Microsoft has launched an out-of-band patch to repair authentication failures on Home windows after putting in the Could 10, 2022 safety replace on Home windows Server area controllers.
The brand new replace ought to repair authentication failures that affected companies resembling Community Coverage Server (NPS), Routing and Distant entry Service (RRAS), Radius, Extensible Authentication Protocol (EAP), and Protected Extensible Authentication Protocol (PEAP).
“A difficulty has been discovered associated to how the mapping of certificates to machine accounts is being dealt with by the area controller,” Microsoft defined.
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The US Cybersecurity and Infrastructure Safety Company (CISA) this week pulled Microsoft’s repair for the bug CVE-2022-26925 from its checklist of recognized exploited vulnerabilities that federal businesses should patch inside a given timeframe.
The bug was a Native Safety Authority (LSA) spoofing vulnerability. Particulars of the bug have been publicly disclosed and exploits exist for it.
An unauthenticated attacker might “name a technique on the LSARPC interface and coerce the area controller to authenticate to the attacker utilizing NTLM. This safety replace detects nameless connection makes an attempt in LSARPC and disallows it,” Microsoft stated.
The bug would have a severity rating of 9.8 when it’s chained with NTLM Relay Assaults on Lively Listing Certificates Companies (AD CS), Microsoft added.
The authentication difficulty was solely triggered after putting in the Could 10 replace on Home windows Server area controllers.
Any beforehand utilized workarounds are not wanted, in response to Microsoft.
Microsoft’s out-of-band patch additionally fixes a separate difficulty brought on by the April KB5011831 or later updates that stopped some Microsoft Retailer apps from opening.
The cumulative updates with the out-of-band repair can be found for Home windows Server 2022 (KB5015013), Home windows Server, model 20H2 (KB5015020), Home windows Server 2019 (KB5015018), and Home windows Server 2016 (KB5015019).
Microsoft has additionally launched standalone updates for Home windows Server 2012 R2 (KB5014986), Home windows Server 2012 (KB5014991), Home windows Server 2008 R2 SP1 (KB5014987), Home windows Server 2008 SP2 (KB5014990).
Admins can manually import the updates into Home windows Server Replace Companies (WSUS) and Microsoft Endpoint Configuration Supervisor.
