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TITLE:
Samba "group_mapping.tdb" Insecure Permissions Security Issue

SECUNIA ADVISORY ID:
SA31601

VERIFY ADVISORY:
http://secunia.com/advisories/31601/

CRITICAL:
Not critical

IMPACT:
Security Bypass

WHERE:
Local system

SOFTWARE:
Samba 3.x
http://secunia.com/product/2999/

DESCRIPTION:
A security issue has been reported in Samba, which can be exploited
by malicious, local users to bypass certain security restrictions.

The security issue is caused due to the application creating the
group_mapping.tdb file with insecure permissions, if the file was
previously deleted. This can be exploited to read or modify Samba
group mapping information.

The security issue is reported in version 3.2.0. Other versions may
also be affected.

SOLUTION:
Restrict local access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Reported by Sascha Herrmann in a Debian bug report.

ORIGINAL ADVISORY:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=496073

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