Malformed signature kills MailScanner
Alvaro Marin
alvaro at hostalia.com
Mon Mar 14 14:53:03 GMT 2011
Hello,
two days ago, we started to receive messages with a zip attachment.
Those messages were killing MailScanner processes so the queue started
to grow up.
ClamAV wasy detecting those messages with the "rogue.hdb" signatures of
Sanesecurity:
Mar 12 00:01:28 192.168.66.215 clamd[7666]:
/var/spool/MailScanner/incoming/17861/0630461AA4F.A1245/nFedEx.zip:
Sanesecurity.Rogue.0hr.0311v23576 .UNOFFICIAL FOUND
Mar 12 00:01:28 192.168.66.215 clamd[7666]:
/var/spool/MailScanner/incoming/17861/0630461AA4F.A1245.message:
Sanesecurity.Rogue.0hr.0311v23576 .UNOFFICIAL FOUND
As you see, the name of the virus has a " " at the end. Logs show this
strange line:
Mar 12 00:01:48 192.168.66.215 MailScanner[17877]: Found spam-virus in
I changed the rogue.hdb signature file and removed the space at the end
of the line and then the messages were processed fine and the queue was
processed.
Now I see that the signature is correct, without that space, but for
example there are other examples:
$ wget http://ftp.swin.edu.au/sanesecurity/rogue.hdb --no-verbose
2011-03-14 15:43:56 URL:http://ftp.swin.edu.au/sanesecurity/rogue.hdb
[119235/119235] -> "rogue.hdb" [1]
$ grep " $" rogue.hdb
424d531f5dcb364c5b29bdcb5962c8f9:37376:Sanesecurity.Rogue.0hr.08239110
9ffc6994a66be0d8667550a0e9ed80ea:36864:Sanesecurity.Rogue.0hr.0903v13268
3018e99857f31a59e0777396ae634a8f:29568:Sanesecurity.Rogue.0hr.0311n19694
(those signatures have a space at the end of the line).
I'll notify to the signature's creator to correct this, but why
MailScanner dies when the signature has an space? Can be fixed to check it?
Thanks!
Regards,
--
Alvaro Marín Illera
Hostalia Internet
www.hostalia.com
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