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Windows RDP lets you log in using revoked passwords. Microsoft is OK with that.
Researchers say the behavior amounts to a persistent backdoor.
From the department of head scratches comes this counterintuitive news: Microsoft says it has no plans to change a remote login protocol in Windows that allows people to log in to machines using passwords that have been revoked.
Password changes are among the first steps people should take in the event a password has been leaked or an account has been compromised. People expect that once they've taken this step, none of the devices that relied on the password can be accessed.
Not just a bug
The Remote Desktop Protocol—the proprietary mechanism built into Windows for allowing a remote user to log in to and control a machine as if they were directly in front of it—however, will in many cases continue trusting a password even after a user has changed it. Microsoft says the behavior is a design decision to ensure users never get locked out.
