Method to crash vsmon.exe ZoneAlarm/8.0.020.000

EDB-ID:

12959

CVE:

N/A




Platform:

Multiple

Date:

2009-02-20


Crashing ZoneAlarm 8 by Checkpoint (Component : TrueVector)
=====================

----------------------------------------------
Discovered by : QUAKERDOOMER (Azim Poonawala)
quakerdoomer <[ at ]> fmguy.com
http://solidmecca.co.nr
----------------------------------------------

Method to crash vsmon.exe ZoneAlarm/8.0.020.000 :

+++++++++++++++++++++++++++++++++++++
+ - Discovered on 9:48 PM 9/8/2008  +
+ - Vendor Notified 9/23/2008       +
+ - Vendor has patched the Firewall +
+++++++++++++++++++++++++++++++++++++
Vendor Notification Proof :
http://forums.zonelabs.com/zonelabs/board/message?board.id=security&message.id=19991#M19991


- Keep ZoneALarm 8 running with vsmon.exe running (which runs by
default)

- Set up TeamViewer (version = ??) on a system A. TeamViewer opens a
port 5938 for connectivity.
On System B use Internet Explorer 6 and set proxy settings as IP of
System A and port 5938 for HTTP connections

By default IE 6 has homepage as
http://www.microsoft.com/isapi/redir.dll?prd=ie&pver=6&ar=msnhome
Leave it unchanged.

- Keep TeamViewer running on System A.

- Launch IE on System B. It will goto
http://www.microsoft.com/isapi/redir.dll?prd=ie&pver=6&ar=msnhome

- Stop it and type any other web URL in the address bar. IE tries to
locate that URL via the set proxy IP and port.

00000000  17 24 0A 20 00 1A A9 D8  81 88 13 80 00 00 00 00   .$. ....
........ 
00000010  00 01 00 00 00 0F 00 00  00 00 00 00 00 00 00 00   ........
........ 
00000020  00 00 00 00 00                                     .....

CONNECT 208.185.174.65:443 HTTP/1.0
Host: 208.185.174.65:443
Proxy-Connection: Keep-Alive
Accept-Encoding: gzip
Accept: */*
Content-Type: text/plain
User-Agent: ZoneAlarm/8.0.020.000 (oem-1025; en-US) ZSP/2.2




- ZoneAlarm 8's TrueVector Component crashes with a message box,
minidump file in Temp and on closing the message box, it restarts after
a few moments

- ZoneAlarm leaves the system unprotected (HIDS module alone) till the
time TrueVector component is back.

- Demonstration Video links :


http://www.fileden.com/files/2008/9/18/2104312/rogue_proxy_without_za8_running.rar

http://www.fileden.com/files/2008/9/18/2104312/rogue_proxy_crashing_za8issuite.rar

http://www.fileden.com/files/2008/9/18/2104312/zacrash_details.rar

============
Complete Explanation Page available online at : http://solidmecca.co.nr
Exploits Section
Checkpoint (previously ZoneLabs) ZoneAlarm 8 DoS (Rogue proxy) Crasher
============

- The rogue proxy sends the same packet which TeamViewer does.


ZoneAlarm 8 Internet Security Suite Crasher (Rogue Proxy)
Simulates what TeamViewer sent to crash ZA8 on IE 6 WIndows XP SP3.
 
Can be used to used as a rogue proxy to crash your victims' ZA HIDS
component for a few moments
rendering your victim vulnerable to unnoticed, unlogged  system changes.
 
[ Not tested with other browsers. Might work on IE7,8 and others. Seems
to be a Browser Independent bug ]



za_crasher_proxy.b64 (Base64 Encoded File)

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# milw0rm.com [2009-02-20]