Bill Williams (IT): Support Site
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By Virus pretends to be a Microsoft Virus-Fix
Bill Williams


Edit MessageUploaded - 8 Mar 2002 12:39

Virus writers get ever more crafty. A recent one pretends to be a fix from Microsoft. Do NOT execute the attached file: Q216309.exe

The fake message, which is not from Microsoft, has the following characteristics:

From: Microsoft Corporation Security Center
Subject: Internet Security Update
Message:
Microsoft Customer,
this is the latest version of security update, the update which eliminates all known security vulnerabilities affecting Internet Explorer and MS Outlook/Express as well as six new vulnerabilities
.
.
.
How to install
Run attached file q216309.exe
How to use
You don't need to do anything after installing this item.
.

Bill Williams


Edit MessageUploaded - 13 Mar 2002 14:45

A real Microsoft Security Alert looks like this. Notice that it is digitally signed and gives references back to the Microsoft web site so that you can verify the signature, and it does NOT include the patch, you have to fetch that from the genuine Microsoft web site.

-----BEGIN PGP SIGNED MESSAGE-----

- ----------------------------------------------------------------------
Title: Unchecked Buffer in Windows Shell Could Lead to Code
Execution
Date: 07 March 2002
Software: Microsoft Windows 98, NT 4.0, 2000
Impact: Run code of attacker's choice
Max Risk: Moderate
Bulletin: MS02-014

Microsoft encourages customers to review the Security Bulletin at:
http://www.microsoft.com/technet/security/bulletin/MS02-014.asp.
- ----------------------------------------------------------------------

Issue:
======
The Windows Shell is responsible for providing the basic framework
of the Windows user interface experience. It is most familiar to
users as the Windows Desktop, but also provides a variety of other
functions to help define the user's computing session, including
organizing files and folders, and providing the means to start
applications.

An unchecked buffer exists in one of the functions that helps to
locate incompletely removed applications on the system.
A security vulnerability results because it is possible for a
malicious user to mount a buffer overrun attack and attempt to
exploit this flaw. A successful attack would have the affect
of either causing the Windows Shell to crash, or causing code
to run in the user's context.

Be default, this is not remotely exploitable. However, under
very unusual conditions, it could be exploited via a web page
- - specifically, if the user has installed an application with
custom URL handlers and then uninstalled that application, and
the uninstall failed to correctly remove the application
completely. An attacker could then attempt to levy an attack
by constructing an HTML web page that seeks to exploit the
vulnerability, and then posting it on their web site or
sending it by email.

Mitigating Factors:
====================
- In a default installation, this vulnerability is not remotely
exploitable and could only be exploited by introducing hostile
code to the system.

- The vulnerability can be remotely exploited only on machines
that have installed and uninstalled software which implements
customer URL handlers and the software's uninstall failed to
completely remove the application from the system.

- Outlook 98 and 2000 (after installing the Outlook Email
Security Update), Outlook 2002, and Outlook Express 6 all open
HTML mail in the Restricted Sites Zone. As a result, customers
using these products would not be at risk from email-borne
attacks.

- The buffer overrun would allow code to run in the security
context of the user rather than the system. The specific
privileges the attacker could gain through this vulnerability
would therefore depend on the privileges accorded to the user.

Risk Rating:
============
- Internet systems: Low
- Intranet systems: Low
- Client systems: Moderate

Patch Availability:
===================
- A patch is available to fix this vulnerability. Please read the
Security Bulletin at
http://www.microsoft.com/technet/security/bulletin/ms02-014.asp
for information on obtaining this patch.

Acknowledgment:
===============
- - eEye Digital Security (http://www.eeye.com)

- ---------------------------------------------------------------------

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS
PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS
ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR
ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,
CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF
MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION
OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES
SO THE FOREGOING LIMITATION MAY NOT APPLY.

-----BEGIN PGP SIGNATURE-----
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*******************************************************************

You have received this e-mail bulletin as a result of your subscription to the Microsoft Product Security Notification Service. For more information on this service, please visit http://www.microsoft.com/technet/security/notify.asp.

To verify the digital signature on this bulletin, please download our PGP key at http://www.microsoft.com/technet/security/notify.asp.

To cancel your subscription, click on the following link mailto:1_27045_07F7F601-65A0-D011-9D37-0000F84121EB_UK@Newsletters.Microsoft.com?subject=UNSUBSCRIBE to create an unsubscribe e-mail.

To stop all e-mail newsletters from microsoft.com, click on the following link mailto:2_27045_07F7F601-65A0-D011-9D37-0000F84121EB_UK@Newsletters.Microsoft.com?subject=STOPMAIL to create an unsubscribe e-mail. You can manage all your Microsoft.com communication preferences from http://www.microsoft.com/misc/unsubscribe.htm

For security-related information about Microsoft products, please visit the Microsoft Security Advisor web site at http://www.microsoft.com/security.


---------


Revised on 13 Mar 2002

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