cvs could be made to crash or run programs as your login if it connected to a malicious proxy server.
It was discovered that cvs incorrectly handled certain responses from proxy servers. If a user were tricked into connecting to a malicious proxy server, a remote attacker could cause cvs to crash, or possibly execute arbitrary code.
22 February 2012
A security issue affects these releases of Ubuntu and its derivatives:
cvs could be made to crash or run programs as your login if it connected to a malicious proxy server.
It was discovered that cvs incorrectly handled certain responses from proxy servers. If a user were tricked into connecting to a malicious proxy server, a remote attacker could cause cvs to crash, or possibly execute arbitrary code.
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.
In general, a standard system update will make all the necessary changes.
Vulmon