CVE-2019-1258 – Azure Active Directory Authentication Library Elevation of Privilege Vulnerability

https://notcve.org/view.php?id=CVE-2019-1258

14 Aug 2019 — An elevation of privilege vulnerability exists in Azure Active Directory Authentication Library On-Behalf-Of flow, in the way the library caches tokens. This vulnerability allows an authenticated attacker to perform actions in context of another user. The authenticated attacker can exploit this vulneraiblity by accessing a service configured for On-Behalf-Of flow that assigns incorrect tokens. This security update addresses the vulnerability by removing fallback cache look-up for On-Behalf-Of scenarios. Exi... • https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1258 •