source: http://www.securityfocus.com/bid/2498/info

FTPFS is a Linux kernel module allowing users to mount remote files from any standard FTP server as a local filesystem.

A version of FTPFS is vulnerable to a buffer overflow leading to a denial of service, and potentially execution of arbitrary code. This overflow can be exploited by any local user with access to the mount command on a system with FTPFS installed.

mount -t ftpfs none /mnt -o ip=127.0.0.1,user=xxxxxxxxxxxxxxxxxxxxxxxxxxxx...