SCO Security Advisory – SCO OpenServer 5.0.5, 5.0.6, and 5.0.7 has had multiple vulnerabilities discovered in Xsco. One matches the command line parameter -co hole discovered in Xsun and another allows any local user with X access to gain read/write access to a shared memory segment.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/31839/SCOX.txt
Source: https://packetstormsecurity.com/files/31839/SCOX.txt.html