From: Secunia Security Advisories (sec-advsecunia.com)
Date: Fri Feb 29 2008 - 11:17:05 CST

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TITLE:
Berkeley Automounter Suite of Utilities "expn" Insecure Temporary
File

SECUNIA ADVISORY ID:
SA29144

VERIFY ADVISORY:
http://secunia.com/advisories/29144/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

SOFTWARE:
Berkeley Automounter Suite of Utilities (am-utils) 6.x
http://secunia.com/product/17851/

DESCRIPTION:
A security issue has been reported in Berkely Automounter Suite of
Utilities (am-utils), which can be exploited by malicious, local
users to perform certain actions with escalated privileges.

The security issue is caused due to the "expn" script creating
temporary files in an insecure manner. This can be exploited to e.g.
overwrite arbitrary files with the permissions of another user via
symlink attacks.

This is related to:
SA8797

The security issue is reported in version 6.1.5. Other versions may
also be affected.

SOLUTION:
Restrict access to trusted users only.

ORIGINAL ADVISORY:
https://issues.rpath.com/browse/RPL-2255

OTHER REFERENCES:
SA8797:
http://secunia.com/advisories/8797/

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