USN-3206-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-3206-1

21st February, 2017

linux, linux-ti-omap4 vulnerabilities

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

Ubuntu 12.04 LTS

Summary

Several security issues were fixed in the kernel.

Software description

linux
– Linux kernel
linux-ti-omap4
– Linux kernel for OMAP4

Details

It was discovered that a use-after-free vulnerability existed in the block
device layer of the Linux kernel. A local attacker could use this to cause
a denial of service (system crash) or possibly gain administrative
privileges. (CVE-2016-7910)

Dmitry Vyukov discovered a use-after-free vulnerability in the
sys_ioprio_get() function in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly gain
administrative privileges. (CVE-2016-7911)

Andrey Konovalov discovered a use-after-free vulnerability in the DCCP
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly gain administrative
privileges. (CVE-2017-6074)

Update instructions

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

Ubuntu 12.04 LTS:: linux-image-3.2.0-1501-omap4

3.2.0-1501.128; linux-image-powerpc-smp 3.2.0.123.138; linux-image-3.2.0-123-powerpc64-smp

3.2.0-123.166; linux-image-3.2.0-123-generic-pae

3.2.0-123.166; linux-image-3.2.0-123-highbank

3.2.0-123.166; linux-image-3.2.0-123-generic

3.2.0-123.166; linux-image-omap4 3.2.0.1501.96; linux-image-3.2.0-123-virtual

3.2.0-123.166; linux-image-generic 3.2.0.123.138; linux-image-generic-pae 3.2.0.123.138; linux-image-highbank 3.2.0.123.138; linux-image-3.2.0-123-powerpc-smp

3.2.0-123.166; linux-image-virtual 3.2.0.123.138; linux-image-powerpc64-smp 3.2.0.123.138; linux-image-omap 3.2.0.123.138; linux-image-3.2.0-123-omap

3.2.0-123.166

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-2016-7910,

CVE-2016-7911,

CVE-2017-6074

Source: USN-3206-1: Linux kernel vulnerabilities

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