TITLE:
Debian xmcdconfig Insecure Directory Permissions

SECUNIA ADVISORY ID:
SA20078

VERIFY ADVISORY:
http://secunia.com/advisories/20078/

CRITICAL:
Not critical

IMPACT:
Security Bypass, DoS

WHERE:
Local system

OPERATING SYSTEM:
Debian GNU/Linux 3.1
http://secunia.com/product/5307/
Debian GNU/Linux unstable alias sid
http://secunia.com/product/530/

DESCRIPTION:
Justin B Rye has discovered a security issue in xmcdconfig, which can
be exploited by malicious, local users to bypass certain security
restrictions and potentially cause a DoS (Denial of Service).

The problem is caused by the "/usr/sbin/xmcdconfig" script setting
certain directory permissions to world-writable in "/var/lib/cddb"
and "/var/lib/xmcd/discog". This can potentially be exploited to
cause a DoS by filling up the /var/log partition.

The security issue has been confirmed in version 2.6-17
(Debian/stable) and 2.6-17.1 (Debain/testing). Other versions may
also be affected.

SOLUTION:
Set appropriate permissions for the directories created under
"/var/lib/cddb" and "/var/lib/xmcd/discog" after running xmcdconfig.

PROVIDED AND/OR DISCOVERED BY:
Justin B Rye

ORIGINAL ADVISORY:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=366816

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