The Netkit telnetd implementation shipped with Debian Linux appears to be lacking the AYT vulnerability patch. This exposes the platform to a remote root problem discovered by scut of TESO back in 2001.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/34414/debian.telnetd.txt
Source: https://packetstormsecurity.com/files/34414/debian.telnetd.txt.html