[Mimedefang] Slave 0 ran out of memory -- possible DoS attack due to complex MIME

[Aaron Paetznick]

I've been having this problem on my test Alpha linux machine for a few 
days.  Here are the errors:

Jan  9 19:05:24 ds20 mimedefang-multiplexor: Slave 0 stderr: Out of memory!
Jan  9 19:05:24 ds20 mimedefang-multiplexor: Slave 0 ran out of memory 
-- possible DoS attack due to complex MIME?
Jan  9 19:05:24 ds20 mimedefang-multiplexor: Reap: Idle slave 0 (pid 
31462) exited normally with status 1 (SLAVE DIED UNEXPECTEDLY)
Jan  9 19:05:24 ds20 mimedefang[31496]: Error from multiplexor: ERR No 
response from slave
Jan  9 19:05:24 ds20 sendmail[31495]: h0A15NsI031495: Milter: data, 
reject=451 4.7.1 Please try again later


I'm using RedHat 7.1 with sendmail v8.12.7 and MD v2.28.  I'm using the 
patched-02 MIME-Tools, and I've even tried downgrading to MD v2.27 and 
then upgrading to MD v2.29-BETA-1 with the same results.

When would MD give these errors?  What might not be working?  It's NOT 
out of memory as this is an idle test machine with a gig of RAM, and 
it's been freshly rebooted with kernel v2.4.20.  I've tried everything I 
can think of at this point.  Can anybody offer any suggestions?  Thanks 
in advance.


--Aaron