High Nessus Plugin ID 20821
SynopsisThe remote host is missing a vendor-supplied security patch
DescriptionThe remote host is missing the patch for the advisory SUSE-SA:2006:005 (nfs-server).
An remotely exploitable problem exists in the rpc.mountd service in the user space NFS server package 'nfs-server'.
Insufficient buffer space supplied to the realpath() function when processing mount requests can lead to a buffer overflow in the rpc.mountd and allows remote attackers to execute code as the root user.
Code execution is definitely possible if the attacker can create symlinks on any of the file systems on the machine running rpc.mountd (/tmp , /home/attacker or similar).
For attackers without filesystem access code execution is potentially possible.
The 'nfs-server' package is obsolete and has been replaced by the 'nfs-utils' package (kernel NFS server) in all currently supported SUSE Linux products already and is only included for completeness.
The 'nfs-utils' package itself is NOT affected by this problem.
This issue is tracked by the Mitre CVE ID CVE-2006-0043.