I guess the realistic likelihood for this vulnerability to be exploited
is too low as most of the mail servers, these days, are
blocking/dropping blank-From-address emails.
-----Original Message-----
From: Arman Nayyeri [mailto:arman-n_at_Phreaker.net]
Sent: Sunday, April 11, 2004 11:08 AM
To: bugtraq_at_securityfocus.com
Subject: Microsoft Outlook Express EML file Crash vulnerability
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
Received on Apr 14 2004
Intro
