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TITLE:
Citadel "migrate_aliases.sh" Insecure Temporary Files

SECUNIA ADVISORY ID:
SA31648

VERIFY ADVISORY:
http://secunia.com/advisories/31648/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

SOFTWARE:
Citadel 7.x
http://secunia.com/product/17268/

DESCRIPTION:
A security issue has been discovered in Citadel, which can be
exploited by malicious, local users to perform certain actions with
escalated privileges.

The security issue is caused due to the "migrate_aliases.sh" script
handling temporary files in an insecure manner. This can be exploited
via symlink attacks to overwrite arbitrary files with the privileges
of the user running the script.

The security issue is confirmed in Citadel Server version 7.37. Other
versions may also be affected.

SOLUTION:
Do not use the "migrate_aliases.sh" script in multi-user
environments.

PROVIDED AND/OR DISCOVERED BY:
Reported by Dmitry E. Oboukhov in a Debian bug report.

ORIGINAL ADVISORY:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=496359

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About:
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http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
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Secunia NEVER sends attached files with advisories.
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