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Vulnerability in Azure Active Directory Authentication Library

High severity GitHub Reviewed Published Aug 16, 2019 to the GitHub Advisory Database • Updated May 31, 2024

Package

nuget microsoft.identitymodel.clients.activedirectory (NuGet)

Affected versions

>= 5.0.0, <= 5.1.1

Patched versions

5.2.0

Description

An elevation of privilege vulnerability exists in Azure Active Directory Authentication Library On-Behalf-Of flow, in the way the library caches tokens, aka 'Azure Active Directory Authentication Library Elevation of Privilege Vulnerability'.

References

Published by the National Vulnerability Database Aug 14, 2019
Reviewed Aug 15, 2019
Published to the GitHub Advisory Database Aug 16, 2019
Last updated May 31, 2024

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.174%
(55th percentile)

Weaknesses

No CWEs

CVE ID

CVE-2019-1258

GHSA ID

GHSA-xc6x-cq47-9chw

Source code

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