Secunia Research: Honeywell ScanServer ActiveX Control Use-After-Free Vulnerability

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                     Secunia Research 21/03/2011

- Honeywell ScanServer ActiveX Control Use-After-Free 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 

* Honeywell ScanServer ActiveX Control version 780.0.20.5.

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Highly critical
Impact: System compromise
Where:  Remote

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3) Description of Vulnerability

Secunia Research has discovered a vulnerability in Honeywell 
ScanServer ActiveX Control, which can be exploited by malicious people 
to compromise a user's system.

The vulnerability is caused by a use-after-free error when handling 
the "addOSPLext()" method and can be exploited to dereference already 
freed memory via a specially crafted web page.

Successful exploitation allows execution of arbitrary code.

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4) Solution 

Set the kill-bit for the affected ActiveX control.

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5) Time Table 

23/02/2011 - Vendor notified (1st attempt).
08/03/2011 - Vendor notified (2nd attempt).
21/03/2011 - Public disclosure.

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6) Credits 

Discovered by Carsten Eiram, Secunia Research.

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7) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
CVE-2011-0331 for the vulnerability.

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8) About Secunia

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9) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2011-22/

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

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