User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaws exists within myCIOScn.dll. MyCioScan.Scan.ShowReport() will accept commands that are passed to a function that simply executes them without authentication. This can be leveraged by a malicious attacker to execute arbitrary code within the context of the browser.
Workaround:
The killbit can be set on this control to disable scripting within Internet Explorer by modifying the data value of the Compatibilty Flags DWORD within the following location in the registry:
If the Compatibility Flags value is set to 0x00000400 the control can no longer be instantiated inside the browser. For more information, please see: http://support.microsoft.com/kb/240797
Disclosure Timeline:
2011-04-01 - Vulnerability reported to vendor
2012-01-12 - Coordinated public release of advisory
