CVE-2019-1172 Windows Azure Active Directory user token disclosure

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.

Technical details 🔗

Two detailed articles are now published about this:

• CVE-2019-1172 Disclosure of Azure AD personal account auth token to malicious websites when using the recommended browser extension 1/2

• CVE-2019-1172 Disclosure of Azure AD personal account auth token to malicious websites when using the recommended browser extension 2/2

External references 🔗

• Microsoft MSRC: CVE-2019-1172
• MITRE CVE: CVE-2019-1172
• NIST NVD: CVE-2019-1172