() could lead to local attackers     gain root privileges. (bsc#962075).

  - CVE-2015-7550: A local user could have triggered a race     between read and revoke in keyctl (bnc#958951).

  - CVE-2015-8569: The (1) pptp_bind and (2) pptp_connect     functions in drivers/net/ppp/pptp.c in the Linux kernel     did not verify an address length, which allowed local     users to obtain sensitive information from kernel memory     and bypass the KASLR protection mechanism via a crafted     application (bnc#959190).

  - CVE-2015-8543: The networking implementation in the     Linux kernel did not validate protocol identifiers for     certain protocol families, which allowed local users to     cause a denial of service (NULL function pointer     dereference and system crash) or possibly gain     privileges by leveraging CLONE_NEWUSER support to     execute a crafted SOCK_RAW application (bnc#958886).

  - CVE-2014-8989: The Linux kernel did not properly     restrict dropping of supplemental group memberships in     certain namespace scenarios, which allowed local users     to bypass intended file permissions by leveraging a     POSIX ACL containing an entry for the group category     that is more restrictive than the entry for the other     category, aka a 'negative groups' issue, related to     kernel/groups.c, kernel/uid16.c, and     kernel/user_namespace.c (bnc#906545).

  - CVE-2015-5157: arch/x86/entry/entry_64.S in the Linux     kernel on the x86_64 platform mishandles IRET faults in     processing NMIs that occurred during userspace     execution, which might allow local users to gain     privileges by triggering an NMI (bnc#937969).

  - CVE-2015-7799: The slhc_init function in     drivers/net/slip/slhc.c in the Linux kernel through     4.2.3 did not ensure that certain slot numbers are     valid, which allowed local users to cause a denial of     service (NULL pointer dereference and system crash) via     a crafted PPPIOCSMAXCID ioctl call (bnc#949936).

  - CVE-2015-8104: The KVM subsystem in the Linux kernel     through 4.2.6, and Xen 4.3.x through 4.6.x, allowed     guest OS users to cause a denial of service (host OS     panic or hang) by triggering many #DB (aka Debug)     exceptions, related to svm.c (bnc#954404).

  - CVE-2015-5307: The KVM subsystem in the Linux kernel     through 4.2.6, and Xen 4.3.x through 4.6.x, allowed     guest OS users to cause a denial of service (host OS     panic or hang) by triggering many #AC (aka Alignment     Check) exceptions, related to svm.c and vmx.c     (bnc#953527).

  - CVE-2014-9529: Race condition in the key_gc_unused_keys     function in security/keys/gc.c in the Linux kernel     allowed local users to cause a denial of service (memory     corruption or panic) or possibly have unspecified other     impact via keyctl commands that trigger access to a key     structure member during garbage collection of a key     (bnc#912202).

  - CVE-2015-7990: Race condition in the rds_sendmsg     function in net/rds/sendmsg.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 by using a socket that was not     properly bound. NOTE: this vulnerability exists because     of an incomplete fix for CVE-2015-6937 (bnc#952384     953052).

  - CVE-2015-6937: The __rds_conn_create function in     net/rds/connection.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 by using a socket that was not     properly bound (bnc#945825).

  - CVE-2015-7885: The dgnc_mgmt_ioctl function in     drivers/staging/dgnc/dgnc_mgmt.c in the Linux kernel     through 4.3.3 did not initialize a certain structure     member, which allowed local users to obtain sensitive     information from kernel memory via a crafted application     (bnc#951627).

  - CVE-2015-8215: net/ipv6/addrconf.c in the IPv6 stack in     the Linux kernel did not validate attempted changes to     the MTU value, which allowed context-dependent attackers     to cause a denial of service (packet loss) via a value     that is (1) smaller than the minimum compliant value or     (2) larger than the MTU of an interface, as demonstrated     by a Router Advertisement (RA) message that is not     validated by a daemon, a different vulnerability than     CVE-2015-0272. NOTE: the scope of CVE-2015-0272 is     limited to the NetworkManager product (bnc#955354).

  - CVE-2015-8767: A case can occur when sctp_accept() is     called by the user during a heartbeat timeout event     after the 4-way handshake. Since sctp_assoc_migrate()     changes both assoc->base.sk and assoc->ep, the     bh_sock_lock in sctp_generate_heartbeat_event() will be     taken with the listening socket but released with the     new association socket. The result is a deadlock on any     future attempts to take the listening socket lock.
    (bsc#961509)

  - CVE-2015-8575: Validate socket address length in     sco_sock_bind() to prevent information leak     (bsc#959399).

