While it’s unfortunate that HAFNIUM has existed in the first place, at least now there is a tool that is going to help the smaller organizations that may not have the resources need to patch their environment. References Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. Further, if you have already started using the other script, you can migrate to this new tool without any issues. Microsoft Exchange Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-26412, CVE-2021-26854, CVE-2021-26857, CVE-2021-26858, CVE-2021-27065, CVE-2021-27078. They also recommend this tool over the previously released ExchangeMitigations.ps1. The company says that before running the tool, it’s important to understand that this patch is only effective against attacks that the company has seen so far and it is not guaranteed to protect against future attacks. Attempt to reverse any changes made by identified threats. Scan the Exchange Server using the Microsoft Safety Scanner.Mitigate against current known attacks using CVE-2021-26855 using a URL Rewrite configuration.This tool also includes Microsoft Safety Scanner and once you run the application, it will perform the following actions: The company says that this tool is designed as an interim mitigation solution but does not fully replace the previously released patch for these systems. Microsoft has released security updates for Microsoft Exchange servers running unsupported Cumulative Update versions vulnerable to ProxyLogon attacks. Announced today, Microsoft has released a ‘one-click’ tool that is able to patch Exchange Server 2013, 2016, and 2019 deployments. MSRC team has released a One-Click Microsoft Exchange On-Premises Mitigation Tool (EOMT).
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