TITLE:
unalz Filename Handling Directory Traversal Vulnerability

SECUNIA ADVISORY ID:
SA19063

VERIFY ADVISORY:
http://secunia.com/advisories/19063/

CRITICAL:
Less critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
unalz 0.x
http://secunia.com/product/6230/

DESCRIPTION:
Secunia Research has discovered a vulnerability in unalz, which
potentially can be exploited by malicious people to compromise a
user's system.

The vulnerability is caused due to an input validation error when
extracting an ALZ archive. This makes it possible to have files
extracted to arbitrary locations outside the specified directory
using the "../" directory traversal sequence.

The vulnerability has been confirmed in version 0.53. Other version
may also be affected.

SOLUTION:
Update to version 0.55.
http://www.kipple.pe.kr/win/unalz/

PROVIDED AND/OR DISCOVERED BY:
Tan Chew Keong, Secunia Research.

ORIGINAL ADVISORY:
Secunia Research:
http://secunia.com/secunia_research/2006-16/

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
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Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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