TUCoPS :: Windows Apps :: ciacl043.htm

TUCoPS :: Windows Apps :: ciacl043.htm
Microsoft NTLMSSP Privilege Elevation Vulnerability

Microsoft NTLMSSP Privilege Elevation Vulnerability Privacy and Legal Notice CIAC L-043: Microsoft NTLMSSP Privilege Elevation VulnerabilityFebruary 8, 2001 22:00 GMT


PROBLEM:	A flaw in the NTLM Security Support Provider (NTLMSSP) service allows a local user to initiate a specially formed request that executes arbitrary code with LocalSystem security privileges.
PLATFORM:	Windows NT 4.0 Workstation and Server
DAMAGE:	Elevation of privileges, resulting in possible Administrator compromise. The user must be local.
SOLUTION:	Apply the patches in this bulletin. For servers, disallow non-privileged users from locally logging in (this is already a best business practice)

VULNERABILITY ASSESSMENT:	MEDIUM. The adversary must have a valid local account on the system to exploit this vulnerability and elevate privileges.

[****** Microsoft Advisory Start ******]



---------------------------------------------------------------------
Title:  NTLMSSP Privilege Elevation Vulnerability
Date:           07 February 2001
Software:       Windows NT 4.0
Impact: Privilege Elevation
Bulletin:       MS01-008


Microsoft encourages customers to review the Security Bulletin at:
http://www.microsoft.com/technet/security/bulletin/ms01-008.asp
----------------------------------------------------------------------


Issue:
======
A flaw in the NTLM Security Support Provider (NTLMSSP) service could
potentially allow a non-administrative user to gain administrative
control over the system. In order to perform this attack the user
would need a valid login account and the ability to execute arbitrary
code on the system.


Mitigating Controls:
====================
 - This vulnerability could only be exploited by an attacker
   who could log onto the affected machine interactively.


 - Servers could only be affected if the attacker were given the
   ability to load a program of her choice onto the machine and
   execute it locally.  Best practices recommend against this.


Patch Availability:
===================
 - A patch is available to fix this vulnerability. Please read the
   Security Bulletin
   http://www.microsoft.com/technet/security/bulletin/ms01-008.asp
   for information on obtaining this patch.


Acknowledgment:
===============
 - Todd Sabin of BindView (http://razor.bindview.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.

[****** Microsoft Advisory End ******]

CIAC wishes to acknowledge the contributions of Microsoft for the information contained in this bulletin.

CIAC services are available to DOE, DOE Contractors, and the NIH. CIAC can be contacted at:

    Voice:          +1 925-422-8193 (7 x 24)
    FAX:            +1 925-423-8002
    STU-III:        +1 925-423-2604
    E-mail:          ciac@llnl.gov
    World Wide Web:  http://www.ciac.org/
                     http://ciac.llnl.gov
                     (same machine -- either one will work)
    Anonymous FTP:   ftp.ciac.org
                     ciac.llnl.gov
                     (same machine -- either one will work)

This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes.

UCRL-MI-119788
[Privacy and Legal Notice]