eliminates a security vulnerability in Windows NT.
The vulnerability could allow a user to cause the print spooler service to crash, or to run arbitrary code on a Windows NT machine. The patch also eliminates a vulnerability that could allow a user to substitute code of their choosing for a print provider that runs in a privileged state.
Certain APIs in the Windows NT 4.0 print spooler subsystem have unchecked buffers. If an affected API were provided with random data as input, it could crash the print spooler service. If it were provided with a specially-malformed argument, it could be used to run arbitrary code on the server via a classic buffer overrun attack. The majority of the affected APIs require the caller to be a member of the Power Users or Administrators group; however, at least one is callable by normal users. None of the calls could be made by anonymous users, but the calls could be made remotely. A second vulnerability exists because incorrect permissions would allow a normal user to specify his or her own code as a print provider. Because print providers run in a local System context, this would allow the user to gain additional privileges on the local machine. This vulnerability could not be exploited remotely.
Microsoft Windows NT 4.0 and quot;Malformed Spooler Request and quot; Vulnerability Patch runs on
Windows NT/2000/Windows 10/11
and is available under the
Freeware
license
— the installer is 420 KB.
We’ve catalogued it under
System.
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