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Ubuntu Security Notice USN-1200-1
September 10, 2011

quassel vulnerability

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

• Ubuntu 11.04
• Ubuntu 10.10
• Ubuntu 10.04 LTS

Summary:

A remote attacker could send crafted input to Quassel and cause it to
crash.

Software Description:

• quassel: KDE/Qt-based IRC client

Details:

It was discovered that Quassel did not properly handle CTCP requests. A
remote attacker could exploit this to cause a denial of service via
application crash.

Update instructions:

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

Ubuntu 11.04:
quassel-core 0.7.2-0ubuntu2.2

Ubuntu 10.10:
quassel-core 0.7.1-0ubuntu1.1

Ubuntu 10.04 LTS:
quassel-core 0.6.1-0ubuntu1.2

After a standard system update you need to restart Quassel to make all the
necessary changes.

References:
http://www.ubuntu.com/usn/usn-1200-1
https://launchpad.net/bugs/845707

Package Information:
https://launchpad.net/ubuntu/+source/quassel/0.7.2-0ubuntu2.2
https://launchpad.net/ubuntu/+source/quassel/0.7.1-0ubuntu1.1
https://launchpad.net/ubuntu/+source/quassel/0.6.1-0ubuntu1.2