Debian DSA-2632-1 : linux-2.6 - privilege escalation/denial of service
Medium Nessus Plugin ID 64881
SynopsisThe remote Debian host is missing a security-related update.
DescriptionSeveral 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.
SolutionUpgrade the linux-2.6 and user-mode-linux packages.
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