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 126.96.36.199. 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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Subject: Hyleos ChemView ActiveX Control Buffer Overflow Vulnerabilities
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