USN-3385-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-3385-1

10th August, 2017

linux, linux-aws, linux-gke, linux-raspi2, linux-snapdragon vulnerabilities

A security issue affects these releases of Ubuntu and its
derivatives:

Ubuntu 16.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software description

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 version:

Ubuntu 16.04 LTS:: linux-image-powerpc-e500mc 4.4.0.91.96; linux-image-4.4.0-91-powerpc-e500mc

4.4.0-91.114; linux-image-4.4.0-91-lowlatency

4.4.0-91.114; linux-image-4.4.0-91-powerpc-smp

4.4.0-91.114; linux-image-4.4.0-91-generic-lpae

4.4.0-91.114; linux-image-4.4.0-1026-gke

4.4.0-1026.26; linux-image-snapdragon 4.4.0.1071.63; linux-image-powerpc64-emb 4.4.0.91.96; linux-image-gke 4.4.0.1026.27; linux-image-4.4.0-1030-aws

4.4.0-1030.39; linux-image-4.4.0-91-powerpc64-emb

4.4.0-91.114; linux-image-generic 4.4.0.91.96; linux-image-4.4.0-91-generic

4.4.0-91.114; linux-image-aws 4.4.0.1030.32; linux-image-raspi2 4.4.0.1069.69; linux-image-powerpc-smp 4.4.0.91.96; linux-image-4.4.0-91-powerpc64-smp

4.4.0-91.114; linux-image-generic-lpae 4.4.0.91.96; 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-powerpc64-smp 4.4.0.91.96; linux-image-lowlatency 4.4.0.91.96

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

Source: USN-3385-1: Linux kernel vulnerabilities

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