Applying the relevant patch is therefore recommended. The good news is that the warning concerning CVE-2023-23397 coincides with the release of the latest Patch Tuesday round of security updates for Microsoft users. MORE FROM FORBES Has Amazon's Ring Been Hacked? Ransomware Gang Posts Threat To Leak Data By Davey Winder What do you need to do now? In order to exploit CVE-2023-23397, which Mandiant says is 'trivial' to execute, an attacker needs to send a malicious email with an "extended MAPI property that contains a UNC path to SMB (TCP 445) share on an attacker-controlled server." This kicks off what is known as a 'Pass the Hash' attack, but in this case, is triggered upon receipt of the email by an unpatched Outlook client, without the target even viewing it. Indeed, Mandiant says that it "anticipates broad, rapid adoption of the CVE-2023-23397 exploit by multiple nation-state and financially motivated actors, including both criminal and cyber espionage actors." Pass the Hash attack Given that this is a no-user-interaction exploit, the potential for harm is high. The race has already begun." Multiple proofs-of-concept now widely availableįurthermore, Mandiant says that multiple proofs-of-concept are now widely available. This is an excellent tool for nation-state actors and criminals alike who will be on a bonanza in the short term. "These are spies, and they have a long track record of successfully evading our notice. Send feedback for Microsoft 365 for Mac"This is more evidence that aggressive, disruptive, and destructive cyberattacks may not remain constrained to Ukraine and a reminder that we cannot see everything," John Hultquist, head of Mandiant Intelligence Analysis at Google Cloud, said. Yes. For the best experience with the new operating system, make sure that you have installed the latest updates for Word, Excel, PowerPoint, Outlook and OneNote. If you continue with an older version of macOS, your Office apps will still work, but you'll no longer receive any updates including security updates. Starting with the November 2022 update (16.67) macOS Big Sur 11 or later is required receive updates to Word, Excel, PowerPoint, Outlook and OneNote. Starting with the November 2022 update (16.67) macOS Big Sur 11 or later is required receive updates to Word, Excel, PowerPoint, Outlook and OneNote. OneDrive: Select Send Feedback from the Help & Settings tab. Outlook: Select Contact Support from the Help menu. Word, Excel, PowerPoint and OneNote: Select the Feedback icon in the top-right corner of the app. If you encounter any issues while using Office, please send us feedback so we can address them. For the best experience with the new operating system, make sure that you have installed the latest updates for Word, Excel, PowerPoint, Outlook and OneNote. For example, if you’re on macOS Big Sur 11, but later you don’t update your macOS to a supported version when macOS Big Sur 11 is no longer supported, you won’t receive any updates of any kind.Īs new major versions of macOS are released and older versions become unsupported, we highly recommend you continue to update your macOS to a supported version in order to receive mainstream support such as security updates as well as new features. If you’re on an unsupported version of macOS, your Office apps will still work but you would no longer receive any updates including security updates. What if I don't update macOS to a supported version? Learn more about the latest macOS releases. The October 2022 update (16.66) is the last build to support macOS Catalina 10.15. Note that new installs of Microsoft 365 for Mac also requires macOS Big Sur 11 or later. Upgrading your operating system to macOS Big Sur 11 or later will allow Office updates to be delivered for your apps. Starting with the November 2022 update (16.67) macOS Big Sur 11 or later is required receive updates to Word, Excel, PowerPoint, Outlook, OneNote, and Defender.
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