Secunia Research: TSC2 Help Desk CTab ActiveX Control Buffer Overflow

[Secunia Research <remove-vuln@xxxxxxxxxxx>]

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                     Secunia Research 07/01/2009

      - TSC2 Help Desk CTab ActiveX Control Buffer Overflow -

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Table of Contents

Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10

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1) Affected Software 

* TSC2 Help Desk 4.1.8

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) Vendor's Description of Software 

"TSC2 Help Desk from is full-featured, easy to use help desk software
that will help you manage your support issues and assets.".

Product Link:
http://www.tsc2-helpdesk.com/

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4) Description of Vulnerability

Secunia Research has discovered a vulnerability in TSC2 Help Desk, 
which can be exploited by malicious people to potentially compromise
a user's system.

The vulnerability is caused due to a boundary error in the included
CTab ActiveX control (c1sizer.ocx) when copying tab captions. This
can be exploited to cause a heap-based buffer overflow by e.g. adding
multiple tabs via the "AddTab()" method.

Successful exploitation may allow execution of arbitrary code.

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5) Solution 

Set the kill-bit for the affected ActiveX control.

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6) Time Table 

13/11/2008 - Vendor notified.
07/01/2009 - Public disclosure.

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7) Credits 

Discovered by Carsten Eiram, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
CVE-2008-4827 for the vulnerability.

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9) About Secunia

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://secunia.com/advisories/business_solutions/

Secunia also provides a publicly accessible and comprehensive advisory
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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2008-54/

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

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