[NT] ALZip Multiple Archive Handling Buffer Overflow

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ALZip Multiple Archive Handling Buffer Overflow
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SUMMARY

" <http://www.altools.net/Default.aspx?tabid=47> ALZip is the easiest to
use, most powerful, and by far the cutest compression utility available."

A buffer overflow vulnerability in ALZip allows attackers to cause the
program to execute arbitrary code.

DETAILS

Vulnerable Systems:
* ALZip version 6.12 (Korean)
* ALZip version 6.1 (International)
* ALZip version 5.52 (English)

Immune Systems:
* ALZip version 6.13 (International)

The vulnerability is caused due to multiple boundary errors when reading
the filename of a compressed file from ALZ, ARJ, ZIP, UUE or XXE archives.
This can be exploited to cause a stack-based buffer overflow (ALZ), or a
heap-based buffer overflow (ARJ / ZIP / UUE / XXE).

Successful exploitation allows execution of arbitrary code when a
malicious ALZ / ARJ archive is opened, or when a ZIP / UUE / XXE archive
is extracted.

Disclosure Timeline:
19/09/2005 - Initial vendor notification
20/09/2005 - Initial vendor reply
28/09/2005 - Notified by vendor that fixed version has been released
05/10/2005 - Public disclosure

ADDITIONAL INFORMATION

The information has been provided by <mailto:vuln@secunia.com> Secunia
Research.
The original article can be found at:
<http://secunia.com/advisories/16847/>
http://secunia.com/advisories/16847/

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