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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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