IRIX's telnetd has a nasty buffer overflow that can be used to gain root access. SGI has issued a fix, but if you're running IRIX prior to 6.5 you are out of luck. Updated exploit code is available at the following address. To turn of scohelphttp, do the following. YABB, an Internet based bulletin board system has a flaw similar to SCO's scohelphttp.
Users can view any world readable files on the filesystem, using the following string.
This is why you should never trust user supplied input. Inc. All rights reserved.