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USN-3422-1: Linux kernel vulnerabilities

18 September 2017

Several security issues were fixed in the Linux kernel.

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Details

It was discovered that a buffer overflow existed in the Bluetooth stack of
the Linux kernel when handling L2CAP configuration responses. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2017-1000251)

It was discovered that the asynchronous I/O (aio) subsystem of the Linux
kernel did not properly set permissions on aio memory mappings in some
situations. An attacker could use this to more easily exploit other
vulnerabilities. (CVE-2016-10044)

Baozeng Ding and Andrey Konovalov discovered a race condition in the L2TPv3
IP Encapsulation 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-2016-10200)

Andreas Gruenbacher and Jan Kara discovered that the filesystem
implementation in the Linux kernel did not clear the setgid bit during a
setxattr call. A local attacker could use this to possibly elevate group
privileges. (CVE-2016-7097)

Sergej Schumilo, Ralf Spenneberg, and Hendrik Schwartke discovered that the
key management subsystem in the Linux kernel did not properly allocate
memory in some situations. A local attacker could use this to cause a
denial of service (system crash). (CVE-2016-8650)

Vlad Tsyrklevich discovered an integer overflow vulnerability in the VFIO
PCI driver for the Linux kernel. A local attacker with access to a vfio PCI
device file could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2016-9083, CVE-2016-9084)

It was discovered that an information leak existed in __get_user_asm_ex()
in the Linux kernel. A local attacker could use this to expose sensitive
information. (CVE-2016-9178)

CAI Qian discovered that the sysctl implementation in the Linux kernel did
not properly perform reference counting in some situations. An unprivileged
attacker could use this to cause a denial of service (system hang).
(CVE-2016-9191)

It was discovered that the keyring implementation in the Linux kernel in
some situations did not prevent special internal keyrings from being joined
by userspace keyrings. A privileged local attacker could use this to bypass
module verification. (CVE-2016-9604)

It was discovered that an integer overflow existed in the trace subsystem
of the Linux kernel. A local privileged attacker could use this to cause a
denial of service (system crash). (CVE-2016-9754)

Andrey Konovalov discovered that the IPv4 implementation in the Linux
kernel did not properly handle invalid IP options in some situations. An
attacker could use this to cause a denial of service or possibly execute
arbitrary code. (CVE-2017-5970)

Dmitry Vyukov discovered that the Linux kernel did not properly handle TCP
packets with the URG flag. A remote attacker could use this to cause a
denial of service. (CVE-2017-6214)

It was discovered that a race condition existed in the AF_PACKET handling
code in the Linux kernel. A local attacker could use this to cause a denial
of service (system crash) or possibly execute arbitrary code.
(CVE-2017-6346)

It was discovered that the keyring implementation in the Linux kernel did
not properly restrict searches for dead keys. A local attacker could use
this to cause a denial of service (system crash). (CVE-2017-6951)

Dmitry Vyukov discovered that the generic SCSI (sg) subsystem in the Linux
kernel contained a stack-based buffer overflow. A local attacker with
access to an sg device could use this to cause a denial of service (system
crash) or possibly execute arbitrary code. (CVE-2017-7187)

Eric Biggers discovered a memory leak in the keyring implementation in the
Linux kernel. A local attacker could use this to cause a denial of service
(memory consumption). (CVE-2017-7472)

It was discovered that a buffer overflow existed in the Broadcom FullMAC
WLAN driver in the Linux kernel. A local attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2017-7541)