  - CVE-2015-8551, CVE-2015-8552: xen/pciback: For     XEN_PCI_OP_disable_msi[|x] only disable if device has     MSI(X) enabled (bsc#957990).

  - CVE-2015-8550: Compiler optimizations in the XEN PV     backend drivers could have lead to double fetch     vulnerabilities, causing denial of service or arbitrary     code execution (depending on the configuration)     (bsc#957988).

The following non-security bugs were fixed :

  - ALSA: hda - Disable 64bit address for Creative HDA     controllers (bnc#814440).

  - ALSA: hda - Fix noise problems on Thinkpad T440s     (boo#958504).

  - Input: aiptek - fix crash on detecting device without     endpoints (bnc#956708).

  - KEYS: Make /proc/keys unconditional if CONFIG_KEYS=y     (boo#956934).

  - KVM: x86: update masterclock values on TSC writes     (bsc#961739).

  - NFS: Fix a NULL pointer dereference of migration     recovery ops for v4.2 client (bsc#960839).

  - apparmor: allow SYS_CAP_RESOURCE to be sufficient to     prlimit another task (bsc#921949).

  - blktap: also call blkif_disconnect() when frontend     switched to closed (bsc#952976).

  - blktap: refine mm tracking (bsc#952976).

  - cdrom: Random writing support for BD-RE media     (bnc#959568).

  - genksyms: Handle string literals with spaces in     reference files (bsc#958510).

  - ipv4: Do not increase PMTU with Datagram Too Big message     (bsc#955224).

  - ipv6: distinguish frag queues by device for multicast     and link-local packets (bsc#955422).

  - ipv6: fix tunnel error handling (bsc#952579).

  - route: Use ipv4_mtu instead of raw rt_pmtu (bsc#955224).

  - uas: Add response iu handling (bnc#954138).

  - usbvision fix overflow of interfaces array (bnc#950998).

  - x86/evtchn: make use of PHYSDEVOP_map_pirq.

  - xen/pciback: Do not allow MSI-X ops if     PCI_COMMAND_MEMORY is not set (bsc#957990 XSA-157).

The openSUSE 13.1 kernel was updated to receive various security and bugfixes.

Following security bugs were fixed :

  - CVE-2016-0728: A reference leak in keyring handling with     join_session_keyring() could lead to local attackers     gain root privileges. (bsc#962075).

  - CVE-2015-7550: A local user could have triggered a race     between read and revoke in keyctl (bnc#958951).

  - CVE-2015-8569: The (1) pptp_bind and (2) pptp_connect     functions in drivers/net/ppp/pptp.c in the Linux kernel     did not verify an address length, which allowed local     users to obtain sensitive information from kernel memory     and bypass the KASLR protection mechanism via a crafted     application (bnc#959190).

  - CVE-2015-8543: The networking implementation in the     Linux kernel did not validate protocol identifiers for     certain protocol families, which allowed local users to     cause a denial of service (NULL function pointer     dereference and system crash) or possibly gain     privileges by leveraging CLONE_NEWUSER support to     execute a crafted SOCK_RAW application (bnc#958886).

  - CVE-2014-8989: The Linux kernel did not properly     restrict dropping of supplemental group memberships in     certain namespace scenarios, which allowed local users     to bypass intended file permissions by leveraging a     POSIX ACL containing an entry for the group category     that is more restrictive than the entry for the other     category, aka a 'negative groups' issue, related to     kernel/groups.c, kernel/uid16.c, and     kernel/user_namespace.c (bnc#906545).

  - CVE-2015-5157: arch/x86/entry/entry_64.S in the Linux     kernel on the x86_64 platform mishandles IRET faults in     processing NMIs that occurred during userspace     execution, which might allow local users to gain     privileges by triggering an NMI (bnc#937969).

  - CVE-2015-7799: The slhc_init function in     drivers/net/slip/slhc.c in the Linux kernel through     4.2.3 did not ensure that certain slot numbers are     valid, which allowed local users to cause a denial of     service (NULL pointer dereference and system crash) via     a crafted PPPIOCSMAXCID ioctl call (bnc#949936).

  - CVE-2015-8104: The KVM subsystem in the Linux kernel     through 4.2.6, and Xen 4.3.x through 4.6.x, allowed     guest OS users to cause a denial of service (host OS     panic or hang) by triggering many #DB (aka Debug)     exceptions, related to svm.c (bnc#954404).

  - CVE-2015-5307: The KVM subsystem in the Linux kernel     through 4.2.6, and Xen 4.3.x through 4.6.x, allowed     guest OS users to cause a denial of service (host OS     panic or hang) by triggering many #AC (aka Alignment     Check) exceptions, related to svm.c and vmx.c     (bnc#953527).

