Mandriva Linux Security Update Advisory – Miniserv.pl in Webmin 1.220, when full PAM conversations is enabled, allows remote attackers to bypass authentication by spoofing session IDs via certain metacharacters (line feed or carriage return).
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/40516/MDKSA-2005-176.txt
Source: https://packetstormsecurity.com/files/40516/Mandriva-Linux-Security-Advisory-2005.176.html