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 14.04

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

Related notices

  • USN-3422-2: linux-image-3.13.0-132-generic, linux-lts-trusty, linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-132-generic-lpae, linux-image-generic-lts-trusty
  • USN-3162-2: linux-raspi2, linux-image-raspi2, linux-image-4.8.0-1021-raspi2
  • USN-3161-4: linux-image-4.4.0-1042-snapdragon, linux-snapdragon
  • USN-3161-3: linux-raspi2, linux-image-4.4.0-1038-raspi2
  • USN-3146-2: linux-image-4.4.0-51-powerpc-e500mc, linux-lts-xenial, linux-image-4.4.0-51-powerpc64-smp, linux-image-4.4.0-51-generic-lpae, linux-image-extra-4.4.0-51-generic, linux-image-4.4.0-51-powerpc64-emb, linux-image-4.4.0-51-lowlatency, linux-image-4.4.0-51-generic, linux-image-4.4.0-51-powerpc-smp
  • USN-3146-1: linux-image-4.4.0-51-powerpc-e500mc, linux, linux-image-4.4.0-51-powerpc64-smp, linux-image-4.4.0-51-generic-lpae, linux-image-extra-4.4.0-51-generic, linux-image-4.4.0-51-powerpc64-emb, linux-image-4.4.0-51-lowlatency, linux-image-4.4.0-51-generic, linux-image-4.4.0-51-powerpc-smp
  • USN-3147-1: linux-image-4.8.0-28-lowlatency, linux-image-powerpc-smp, linux-image-powerpc-e500mc, linux-image-generic, linux-image-4.8.0-28-powerpc-e500mc, linux, linux-image-4.8.0-28-powerpc-smp, linux-image-generic-lpae, linux-image-4.8.0-28-powerpc64-emb, linux-image-4.8.0-28-generic, linux-image-lowlatency, linux-image-4.8.0-28-generic-lpae, linux-image-powerpc64-emb
  • USN-3361-1: linux-image-4.10.0-27-generic, linux-image-4.10.0-27-lowlatency, linux-image-extra-4.10.0-27-generic, linux-image-4.10.0-27-generic-lpae, linux-hwe
  • USN-3312-2: linux-image-extra-4.4.0-79-generic, linux-lts-xenial, linux-image-4.4.0-79-powerpc-smp, linux-image-4.4.0-79-lowlatency, linux-image-4.4.0-79-powerpc64-emb, linux-image-4.4.0-79-generic-lpae, linux-image-4.4.0-79-powerpc-e500mc, linux-image-4.4.0-79-powerpc64-smp, linux-image-4.4.0-79-generic
  • USN-3312-1: linux-image-extra-4.4.0-79-generic, linux-raspi2, linux-snapdragon, linux-image-4.4.0-79-powerpc-smp, linux, linux-image-4.4.0-79-lowlatency, linux-image-4.4.0-79-powerpc64-emb, linux-image-4.4.0-79-generic-lpae, linux-image-4.4.0-79-powerpc-e500mc, linux-image-4.4.0-1014-gke, linux-image-extra-4.4.0-1014-gke, linux-aws, linux-image-4.4.0-79-powerpc64-smp, linux-image-4.4.0-1059-snapdragon, linux-image-4.4.0-79-generic, linux-image-4.4.0-1018-aws, linux-image-4.4.0-1057-raspi2, linux-gke
  • USN-3208-1: linux-image-4.4.0-64-lowlatency, linux-snapdragon, linux, linux-image-4.4.0-1048-snapdragon, linux-image-4.4.0-64-generic, linux-image-4.4.0-64-powerpc64-smp, linux-image-4.4.0-64-powerpc-smp, linux-image-4.4.0-64-generic-lpae, linux-image-4.4.0-64-powerpc-e500mc, linux-image-4.4.0-64-powerpc64-emb, linux-image-extra-4.4.0-64-generic
  • USN-3208-2: linux-image-4.4.0-64-lowlatency, linux-lts-xenial, linux-image-4.4.0-64-generic, linux-image-4.4.0-64-powerpc64-smp, linux-image-4.4.0-64-powerpc-smp, linux-image-4.4.0-64-generic-lpae, linux-image-4.4.0-64-powerpc-e500mc, linux-image-4.4.0-64-powerpc64-emb, linux-image-extra-4.4.0-64-generic
  • USN-3314-1: linux-image-4.10.0-22-lowlatency, linux-image-4.10.0-1006-raspi2, linux-image-generic, linux, linux-image-generic-lpae, linux-image-4.10.0-22-generic, linux-image-lowlatency, linux-image-4.10.0-22-generic-lpae, linux-image-raspi2, linux-raspi2
  • USN-3423-1: linux-image-powerpc-smp, linux-image-omap, linux-image-3.2.0-131-powerpc-smp, linux-image-generic, linux-image-virtual, linux, linux-image-generic-pae, linux-image-powerpc64-smp, linux-image-highbank, linux-image-3.2.0-131-generic, linux-image-3.2.0-131-virtual, linux-image-3.2.0-131-highbank, linux-image-3.2.0-131-omap, linux-image-3.2.0-131-generic-pae, linux-image-3.2.0-131-powerpc64-smp
