USN-1362-1: Linux kernel vulnerabilities

13 February 2012

linux vulnerabilities

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

  • Ubuntu 11.04

Summary

Several security issues were fixed in the kernel.

Software Description

  • linux - Linux kernel

Details

Han-Wen Nienhuys reported a flaw in the FUSE kernel module. A local user who can mount a FUSE file system could cause a denial of service. (CVE-2011-3353)

A flaw was found in KVM’s Programmable Interval Timer (PIT). When a virtual interrupt control is not available a local user could use this to cause a denial of service by starting a timer. (CVE-2011-4622)

A flaw was discovered in the XFS filesystem. If a local user mounts a specially crafted XFS image it could potential execute arbitrary code on the system. (CVE-2012-0038)

Chen Haogang discovered an integer overflow that could result in memory corruption. A local unprivileged user could use this to crash the system. (CVE-2012-0044)

Update instructions

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

Ubuntu 11.04
linux-image-2.6.38-13-generic - 2.6.38-13.55
linux-image-2.6.38-13-generic-pae - 2.6.38-13.55
linux-image-2.6.38-13-omap - 2.6.38-13.55
linux-image-2.6.38-13-powerpc - 2.6.38-13.55
linux-image-2.6.38-13-powerpc-smp - 2.6.38-13.55
linux-image-2.6.38-13-powerpc64-smp - 2.6.38-13.55
linux-image-2.6.38-13-server - 2.6.38-13.55
linux-image-2.6.38-13-versatile - 2.6.38-13.55
linux-image-2.6.38-13-virtual - 2.6.38-13.55

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.

References