USN-2239-1: Linux kernel (Saucy HWE) vulnerabilities

5 June 2014

linux-lts-saucy 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-lts-saucy - Linux hardware enablement kernel from Saucy

Details

Pinkie Pie discovered a flaw in the Linux kernel’s futex subsystem. An unprivileged local user could exploit this flaw to cause a denial of service (system crash) or gain administrative privileges. (CVE-2014-3153)

A flaw was discovered in the Linux kernel virtual machine’s (kvm) validation of interrupt requests (irq). A guest OS user could exploit this flaw to cause a denial of service (host OS crash). (CVE-2014-0155)

An information leak was discovered in the netfilter subsystem of the Linux kernel. An attacker could exploit this flaw to obtain sensitive information from kernel memory. (CVE-2014-2568)

Sasha Levin reported a bug in the Linux kernel’s virtual memory management subsystem. An unprivileged local user could exploit this flaw to cause a denial of service (system crash). (CVE-2014-3122)

Hannes Frederic Sowa reported a hash collision ordering problem in the xfs filesystem in the Linux kernel. A local user could exploit this flaw to cause filesystem corruption and a denial of service (oops or panic). (CVE-2014-7283)

Update instructions

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

Ubuntu 12.04 LTS
linux-image-3.11.0-23-generic - 3.11.0-23.40~precise1
linux-image-3.11.0-23-generic-lpae - 3.11.0-23.40~precise1

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. If you use linux-restricted-modules, you have to update that package as well to get modules which work with the new kernel version. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-server, linux-powerpc), a standard system upgrade will automatically perform this as well.

References