  • USN-3419-1: linux-image-generic, linux-raspi2, linux, linux-image-generic-lpae, linux-image-4.10.0-35-generic-lpae, linux-image-4.10.0-35-lowlatency, linux-image-lowlatency, linux-image-raspi2, linux-image-4.10.0-35-generic, linux-image-4.10.0-1018-raspi2
  • USN-3420-1: linux-kvm, linux-image-4.4.0-96-generic, linux-image-4.4.0-96-powerpc-e500mc, linux-aws, linux-image-4.4.0-1074-raspi2, linux-image-4.4.0-1035-aws, linux-image-extra-4.4.0-1031-gke, linux-snapdragon, linux-image-4.4.0-1007-kvm, linux-raspi2, linux-image-4.4.0-1031-gke, linux-image-4.4.0-96-powerpc-smp, linux, linux-image-4.4.0-96-powerpc64-emb, linux-image-4.4.0-1076-snapdragon, linux-image-4.4.0-96-lowlatency, linux-image-extra-4.4.0-96-generic, linux-image-4.4.0-96-generic-lpae, linux-image-4.4.0-96-powerpc64-smp, linux-gke
  • USN-3420-2: linux-image-4.4.0-96-powerpc-smp, linux-image-4.4.0-96-generic, linux-image-4.4.0-96-powerpc-e500mc, linux-lts-xenial, linux-image-4.4.0-96-powerpc64-emb, linux-image-4.4.0-96-lowlatency, linux-image-extra-4.4.0-96-generic, linux-image-4.4.0-96-generic-lpae, linux-image-4.4.0-96-powerpc64-smp
  • USN-3419-2: linux-image-4.10.0-35-generic-lpae, linux-image-4.10.0-35-lowlatency, linux-image-4.10.0-35-generic, linux-image-extra-4.10.0-35-generic, linux-hwe
  • USN-3265-1: linux-image-4.4.0-75-powerpc64-emb, linux-image-4.4.0-75-powerpc64-smp, linux-image-4.4.0-75-lowlatency, linux-snapdragon, linux-image-4.4.0-1016-aws, linux, linux-image-extra-4.4.0-1012-gke, linux-image-4.4.0-75-generic, linux-image-4.4.0-75-powerpc-e500mc, linux-image-4.4.0-1054-raspi2, linux-image-4.4.0-1012-gke, linux-image-4.4.0-1057-snapdragon, linux-image-extra-4.4.0-75-generic, linux-aws, linux-raspi2, linux-image-4.4.0-75-powerpc-smp, linux-gke, linux-image-4.4.0-75-generic-lpae
  • USN-3265-2: linux-image-4.4.0-75-powerpc64-emb, linux-image-4.4.0-75-lowlatency, linux-lts-xenial, linux-image-4.4.0-75-generic, linux-image-4.4.0-75-powerpc-e500mc, linux-image-extra-4.4.0-75-generic, linux-image-4.4.0-75-powerpc-smp, linux-image-4.4.0-75-powerpc64-smp, linux-image-4.4.0-75-generic-lpae
  • USN-3291-3: linux-lts-xenial, linux-image-4.4.0-78-generic, linux-image-4.4.0-78-powerpc64-smp, linux-image-4.4.0-78-powerpc64-emb, linux-image-4.4.0-78-powerpc-e500mc, linux-image-extra-4.4.0-78-generic, linux-image-4.4.0-78-lowlatency, linux-image-4.4.0-78-generic-lpae, linux-image-4.4.0-78-powerpc-smp
  • USN-3291-1: linux-image-4.4.0-78-powerpc-smp, linux-image-4.4.0-78-generic, linux, linux-image-4.4.0-78-powerpc64-smp, linux-image-4.4.0-78-powerpc64-emb, linux-image-4.4.0-78-powerpc-e500mc, linux-image-extra-4.4.0-78-generic, linux-image-4.4.0-78-lowlatency, linux-image-4.4.0-78-generic-lpae
  • USN-3293-1: linux-image-4.10.0-21-generic, linux-image-4.10.0-1005-raspi2, linux-image-generic, linux, linux-image-generic-lpae, linux-image-4.10.0-21-generic-lpae, linux-image-lowlatency, linux-image-raspi2, linux-raspi2, linux-image-4.10.0-21-lowlatency
  • USN-3291-2: linux-snapdragon, linux-image-4.4.0-1055-raspi2, linux-image-4.4.0-1013-gke, linux-aws, linux-image-extra-4.4.0-1013-gke, linux-image-4.4.0-1017-aws, linux-image-4.4.0-1058-snapdragon, linux-raspi2, linux-gke
  • USN-3405-1: linux-raspi2, linux-snapdragon, linux-image-extra-4.4.0-1028-gke, linux, linux-image-4.4.0-1073-snapdragon, linux-image-extra-4.4.0-93-generic, linux-image-4.4.0-93-powerpc64-smp, linux-image-4.4.0-1071-raspi2, linux-image-4.4.0-1032-aws, linux-image-4.4.0-93-lowlatency, linux-image-4.4.0-1028-gke, linux-aws, linux-image-4.4.0-93-generic, linux-image-4.4.0-93-generic-lpae, linux-image-4.4.0-93-powerpc-smp, linux-image-4.4.0-93-powerpc-e500mc, linux-image-4.4.0-93-powerpc64-emb, linux-gke
  • USN-3405-2: linux-lts-xenial, linux-image-extra-4.4.0-93-generic, linux-image-4.4.0-93-powerpc64-smp, linux-image-4.4.0-93-lowlatency, linux-image-4.4.0-93-generic-lpae, linux-image-4.4.0-93-generic, linux-image-4.4.0-93-powerpc-smp, linux-image-4.4.0-93-powerpc-e500mc, linux-image-4.4.0-93-powerpc64-emb

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