One more way to bypass NAV

Dear [email protected],

I've updated "Bypassing content filtering software" whitepaper
http://www.security.nnov.ru/advisories/content.asp to include new way to
bypass content filtering software. It confirmed to work with NAV and not
to work with McAffee and KAV (AVP).

Symantec was contected via [email protected] and
[email protected] and didn't reply.

13.Case sensitivity of Content-Type and Content-Disposition

Most MUAs ignore case of Content-Type and Content-Disposition headres
while content filtering software may behave in different way. It makes
it possible to bypass content-filtering software by using header like

      CONTENT-type: text/plain;
            NAme=\"eicar.com\"

P.S. thanks to everyone on vuln-dev who participated in testing.

–
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