Secunia Research: ComponentOne SizerOne ActiveX Control Buffer Overflow

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                     Secunia Research 07/01/2009

      - ComponentOne SizerOne 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 

* ComponentOne SizerOne 8.0.20081.140

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 

"ComponentOne SizerOne 8.0 is a four-in-one tool that includes two 
resizing controls to easily handle both simple and complex sizing. The
tabbing control enables you to quickly create notebook-style and 
Microsoft Outlook-style tabs. And with the parsing control, you can 
automatically slice and dice strings."

Product Link:
http://www.componentone.com/SuperProducts/SizerOne/

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4) Description of Vulnerability

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

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

Successful exploitation may allow execution of arbitrary code.

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5) Solution 

Update to version 8.0.20081.142 of the ActiveX control.

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6) Time Table 

13/11/2008 - Vendor notified.
19/11/2008 - Vendor response.
25/11/2008 - Vendor informs that vulnerability has been fixed and 
             offers to provide test version.
26/11/2008 - Copy of fixed test version requested.
01/12/2008 - Test version provided by the vendor.
02/12/2008 - Vendor informed that patch fixes vulnerability nicely.
02/12/2008 - Vendor informs that fix will be available within a week.
05/01/2008 - Status update requested.
05/01/2008 - Vendor informs that fix has been made available.
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
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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/2008-52/

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

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