July 2021 emergency security update: KB5004945/build 19042(3).1083 #KBAlert


 

Hi all,

Print Nightmare emergency update (KB5004945/build 19042(3).1083) is now available from Windows Update. Details are not available yet – this thread will be updated once release notes are published.

Cheers,

Joseph


 

Hi,

Details posted:

July 6, 2021—KB5004945 (OS Builds 19041.1083, 19042.1083, and 19043.1083) Out-of-band (microsoft.com)

 

Changelog:

Updates a remote code execution exploit in the Windows Print Spooler service, known as “PrintNightmare”, as documented in CVE-2021-34527.

 

Details:

 

Version 20H2 (build 19042.1083):

Addresses a remote code execution exploit in the Windows Print Spooler service, known as “PrintNightmare”, as documented in CVE-2021-34527. After installing this and later Windows updates, users who are not administrators can only install signed print drivers to a print server. By default, administrators can install signed and unsigned printer drivers to a print server. The installed root certificates in the system’s Trusted Root Certification Authorities trusts signed drivers. Microsoft recommends that you immediately install this update on all supported Windows client and server operating system, starting with devices that currently host the print server role. You also have the option to configure the RestrictDriverInstallationToAdministrators registry setting to prevent non-administrators from installing signed printer drivers on a print server. For more information, see KB5005010.

 

Version 21H1 (build 19043.1083): same as 20H2.

 

Cheers,

Joseph

 

From: win10@win10.groups.io <win10@win10.groups.io> On Behalf Of Joseph Lee via groups.io
Sent: Tuesday, July 6, 2021 3:09 PM
To: win10@win10.groups.io
Subject: [Special] [win10] July 2021 emergency security update: KB5004945/build 19042(3).1083 #KBAlert

 

Hi all,

Print Nightmare emergency update (KB5004945/build 19042(3).1083) is now available from Windows Update. Details are not available yet – this thread will be updated once release notes are published.

Cheers,

Joseph