Vulnerability Details CVE-2019-1258
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.111
EPSS Ranking 93.1%
CVSS Severity
CVSS v3 Score 8.8
CVSS v2 Score 6.5
References
Products affected by CVE-2019-1258
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cpe:2.3:a:microsoft:active_directory_authentication_library:5.0.0
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cpe:2.3:a:microsoft:active_directory_authentication_library:5.0.1
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cpe:2.3:a:microsoft:active_directory_authentication_library:5.0.2
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cpe:2.3:a:microsoft:active_directory_authentication_library:5.0.3
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cpe:2.3:a:microsoft:active_directory_authentication_library:5.0.5
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cpe:2.3:a:microsoft:active_directory_authentication_library:5.1.0
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cpe:2.3:a:microsoft:active_directory_authentication_library:5.1.1
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cpe:2.3:a:microsoft:nuget:5.2.0