Mandriva Linux Security Advisory – The default behaviour of autofs 5 for the hosts map did not specify the nosuid and nodev mount options. This could allow a local user with control of a remote NFS server to create a setuid root executable on the exported filesystem of the remote NFS server. If this filesystem was mounted with the default hosts map, it would allow the user to obtain root privileges. Likewise, the same scenario would be available for local users able to create device files on the exported filesystem which could allow the user to gain access to important system devices. Because the default behaviour of autofs was to mount -hosts map entries with the dev and suid options enabled by default, autofs has been altered to always use nodev and nosuid by default. In order to have the old behaviour, the configuration must now explicitly set the dev and/or suid options.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/62564/MDVSA-2008-009.txt
Source: https://packetstormsecurity.com/files/62564/Mandriva-Linux-Security-Advisory-2008-009.html