Title: Rational ClearCase DB Loader TERM Environment Variable Buffer Overflow Vulnerability
Severity: HIGH
Description:
ClearCase is a commercially available software change management package. It is maintained and distributed by Rational.
A problem with the package could lead to a local user gaining elevated privileges. The problem is in the handling of environment variables by db_loader.
The db_loader program is a setuid root program, installed with a default installation of the software package. The program does not correctly handle input from the executing user's environment variables. When a user with a TERM environment variable of 550 bytes executes the db_loader program, a buffer overflow occurs. This results in the overwriting of stack variables, and can include the return address, which could in turn result in the execution of arbitrary attacker-supplied code.
Since the db_loader program is setuid root, this makes it possible for a local user to execute code with root privileges, and potentially gain administrative access.
Affected Products:
- Rational Software ClearCase 3.2.0
- Rational Software ClearCase 4.0.0
- Rational Software ClearCase 4.1.0
- Rational Software ClearCase 4.2.0
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