Elazar Broad has discovered a vulnerability in Webex Meeting Manager, which can be exploited by malicious people to compromise a user's system.
The vulnerability is caused due to a boundary error within the WebexUCFObject ActiveX control (atucfobj.dll) when handling arguments passed to the "NewObject()" method. This can be exploited to cause a stack-based buffer overflow by passing an overly long string as argument to the affected method.
Successful exploitation allows execution of arbitrary code.
The vulnerability is confirmed in version 20.2008.2601.4928. Other versions may also be affected.
Solution: An update should be applied automatically when visiting an upgraded WebEx meeting service server. Please see vendor advisory for further details.
Provided and/or discovered by: Elazar Broad
Original Advisory: Cisco:
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Subject: Webex Meeting Manager WebexUCFObject ActiveX Control Buffer Overflow
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