[prev in list] [next in list] [prev in thread] [next in thread]
List: microsoft-security
Subject: Microsoft Security Bulletin (MS99-041)
From: Microsoft Product Security <secnotif () MICROSOFT ! COM>
Date: 1999-10-01 1:03:53
[Download RAW message or body]
The following is a Security Bulletin from the Microsoft Product Security
Notification Service.
Please do not reply to this message, as it was sent from an unattended
mailbox.
********************************
Microsoft Security Bulletin (MS99-041)
--------------------------------------
Tool Available for "RASMAN Security Descriptor" Vulnerability
Originally Posted: September 30, 1999
Summary
=======
Microsoft has released a patch that eliminates a vulnerability in
Microsoft(r) Windows NT(r) 4.0. The vulnerability could enable a user to
execute arbitrary code on a Windows NT machine under certain conditions.
Frequently asked questions regarding this vulnerability can be found
at http://www.microsoft.com/security/bulletins/MS99-041faq.asp.
Issue
=====
The security descriptor that secures the Remote Access Connection Manager,
RASMAN.EXE, contains an inappropriate ACE in its DACL and would allow an
unprivileged user to levy requests on it via the Service Control Manager.
Among the actions that could be requested is to change the location and
name of the executable code for the service. By doing so, a malicious user
could substitute arbitrary code for the legitimate service, which then
would run in a System Context.
A malicious user could only exploit this vulnerability if he or she had a
valid userid and password on the target machine. If the machine allowed
users to log on from the network, the vulnerability could be remotely
exploited. In addition, the arbitrary code could, under certain conditions,
reside on a remote machine. A tool is available to reset the permissions to
the appropriate value and eliminate the vulnerability, and should be run
against any machine that allows unprivileged users to perform either
interactive or network logons under any account.
Affected Software Versions
==========================
- Microsoft Windows NT 4.0 Workstation
- Microsoft Windows NT 4.0 Server
- Microsoft Windows NT 4.0 Server, Enterprise Edition
- Microsoft Windows NT 4.0 Server, Terminal Server Edition
Tool Availability
=================
- ftp://ftp.microsoft.com/bussys/winnt/winnt-public/fixes/
usa/nt40/Hotfixes-PostSP6/Security/Rasman-fix/
NOTE: Line breaks have been inserted into the above URL for readability.
More Information
================
Please see the following references for more information related to this
issue.
- Microsoft Security Bulletin MS99-041: Frequently Asked Questions,
http://www.microsoft.com/security/bulletins/MS99-041faq.asp.
- Microsoft Knowledge Base (KB) article Q242294,
Security Descriptor Allows Privilege Elevation on Remote Computers,
http://support.microsoft.com/support/kb/articles/q242/2/94.asp.
(Note: It may take 24 hours from the original posting of this
bulletin for this KB article to be visible.)
- Microsoft Security Advisor web site,
http://www.microsoft.com/security/default.asp.
Obtaining Support on this Issue
===============================
This is a fully supported patch. Information on contacting Microsoft
Technical Support is available at
http://support.microsoft.com/support/contact/default.asp.
Acknowledgments
===============
Microsoft acknowledges Alberto Rodríguez Aragonés for bringing this issue to
our attention.
Revisions
=========
- September 30, 1999: Bulletin Created.
---------------------------------------------------------------------
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.
(c) 1999 Microsoft Corporation. All rights reserved. Terms of Use.
*******************************************************************
You have received this e-mail bulletin as a result of your registration
to the Microsoft Product Security Notification Service. You may
unsubscribe from this e-mail notification service at any time by sending
an e-mail to MICROSOFT_SECURITY-SIGNOFF-REQUEST@ANNOUNCE.MICROSOFT.COM
The subject line and message body are not used in processing the request,
and can be anything you like.
For more information on the Microsoft Security Notification Service
please visit http://www.microsoft.com/security/services/bulletin.asp. For
security-related information about Microsoft products, please visit the
Microsoft Security Advisor web site at http://www.microsoft.com/security.
[prev in list] [next in list] [prev in thread] [next in thread]
Configure |
About |
News |
Add a list |
Sponsored by KoreLogic