Microsoft has released Security Updates (SUs) for vulnerabilities found in:
Exchange Server 2013
Exchange Server 2016
Exchange Server 2019
SUs are available in a self-extracting auto-elev...
Updated May 08, 2023
Version 22.0
Blog Post
Hi Nino_Bilic & The_Exchange_Team ,
Early this morning our 2019 Exchange CU12 JAN SU server crashed due to high CPU usage (100%). I forced shutdown the VM and powered it back on. Server is up and running now. I checked the logs and saw the two of the events below per second for about 11 seconds until the server crashed.
This occurred last Thursday as well.
How can we prevent this type of DDos attack from occurring? I do not believe the server has been compromised.
Please note I am running Malwarebytes.
I will be installing the MAR SU shortly.
Thank you
An TLS 1.2 connection request was received from a remote client application, but none of the cipher suites supported by the client application are supported by the server. The TLS connection request has failed.