Microsoft confirms Windows Server computers are less secure after recent routine update

Microsoft has confirmed yet another issue that users are experiencing after a recent Windows update, although this time only Windows servers appear to be affected. Microsoft said some apps and devices may no longer be able to create Netlogon secure channel connections after installing the January update it released on Patch Tuesday.

The company explained that Windows clients are not affected, but devices running Windows Server 2008 SP2 and newer, on the other hand, are prone to the problem.

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Scenarios that rely on the read-only domain controller (RODC) or synthetic RODC machine accounts may fail to establish Netlogon secure channels after installing KB5009555 or any update released on or after January 11, 2022, on your domain controller.

RODC account A linked, compliant KRBTGT account is required to successfully establish a secure channel. The company explains: Affected applications or network devices, such as Riverbed SteelHead WAN Optimizers, may experience issues with joining a domain or after joining domain limits.

Work is currently underway on a full fix, but apparently, there is no firm timeline for when it will be released to users. As of press time, the investigation is still ongoing as an update from the developer or manufacturer is required to handle the whole thing.

Affected applications and network devices will require updates from their developers or manufacturers to address this issue. Microsoft and Riverbed are currently investigating and will provide updates when more information is available, it explained.

The only solution should be to remove the aforementioned patch entirely, but on the other hand, it’s important to know that by removing the update, you also lose all the security improvements it deploys on your computer. In other words, you shouldn’t do this because your Windows server machine could end up being exposed to external threats.

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