USN-470-1: Linux kernel vulnerabilities

8 June 2007

linux-source-2.6.20 vulnerabilities

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

  • Ubuntu 7.04

Software Description

Details

USN-464-1 fixed several vulnerabilities in the Linux kernel. Some additional code changes were accidentally included in the Feisty update which caused trouble for some people who were not using UUID-based filesystem mounts. These changes have been reverted. We apologize for the inconvenience. For more information see: https://launchpad.net/bugs/117314 https://wiki.ubuntu.com/UsingUUID

Ilja van Sprundel discovered that Bluetooth setsockopt calls could leak kernel memory contents via an uninitialized stack buffer. A local attacker could exploit this flaw to view sensitive kernel information. (CVE-2007-1353)

The GEODE-AES driver did not correctly initialize its encryption key. Any data encrypted using this type of device would be easily compromised. (CVE-2007-2451)

The random number generator was hashing a subset of the available entropy, leading to slightly less random numbers. Additionally, systems without an entropy source would be seeded with the same inputs at boot time, leading to a repeatable series of random numbers. (CVE-2007-2453)

Update instructions

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

Ubuntu 7.04
linux-image-2.6.20-16-386 - 2.6.20-16.29
linux-image-2.6.20-16-generic - 2.6.20-16.29
linux-image-2.6.20-16-hppa32 - 2.6.20-16.29
linux-image-2.6.20-16-hppa64 - 2.6.20-16.29
linux-image-2.6.20-16-itanium - 2.6.20-16.29
linux-image-2.6.20-16-lowlatency - 2.6.20-16.29
linux-image-2.6.20-16-mckinley - 2.6.20-16.29
linux-image-2.6.20-16-powerpc - 2.6.20-16.29
linux-image-2.6.20-16-powerpc-smp - 2.6.20-16.29
linux-image-2.6.20-16-powerpc64-smp - 2.6.20-16.29
linux-image-2.6.20-16-server - 2.6.20-16.29
linux-image-2.6.20-16-server-bigiron - 2.6.20-16.29
linux-image-2.6.20-16-sparc64 - 2.6.20-16.29
linux-image-2.6.20-16-sparc64-smp - 2.6.20-16.29

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

After a standard system upgrade you need to reboot your computer to effect the necessary changes.

References