Bugtraq mailing list archives
Re: Microsoft Internet Explorer 6 Protocol Handler Vulnerability
From: "Uday Moorjani" <umoorjani () wanadoo fr>
Date: Fri, 6 Aug 2004 09:53:02 -0400
Mr.Robillard, Works fine with IE 6.0.2800.1106.xpsp2.030422-1633IS With the following pathches : SP1 Q828750 Q330994 Q824145 Q820223 Q832894 Q837009 Q831167 Q823353 Q867801 Uday K. MOORAJANI ----- Original Message ----- From: "Robillard, Nicolas" <nicolas.robillard () snclavalin com> To: <bugtraq () securityfocus com>; <cert () cert org>; <news () securiteam com>; <vuln () security nnov ru> Sent: Thursday, August 05, 2004 3:33 PM Subject: Microsoft Internet Explorer 6 Protocol Handler Vulnerability Description : Protocol Handler allow arbitrary switch to be passed to the associated program.<BR> Exploit : The protocol handler are defined in HKEY_CLASSES_ROOT. We will use the MMS protocol for this exemple. In the HKEY_CLASSES_ROOT\MMS\SHELL\OPEN\COMMAND Registry key you can see that the program associated with the MMS protocol is called through "C:\Program Files\Windows Media Player\wmplayer.exe" "%L". (In this cases, this is windows media player). Now if we pass in to IE this string mms:\\."%20/layout%20c , the "%L" in the handler will now be "." /layout c". The /layout switch will open windows media player in Skin Mode. <A HREF=mms:\\."%20/layout%20c>TRY IT</A> Of course, the vulnerability is not to open WMP in Skin Mode but it reside in the hability to pass extra command line switches where only one should be accepted. Nicolas Robillard, GSEC Information Security Advisor, Systems Security Group Global Information Technologies, SNC-LAVALIN INC. Tel : (514) 393-8000 Ext. 6289 455 René-Lévesque Blvd. West, Montreal (QC), Canada H2Z 1Z3 --- avast! Antivirus: Inbound message clean. Virus Database (VPS): 0432-2, 04/08/2004 Tested on: 05/08/2004 17:32:06 avast! is copyright (c) 2000-2003 ALWIL Software. http://www.avast.com --- avast! Antivirus: Outbound message clean. Virus Database (VPS): 0432-2, 04/08/2004 Tested on: 06/08/2004 09:53:04 avast! is copyright (c) 2000-2003 ALWIL Software. http://www.avast.com
Current thread:
- Microsoft Internet Explorer 6 Protocol Handler Vulnerability Robillard, Nicolas (Aug 05)
- Re: Microsoft Internet Explorer 6 Protocol Handler Vulnerability Uday Moorjani (Aug 06)
- <Possible follow-ups>
- Re: Microsoft Internet Explorer 6 Protocol Handler Vulnerability Jouko Pynnonen (Aug 06)