Ubuntu Security Notice USN-698-3
23rd December, 2008
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 8.04 LTS
It was discovered that Nagios was vulnerable to a Cross-site request forgery
(CSRF) vulnerability. If an authenticated nagios user were tricked into
clicking a link on a specially crafted web page, an attacker could trigger
commands to be processed by Nagios and execute arbitrary programs. This
update alters Nagios behaviour by disabling submission of CMD_CHANGE commands.
It was discovered that Nagios did not properly parse commands submitted using
the web interface. An authenticated user could use a custom form or a browser
addon to bypass security restrictions and submit unauthorized commands.
The problem can be corrected by updating your system to the following package version:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system upgrade you need to restart Nagios to effect
the necessary changes.