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Re: WMF Exploit
From: Paul Laudanski <zx () castlecops com>
Date: Fri, 30 Dec 2005 15:40:55 -0500 (EST)

On Thu, 29 Dec 2005, Bill Busby wrote:

It is not only *.wmf extensions it is all files that
have windows metafile headers that will open with the
Windows Picture and Fax Viewer.  Any file that has the
header of a windows metafile can trigger this exploit.

Sunbelt Kerio and Bleeding Snort have put together two rules for this:

alert ip any any -> any any (msg: "COMPANY-LOCAL WMF Exploit"; content:"01 
00 09 00 00 03 52 1f 00 00 06 00 3d 00 00 00"; content:"00 26 06 0f 00 08 
00 ff ff ff ff 01 00 00 00 03 00 00 00 00 00"; reference: 
url,www.frsirt.com/exploits/20051228.ie_xp_pfv_metafile.pm.php; 
sid:2005122802; classtype:attempted-user; rev:1;) 

alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"BLEEDING-EDGE EXPLOIT 
WMF Escape Record Exploit"; flow:established,from_server; content:"01 00 
09 00 00 03"; depth:500; content:"00 00"; distance:10; within:12; 
content:"26 06 09 00"; within:5000; classtype:attempted-user; 
reference:url,www.frsirt.com/english/advisories/2005/3086; sid:2002733; 
rev:1;) 

Simply add it to Sunbelt Kerio's bad-traffic.rlk file, or download it:

http://castlecops.com/p687296-.html#687296

-- 
Paul Laudanski, Microsoft MVP Windows-Security
[cal] http://events.castlecops.com
[de] http://de.castlecops.com
[en] http://castlecops.com
[wiki] http://wiki.castlecops.com
[family] http://cuddlesnkisses.com


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