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- MICROSOFT EXCHANGE SERVER FOR OUTLOOK 2010 HOW TO
- MICROSOFT EXCHANGE SERVER FOR OUTLOOK 2010 UPDATE
- MICROSOFT EXCHANGE SERVER FOR OUTLOOK 2010 PATCH
- MICROSOFT EXCHANGE SERVER FOR OUTLOOK 2010 UPGRADE
- MICROSOFT EXCHANGE SERVER FOR OUTLOOK 2010 FULL
Impact: The Exchange Control Panel will no longer be available. Microsoft Exchange Managed Availability services are also disabled to prevent mitigation regression. ECP Application Pool MitigationĪpplies To: CVE-2021-27065 & CVE-2021-26858ĭescription: This mitigation will disable the Exchange Control Panel (ECP) Virtual Directory. The advanced monitoring capabilities of Exchange are also disabled, due to disabling Microsoft Exchange Managed Availability services. Impact: Unified Messaging/Voicemail outage when these services are disabled. Unified Messaging Mitigationĭescription: This mitigation will disable the Unified Message services in Exchange. You must uninstall the URL Rewrite module and reinstall the correct version. If there is a mismatch between the URL Rewrite module and IIS version, ExchangeMitigations.ps1 will not apply the mitigation for CVE-2021-26855. Installing URL Rewrite version 2.1 on IIS versions 8.5 and lower may cause IIS and Exchange to become unstable. Impact: No known impact to Exchange functionality if URL Rewrite module is installed as recommended. For IIS 8.5 and lower Rewrite Module 2.0 is recommended, version 2.0 can be downloaded here:.For IIS 10 and higher URL Rewrite Module 2.1 is recommended, version 2.1 (x86 and 圆4) can be downloaded here:.
MICROSOFT EXCHANGE SERVER FOR OUTLOOK 2010 PATCH
Note: The IIS Rewrite rules will be removed after Exchange is upgraded and the mitigation will need to be reapplied if the security patch has not been installed. This will help with defense against the known patterns observed but not the SSRF as a whole. Backend Cookie Mitigationĭescription: This mitigation will filter https requests that contain malicious X-AnonResource-Backend and malformed X-BEResource cookies which were found to be used in the SSRF attacks in the wild. Details for mitigations are below and additional information is on the aforementioned GitHub. This script is to be executed via an elevated Exchange PowerShell Session or elevated Exchange Management Shell. This script contains mitigations to help address the following vulnerabilities: This should only be used as a temporary mitigation until Exchange servers can be fully patched, and we recommend applying all of the mitigations at once. This will not evict an adversary who has already compromised a server. The mitigations are effective against the attacks we have seen so far in the wild but are not guaranteed to be complete mitigations for all possible exploitation of these vulnerabilities. These mitigations can be applied or rolled back using the ExchangeMitigations.ps1 script described below and have some known impact to Exchange Server functionality. Disable Offline Address Book (OAB) VDir.Disable Exchange Control Panel (ECP) VDir.Implement an IIS Re-Write Rule to filter malicious https requests.Interim mitigations if unable to patch Exchange Server 2013, 2016, and 2019:
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MICROSOFT EXCHANGE SERVER FOR OUTLOOK 2010 HOW TO
The following has details on how to install the security update:.This method is the only complete mitigation and has no impact to functionality.Recommended solution: Install the security patch All the scripts and tools mentioned in this blog, along with guidance on using them can be found here: Ĭustomers should choose one of the following mitigation strategies based on your organization’s priorities: We recommend initiating an investigation in parallel with or after applying one of the following mitigation strategies. We strongly recommend investigating your Exchange deployments using the hunting recommendations here to ensure that they have not been compromised.
MICROSOFT EXCHANGE SERVER FOR OUTLOOK 2010 FULL
These mitigations are not a remediation if your Exchange servers have already been compromised, nor are they full protection against attack. For customers that are not able to quickly apply updates, we are providing the following alternative mitigation techniques to help Microsoft Exchange customers who need more time to patch their deployments and are willing to make risk and service function trade-offs.
MICROSOFT EXCHANGE SERVER FOR OUTLOOK 2010 UPGRADE
Microsoft previously blogged our strong recommendation that customers upgrade their on-premises Exchange environments to the latest supported version.
MICROSOFT EXCHANGE SERVER FOR OUTLOOK 2010 UPDATE
Update March 15, 2021: If you have not yet patched, and have not applied the mitigations referenced below, a one-click tool, the Exchange On-premises Mitigation Tool is now our recommended path to mitigate until you can patch.