USN-829-1: Qt vulnerability

10 September 2009

qt4-x11 vulnerability

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

  • Ubuntu 9.04
  • Ubuntu 8.10
  • Ubuntu 8.04 LTS

Software Description

  • qt4-x11

Details

It was discovered that Qt did not properly handle certificates with NULL characters in the Subject Alternative Name field of X.509 certificates. An attacker could exploit this to perform a man in the middle attack to view sensitive information or alter encrypted communications. (CVE-2009-2700)

Update instructions

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

Ubuntu 9.04
libqt4-network - 4.5.0-0ubuntu4.2
Ubuntu 8.10
libqt4-network - 4.4.3-0ubuntu1.3
Ubuntu 8.04 LTS
libqt4-core - 4.3.4-0ubuntu3.1

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

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

References