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"Microsoft is aware of an SSL/TLS digital certificate for *.xboxlive.com for which the private keys were inadvertently disclosed," the statement begins. "The certificate could be used in attempts to perform man-in-the-middle attacks."While it does affect all supported releases of Microsoft Windows, the exposed digital certificate cannot be used to issue other certificates, impersonate other domains, or sign code. The main threat against users comes in the form of MitM attacks, in which an attacker could impersonate the ".xboxlive" domain and attempt to intercept the website's secure connection.
“Each user in the communication unknowingly sends traffic to and receives traffic from the attacker, all the while thinking they are communicating only with the intended user,” Microsoft explained, as reported by Techworm.Such traffic could relay user information or sensitive data, including usernames and passwords, to the attacker, which could allow for subsequent attacks in the future, notes ZDNet. At this time, Microsoft is not currently aware of attacks related to this disclosure.
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