The MD5 algorithm is known not to be collision resistant. This update blacklists the proof of concept rogue certificate authority as discussed in http://www.win.tue.nl/hashclash/rogue-ca/.
The problem can be corrected by updating your system to the following package versions:
17 March 2009
A security issue affects these releases of Ubuntu and its derivatives:
The MD5 algorithm is known not to be collision resistant. This update blacklists the proof of concept rogue certificate authority as discussed in http://www.win.tue.nl/hashclash/rogue-ca/.
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system upgrade you need to restart your session to effect the necessary changes.
Vulmon