Microsoft Fixes Outlook Zero-day Used by Russian Attackers Since April 2022
Microsoft urges customers to immediately patch their systems against CVE-2023-23397 or add users to the Protected Users group in Active Directory and block outbound SMB (TCP port 445) as a temporary mitigation to minimize the impact of the attacks. Redmond also released a dedicated PowerShell script to help admins check if any users in their Exchange environment have been targeted using this Outlook vulnerability. It “checks Exchange messaging items (mail, calendar and tasks) to see…
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