Q243649: MS99-047: Unchecked Print Spooler Buffer May Expose System Vulne
Article: Q243649
Product(s): Microsoft Windows NT
Version(s): 4.0,4.5
Operating System(s):
Keyword(s): kbprint kbSecurity kbWinNT400PreSP7Fix KbSECVulnerabilitykbfixlist
Last Modified: 09-MAY-2002
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The information in this article applies to:
- Microsoft Windows NT Server version 4.0, Terminal Server Edition
- Microsoft Windows NT Workstation version 4.0
- Microsoft Windows NT Server version 4.0
- Microsoft Windows NT Server, Enterprise Edition version 4.0
- Microsoft BackOffice Server versions 4.0, 4.5
- Microsoft BackOffice Small Business Server versions 4.0, 4.5
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SYMPTOMS
========
When you pass random data to some of the functions in the Windows NT 4.0 print
spooler sub-system Application Programming Interface (API) that have unchecked
buffers, the print spooler service may stop responding (hang). If the affected
API is provided with a specially-malformed argument, it may be possible to
bypass the computer security settings and run an unauthorized program using a
buffer overrun technique.
The majority of the affected APIs require that the user be a member of the Power
Users or Administrators group. However, at least one API is callable by users
that have not been assigned extended security permissions. The calls can also be
made remotely.
RESOLUTION
==========
Windows NT Server or Workstation 4.0
------------------------------------
To resolve this problem, obtain the individual package referenced below or obtain
the Windows NT 4.0 Security Rollup Package. For additional information on the
SRP, click the article number below to view the article in the Microsoft
Knowledge Base:
Q299444 Post-Windows NT 4.0 Service Pack 6a Security Rollup Package (SRP)
The English-language version of this fix should have the following file
attributes or later:
Date Time Size File name Platform
-------------------------------------------------------------
11/03/99 01:23p 18,704 Localmon.dll x86
11/03/99 01:23p 140,560 Localspl.dll x86
11/03/99 01:23p 13,072 Lprhelp.dll x86
11/03/99 01:23p 21,776 Lprmon.dll x86
11/03/99 06:36p 48,400 Spoolss.dll x86
11/03/99 01:23p 39,184 Spoolss.exe x86
11/03/99 01:23p 80,144 Win32spl.dll x86
11/03/99 01:23p 32,016 Localmon.dll Alpha
11/03/99 01:23p 236,304 Localspl.dll Alpha
11/03/99 01:23p 22,288 Lprhelp.dll Alpha
11/03/99 01:23p 34,064 Lprmon.dll Alpha
11/03/99 06:36p 85,264 Spoolss.dll Alpha
11/03/99 01:23p 65,808 Spoolss.exe Alpha
11/03/99 01:23p 136,464 Win32spl.dll Alpha
NOTE: Lmmon.dll and Lmmon.dbg were inadvertently packaged in Q243649.exe. These
files are not installed when running Q243649.exe and are not required to protect
against the vulnerability described in this kb article.
The Intel-based version of this hotfix has been posted to the following Internet
location as Q243649.exe:
http://download.microsoft.com/download/winntsrv40/Patch/Spooler-fix/NT4/EN-US/Q243649.exe
The Alpha-based version of this hotfix has been posted to the following Internet
location as Q243649.exe:
http://download.microsoft.com/download/winntsrv40/Patch/Spooler-fix/ALPHA/EN-US/Q243649.exe
NOTE: You must be running Service Pack 4 (SP4) or later to apply this fix.
Windows NT Server 4.0, Terminal Server Edition
----------------------------------------------
To resolve this problem, obtain the latest service pack for Windows NT Server
4.0, Terminal Server Edition. For additional information, please see the
following article in the Microsoft Knowledge Base:
Q152734 How to Obtain the Latest Windows NT 4.0 Service Pack
STATUS
======
Windows NT 4.0
--------------
Microsoft has confirmed that this problem could result in some degree of security
vulnerability in Windows NT 4.0.
Windows NT Server 4.0, Terminal Server Edition
----------------------------------------------
Microsoft has confirmed that this problem could result in some degree of security
vulnerability in Windows NT Server 4.0, Terminal Server Edition. This problem
was first corrected in Windows NT Server 4.0, Terminal Server Edition Service
Pack 6.
MORE INFORMATION
================
For related information on this problem, please visit the following Microsoft
Web site:
http://www.microsoft.com/security/bulletins/ms99-047faq.asp
For additional security-related information about Microsoft products, please
visit the following Microsoft Web site:
http://www.microsoft.com/security/
Additional query words: security_patch
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Keywords : kbprint kbSecurity kbWinNT400PreSP7Fix KbSECVulnerability kbfixlist
Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTSEntSearch kbWinNTSEnt400 kbWinNTS400search kbWinNTS400 kbNTTermServ400 kbNTTermServSearch kbAudDeveloper kbBackOfficeSearch kbSBServSearch kbBackOfficeServ400 kbBackOfficeServ450 kbSBServ400 kbSBServ450
Version : :4.0,4.5
Hardware : ALPHA x86
Issue type : kbprb
Solution Type : kbfix
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