  - CVE-2014-9529: Race condition in the key_gc_unused_keys     function in security/keys/gc.c in the Linux kernel     allowed local users to cause a denial of service (memory     corruption or panic) or possibly have unspecified other     impact via keyctl commands that trigger access to a key     structure member during garbage collection of a key     (bnc#912202).

  - CVE-2015-7990: Race condition in the rds_sendmsg     function in net/rds/sendmsg.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 by using a socket that was not     properly bound. NOTE: this vulnerability exists because     of an incomplete fix for CVE-2015-6937 (bnc#952384     953052).

  - CVE-2015-6937: The __rds_conn_create function in     net/rds/connection.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 by using a socket that was not     properly bound (bnc#945825).

  - CVE-2015-7885: The dgnc_mgmt_ioctl function in     drivers/staging/dgnc/dgnc_mgmt.c in the Linux kernel     through 4.3.3 did not initialize a certain structure     member, which allowed local users to obtain sensitive     information from kernel memory via a crafted application     (bnc#951627).

  - CVE-2015-8215: net/ipv6/addrconf.c in the IPv6 stack in     the Linux kernel did not validate attempted changes to     the MTU value, which allowed context-dependent attackers     to cause a denial of service (packet loss) via a value     that is (1) smaller than the minimum compliant value or     (2) larger than the MTU of an interface, as demonstrated     by a Router Advertisement (RA) message that is not     validated by a daemon, a different vulnerability than     CVE-2015-0272. NOTE: the scope of CVE-2015-0272 is     limited to the NetworkManager product (bnc#955354).

  - CVE-2015-8767: A case can occur when sctp_accept() is     called by the user during a heartbeat timeout event     after the 4-way handshake. Since sctp_assoc_migrate()     changes both assoc->base.sk and assoc->ep, the     bh_sock_lock in sctp_generate_heartbeat_event() will be     taken with the listening socket but released with the     new association socket. The result is a deadlock on any     future attempts to take the listening socket lock.
    (bsc#961509)

  - CVE-2015-8575: Validate socket address length in     sco_sock_bind() to prevent information leak     (bsc#959399).

  - CVE-2015-8551, CVE-2015-8552: xen/pciback: For     XEN_PCI_OP_disable_msi[|x] only disable if device has     MSI(X) enabled (bsc#957990).

  - CVE-2015-8550: Compiler optimizations in the XEN PV     backend drivers could have lead to double fetch     vulnerabilities, causing denial of service or arbitrary     code execution (depending on the configuration)     (bsc#957988).

The following non-security bugs were fixed :

  - ALSA: hda - Disable 64bit address for Creative HDA     controllers (bnc#814440).

  - ALSA: hda - Fix noise problems on Thinkpad T440s     (boo#958504).

  - Input: aiptek - fix crash on detecting device without     endpoints (bnc#956708).

  - KEYS: Make /proc/keys unconditional if CONFIG_KEYS=y     (boo#956934).

  - KVM: x86: update masterclock values on TSC writes     (bsc#961739).

  - NFS: Fix a NULL pointer dereference of migration     recovery ops for v4.2 client (bsc#960839).

  - apparmor: allow SYS_CAP_RESOURCE to be sufficient to     prlimit another task (bsc#921949).

  - blktap: also call blkif_disconnect() when frontend     switched to closed (bsc#952976).

  - blktap: refine mm tracking (bsc#952976).

  - cdrom: Random writing support for BD-RE media     (bnc#959568).

  - genksyms: Handle string literals with spaces in     reference files (bsc#958510).

  - ipv4: Do not increase PMTU with Datagram Too Big message     (bsc#955224).

  - ipv6: distinguish frag queues by device for multicast     and link-local packets (bsc#955422).

  - ipv6: fix tunnel error handling (bsc#952579).

  - route: Use ipv4_mtu instead of raw rt_pmtu (bsc#955224).

  - uas: Add response iu handling (bnc#954138).

  - usbvision fix overflow of interfaces array (bnc#950998).

  - x86/evtchn: make use of PHYSDEVOP_map_pirq.

  - xen/pciback: Do not allow MSI-X ops if     PCI_COMMAND_MEMORY is not set (bsc#957990 XSA-157).

The remote OracleVM system is missing necessary patches to address critical security updates in kernel-uek.

The remote Oracle Linux 6 / 7 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2015-3064 advisory.

