Article ID: 243649 - View products that this article applies to.
This article was previously published under Q243649
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.
Windows NT Server or Workstation 4.0To 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:
299444The English-language version of this fix should have the following file attributes or later:
(http://support.microsoft.com/kb/299444/EN-US/ )Post-Windows NT 4.0 Service Pack 6a Security Rollup Package (SRP)
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.
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
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.exeThe 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.exeNOTE: You must be running Service Pack 4 (SP4) or later to apply this fix.
Windows NT Server 4.0, Terminal Server EditionTo resolve this problem, obtain the latest service pack for Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/152734/EN-US/ )How to Obtain the Latest Windows NT 4.0 Service Pack
Windows NT 4.0Microsoft has confirmed that this problem may cause a degree of security vulnerability in Windows NT 4.0.
Windows NT Server 4.0, Terminal Server EditionMicrosoft has confirmed that this problem may cause a 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.
For related information on this problem, please visit the following Microsoft Web site:
http://www.microsoft.com/technet/security/bulletin/fq99-047.mspxFor additional security-related information about Microsoft products, please visit the following Microsoft Web site:
Article ID: 243649 - Last Review: November 1, 2006 - Revision: 4.1