shinnai has discovered two vulnerabilities in MW6 Technologies QRCode ActiveX control, which can be exploited by malicious people to overwrite arbitrary files.
The vulnerabilities are caused due to the MW6QRCode.QRCode.1 ActiveX control (MW6QRCode.dll) including the insecure "SaveAsBMP()" and "SaveAsWMF()" methods, which saves an image into a file specified as an argument. These can be exploited to overwrite and corrupt arbitrary files on the system in the context of the currently logged-on user.
The vulnerabilities are confirmed in version 220.127.116.11. Other versions may also be affected.
Solution: Set the kill-bit for the affected ActiveX control.
Provided and/or discovered by: shinnai
Original Advisory: http://www.shinnai.altervista.org/exploits/OREurGhGgAtlCT8J2jSY.html
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Subject: MW6 Technologies QRCode ActiveX Control Two Insecure Methods
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