USN-1429-1: Jetty vulnerability

26 April 2012

jetty vulnerability

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.

Software Description

  • 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.

Update instructions

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

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:

In general, a standard system update will make all the necessary changes.