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Author customdesigned
Date 2003-08-26.03:37:10
SpamBayes Score
Marked as misclassified
The enclosed real life (inactivated) virus message
causes email.Message to fail to find the multipart
attachments.  This is because the headers following
Content-Type are indented, causing email.Message to
properly append them to Content-Type.  The trick is
that the boundary is quoted, and Outhouse^H^H^H^H^Hlook
apparently gets a value of 'bound' for boundary,
whereas email.Message gets the value
'"bound"\n\tX-Priority...'.  email.Utils.unqoute
apparently gives up and doesn't remove any quotes.

I believe that unqoute should return just what is
between the quotes, so that '"abc" def' would be
unquoted to 'abc'.  In fact, my email filtering
software ( works
correctly on all kinds of screwy mail using my version
of unquote using this heuristic.  I believe that header
used by the virus is invalid, so a STRICT parser should
reject it, but a tolerant parser (such as a virus
scanner would use) should use the heuristic.

Here is a brief script to show the problem (attached
file in test/virus5):
import email

msg = email.message_from_file(open('test/virus5','r'))
print msg.get_params()
$ python2
[('multipart/mixed', ''), ('boundary',
'"bound"\n\tX-Priority: 3\n\tX-MSMail-Priority:
Normal\n\tX-Mailer: Microsoft Outlook Express
5.50.4522.1300\n\tX-MimeOLE: Produced By Microsoft
MimeOLE V5.50.4522.1300')]
Date User Action Args
2007-08-23 16:07:07adminlinkissue795081 messages
2007-08-23 16:07:07admincreate