Fetchmail has had several nasty password disclosure vulnerabilities for a long time. It was only recently that these have been found. This affects fetchmail versions 6.3.5 and below.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/53510/fetchmail-SA-2006-02.txt
Source: https://packetstormsecurity.com/files/53510/fetchmail-SA-2006-02.txt.html