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Good information!
Microsoft might not but have launched a correct patch for the two new zero-day vulnerabilities which have been exploited in “limited targeted attacks” towards Microsoft Exchange customers, nevertheless it has printed mitigations which might help defend your organisation.
Bad information!
Security researchers have discovered Microsoft’s mitigations could be bypassed.
Here’s a video from researcher Will Dormann the place he gives an indication of the way it’s potential to waltz across the CVE-2022-41040 and CVE-2022-41082 vulnerability mitigations has provided.
However, there’s further excellent news in that it isn’t potential for an unauthenticated person to take advantage of the safety holes remotely, that means that any hacker who needs to assault your on-premises Exchange server might want to have already damaged into considered one of your customers’ accounts, or for a person who’s related to Exchange to have had their pc contaminated by malware that exploits the flaw.
Furthermore, experiences up to now have recommended that the assaults have relied upon PowerShell instructions being triggered, and so blocking TCP ports 5985 and 5986 in your Exchange server will restrict the potential of assaults.
All the identical, excellent news and unhealthy information apart, it might be nice if Microsoft might launch a correct working safety patch as quickly as potential.
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