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AUSCERT External Security Bulletin Redistribution
ESB-2013.0283
linux-2.6 security update
27 February 2013
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AusCERT Security Bulletin Summary
---------------------------------
Product: linux-2.6
Publisher: Debian
Operating System: Debian GNU/Linux 6
Linux variants
Impact/Access: Increased Privileges -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2013-0871 CVE-2013-0231
Original Bulletin:
http://www.debian.org/security/2013/dsa-2632
Comment: This advisory references vulnerabilities in the Linux kernel that
also affect distributions other than Debian. It is recommended that
administrators running Linux check for an updated version of the
kernel for their system.
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Debian Security Advisory DSA-2632-1 security@debian.org
http://www.debian.org/security/ Dann Frazier
February 25, 2013 http://www.debian.org/security/faq
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Package : linux-2.6
Vulnerability : privilege escalation/denial of service
Problem type : local
Debian-specific: no
CVE Id(s) : CVE-2013-0231 CVE-2013-0871
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.
Thanks to Micah Anderson for proof reading this text.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org
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