Aug 2019: Azure Active Directory Authentication Library Elevation of Privilege Vulnerability
CVE-2019-1258 Published on August 14, 2019
Azure Active Directory Authentication Library Elevation of Privilege Vulnerability
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.
Products Associated with CVE-2019-1258
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Affected Versions
Microsoft ADAL.NET:- Version 5.0.0 and below publication is affected.
- Version 5.0.0 and below publication is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.