Ubuntu Security Notice USN-791-2
24th June, 2009
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 9.04
Christian Eibl discovered that the TeX filter in Moodle allowed any
function to be used. An authenticated remote attacker could post
a specially crafted TeX formula to execute arbitrary TeX functions,
potentially reading any file accessible to the web server user, leading
to a loss of privacy. (CVE-2009-1171, MSA-09-0009)
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 access the Moodle instance
and accept the database update to clear any invalid cached data.