USN-1225-1: Linux kernel vulnerabilities

4 October 2011

linux vulnerabilities

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

  • Ubuntu 8.04 LTS

Summary

Multiple kernel flaws have been fixed.

Software Description

  • linux - Linux kernel

Details

Timo Warns discovered that the EFI GUID partition table was not correctly parsed. A physically local attacker that could insert mountable devices could exploit this to crash the system or possibly gain root privileges. (CVE-2011-1776)

Dan Rosenberg discovered that the IPv4 diagnostic routines did not correctly validate certain requests. A local attacker could exploit this to consume CPU resources, leading to a denial of service. (CVE-2011-2213)

Dan Rosenberg discovered that the Bluetooth stack incorrectly handled certain L2CAP requests. If a system was using Bluetooth, a remote attacker could send specially crafted traffic to crash the system or gain root privileges. (CVE-2011-2497)

Fernando Gont discovered that the IPv6 stack used predictable fragment identification numbers. A remote attacker could exploit this to exhaust network resources, leading to a denial of service. (CVE-2011-2699)

Time Warns discovered that long symlinks were incorrectly handled on Be filesystems. A local attacker could exploit this with a malformed Be filesystem and crash the system, leading to a denial of service. (CVE-2011-2928)

Darren Lavender discovered that the CIFS client incorrectly handled certain large values. A remote attacker with a malicious server could exploit this to crash the system or possibly execute arbitrary code as the root user. (CVE-2011-3191)

Update instructions

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

Ubuntu 8.04 LTS
linux-image-2.6.24-29-386 - 2.6.24-29.94
linux-image-2.6.24-29-generic - 2.6.24-29.94
linux-image-2.6.24-29-hppa32 - 2.6.24-29.94
linux-image-2.6.24-29-hppa64 - 2.6.24-29.94
linux-image-2.6.24-29-itanium - 2.6.24-29.94
linux-image-2.6.24-29-lpia - 2.6.24-29.94
linux-image-2.6.24-29-lpiacompat - 2.6.24-29.94
linux-image-2.6.24-29-mckinley - 2.6.24-29.94
linux-image-2.6.24-29-openvz - 2.6.24-29.94
linux-image-2.6.24-29-powerpc - 2.6.24-29.94
linux-image-2.6.24-29-powerpc-smp - 2.6.24-29.94
linux-image-2.6.24-29-powerpc64-smp - 2.6.24-29.94
linux-image-2.6.24-29-rt - 2.6.24-29.94
linux-image-2.6.24-29-server - 2.6.24-29.94
linux-image-2.6.24-29-sparc64 - 2.6.24-29.94
linux-image-2.6.24-29-sparc64-smp - 2.6.24-29.94
linux-image-2.6.24-29-virtual - 2.6.24-29.94
linux-image-2.6.24-29-xen - 2.6.24-29.94

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