Title: SCO OpenServer lpforms Buffer Overflow Vulnerability
Severity: MODERATE
Description:
SCO OpenServer 5.0.6 (and possibly earlier versions) ships with several suid bin executables used in printer administration and related tasks.
This includes lpforms, a component used to manage forms used by the LP print service. Lpforms contains a buffer overflow condition present in its handling of command line parameter arguments. By submitting excessive input (at least 6421 characters) to lpforms through the command line, it is possible for a local attacker to trigger a buffer overflow.
This can cause excess data copied onto the stack to overwrite critical parts of the stack frame such as the calling function's return address.
Since this data is supplied by the user it can be made to alter the program's flow of execution. If properly exploited, this can yield user 'bin' privileges to the attacker.
Affected Products:
- SCO Open Server 5.0.6
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