TITLE:
YIFF Sound Systems Arbitrary File Playback Weakness

SECUNIA ADVISORY ID:
SA17242

VERIFY ADVISORY:
http://secunia.com/advisories/17242/

CRITICAL:
Not critical

IMPACT:
Security Bypass

WHERE:
Local system

SOFTWARE:
YIFF Sound Systems 2.x
http://secunia.com/product/5945/

DESCRIPTION:
Javier Fernandez-Sanguino Pena has discovered a weakness in YIFF
Sound Systems, which can be exploited by malicious, local users to
bypass certain security restrictions.

The weakness is caused due the YIFF server failing to verify file
permissions before playing back files that are specified by the user
using the "yplay" application. The YIFF server runs with root
privileges and can be exploited by a malicious user to playback files
that he does not access to.

The weakness has been confirmed in version 2.14.5. Other versions may
also be affected.

SOLUTION:
Grant only trusted users access to affected systems.

PROVIDED AND/OR DISCOVERED BY:
Javier Fernandez-Sanguino Pena

ORIGINAL ADVISORY:
Debian:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=334616

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