I just received an interesting virus.  It's a fake bounce with an
attachment named letter.zip.  It made it through mimedefang (2.49)
unscathed.

I unzipped letter.zip, which contained a single file, named . . .
letter.zip (kind of like Russian dolls).
I unzipped the interior letter.zip, which contained a Letter.pif.  It
appears to be Win32.Mydoom.am (according to Kasperky.com):
http://www.viruslist.com/en/viruses/encyclopedia?virusid=74056

Am I correct that mimedefang will not recursively unzip files when
searching for harmful attachments? 

-David

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D a v i d  E i s n e r        c r a d l e @ u m d . e d u   
CALCE EPSC                         University of Maryland    

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