Debian Security Advisory

DSA-2394-1 libxml2 -- several vulnerabilities

Date Reported:
27 Jan 2012
Affected Packages:
libxml2
Vulnerable:
Yes
Security database references:
In the Debian bugtracking system: Bug 652352, Bug 643648, Bug 656377.
In Mitre's CVE dictionary: CVE-2011-0216, CVE-2011-2821, CVE-2011-2834, CVE-2011-3905, CVE-2011-3919.
More information:

Many security problems have 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 discovered 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 for an attacker to 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.