  - The Linux kernel through 3.17.4 does not properly restrict dropping of supplemental group memberships in     certain namespace scenarios, which allows local users to bypass intended file permissions by leveraging a     POSIX ACL containing an entry for the group category that is more restrictive than the entry for the other     category, aka a negative groups issue, related to kernel/groups.c, kernel/uid16.c, and     kernel/user_namespace.c. (CVE-2014-8989)

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

Multiple vulnerabilities has been found and corrected in the Linux kernel :

The Crypto API in the Linux kernel before 3.18.5 allows local users to load arbitrary kernel modules via a bind system call for an AF_ALG socket with a module name in the salg_name field, a different vulnerability than CVE-2014-9644 (CVE-2013-7421).

arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.17.2 on Intel processors does not ensure that the value in the CR4 control register remains the same after a VM entry, which allows host OS users to kill arbitrary processes or cause a denial of service (system disruption) by leveraging /dev/kvm access, as demonstrated by PR_SET_TSC prctl calls within a modified copy of QEMU (CVE-2014-3690).

arch/x86/kernel/tls.c in the Thread Local Storage (TLS) implementation in the Linux kernel through 3.18.1 allows local users to bypass the espfix protection mechanism, and consequently makes it easier for local users to bypass the ASLR protection mechanism, via a crafted application that makes a set_thread_area system call and later reads a 16-bit value (CVE-2014-8133).

net/netfilter/nf_conntrack_proto_generic.c in the Linux kernel before 3.18 generates incorrect conntrack entries during handling of certain iptables rule sets for the SCTP, DCCP, GRE, and UDP-Lite protocols, which allows remote attackers to bypass intended access restrictions via packets with disallowed port numbers (CVE-2014-8160).

The Linux kernel through 3.17.4 does not properly restrict dropping of supplemental group memberships in certain namespace scenarios, which allows local users to bypass intended file permissions by leveraging a POSIX ACL containing an entry for the group category that is more restrictive than the entry for the other category, aka a negative groups issue, related to kernel/groups.c, kernel/uid16.c, and kernel/user_namespace.c (CVE-2014-8989).

The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel through 3.18.1 does not ensure that Thread Local Storage (TLS) descriptors are loaded before proceeding with other steps, which makes it easier for local users to bypass the ASLR protection mechanism via a crafted application that reads a TLS base address (CVE-2014-9419).

The rock_continue function in fs/isofs/rock.c in the Linux kernel through 3.18.1 does not restrict the number of Rock Ridge continuation entries, which allows local users to cause a denial of service (infinite loop, and system crash or hang) via a crafted iso9660 image (CVE-2014-9420).

The batadv_frag_merge_packets function in net/batman-adv/fragmentation.c in the B.A.T.M.A.N. implementation in the Linux kernel through 3.18.1 uses an incorrect length field during a calculation of an amount of memory, which allows remote attackers to cause a denial of service (mesh-node system crash) via fragmented packets (CVE-2014-9428).

Race condition in the key_gc_unused_keys function in security/keys/gc.c in the Linux kernel through 3.18.2 allows local users to cause a denial of service (memory corruption or panic) or possibly have unspecified other impact via keyctl commands that trigger access to a key structure member during garbage collection of a key (CVE-2014-9529).

The parse_rock_ridge_inode_internal function in fs/isofs/rock.c in the Linux kernel before 3.18.2 does not validate a length value in the Extensions Reference (ER) System Use Field, which allows local users to obtain sensitive information from kernel memory via a crafted iso9660 image (CVE-2014-9584).

The vdso_addr function in arch/x86/vdso/vma.c in the Linux kernel through 3.18.2 does not properly choose memory locations for the vDSO area, which makes it easier for local users to bypass the ASLR protection mechanism by guessing a location at the end of a PMD (CVE-2014-9585).

The Crypto API in the Linux kernel before 3.18.5 allows local users to load arbitrary kernel modules via a bind system call for an AF_ALG socket with a parenthesized module template expression in the salg_name field, as demonstrated by the vfat(aes) expression, a different vulnerability than CVE-2013-7421 (CVE-2014-9644).

Off-by-one error in the ecryptfs_decode_from_filename function in fs/ecryptfs/crypto.c in the eCryptfs subsystem in the Linux kernel before 3.18.2 allows local users to cause a denial of service (buffer overflow and system crash) or possibly gain privileges via a crafted filename (CVE-2014-9683).

The em_sysenter function in arch/x86/kvm/emulate.c in the Linux kernel before 3.18.5, when the guest OS lacks SYSENTER MSR initialization, allows guest OS users to gain guest OS privileges or cause a denial of service (guest OS crash) by triggering use of a 16-bit code segment for emulation of a SYSENTER instruction (CVE-2015-0239).

