USN-1628-1: Qt vulnerability

Ubuntu Security Notice USN-1628-1

8th November, 2012

qt4-x11 vulnerability

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

  • Ubuntu 12.04 LTS
  • Ubuntu 11.10
  • Ubuntu 10.04 LTS

Summary

Qt applications could be made to expose sensitive information over the network.

Software description

  • qt4-x11 - Qt 4 libraries

Details

Juliano Rizzo and Thai Duong discovered a flaw in the Transport Layer
Security (TLS) protocol when it is used with data compression. If an
attacker were able to perform a man-in-the-middle attack, this flaw
could be exploited to view sensitive information. This update disables
TLS data compression in Qt by default.

Update instructions

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

Ubuntu 12.04 LTS:
libqt4-network 4:4.8.1-0ubuntu4.3
Ubuntu 11.10:
libqt4-network 4:4.7.4-0ubuntu8.2
Ubuntu 10.04 LTS:
libqt4-network 4:4.6.2-0ubuntu5.5

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

After a standard system update you need to restart any KDE sessions or
applications linked against Qt to make all the necessary changes.

References

CVE-2012-4929