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Secunia Research 23/02/2006

- WinACE 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

* WinACE Version 2.60

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 WinACE, which can
be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a boundary error when reading an
overly large ARJ header block into a fixed-sized heap buffer. This can
be exploited to cause a heap-based buffer overflow.

Successful exploitation allows execution of arbitrary code when a
malicious ARJ archive is opened.

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4) Solution

The vulnerability will be fixed in version 2.61.

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5) Time Table

26/10/2005 - Initial vendor notification.
31/10/2005 - Initial vendor reply.
31/10/2005 - Vendor sends fixed version for testing.
15/11/2005 - Vendor reminder.
23/01/2006 - Vendor reminder.
21/02/2006 - Vendor reminder.
23/02/2006 - Public disclosure.

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6) Credits

Discovered by Tan Chew Keong, Secunia Research.

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7) References

The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2006-0813 for the vulnerability.

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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/2005-67/advisory/

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

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