Microsoft releases out-of-band update for Windows Server

Nancy J. Delong

Microsoft has issued a unusual out-of-band safety update to tackle a vulnerability on some Windows Server methods.

The update, introduced Sunday, should really be applied to Windows Server 2008, 2012, 2016, and 2019 installations in which the server is currently being employed as a domain controller. Equipment only running Lively Listing are not impacted.

Administrators are currently being encouraged to check and set up the updates in order to tackle an authentication situation that was identified and specific very last 7 days. Microsoft mentioned the vulnerability was producing the servers to fail to authenticate end users that relied on one signal-on tokens and some Lively Listing and SQL Server providers.

The Windows safety advisory mentioned the intent of the update was meant “to take care of difficulties in which authentication could fail on DCs with certain Kerberos delegation scenarios on all supported variations of Windows Server when employed as a Domain Controller.”

In accordance to Microsoft, the difficulty was the way Windows Server was handling Kerberos authentication tokens. Particularly, a bug in the S4u2self extension was producing Kerberos tickets to fail to effectively authenticate.

When the determination to drive an update exterior of Microsoft’s normal every month Patch Tuesday timetable as somewhat unusual, Microsoft will on occasion go out of band in order to tackle possibly severe difficulties, in this circumstance a bug that was producing authentication failures.

Final 7 days, Microsoft issued the November edition of Patch Tuesday, addressing a overall of fifty five CVE-outlined vulnerabilities. Of those, two vulnerabilities experienced been exploited in the wild as zero-day flaws and an extra four experienced been made public prior to patching.

Monday’s update will more increase to the patching workload for providers even now doing the job to check and set up the dozens of Patch Tuesday updates as nicely as fixes from Adobe posted on the very same day.

There is some great news to be experienced for directors, even so. Due to the fact the bug only has an effect on Windows Server methods currently being employed as a domain controller, finish user PCs running the customer version of Windows will not need to have to be up to date.

Due to the fact the correct is not currently being distributed by the automatic Windows update company, it will need to have to be attained by the Windows Server Update Companies portal.

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