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USN-470-1: Linux kernel vulnerabilities

8 June 2007

Linux kernel vulnerabilities

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Releases

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)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

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

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

Related notices

  • USN-489-1: linux-image-2.6.15-28-server-bigiron, linux-image-2.6.15-28-sparc64, linux-image-2.6.15-28-amd64-server, linux-image-2.6.15-28-386, linux-image-2.6.15-28-mckinley, linux-image-2.6.15-28-amd64-k8, linux-image-2.6.15-28-amd64-generic, linux-image-2.6.15-28-amd64-xeon, linux-image-2.6.15-28-686, linux-image-2.6.15-28-powerpc64-smp, linux-image-2.6.15-28-sparc64-smp, linux-image-2.6.15-28-k7, linux-image-2.6.15-28-mckinley-smp, linux-image-2.6.15-28-powerpc-smp, linux-image-2.6.15-28-powerpc, linux-image-2.6.15-28-server
  • USN-486-1: linux-image-2.6.17-12-sparc64, linux-image-2.6.17-12-mckinley, linux-image-2.6.17-12-hppa32, linux-image-2.6.17-12-386, linux-image-2.6.17-12-sparc64-smp, linux-image-2.6.17-12-itanium, linux-image-2.6.17-12-powerpc, linux-image-2.6.17-12-powerpc-smp, linux-image-2.6.17-12-generic, linux-image-2.6.17-12-server, linux-image-2.6.17-12-hppa64, linux-image-2.6.17-12-powerpc64-smp, linux-image-2.6.17-12-server-bigiron