[Mimedefang] quick heads up: tampered zip passes viruscheck

[Matthew.van.Eerde at hbinc.com]

-----Original Message-----
From:	Jan Pieter Cornet [mailto:johnpc at xs4all.nl]
This came by on the clamav mailinglist, and it went straight through
both of my virus scanners built into mimedefang:

http://www.xs4all.nl/~johnpc/eicar-hidden2.zip

It's a tampered .zip file which includes a copy of EICAR. You might
want to test how your virus scanners handle it. At least "zip" from
InfoZip unpacks it, albeit with a warning, producing a "real"
virus (EICAR).

It's possible to detect this with a bit of Archive::Zip prodding,
but it's too late for me to try that right now.

-- 

Good to know.  Secunia has reported this to be a problem for lotsa virus scanners.
That's why I love the fact that MIMEDefang has an action_quarantine.  I quarantine all .zip files, even if they pass a virus test.  (and .sit, .hqx, .z, .rar, .r21, etc...)

Matthew van Eerde