Secunia Research: HAURI Anti-Virus ACE Archive Handling Buffer Overflow

====================================================================== 

                     Secunia Research 24/08/2005

      - HAURI Anti-Virus ACE Archive Handling Buffer Overflow -

====================================================================== 
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

====================================================================== 
1) Affected Software 

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

Other versions may also be affected.

====================================================================== 
2) Severity 

Rating: Highly Critical
Impact: System access
Where:  Remote

====================================================================== 
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:
SA14359

====================================================================== 
4) Solution 

Apply patches.

ViRobot Linux Server 2.0:
http://www.globalhauri.com/html/download/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) 

====================================================================== 
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.

====================================================================== 
6) Credits 

Discovered by Tan Chew Keong, Secunia Research.

====================================================================== 
7) References

HAURI:
http://www.globalhauri.com/html/download/down_unixpatch.html

====================================================================== 
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/

====================================================================== 
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/

======================================================================