USN-1151-1: Nagios vulnerabilities

15 June 2011

nagios3 vulnerabilities

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

  • Ubuntu 11.04
  • Ubuntu 10.10
  • Ubuntu 10.04 LTS


An attacker could modify or steal data if you were tricked into clicking on a special link to Nagios.

Software Description

  • nagios3 - A host/service/network monitoring and management system


Stefan Schurtz discovered than Nagios did not properly sanitize its input when processing certain requests, resulting in cross-site scripting (XSS) vulnerabilities. With cross-site scripting vulnerabilities, if a user were tricked into viewing server output during a crafted server request, a remote attacker could exploit this to modify the contents, or steal confidential data, within the same domain.

Update instructions

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

Ubuntu 11.04
nagios3-cgi - 3.2.3-1ubuntu1.2
Ubuntu 10.10
nagios3-cgi - 3.2.1-2ubuntu1.2
Ubuntu 10.04 LTS
nagios3-cgi - 3.2.0-4ubuntu2.2

To update your system, please follow these instructions:

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