Ubuntu 14.04 LTS USN-2214-3 Moderate: Libxml2 Denial Of Service

ubuntu

June 17, 2014

USN-2214-1 introduced a regression in libxml2.

Summary

USN-2214-1 introduced a regression in libxml2.

Software Description:

- libxml2: GNOME XML library

Details:

USN-2214-1 fixed vulnerabilities in libxml2. The upstream fix introduced a

number of regressions. 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.

Topics Covered

security advisory denial of service Ubuntu libxml2 regression fix

Update Instructions

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

Ubuntu 14.04 LTS:
  libxml2                         2.9.1+dfsg1-3ubuntu4.3

Ubuntu 13.10:
  libxml2                         2.9.1+dfsg1-3ubuntu2.3

Ubuntu 12.04 LTS:
  libxml2                         2.7.8.dfsg-5.1ubuntu4.9

Ubuntu 10.04 LTS:
  libxml2                         2.7.6.dfsg-1ubuntu1.13

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