USN-3385-1: Linux kernel vulnerabilities

Releases

• Ubuntu 16.04 ESM

Packages

• linux - Linux kernel
• linux-aws - Linux kernel for Amazon Web Services (AWS) systems
• linux-gke - Linux kernel for Google Container Engine (GKE) systems
• linux-raspi2 - Linux kernel for Raspberry Pi 2
• linux-snapdragon - Linux kernel for Snapdragon processors

Details

Andrey Konovalov discovered a race condition in the UDP Fragmentation
Offload (UFO) code in the Linux kernel. A local attacker could use this to
cause a denial of service or execute arbitrary code. (CVE-2017-1000112)

Andrey Konovalov discovered a race condition in AF_PACKET socket option
handling code in the Linux kernel. A local unprivileged attacker could use
this to cause a denial of service or possibly execute arbitrary code.
(CVE-2017-1000111)

Update instructions

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

Ubuntu 16.04

• linux-image-4.4.0-1026-gke - 4.4.0-1026.26
• linux-image-4.4.0-1030-aws - 4.4.0-1030.39
• linux-image-4.4.0-1069-raspi2 - 4.4.0-1069.77
• linux-image-4.4.0-1071-snapdragon - 4.4.0-1071.76
• linux-image-4.4.0-91-generic - 4.4.0-91.114
• linux-image-4.4.0-91-generic-lpae - 4.4.0-91.114
• linux-image-4.4.0-91-lowlatency - 4.4.0-91.114
• linux-image-4.4.0-91-powerpc-e500mc - 4.4.0-91.114
• linux-image-4.4.0-91-powerpc-smp - 4.4.0-91.114
• linux-image-4.4.0-91-powerpc64-emb - 4.4.0-91.114
• linux-image-4.4.0-91-powerpc64-smp - 4.4.0-91.114

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

• CVE-2017-1000111
• CVE-2017-1000112

Related notices

• USN-3385-2: linux-lts-xenial, linux-image-4.4.0-91-powerpc64-smp, linux-image-4.4.0-91-generic, linux-image-4.4.0-91-powerpc-smp, linux-image-4.4.0-91-lowlatency, linux-image-4.4.0-91-powerpc-e500mc, linux-image-4.4.0-91-generic-lpae, linux-image-4.4.0-91-powerpc64-emb, linux-image-extra-4.4.0-91-generic
• USN-3386-1: linux-image-3.13.0-128-generic, linux-image-3.13.0-128-generic-lpae, linux-image-3.13.0-128-lowlatency, linux-image-3.13.0-128-powerpc-e500mc, linux-image-3.13.0-128-powerpc-e500, linux-image-3.13.0-128-powerpc-smp, linux-image-3.13.0-128-powerpc64-smp, linux-image-extra-3.13.0-128-generic, linux-image-3.13.0-128-powerpc64-emb, linux
• USN-3384-1: linux-image-4.10.0-32-generic, linux-image-4.10.0-1015-raspi2, linux-image-raspi2, linux-image-4.10.0-32-lowlatency, linux-raspi2, linux-image-4.10.0-32-generic-lpae, linux-image-generic, linux-image-lowlatency, linux-image-generic-lpae, linux
• USN-3386-2: linux-image-3.13.0-128-generic, linux-image-generic-lts-trusty, linux-image-3.13.0-128-generic-lpae, linux-lts-trusty, linux-image-generic-lpae-lts-trusty
• USN-3384-2: linux-image-extra-4.10.0-32-generic, linux-image-4.10.0-32-generic, linux-image-4.10.0-32-lowlatency, linux-image-4.10.0-32-generic-lpae, linux-hwe