Re: Multiple Vendor Unusual MIME Encoding Content Filter Bypass
On Wed, 06 Dec 2006 15:24:25 +0100
Hendrik Weimer <hendrik@xxxxxxx> wrote:
> Several e-mail virus scanners can be tricked into passing an EICAR
> test file if the following conditions are met:
>
> 1. the EICAR file is encoded in Base64 including characters not in the
> standard alphabet (e.g. whitespaces) and
> 2. the part containing the EICAR file is nested within one or several
> levels of multipart/mixed content.
>
> Details and PoC can be found at:
> http://www.quantenblog.net/security/virus-scanner-bypass
That's _extremely_ irresponsible to disclose bugs without giving the vendors
any chance to fix them and prepare new software releases.
--
oo ..... Tomasz Kojm <tkojm@xxxxxxxxxx>
(\/)\......... http://www.ClamAV.net/gpg/tkojm.gpg
\..........._ 0DCA5A08407D5288279DB43454822DC8985A444B
//\ /\ Thu Dec 7 15:13:35 CET 2006