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Keycloak vulnerable to user impersonation via stolen UUID code

High severity GitHub Reviewed Published Mar 2, 2023 in keycloak/keycloak • Updated Nov 7, 2023

Package

maven org.keycloak:keycloak-services (Maven)

Affected versions

< 21.0.1

Patched versions

21.0.1

Description

Keycloak's OpenID Connect user authentication was found to incorrectly authenticate requests. An authenticated attacker who could also obtain a certain piece of info from a user request, from a victim within the same realm, could use that data to impersonate the victim and generate new session tokens.

References

@stianst stianst published to keycloak/keycloak Mar 2, 2023
Published to the GitHub Advisory Database Mar 2, 2023
Reviewed Mar 2, 2023
Published by the National Vulnerability Database Aug 4, 2023
Last updated Nov 7, 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
Low
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

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:L/UI:R/S:C/C:H/I:H/A:N

EPSS score

0.048%
(19th percentile)

Weaknesses

CVE ID

CVE-2023-0264

GHSA ID

GHSA-9g98-5mj6-f9mv

Source code

Credits

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