6/15/2023 0 Comments Msert hafnium![]() ![]() ExHelper - the complete procedure to update your servers ![]() Your Microsoft account and support teams have been fully mobilized. We are committed to working with you through this issue. We also recommend that your security team assess whether or not the vulnerabilities were being exploited by using the Indicators of Compromise we shared here (see below Have you been compromised ? part, especially the Test-ProxyLogon.ps1 script - link to the latest version provided here) Running this script will tell you if you are behind on your on-premises Exchange Server updates (note that the script does not support Exchange Server 2010). You can use the Exchange Server Health Checker script's latest release, which can be downloaded from GitHub. To patch these vulnerabilities, you should move to the latest Exchange Cumulative Updates and then install the relevant security updates on each Exchange Server. We wanted to ensure you were aware of the situation and would ask that you help drive immediate remediation steps.įor on-premises Exchange Servers, we ask that you direct your teams to start immediate action to assess your Exchange infrastructure and patch vulnerable servers, with the first priority being servers which are accessible from the Internet (e.g., servers publishing Outlook on the web/OWA and ECP). Your Microsoft Customer Success Account Manager and Technical Support Teams will be engaging with your technical teams to assist in addressing this issue. The vulnerabilities exist in on-premises Exchange Servers 2010, 2013, 2016, and 2019. On Tuesday 2nd March 2021, Microsoft released patches for multiple different on-premises Microsoft Exchange Server zero-day vulnerabilities that are being exploited by a nation-state affiliated group. ![]() Update: important note about MSERT scanner - download a new version each time you plan to scan your servers to get the latest signatures ![]() Update: New Guidance for responders article from the Microsoft Exchange Product Team for investigating and remediating the 0-day vulnerability Update: Exchange 2016 CU20 and Exchange 2019 CU9 are out since 16th March 2021, and include the 0-day vulnerability patch !! Update: added Youtube video link to Scott Schnoll Responding to “ProxyLogon” Exchange CVE attacks (see later on this page) Important information regarding Exchange Server (2010, 2013, 2016, 2019) 0-day exploits ![]()
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