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Computerized on-premises Alternate Server mitigation now in Microsoft Defender Antivirus – Microsoft Safety Weblog

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As cybercriminals proceed to use unpatched on-premises variations of Alternate Server 2013, 2016, and 2019, we proceed to actively work with prospects and companions to assist them safe their environments and react to related threats. Thus far, we’ve launched a complete examination Safety Replace, a one-click interim Alternate On-Premises Mitigation Software for each present and out-of-support variations of on-premises Alternate Servers, and bit-by-bit steering to assist handle these assaults . these days, we’ve taken an additional tempo to additional help our prospects who’re even weak and haven’t up to now carried out the dispatch safety system replace. With the most recent safety intelligence replace, Microsoft Defender Antivirus and System Heart Endpoint Safety will robotically mitigate CVE-2021-26855 on any weak Alternate Server on which it’s deployed. Prospects don’t have to take motion past making certain they’ve put in the most recent safety intelligence replace ( construct 1.333.747.0 or new ), if they don’t have already got automated updates turned on . DDM 1 - SaveSuperdry The Alternate safety replace continues to be probably the most complete route to guard your servers from these assaults and others mounted in earlier releases. This interim moderation is designed to assist shield prospects whereas they take the time to implement the most recent Alternate Cumulative Replace for his or her model of Alternate.

Microsoft will present steerage to our safety system companions in order that they’ve the choice to make obtainable comparable, easy mitigations of their merchandise a effectively . We’re deeply dedicated to defending our prospects. To remain updated please proceed to evaluate the content material posted at hypertext switch protocol : //aka.ms/exchangevulns .

Often Requested Questions

Q: If I’ve Microsoft Defender Antivirus put in on my Alternate Server do I have to take any additional motion to get this mitigation? A : Prospects that set up Microsoft Defender Antivirus and have automated definition updates enabled ( default setting ) shouldn’t have to take additional motion to obtain the extenuation . Q: My group manages Microsoft Defender Antivirus definition updates.  What do I have to do to make sure I’ve this mitigation? A : Prospects that handle Microsoft Defender Antivirus definition updates want to pick the newly detection construct ( 1.333.747.0 or newer ) and deploy that to the Alternate Server.

Q: After this mitigation, do I nonetheless want to put in the safety replace? A : sure. This automated extenuation breaks the assault chain by mitigating CVE-2021-26855. Prospects ought to nevertheless prioritize getting present on safety updates for Alternate Server to comprehensively handle the vulnerabilities . Q: When does Microsoft Defender Antivirus apply the mitigation? A : Microsoft Defender Antivirus will mechanically determine if a weak adaptation of Alternate Server is put in and apply the mitigations the start time the safety intelligence replace is deployed. The extenuation is deployed as soon as per automotive . Q: Is cloud safety required to obtain the mitigation?

A : nobelium. nevertheless, enabling cloud safety is a finest apply that may preserve you with probably the most stream protections in opposition to the altering risk setting. Prospects are inspired to allow cloud safety . Q: What can I do if I don’t have Microsoft Defender Antivirus? A : Use the One-Click on Microsoft Alternate On-Premises Mitigation Software discovered right here .

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