USN-3099-3: Linux kernel (Raspberry Pi 2) vulnerabilities

Ubuntu Security Notice USN-3099-3

11th October, 2016

linux-raspi2 vulnerabilities

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

• Ubuntu 16.04 LTS

Summary

Several security issues were fixed in the kernel.

Software description

• linux-raspi2 - Linux kernel for Raspberry Pi 2

Details

Vladimír Beneš discovered an unbounded recursion in the VLAN and TEB
Generic Receive Offload (GRO) processing implementations in the Linux
kernel, A remote attacker could use this to cause a stack corruption,
leading to a denial of service (system crash). (CVE-2016-7039)

Marco Grassi discovered a use-after-free condition could occur in the TCP
retransmit queue handling code in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2016-6828)

Pengfei Wang discovered a race condition in the Adaptec AAC RAID controller
driver in the Linux kernel when handling ioctl()s. A local attacker could
use this to cause a denial of service (system crash). (CVE-2016-6480)

Update instructions

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

Ubuntu 16.04 LTS:

linux-image-4.4.0-1027-raspi2 4.4.0-1027.33

To update your system, please follow these instructions: http://ift.tt/17VXqjU.

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-2016-6480, CVE-2016-6828, CVE-2016-7039

from Ubuntu Security Notices http://ift.tt/2dsAu23