Microsoft Outlook certification earners have an understanding of the. The attacker could then relay the stolen NTLM hash to another service and authenticate with that user's level of privilege. Microsoft Office Specialist: Outlook Associate (Office 2019).
Microsoft reports knowledge of targeted exploitation of this privilege escalation vulnerability that allows for new technology LAN manager (NTLM) credential theft. No user interaction is required, and exploitation could occur before a message is viewed in the preview pane.ĬVE-2023-23397 can be exploited when reminders trigger on a malicious message with the PidLidReminderFileParameter extended Messaging Application Programming Interface (MAPI) property configured to a universal naming convention (UNC) path of an attacker-controlled server message block (SMB) share.Īn unauthenticated, remote attacker could send specially crafted messages that would cause a connection to an external attacker-controlled SMB server, leaking the NTLM hash of the user. Microsoft has released security updates for a critical zero-day vulnerability in Outlook, Office, and Microsoft 365 Apps for Enterprise known as CVE-2023-23397.
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