The updated packages provides a solution for these security issues.

The remote Ubuntu 14.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-2516-3 advisory.

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

USN-2515-1 fixed vulnerabilities in the Linux kernel. There was an unrelated regression in the use of the virtual counter (CNTVCT) on arm64 architectures. This update fixes the problem.

We apologize for the inconvenience.

A flaw was discovered in the Kernel Virtual Machine's (KVM) emulation of the SYSTENTER instruction when the guest OS does not initialize the SYSENTER MSRs. A guest OS user could exploit this flaw to cause a denial of service of the guest OS (crash) or potentially gain privileges on the guest OS. (CVE-2015-0239)

Andy Lutomirski discovered an information leak in the Linux kernel's Thread Local Storage (TLS) implementation allowing users to bypass the espfix to obtain information that could be used to bypass the Address Space Layout Randomization (ASLR) protection mechanism. A local user could exploit this flaw to obtain potentially sensitive information from kernel memory. (CVE-2014-8133)

A restriction bypass was discovered in iptables when conntrack rules are specified and the conntrack protocol handler module is not loaded into the Linux kernel. This flaw can cause the firewall rules on the system to be bypassed when conntrack rules are used. (CVE-2014-8160)

A flaw was discovered with file renaming in the linux kernel. A local user could exploit this flaw to cause a denial of service (deadlock and system hang). (CVE-2014-8559)

A flaw was discovered in how supplemental group memberships are handled in certain namespace scenarios. A local user could exploit this flaw to bypass file permission restrictions. (CVE-2014-8989)

A flaw was discovered in how Thread Local Storage (TLS) is handled by the task switching function in the Linux kernel for x86_64 based machines. A local user could exploit this flaw to bypass the Address Space Layout Radomization (ASLR) protection mechanism. (CVE-2014-9419)

Prasad J Pandit reported a flaw in the rock_continue function of the Linux kernel's ISO 9660 CDROM file system. A local user could exploit this flaw to cause a denial of service (system crash or hang).
(CVE-2014-9420)

A flaw was discovered in the fragment handling of the B.A.T.M.A.N.
Advanced Meshing Protocol in the Linux kernel. A remote attacker could exploit this flaw to cause a denial of service (mesh-node system crash) via fragmented packets. (CVE-2014-9428)

A race condition was discovered in the Linux kernel's key ring. A local user could cause a denial of service (memory corruption or panic) or possibly have unspecified impact via the keyctl commands.
(CVE-2014-9529)

A memory leak was discovered in the ISO 9660 CDROM file system when parsing rock ridge ER records. A local user could exploit this flaw to obtain sensitive information from kernel memory via a crafted iso9660 image. (CVE-2014-9584)

A flaw was discovered in the Address Space Layout Randomization (ASLR) of the Virtual Dynamically linked Shared Objects (vDSO) location. This flaw makes it easier for a local user to bypass the ASLR protection mechanism. (CVE-2014-9585)

Dmitry Chernenkov discovered a buffer overflow in eCryptfs' encrypted file name decoding. A local unprivileged user could exploit this flaw to cause a denial of service (system crash) or potentially gain administrative privileges. (CVE-2014-9683).

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 14.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-2516-2 advisory.

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

A flaw was discovered in the Kernel Virtual Machine's (KVM) emulation of the SYSTENTER instruction when the guest OS does not initialize the SYSENTER MSRs. A guest OS user could exploit this flaw to cause a denial of service of the guest OS (crash) or potentially gain privileges on the guest OS. (CVE-2015-0239)

Andy Lutomirski discovered an information leak in the Linux kernel's Thread Local Storage (TLS) implementation allowing users to bypass the espfix to obtain information that could be used to bypass the Address Space Layout Randomization (ASLR) protection mechanism. A local user could exploit this flaw to obtain potentially sensitive information from kernel memory. (CVE-2014-8133)

A restriction bypass was discovered in iptables when conntrack rules are specified and the conntrack protocol handler module is not loaded into the Linux kernel. This flaw can cause the firewall rules on the system to be bypassed when conntrack rules are used. (CVE-2014-8160)

A flaw was discovered with file renaming in the linux kernel. A local user could exploit this flaw to cause a denial of service (deadlock and system hang). (CVE-2014-8559)

A flaw was discovered in how supplemental group memberships are handled in certain namespace scenarios. A local user could exploit this flaw to bypass file permission restrictions. (CVE-2014-8989)

