Title: Caldera XLock Buffer Overflow Vulnerability
Severity: MODERATE
Description:
xlock is an application distributed with most versions of the X Window System. The vulnerable version is included with CDE distributed with Caldera UnixWare and Open Unix operating systems.
A problem has been discovered that could allow local users to gain elevated privileges. The problem is a buffer overflow in xlock.
xlock, as included with most window systems, is used for providing a screen saver while a user is away from the console, as well as restricting access by unauthorized users. It is usually included as a setuid root executable.
A buffer overflow in this program makes it possible for local users to execute arbitrary code. This could result in a local user gaining elevated privileges, and potentially administrative access.
It is possible that this vulnerability may be already known on other platforms.
Affected Products:
- Caldera OpenUnix 8.0.0
- Caldera UnixWare 7.1.0.0
- Caldera UnixWare 7.1.1
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