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Date:      Mon, 31 Mar 2003 14:04:46 -0600
From:      "Jacques A. Vidrine" <nectar@FreeBSD.org>
To:        Brett Glass <brett@lariat.org>
Cc:        freebsd-security@FreeBSD.org
Subject:   Re: what was that?
Message-ID:  <20030331200446.GA41695@madman.celabo.org>
In-Reply-To: <4.3.2.7.2.20030331122909.031ac940@localhost> <4.3.2.7.2.20030331122450.031ace50@localhost>
References:  <4.3.2.7.2.20030331122909.031ac940@localhost> <4.3.2.7.2.20030331102232.0327fa90@localhost> <3E887850.7010100@drweb.ru> <4.3.2.7.2.20030331102232.0327fa90@localhost> <4.3.2.7.2.20030331122450.031ace50@localhost>

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On Mon, Mar 31, 2003 at 12:26:56PM -0700, Brett Glass wrote:
> >No, I don't think so.
> 
> You have a right to disagree, of course. However, some MUAs
> HAVE been reported to have buffer overflow vulnerabilities 
> that can be exploited via an excessively long message ID
> header. I have installed a filter that shortens them to
> prevent Outlook users from being nailed by this bug.

On Mon, Mar 31, 2003 at 12:29:59PM -0700, Brett Glass wrote:
> Oh, and elm apparently has a buffer overflow in Message-ID header
> handling too. See
> 
> http://www.linuxsecurity.com/advisories/redhat_advisory-1497.html

Read my post about the type of data that was in the Message-ID.  It
doesn't /look/ like an overflow --- I did not recognize the data as
executable code `as is', nor once it was decoded.  Thus, I do not
believe that it is a particular attempt at causing a buffer overflow
in a MTA or MUA.

Cheers,
-- 
Jacques A. Vidrine <nectar@celabo.org>          http://www.celabo.org/
NTT/Verio SME          .     FreeBSD UNIX     .       Heimdal Kerberos
jvidrine@verio.net     .  nectar@FreeBSD.org  .          nectar@kth.se



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