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Date:      Sat, 13 Mar 1999 05:25:13 -0800 (PST)
From:      Jesse <j@lumiere.net>
To:        freebsd-security@freebsd.org
Subject:   bind 8.1.2 cache poisoning
Message-ID:  <Pine.BSF.4.05.9903130520380.7303-100000@leaf.lumiere.net>

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Hi,

I scanned my archives of freebsd-security and bugtraq and was surprised
not to find aynthing on the topic. Sorry if I'm missing something
obvious..

I run an IRC server that's part of a small network. Recently I noticed one
user with a very obviously fake hostname. The user started bragging to
various people about it. He said that he had inserted bogus entries into
the cache of the nameserver.

So I checked around and found in the Jan 99 section of rootshell an
exploit which claims to insert entries into the caches of bind 8.1.2
servers (which is what I run and as far as I can tell is the latest
version). If this is true, as it appears, I'm wondering why there's been
no discussion of this anywhere (or any fixes). Seems pretty serious if
anyone can screw with your DNS cache..

Hopefully there's some sort of configuration error on my part that allows
this to happen, but I think I have a pretty normal, secure setup.

Any comments? I thought I'd check here first before writing the bind
maintainers.

Thanks,

---
Jesse <j@lumiere.net>
http://www.lumiere.net/



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