December 18, 2023 at 11:39AM
Security researcher Ben Barnea revealed two security flaws in Microsoft Windows that were patched in 2023. These flaws, CVE-2023-35384 and CVE-2023-36710, could be exploited by threat actors to achieve remote code execution on Outlook without user interaction. Mitigation recommendations include microsegmentation and addressing NTLM vulnerabilities. For further updates, follow the publisher on Twitter and LinkedIn.
Based on the meeting notes, here are the key takeaways:
1. Two security flaws in Microsoft Windows were identified, leading to remote code execution on the Outlook email service without user interaction.
2. The security issues, CVE-2023-35384 and CVE-2023-36710, were patched by Microsoft in August and October 2023, respectively.
3. The vulnerabilities could be used to conduct a relay attack, steal NTLM credentials, and gain unauthorized access to Exchange servers.
4. These vulnerabilities could be exploited by sending a malicious file or URL to an Outlook client, allowing for a security feature bypass and zero-click code execution.
5. Mitigation recommendations include using microsegmentation to block outgoing SMB connections, disabling NTLM, and adding users to the Protected Users security group.
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