USN-2214-2: libxml2 regression

Releases

• Ubuntu 14.04 ESM
• Ubuntu 13.10
• Ubuntu 12.04
• Ubuntu 10.04

Packages

• libxml2 - GNOME XML library

Details

USN-2214-1 fixed vulnerabilities in libxml2. The upstream fix introduced a
regression when using xmllint with the --postvalid option. This update
fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Daniel Berrange discovered that libxml2 would incorrectly perform entity
substitution even when requested not to. If a user or automated system were
tricked into opening a specially crafted document, an attacker could
possibly cause resource consumption, resulting in a denial of service.

Update instructions

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

Ubuntu 14.04

• libxml2 - 2.9.1+dfsg1-3ubuntu4.2

Ubuntu 13.10

• libxml2 - 2.9.1+dfsg1-3ubuntu2.2

Ubuntu 12.04

• libxml2 - 2.7.8.dfsg-5.1ubuntu4.8

Ubuntu 10.04

• libxml2 - 2.7.6.dfsg-1ubuntu1.12

In general, a standard system update will make all the necessary changes.

References

• https://launchpad.net/bugs/1321869