USN-488-1: mod_perl vulnerability

18 July 2007

libapache2-mod-perl2 vulnerability

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

  • Ubuntu 7.04
  • Ubuntu 6.10
  • Ubuntu 6.06 LTS

Software Description


Alex Solovey discovered that mod_perl did not correctly validate certain regular expression matches. A remote attacker could send a specially crafted request to a web application using mod_perl, causing the web server to monopolize CPU resources. This could lead to a remote denial of service.

Update instructions

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

Ubuntu 7.04
libapache2-mod-perl2 - 2.0.2-2.3ubuntu1
Ubuntu 6.10
libapache2-mod-perl2 - 2.0.2-2ubuntu1.6.10.1
Ubuntu 6.06 LTS
libapache2-mod-perl2 - 2.0.2-2ubuntu1.6.06.1

To update your system, please follow these instructions:

In general, a standard system upgrade is sufficient to effect the necessary changes.