Re: ircd exploit in ircu based code (fwd)

[Andrea Cocito <blackye@UNDERNET.ORG>]

>From: Kevin Day <toasty@DRAGONDATA.COM>
>To: BUGTRAQ@SECURITYFOCUS.COM
>Subject: ircd exploit in ircu based code
>
>Most irc networks using ircu based servers have a bug that can cause users
>to segfault the server.
>
>In m_join, the code doesn't check to see if get_channel returned failure (by
>returning NULL).

As of now I can't even find this bug in the oldest versions of our code,
for sure isn't there in u2.10.06, I still have to check on the previous
2.10.05 that is still packaged in some Linux/BSD distributions.

Would you please let me know in what version of the Undernet's code you
found it and, in case there is still a way to core the current servers
report the way to exploit it on bugs@undernet.org ?

We would appreciate a lot if any bug that can cause a server coredump
is reported on bugs@undernet.org with a few days of advantage respect
to the other public lists... so we can fix it on te fly (we happen to
have a living network with 38k users on it...).

Thanks a lot,

Andrea aka Nemesi,

Undernet's coder committee.