TITLE:
WinRAR Format String and Buffer Overflow Vulnerabilities

SECUNIA ADVISORY ID:
SA16973

VERIFY ADVISORY:
http://secunia.com/advisories/16973/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
WinRAR 3.x
http://secunia.com/product/890/

DESCRIPTION:
Secunia Research has discovered two vulnerabilities in WinRAR, which
can be exploited by malicious people to compromise a user's system. 

1) A format string error exists when displaying a diagnostic error
message that informs the user of an invalid filename in an UUE/XXE
encoded file. This can be exploited to execute arbitrary code when a
malicious UUE/XXE file is decoded.

2) A boundary error in UNACEV2.DLL can be exploited to cause a
stack-based buffer overflow. This allows arbitrary code execution
when a malicious ACE archive containing a file with an overly long
file name is extracted.

Vulnerability #2 is related to:
SA14359

The vulnerabilities have been confirmed in version 3.50. Prior
versions may also be affected.

SOLUTION:
Update to version 3.51.
http://www.rarlabs.com/download.htm

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

ORIGINAL ADVISORY:
RARLAB:
http://www.rarlabs.com/rarnew.htm

Secunia Research:
http://secunia.com/secunia_research/2005-53/advisory/

OTHER REFERENCES:
SA14359:
http://secunia.com/advisories/14359/

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About:
This Advisory was delivered by Secunia as a free service to help
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