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USN-3146-1: Linux kernel vulnerabilities

30 November 2016

Several security issues were fixed in the kernel.

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Packages

Details

It was discovered that the __get_user_asm_ex implementation in the Linux
kernel for x86/x86_64 contained extended asm statements that were
incompatible with the exception table. A local attacker could use this to
gain administrative privileges. (CVE-2016-9644)

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)

Marco Grassi discovered that the driver for Areca RAID Controllers in the
Linux kernel did not properly validate control messages. A local attacker
could use this to cause a denial of service (system crash) or possibly gain
privileges. (CVE-2016-7425)

Daxing Guo discovered a stack-based buffer overflow in the Broadcom
IEEE802.11n FullMAC driver in the Linux kernel. A local attacker could use
this to cause a denial of service (system crash) or possibly gain
privileges. (CVE-2016-8658)

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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 16.04

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-3162-2: linux-image-4.8.0-1021-raspi2, linux-image-raspi2, linux-raspi2
  • USN-3161-4: linux-snapdragon, linux-image-4.4.0-1042-snapdragon
  • USN-3161-3: linux-raspi2, linux-image-4.4.0-1038-raspi2
  • USN-3146-2: linux-image-4.4.0-51-lowlatency, linux-image-4.4.0-51-powerpc-smp, linux-image-4.4.0-51-generic, linux-image-4.4.0-51-generic-lpae, linux-image-4.4.0-51-powerpc64-emb, linux-image-4.4.0-51-powerpc64-smp, linux-lts-xenial, linux-image-4.4.0-51-powerpc-e500mc, linux-image-extra-4.4.0-51-generic
  • USN-3422-2: linux-image-generic-lts-trusty, linux-image-3.13.0-132-generic-lpae, linux-image-3.13.0-132-generic, linux-lts-trusty, linux-image-generic-lpae-lts-trusty
  • USN-3422-1: linux, linux-image-3.13.0-132-powerpc64-emb, linux-image-3.13.0-132-lowlatency, linux-image-3.13.0-132-powerpc-e500mc, linux-image-3.13.0-132-powerpc64-smp, linux-image-3.13.0-132-powerpc-e500, linux-image-3.13.0-132-generic-lpae, linux-image-extra-3.13.0-132-generic, linux-image-3.13.0-132-powerpc-smp, linux-image-3.13.0-132-generic
  • USN-3147-1: linux-image-4.8.0-28-powerpc-e500mc, linux-image-powerpc64-emb, linux, linux-image-4.8.0-28-generic, linux-image-4.8.0-28-powerpc-smp, linux-image-generic, linux-image-lowlatency, linux-image-powerpc-smp, linux-image-4.8.0-28-powerpc64-emb, linux-image-4.8.0-28-lowlatency, linux-image-powerpc-e500mc, linux-image-4.8.0-28-generic-lpae, linux-image-generic-lpae
  • USN-3144-1: linux-image-3.2.0-116-powerpc64-smp, linux-image-3.2.0-116-omap, linux, linux-image-highbank, linux-image-3.2.0-116-generic-pae, linux-image-generic, linux-image-3.2.0-116-highbank, linux-image-omap, linux-image-powerpc64-smp, linux-image-3.2.0-116-powerpc-smp, linux-image-powerpc-smp, linux-image-virtual, linux-image-3.2.0-116-generic, linux-image-3.2.0-116-virtual, linux-image-generic-pae
  • USN-3145-1: linux-image-3.13.0-103-powerpc64-smp, linux, linux-image-3.13.0-103-generic-lpae, linux-image-3.13.0-103-powerpc-e500, linux-image-3.13.0-103-powerpc64-emb, linux-image-3.13.0-103-lowlatency, linux-image-3.13.0-103-powerpc-smp, linux-image-3.13.0-103-generic, linux-image-extra-3.13.0-103-generic, linux-image-3.13.0-103-powerpc-e500mc
  • USN-3145-2: linux-image-generic-lts-trusty, linux-image-3.13.0-103-generic-lpae, linux-image-3.13.0-103-generic, linux-lts-trusty, linux-image-generic-lpae-lts-trusty
  • USN-3144-2: linux-ti-omap4, linux-image-omap4, linux-image-3.2.0-1494-omap4

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