USN-1293-1: Linux kernel vulnerabilities

8 December 2011

linux vulnerabilities

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

  • Ubuntu 10.10

Summary

Several security issues were fixed in the kernel.

Software Description

  • linux - Linux kernel

Details

A bug was discovered in the XFS filesystem’s handling of pathnames. A local attacker could exploit this to crash the system, leading to a denial of service, or gain root privileges. (CVE-2011-4077)

Nick Bowler discovered the kernel GHASH message digest algorithm incorrectly handled error conditions. A local attacker could exploit this to cause a kernel oops. (CVE-2011-4081)

A flaw was found in the Journaling Block Device (JBD). A local attacker able to mount ext3 or ext4 file systems could exploit this to crash the system, leading to a denial of service. (CVE-2011-4132)

A bug was found in the way headroom check was performed in udp6_ufo_fragment() function. A remote attacker could use this flaw to crash the system. (CVE-2011-4326)

Clement Lecigne discovered a bug in the HFS file system bounds checking. When a malformed HFS file system is mounted a local user could crash the system or gain root privileges. (CVE-2011-4330)

Update instructions

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

Ubuntu 10.10
linux-image-2.6.35-31-generic - 2.6.35-31.63
linux-image-2.6.35-31-generic-pae - 2.6.35-31.63
linux-image-2.6.35-31-omap - 2.6.35-31.63
linux-image-2.6.35-31-powerpc - 2.6.35-31.63
linux-image-2.6.35-31-powerpc-smp - 2.6.35-31.63
linux-image-2.6.35-31-powerpc64-smp - 2.6.35-31.63
linux-image-2.6.35-31-server - 2.6.35-31.63
linux-image-2.6.35-31-versatile - 2.6.35-31.63
linux-image-2.6.35-31-virtual - 2.6.35-31.63

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