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[SA38523] Hyleos ChemView ActiveX Control Buffer Overflow Vulnerabilities

From: Secunia Security Advisories (sec-advsecunia.com)
Date: Thu Feb 11 2010 - 14:17:10 CST

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TITLE:
Hyleos ChemView ActiveX Control Buffer Overflow Vulnerabilities

SECUNIA ADVISORY ID:
SA38523

VERIFY ADVISORY:
http://secunia.com/advisories/38523/

DESCRIPTION:
Paul Craig has discovered some vulnerabilities in the Hyleos ChemView
ActiveX control, which can be exploited by malicious people to
compromise a user's system.

The vulnerabilities are caused due to two boundary errors in the
HyleosChemView.HLChemView ActiveX control (HyleosChemView.ocx). These
can be exploited to cause stack-based buffer overflows by passing
strings containing an overly large number of white-space characters
to the "SaveasMolFile()" and "ReadMolFile()" methods.

Successful exploitation allows execution of arbitrary code.

The vulnerabilities are confirmed in HyleosChemView.ocx version
1.9.5.1. Other versions may also be affected.

SOLUTION:
Set the kill-bit for the affected ActiveX control.

PROVIDED AND/OR DISCOVERED BY:
Paul Craig, Security-Assessment

ORIGINAL ADVISORY:
http://www.security-assessment.com/files/advisories/2010-02-11_ChemviewX_Activex.pdf

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