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TUCoPS :: Security App Flaws :: b06-2081.htm

Anti-Trojan unacev2.dll Buffer Overflow Vulnerability



Secunia Research: Anti-Trojan unacev2.dll Buffer Overflow Vulnerability
Secunia Research: Anti-Trojan unacev2.dll Buffer Overflow Vulnerability



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                    Secunia Research 08/05/2006

      - Anti-Trojan unacev2.dll Buffer Overflow Vulnerability -

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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 

* Anti-Trojan 5.5.421. 

Prior versions may also be affected.

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2) Severity 

Rating: Highly Critical
Impact: System Access
Where:  Remote

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3) Description of Vulnerability

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

The vulnerability is caused due to a boundary error in UNACEV2.DLL
when extracting an ACE archive containing a file with an overly long
filename. This can be exploited to cause a stack-based buffer overflow
when a user scans a specially crafted ACE archive.

The vulnerability is related to:
SA16479

Successful exploitation requires that the "Search in archive files"
option is enabled.

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4) Solution 

Version 5.5 is no longer supported and no fix is available. 

The vendor recommends existing users to upgrade to the successor
product "a-squared Anti-Malware".

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5) Time Table 

08/05/2006 - Initial vendor notification.
08/05/2006 - Initial vendor reply.
08/05/2006 - Public disclosure.

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6) Credits 

Discovered by Secunia Research.

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7) References

SA16479:
http://secunia.com/advisories/16479/ 

The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2005-2856 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/2006-27/advisory/ 

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

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