[USN-3445-2] Linux kernel vulnerabilities

[Steve Beattie]

==========================================================================
Ubuntu Security Notice USN-3445-2
October 11, 2017

linux vulnerabilities
==========================================================================

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

- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel

Details:

USN-3445-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu
12.04 ESM.

Eyal Itkin discovered that the IP over IEEE 1394 (FireWire) implementation
in the Linux kernel contained a buffer overflow when handling fragmented
packets. A remote attacker could use this to possibly execute arbitrary
code with administrative privileges. (CVE-2016-8633)

Andrey Konovalov discovered that a divide-by-zero error existed in the TCP
stack implementation in the Linux kernel. A local attacker could use this
to cause a denial of service (system crash). (CVE-2017-14106)

Update instructions:

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

Ubuntu 12.04 ESM:
  linux-image-3.2.0-131-generic   3.2.0-131.177
  linux-image-3.2.0-131-generic-pae  3.2.0-131.177
  linux-image-3.2.0-131-highbank  3.2.0-131.177
  linux-image-3.2.0-131-omap      3.2.0-131.177
  linux-image-3.2.0-131-powerpc-smp  3.2.0-131.177
  linux-image-3.2.0-131-powerpc64-smp  3.2.0-131.177
  linux-image-3.2.0-131-virtual   3.2.0-131.177
  linux-image-generic             3.2.0.131.145
  linux-image-generic-pae         3.2.0.131.145
  linux-image-highbank            3.2.0.131.145
  linux-image-omap                3.2.0.131.145
  linux-image-powerpc-smp         3.2.0.131.145
  linux-image-powerpc64-smp       3.2.0.131.145

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:
  https://www.ubuntu.com/usn/usn-3445-2
  https://www.ubuntu.com/usn/usn-3445-1
  CVE-2016-8633, CVE-2017-14106

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