7.2 - USN-3083-1

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

- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description: - linux: Linux kernel

Details:

Dmitry Vyukov discovered that the IPv6 implementation in the Linux kernel did not properly handle options data, including a use-after-free. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2016-3841)

It was discovered that a race condition existed when handling heartbeat- timeout events in the SCTP implementation of the Linux kernel. A remote attacker could use this to cause a denial of service. (CVE-2015-8767)

Update instructions:

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

Ubuntu 14.04 LTS:
linux-image-3.13.0-96-generic 3.13.0-96.143
linux-image-3.13.0-96-generic-lpae 3.13.0-96.143
linux-image-3.13.0-96-lowlatency 3.13.0-96.143
linux-image-3.13.0-96-powerpc-e500 3.13.0-96.143
linux-image-3.13.0-96-powerpc-e500mc 3.13.0-96.143
linux-image-3.13.0-96-powerpc-smp 3.13.0-96.143
linux-image-3.13.0-96-powerpc64-emb 3.13.0-96.143
linux-image-3.13.0-96-powerpc64-smp 3.13.0-96.143

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:
http://www.ubuntu.com/usn/usn-3083-1
CVE-2015-8767, CVE-2016-3841

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.13.0-96.143