1. Ubuntu Security Notices
  2. USN-1275-1

USN-1275-1: Linux kernel vulnerability

Publication date

21 November 2011

Overview

The system could be made to expose sensitive information locally.

Releases

Packages

Details

Peter Huewe discovered an information leak in the handling of reading
security-related TPM data. A local, unprivileged user could read the
results of a previous TPM command. (CVE-2011-1162)

Vasiliy Kulikov discovered that taskstats did not enforce access
restrictions. A local attacker could exploit this to read certain
information, leading to a loss of privacy. (CVE-2011-2494)

Mathieu Desnoyers discovered that the kernel sockets implementation
incorrectly dereferenced user pointers. A local attacker could possibly
exploit this to crash the system. (CVE-2011-4594)

Peter Huewe discovered an information leak in the handling of reading
security-related TPM data. A local, unprivileged user could read the
results of a previous TPM command. (CVE-2011-1162)

Vasiliy Kulikov discovered that taskstats did not enforce access
restrictions. A local attacker could exploit this to read certain
information, leading to a loss of privacy. (CVE-2011-2494)

Mathieu Desnoyers discovered that the kernel sockets implementation
incorrectly dereferenced user pointers. A local attacker could possibly
exploit this to crash the system. (CVE-2011-4594)

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. If you use linux-restricted-modules, you have to update that package as well to get modules which work with the new kernel version. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-server, linux-powerpc), a standard system upgrade will automatically perform this as well.

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

Ubuntu Release Package Version
11.10 oneiric linux-image-3.0.0-13-powerpc –  3.0.0-13.22
linux-image-3.0.0-13-omap –  3.0.0-13.22
linux-image-3.0.0-13-generic-pae –  3.0.0-13.22
linux-image-3.0.0-13-powerpc64-smp –  3.0.0-13.22
linux-image-3.0.0-13-server –  3.0.0-13.22
linux-image-3.0.0-13-generic –  3.0.0-13.22
linux-image-3.0.0-13-virtual –  3.0.0-13.22
linux-image-3.0.0-13-powerpc-smp –  3.0.0-13.22

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References

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