USN-1447-1: libxml2 vulnerability

Ubuntu Security Notice USN-1447-1

21st May, 2012

libxml2 vulnerability

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

  • Ubuntu 12.04 LTS
  • Ubuntu 11.10
  • Ubuntu 11.04
  • Ubuntu 10.04 LTS
  • Ubuntu 8.04 LTS

Summary

Applications using libxml2 could be made to crash or run programs as your login if they opened a specially crafted file.

Software description

  • libxml2 - GNOME XML library

Details

Juri Aedla discovered that libxml2 contained an off by one error in its
XPointer functionality. If a user or application linked against libxml2
were tricked into opening a specially crafted XML file, an attacker could
cause the application to crash or possibly execute arbitrary code with the
privileges of the user invoking the program.

Update instructions

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

Ubuntu 12.04 LTS:
libxml2 2.7.8.dfsg-5.1ubuntu4.1
Ubuntu 11.10:
libxml2 2.7.8.dfsg-4ubuntu0.3
Ubuntu 11.04:
libxml2 2.7.8.dfsg-2ubuntu0.4
Ubuntu 10.04 LTS:
libxml2 2.7.6.dfsg-1ubuntu1.5
Ubuntu 8.04 LTS:
libxml2 2.6.31.dfsg-2ubuntu1.9

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

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

CVE-2011-3102