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Keycloak Oauth Implementation Error

High severity GitHub Reviewed Published May 13, 2022 to the GitHub Advisory Database • Updated Oct 10, 2023

Package

maven org.keycloak:keycloak-parent (Maven)

Affected versions

< 3.3.0.Final

Patched versions

3.3.0.Final

Description

It was found that Keycloak oauth would permit an authenticated resource to obtain an access/refresh token pair from the authentication server, permitting indefinite usage in the case of permission revocation. An attacker on an already compromised resource could use this flaw to grant himself continued permissions and possibly conduct further attacks.

References

Published by the National Vulnerability Database Oct 26, 2017
Published to the GitHub Advisory Database May 13, 2022
Reviewed Jul 25, 2023
Last updated Oct 10, 2023

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
High
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:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.198%
(58th percentile)

Weaknesses

CVE ID

CVE-2017-12160

GHSA ID

GHSA-qc72-gfvw-76h7

Source code

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