The remote host is missing an update to python2.4 announced via advisory USN-359-1.
A security issue affects the following Ubuntu releases:
Ubuntu 5.04 Ubuntu 5.10 Ubuntu 6.06 LTS
This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu.
Benjamin C. Wiley Sittler discovered that Python's repr() function did not properly handle UTF-32/UCS-4 strings. If an application uses repr() on arbitrary untrusted data, this could be exploited to execute arbitrary code with the privileges of the python application.
Solution: The problem can be corrected by upgrading your system to the following package versions: