- Date Discovered:
- August 13, 2019
- Microsoft Live Accounts are prone to a privilege-escalation vulnerability. An attacker can exploit this issue to gain elevated privileges.
- Microsoft Exchange Online
- Microsoft Office 365
- Microsoft Outlook Web Access
Block external access at the network boundary, unless external parties require service.Filter access to the affected computer at the network boundary if global access isn't needed. Restricting access to only trusted computers and networks might greatly reduce the likelihood of a successful exploit.
Run all software as a nonprivileged user with minimal access rights.To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.
Deploy network intrusion detection systems to monitor network traffic for malicious activity.Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity such as unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.
Terry Zhang of Tophant and Ron Chan