Windows Information Disclosure Vulnerability

An information disclosure vulnerability exists in Azure Active Directory (AAD) Microsoft Account (MSA) during the login request session. An attacker who successfully exploited the vulnerability could take over a user’s account.

To exploit the vulnerability, an attacker would have to trick a user into browsing to a specially crafted website, allowing the attacker to steal the user’s token.

The security update addresses the vulnerability by correcting how MSA handles cookies.