Ubuntu Security Notice USN-1628-1
8th November, 2012
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 10.04 LTS
Qt applications could be made to expose sensitive information over the network.
- qt4-x11 - Qt 4 libraries
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.
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.