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                     Secunia Research 23/09/2005

      - PowerArchiver ACE/ARJ Archive Handling Buffer Overflow -

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Table of Contents

Affected Software....................................................1
Severity.............................................................2
Description of Vulnerability.........................................3
Solution.............................................................4
Time Table...........................................................5
Credits..............................................................6
References...........................................................7
About Secunia........................................................8
Verification.........................................................9

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1) Affected Software 

PowerArchiver 2006 version 9.5 Beta 4/Beta 5
PowerArchiver 2004 version 9.25
PowerArchiver 2003 version 8.60
PowerArchiver 2002 version 8.10

Prior versions may also be affected.

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2) Severity 

Rating: Moderately Critical
Impact: System access
Where:  Remote

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3) Description of Vulnerability

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

The vulnerability is caused due to a boundary error when reading the
filename of a compressed file from an ACE/ARJ archive. This can be
exploited to cause a stack-based buffer overflow when a malicious
archive containing a file with an overly long filename is opened.

Successful exploitation allows arbitrary code execution.

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4) Solution 

Update to the fixed versions.

PowerArchiver 2004:
Update to version 9.26.

The vulnerability has also been fixed in PowerArchiver 2006 Beta 6.

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5) Time Table 

09/09/2005 - Initial vendor notification.
20/09/2005 - Vendor provided fixed version for testing.
22/09/2005 - Vendor released fixed versions.
23/09/2005 - Public disclosure.

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6) Credits 

Discovered by Tan Chew Keong, Secunia Research.

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7) References

No references available.

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8) About Secunia 

Secunia collects, validates, assesses, and writes advisories regarding 
all the latest software vulnerabilities disclosed to the public. These 
advisories are gathered in a publicly available database at the 
Secunia website: 

http://secunia.com/

Secunia offers services to our customers enabling them to receive all 
relevant vulnerability information to their specific system 
configuration. 

Secunia offers a FREE mailing list called Secunia Security Advisories: 

http://secunia.com/secunia_security_advisories/

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9) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2005-50/advisory/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

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