A flaw was discovered in how Thread Local Storage (TLS) is handled by the task switching function in the Linux kernel for x86_64 based machines. A local user could exploit this flaw to bypass the Address Space Layout Radomization (ASLR) protection mechanism. (CVE-2014-9419)

Prasad J Pandit reported a flaw in the rock_continue function of the Linux kernel's ISO 9660 CDROM file system. A local user could exploit this flaw to cause a denial of service (system crash or hang).
(CVE-2014-9420)

A flaw was discovered in the fragment handling of the B.A.T.M.A.N.
Advanced Meshing Protocol in the Linux kernel. A remote attacker could exploit this flaw to cause a denial of service (mesh-node system crash) via fragmented packets. (CVE-2014-9428)

A race condition was discovered in the Linux kernel's key ring. A local user could cause a denial of service (memory corruption or panic) or possibly have unspecified impact via the keyctl commands.
(CVE-2014-9529)

A memory leak was discovered in the ISO 9660 CDROM file system when parsing rock ridge ER records. A local user could exploit this flaw to obtain sensitive information from kernel memory via a crafted iso9660 image. (CVE-2014-9584)

A flaw was discovered in the Address Space Layout Randomization (ASLR) of the Virtual Dynamically linked Shared Objects (vDSO) location. This flaw makes it easier for a local user to bypass the ASLR protection mechanism. (CVE-2014-9585)

Dmitry Chernenkov discovered a buffer overflow in eCryptfs' encrypted file name decoding. A local unprivileged user could exploit this flaw to cause a denial of service (system crash) or potentially gain administrative privileges. (CVE-2014-9683).

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 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-2517-1 advisory.

  - arch/x86/kernel/tls.c in the Thread Local Storage (TLS) implementation in the Linux kernel through 3.18.1     allows local users to bypass the espfix protection mechanism, and consequently makes it easier for local     users to bypass the ASLR protection mechanism, via a crafted application that makes a set_thread_area     system call and later reads a 16-bit value. (CVE-2014-8133)

  - net/netfilter/nf_conntrack_proto_generic.c in the Linux kernel before 3.18 generates incorrect conntrack     entries during handling of certain iptables rule sets for the SCTP, DCCP, GRE, and UDP-Lite protocols,     which allows remote attackers to bypass intended access restrictions via packets with disallowed port     numbers. (CVE-2014-8160)

  - The d_walk function in fs/dcache.c in the Linux kernel through 3.17.2 does not properly maintain the     semantics of rename_lock, which allows local users to cause a denial of service (deadlock and system hang)     via a crafted application. (CVE-2014-8559)

  - The Linux kernel through 3.17.4 does not properly restrict dropping of supplemental group memberships in     certain namespace scenarios, which allows local users to bypass intended file permissions by leveraging a     POSIX ACL containing an entry for the group category that is more restrictive than the entry for the other     category, aka a negative groups issue, related to kernel/groups.c, kernel/uid16.c, and     kernel/user_namespace.c. (CVE-2014-8989)

  - The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel through 3.18.1 does not     ensure that Thread Local Storage (TLS) descriptors are loaded before proceeding with other steps, which     makes it easier for local users to bypass the ASLR protection mechanism via a crafted application that     reads a TLS base address. (CVE-2014-9419)

  - The rock_continue function in fs/isofs/rock.c in the Linux kernel through 3.18.1 does not restrict the     number of Rock Ridge continuation entries, which allows local users to cause a denial of service (infinite     loop, and system crash or hang) via a crafted iso9660 image. (CVE-2014-9420)

  - The batadv_frag_merge_packets function in net/batman-adv/fragmentation.c in the B.A.T.M.A.N.
    implementation in the Linux kernel through 3.18.1 uses an incorrect length field during a calculation of     an amount of memory, which allows remote attackers to cause a denial of service (mesh-node system crash)     via fragmented packets. (CVE-2014-9428)

  - Race condition in the key_gc_unused_keys function in security/keys/gc.c in the Linux kernel through 3.18.2     allows local users to cause a denial of service (memory corruption or panic) or possibly have unspecified     other impact via keyctl commands that trigger access to a key structure member during garbage collection     of a key. (CVE-2014-9529)

  - The parse_rock_ridge_inode_internal function in fs/isofs/rock.c in the Linux kernel before 3.18.2 does not     validate a length value in the Extensions Reference (ER) System Use Field, which allows local users to     obtain sensitive information from kernel memory via a crafted iso9660 image. (CVE-2014-9584)

  - The vdso_addr function in arch/x86/vdso/vma.c in the Linux kernel through 3.18.2 does not properly choose     memory locations for the vDSO area, which makes it easier for local users to bypass the ASLR protection     mechanism by guessing a location at the end of a PMD. (CVE-2014-9585)

