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MSOE.EML.txt

MSOE.EML.txt
Posted Apr 11, 2004
Authored by Arman Nayyeri | Site 4rman.com

Microsoft Outlook Express 6.0 crashes when it attempts to open an EML file that contains a Sender: tag but does not have a From: tag.

tags | advisory
SHA-256 | 401226492dbcf372ba53324b71129d1a0638c59da040c0b64633814b86ffc654

MSOE.EML.txt

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Microsoft Outlook Express EML file Crash vulnerability
======================================================
Title: Microsoft Outlook Express EML file Crash vulnerability
HappyName: Who Send?
Date: Sunday, April 11, 2004
Software: Outlook Express 6.0 (i guess perior versions are vulnerable too)
Vendor: Microsoft Corporation
Patch: N/A (Look at "Vendor Status" section)
Author: Arman Nayyeri, arman-n[at]phreaker.net, http://www.4rman.com
Severity: Low (High if exploitable)


Description:
============
The OE crashes when we open an EML file that contains "Sender: some chars" and does
not have "From:" or have an empty one ("From: ").
When I found this, I think that it's a buffer overflow, but after notifing microsoft
they tell me that it's an invalid data pointer and not a buffer overflow and does
not appear exploitable.
I don't know how I can be sure that it's not exploitable, but if you can find it
exploitable post a message in BUGTRAQ.
This exploit is also possible through email, but the user must double click email
and in some conditions it is not possible because the From field will be added/filled
automatically by some servers.


Exploit:
========
The exploit that I provided is an small EML file with "Sender:" and without
"From:", so it will crash OE.
Download and run eml file until it crashes.

Here is the zip file containing .eml file:
http://www.4rman.com/exploits/whosendthis.zip

please, take a look at my website too!
http://www.4rman.com

Exploit Tested On
=================
Outlook Express 6.0
on
Microsoft Windows XP
Microsoft Windows XP SP1
Microsoft Windows 2003 Enterprise

Vendor Status
=============
Microsoft notified about 3 month ago.
The bug will be fixed as part of the next possible service pack.

Special Thanks
==============
Special thanks to god.

Do I discover more vulnerabilities?
===================================
take it easy! however I'm trying to do!

Disclaimer:
===========
Arman Nayyeri is not responsible for the misuse of the information
provided in this advisory. The opinions expressed are my own and not of
any company. In no event shall the author be liable for any damages
whatsoever arising out of or in connection with the use or spread of this
advisory. Any use of the information is at the user's own risk.

~~~~~~~~~~~~~~
and sorry for my bad english,
Arman Nayyeri
From
Iran
http://www.4rman.com
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