Ubuntu Security Notice USN-815-1
11th 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 version:
- 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.