Debian Security Advisory

DSA-2632-1 linux-2.6 -- privilege escalation/denial of service

Date Reported:
25 Feb 2013
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2013-0231, CVE-2013-0871.
More information:

Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or privilege escalation. The Common Vulnerabilities and Exposures project identifies the following problems:

  • CVE-2013-0231

    Jan Beulich provided a fix for an issue in the Xen PCI backend drivers. Users of guests on a system using passed-through PCI devices can create a denial of service of the host system due to the use of non-ratelimited kernel log messages.

  • CVE-2013-0871

    Suleiman Souhlal and Salman Qazi of Google, with help from Aaron Durbin and Michael Davidson of Google, discovered an issue in the ptrace subsystem. Due to a race condition with PTRACE_SETREGS, local users can cause kernel stack corruption and execution of arbitrary code.

For the stable distribution (squeeze), this problem has been fixed in version 2.6.32-48squeeze1.

The following matrix lists additional source packages that were rebuilt for compatibility with or to take advantage of this update:

  Debian 6.0 (squeeze)
user-mode-linux 2.6.32-1um-4+48squeeze1

We recommend that you upgrade your linux-2.6 and user-mode-linux packages.