1. Ubuntu Security Notices
  2. USN-1628-1

USN-1628-1: Qt vulnerability

Publication date

8 November 2012

Overview

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

Releases

Packages

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 machine-in-the-middle attack, this flaw
could be exploited to view sensitive information. This update disables
TLS data compression in Qt by default.

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 machine-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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
12.04 precise libqt4-network –  4:4.8.1-0ubuntu4.3
11.10 oneiric libqt4-network –  4:4.7.4-0ubuntu8.2
10.04 lucid libqt4-network –  4:4.6.2-0ubuntu5.5

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›