  - Off-by-one error in the ecryptfs_decode_from_filename function in fs/ecryptfs/crypto.c in the eCryptfs     subsystem in the Linux kernel before 3.18.2 allows local users to cause a denial of service (buffer     overflow and system crash) or possibly gain privileges via a crafted filename. (CVE-2014-9683)

  - The UDF filesystem implementation in the Linux kernel before 3.18.2 does not validate certain lengths,     which allows local users to cause a denial of service (buffer over-read and system crash) via a crafted     filesystem image, related to fs/udf/inode.c and fs/udf/symlink.c. (CVE-2014-9728)

  - The udf_read_inode function in fs/udf/inode.c in the Linux kernel before 3.18.2 does not ensure a certain     data-structure size consistency, which allows local users to cause a denial of service (system crash) via     a crafted UDF filesystem image. (CVE-2014-9729)

  - The udf_pc_to_char function in fs/udf/symlink.c in the Linux kernel before 3.18.2 relies on component     lengths that are unused, which allows local users to cause a denial of service (system crash) via a     crafted UDF filesystem image. (CVE-2014-9730)

  - The UDF filesystem implementation in the Linux kernel before 3.18.2 does not ensure that space is     available for storing a symlink target's name along with a trailing \0 character, which allows local users     to obtain sensitive information via a crafted filesystem image, related to fs/udf/symlink.c and     fs/udf/unicode.c. (CVE-2014-9731)

  - The em_sysenter function in arch/x86/kvm/emulate.c in the Linux kernel before 3.18.5, when the guest OS     lacks SYSENTER MSR initialization, allows guest OS users to gain guest OS privileges or cause a denial of     service (guest OS crash) by triggering use of a 16-bit code segment for emulation of a SYSENTER     instruction. (CVE-2015-0239)

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-2516-1 advisory.

  - arch/x86/kernel/tls.c in the Thread Local Storage (TLS) implementation in the Linux kernel through 3.18.1     allows local users to bypass the espfix protection mechanism, and consequently makes it easier for local     users to bypass the ASLR protection mechanism, via a crafted application that makes a set_thread_area     system call and later reads a 16-bit value. (CVE-2014-8133)

  - net/netfilter/nf_conntrack_proto_generic.c in the Linux kernel before 3.18 generates incorrect conntrack     entries during handling of certain iptables rule sets for the SCTP, DCCP, GRE, and UDP-Lite protocols,     which allows remote attackers to bypass intended access restrictions via packets with disallowed port     numbers. (CVE-2014-8160)

  - The d_walk function in fs/dcache.c in the Linux kernel through 3.17.2 does not properly maintain the     semantics of rename_lock, which allows local users to cause a denial of service (deadlock and system hang)     via a crafted application. (CVE-2014-8559)

  - The Linux kernel through 3.17.4 does not properly restrict dropping of supplemental group memberships in     certain namespace scenarios, which allows local users to bypass intended file permissions by leveraging a     POSIX ACL containing an entry for the group category that is more restrictive than the entry for the other     category, aka a negative groups issue, related to kernel/groups.c, kernel/uid16.c, and     kernel/user_namespace.c. (CVE-2014-8989)

  - The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel through 3.18.1 does not     ensure that Thread Local Storage (TLS) descriptors are loaded before proceeding with other steps, which     makes it easier for local users to bypass the ASLR protection mechanism via a crafted application that     reads a TLS base address. (CVE-2014-9419)

  - The rock_continue function in fs/isofs/rock.c in the Linux kernel through 3.18.1 does not restrict the     number of Rock Ridge continuation entries, which allows local users to cause a denial of service (infinite     loop, and system crash or hang) via a crafted iso9660 image. (CVE-2014-9420)

  - The batadv_frag_merge_packets function in net/batman-adv/fragmentation.c in the B.A.T.M.A.N.
    implementation in the Linux kernel through 3.18.1 uses an incorrect length field during a calculation of     an amount of memory, which allows remote attackers to cause a denial of service (mesh-node system crash)     via fragmented packets. (CVE-2014-9428)

  - Race condition in the key_gc_unused_keys function in security/keys/gc.c in the Linux kernel through 3.18.2     allows local users to cause a denial of service (memory corruption or panic) or possibly have unspecified     other impact via keyctl commands that trigger access to a key structure member during garbage collection     of a key. (CVE-2014-9529)

  - The parse_rock_ridge_inode_internal function in fs/isofs/rock.c in the Linux kernel before 3.18.2 does not     validate a length value in the Extensions Reference (ER) System Use Field, which allows local users to     obtain sensitive information from kernel memory via a crafted iso9660 image. (CVE-2014-9584)

