USN-815-1: libxml2 vulnerabilities

11 August 2009

libxml2 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 9.04
  • Ubuntu 8.10
  • Ubuntu 8.04 LTS
  • Ubuntu 6.06 LTS

Software Description

  • libxml2

Details

It was discovered that libxml2 did not correctly handle root XML document element DTD definitions. If a user were tricked into processing a specially crafted XML document, a remote attacker could cause the application linked against libxml2 to crash, leading to a denial of service. (CVE-2009-2414)

It was discovered that libxml2 did not correctly parse Notation and Enumeration attribute types. If a user were tricked into processing a specially crafted XML document, a remote attacker could cause the application linked against libxml2 to crash, leading to a denial of service. (CVE-2009-2416)

USN-644-1 fixed a vulnerability in libxml2. This advisory provides the corresponding update for Ubuntu 9.04.

Original advisory details:

It was discovered that libxml2 did not correctly handle long entity names. If a user were tricked into processing a specially crafted XML document, a remote attacker could execute arbitrary code with user privileges or cause the application linked against libxml2 to crash, leading to a denial of service. (CVE-2008-3529)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 9.04
libxml2 - 2.6.32.dfsg-5ubuntu4.2
Ubuntu 8.10
libxml2 - 2.6.32.dfsg-4ubuntu1.2
Ubuntu 8.04 LTS
libxml2 - 2.6.31.dfsg-2ubuntu1.4
Ubuntu 6.06 LTS
libxml2 - 2.6.24.dfsg-1ubuntu1.5

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

After a standard system upgrade you need to restart your sessions to effect the necessary changes.

References