Dailydave mailing list archives

Re: disregard - one more test, sorry


From: Rudra Kamal Sinha Roy <rudrak () gmail com>
Date: Wed, 14 Sep 2005 22:05:19 +0530

I donno why so much of noise..two days backs suddenly i have been 
unsubscribed of the list..
any reasons?
 Rudra

 On 9/14/05, Dave Aitel <dave () immunitysec com> wrote: 

Nick Drage wrote:
On Fri, Sep 09, 2005 at 10:02:01AM -0400, Dave Aitel wrote:


We're testing the Bounce handler in mailman. Apparantly you can DoS[1]
a mailman instance by signing a thousand people up to a list (which we
did by mistake) then having those thousand people placed into the
bounce queue. This makes mailman's bounce handler grow to use
approximately one gig of ram and all the CPU. To fix this, you need
(it turns out) to set the bounce handling to "on each bounce, just
disable/unsubscribe that person". However, while the bounce handler is
doing it's painful dance, the administrative interface is only
accessible by shutting down mailman (via killall -9 python).


If you set this up wouldn't it then be relatively trivial to just
unsubscribe/disable every subscriber to the list, as bounce messages are
much easier to fake than unsubscribe confirmations?



Any user that's posted, yes. I looked for the option to have all emailed
GPG signed, but didn't see one. :>

-dave



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