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Secunia Research 24/08/2005

- HAURI Anti-Virus ACE 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

ViRobot Expert 4.0
ViRobot Advanced Server
ViRobot Linux Server 2.0
HAURI LiveCall

Other 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 various HAURI
anti-virus products, which can be exploited by malicious people to
compromise a vulnerable system.

The vulnerability is caused due to a boundary error in the ACE
archive decompression library vrAZace.dll when extracting an archive.
This can be exploited to cause a stack-based buffer overflow when
scanning a malicious ACE archive containing a compressed file with
a filename longer than 272 characters.

Successful exploitation allows arbitrary code execution, but requires
that compressed file scanning is enabled.

The vulnerability is related to:
http://secunia.com/SA14359

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4) Solution

Apply patches.

ViRobot Linux Server 2.0:
http://www.globalhauri.com/html/down...unixpatch.html

ViRobot Expert 4.0 / ViRobot Advanced Server:
Update to the latest version via online update (vrazmain.dll
version 5.8.22.137).

HAURI LiveCall:
Update to the latest version by visiting the vendor's LiveCall
website (vrazmain.dll version 5.8.22.137).

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5) Time Table

15/08/2005 - Initial vendor notification.
17/08/2005 - Vendor released patch for VR Linux Server.
23/08/2005 - Vendor released patch for VR Expert, VR Advanced Server
and LiveCall via online update.
24/08/2005 - Public disclosure.

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6) Credits

Discovered by Tan Chew Keong, Secunia Research.

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7) References

HAURI:
http://www.globalhauri.com/html/down...unixpatch.html

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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/2005-33/advisory/

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

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