  - The vdso_addr function in arch/x86/vdso/vma.c in the Linux kernel through 3.18.2 does not properly choose     memory locations for the vDSO area, which makes it easier for local users to bypass the ASLR protection     mechanism by guessing a location at the end of a PMD. (CVE-2014-9585)

  - Off-by-one error in the ecryptfs_decode_from_filename function in fs/ecryptfs/crypto.c in the eCryptfs     subsystem in the Linux kernel before 3.18.2 allows local users to cause a denial of service (buffer     overflow and system crash) or possibly gain privileges via a crafted filename. (CVE-2014-9683)

  - The em_sysenter function in arch/x86/kvm/emulate.c in the Linux kernel before 3.18.5, when the guest OS     lacks SYSENTER MSR initialization, allows guest OS users to gain guest OS privileges or cause a denial of     service (guest OS crash) by triggering use of a 16-bit code segment for emulation of a SYSENTER     instruction. (CVE-2015-0239)

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

The Linux kernel through 3.17.4 does not properly restrict dropping of supplemental group memberships in certain namespace scenarios, which allows local users to bypass intended file permissions by leveraging a POSIX ACL containing an entry for the group category that is more restrictive than the entry for the other category, aka a 'negative groups' issue, related to kernel/groups.c, kernel/uid16.c, and kernel/user_namespace.c. (CVE-2014-8989)

A flaw was found in the way the Linux kernel's splice() system call validated its parameters. On certain file systems, a local, unprivileged user could use this flaw to write past the maximum file size, and thus crash the system. (CVE-2014-7822)

The 3.17.8 stable update contains a number of important fixes across the tree.

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

ID	Name	Product	Family	Severity
127146	NewStart CGSL MAIN 5.04 : kernel Multiple Vulnerabilities (NS-SA-2019-0004)	Nessus	NewStart CGSL Local Security Checks	high
124974	EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1521)	Nessus	Huawei Local Security Checks	critical
99163	OracleVM 3.3 : Unbreakable / etc (OVMSA-2017-0057) (Dirty COW)	Nessus	OracleVM Local Security Checks	critical
88605	openSUSE Security Update : the Linux Kernel (openSUSE-2016-136)	Nessus	SuSE Local Security Checks	high
88545	openSUSE Security Update : the Linux Kernel (openSUSE-2016-124)	Nessus	SuSE Local Security Checks	high
85188	OracleVM 3.3 : kernel-uek (OVMSA-2015-0109)	Nessus	OracleVM Local Security Checks	critical
85177	Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2015-3064)	Nessus	Oracle Linux Local Security Checks	medium
81941	Mandriva Linux Security Advisory : kernel (MDVSA-2015:058)	Nessus	Mandriva Local Security Checks	high
81646	Ubuntu 14.04 LTS : Linux kernel vulnerabilities regression (USN-2516-3)	Nessus	Ubuntu Local Security Checks	medium
81645	Ubuntu 12.04 LTS : linux-lts-trusty vulnerabilities (USN-2515-2)	Nessus	Ubuntu Local Security Checks	medium
81590	Ubuntu 14.04 LTS : Linux kernel vulnerability regression (USN-2516-2)	Nessus	Ubuntu Local Security Checks	medium
81571	Ubuntu 14.10 : linux vulnerabilities (USN-2518-1)	Nessus	Ubuntu Local Security Checks	medium
81570	Ubuntu 14.04 LTS : Linux kernel (Utopic HWE) vulnerabilities (USN-2517-1)	Nessus	Ubuntu Local Security Checks	medium
81569	Ubuntu 14.04 LTS : Linux kernel vulnerabilities (USN-2516-1)	Nessus	Ubuntu Local Security Checks	medium
81568	Ubuntu 12.04 LTS : linux-lts-trusty vulnerabilities (USN-2515-1)	Nessus	Ubuntu Local Security Checks	medium
81322	Amazon Linux AMI : kernel (ALAS-2015-476)	Nessus	Amazon Linux Local Security Checks	high
80465	Fedora 20 : kernel-3.17.8-200.fc20 (2015-0515)	Nessus	Fedora Local Security Checks	high
80452	Fedora 21 : kernel-3.17.8-300.fc21 (2015-0517)	Nessus	Fedora Local Security Checks	high

Detections

Analytics

CVE-2014-8989

high

Tenable Plugins

high

critical

critical

high

high

critical

medium

high

medium

medium

medium

medium

medium

medium

medium

high

high

high