On Thu, Jan 08, 2004 at 01:38:37AM +0100, Tomasz Papszun wrote:
> 
> In case someone is interested, I'm including here test results of
> a set:
> Postfix + Amavisd-new (20030616p5-6) + ClamAV (0.60+BugFixesFromCVS-20030916).
> 
> >From the 1st group of tests on www.antivirus.org, only 1 of 15 test
> messages was let through:
> 
> Nr 8. "Eicar virus sent using BinHex encoding within a MIME segment".
> 

My amavisd-new doesn't seem to decode BinHex encoded attachments.
Maybe you should take this up with the amavis-users list.
Although the real problem may be that my file-4.07 program identifies the
binhex encoded file as "Emacs v18 byte-compiled Lisp data"


> 
> >From the 2nd group of tests (important only for M$ Outlook), 5 of 7
> test messages were let through:
> 
> Nr 2. "Outlook 'Space Gap' vulnerability (includes Eicar virus as hidden
>        attachment)",
> 

The 'Space Gap' test contains a base-64 encoded attachment named
eicar.com, but it doesn't seem to actually be the eicar test file when
it's decoded. 
I wouldn't expect any scanner to catch it.



> Nr 3. "Outlook 'Blank Folding' Vulnerability (does not include Eicar
>        virus"),
> 
> Nr 4. "Outlook 'Boundary Space Gap' Vulnerability (does not include
>        Eicar virus)",
> 
> Nr 5. "Outlook 'Long Boundary' Vulnerability (does not include Eicar
>        virus)",
> 
> Nr 7. "A file with a CLSID extension which may hide the real file
>        extension (does not include Eicar virus)".

I'm not sure these are exploits we need to be concerned about, but
they can probably be blocked with postfix 2.x mime_header_checks.


-- 
Noel Jones


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