Ubuntu Security Notice USN-1429-1
26th April, 2012
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.04
- Ubuntu 10.04 LTS
Jetty could be made to hang or crash if it received specially crafted network traffic.
- jetty - Java servlet engine and webserver
It was discovered that Jetty computed hash values for form parameters
without restricting the ability to trigger hash collisions predictably.
This could allow a remote attacker to cause a denial of service by
sending many crafted parameters.
The problem can be corrected by updating your system to the following package version:
- Ubuntu 11.04:
- libjetty-java 6.1.24-6ubuntu0.11.04.1
- Ubuntu 10.04 LTS:
- libjetty-java 6.1.22-1ubuntu1.1
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.