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Debian: Security update for libxml2

Many security problems had been fixed in libxml2, a popular library to handle XML data files. Jüri Aedla discovered a heap-based buffer overflow that allows remote attackers to cause a denial of service or possibly have unspecified other impact via unknown vectors. An Off-by-one error have been discoveried that allows remote attackers to execute arbitrary code or cause a denial of service. A memory corruption (double free) bug has been identified in libxml2’s XPath engine. Through it, it is possible to an attacker allows cause a denial of service or possibly have unspecified other impact. Yang Dingning discovered a double free vulnerability related to XPath handling. An out-of-bounds read vulnerability had been discovered, which allows remote attackers to cause a denial of service.

Updated packages are available from security.debian.org.

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- -------------------------------------------------------------------------
Debian Security Advisory DSA-2394-1                   security@debian.org
http://www.debian.org/security/                             Luciano Bello
January 27, 2012                       http://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package        : libxml2
Vulnerability  : several
Problem type   : remote
Debian-specific: no
CVE ID         : CVE-2011-0216 CVE-2011-2821 CVE-2011-2834 CVE-2011-3905 
                CVE-2011-3919 
Debian Bug     : 652352 643648 656377

Many security problems had been fixed in libxml2, a popular library to handle
XML data files.

CVE-2011-3919:
Jüri Aedla discovered a heap-based buffer overflow that allows remote attackers
to cause a denial of service or possibly have unspecified other impact via
unknown vectors.

CVE-2011-0216:
An Off-by-one error have been discoveried that allows remote attackers to 
execute arbitrary code or cause a denial of service. 

CVE-2011-2821:
A memory corruption (double free) bug has been identified in libxml2's XPath
engine. Through it, it is possible to an attacker allows cause a denial of 
service or possibly have unspecified other impact. This vulnerability does not
affect the oldstable distribution (lenny).

CVE-2011-2834:
Yang Dingning discovered a double free vulnerability related to XPath handling.

CVE-2011-3905:
An out-of-bounds read vulnerability had been discovered, which allows remote
attackers to cause a denial of service.

For the oldstable distribution (lenny), this problem has been fixed in
version 2.6.32.dfsg-5+lenny5.

For the stable distribution (squeeze), this problem has been fixed in
version 2.7.8.dfsg-2+squeeze2.

For the testing distribution (wheezy), this problem has been fixed in
version 2.7.8.dfsg-7.

For the unstable distribution (sid), this problem has been fixed in
version 2.7.8.dfsg-7.

We recommend that you upgrade your libxml2 packages.

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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