Skip to content

Keycloak mTLS Authentication Bypass via Reverse Proxy TLS Termination

High severity GitHub Reviewed Published Nov 25, 2024 in keycloak/keycloak • Updated Dec 23, 2024

Package

maven org.keycloak:keycloak-core (Maven)

Affected versions

< 24.0.9
>= 25.0.0, < 26.0.6

Patched versions

26.0.6

Description

A vulnerability was found in Keycloak. Deployments of Keycloak with a reverse proxy not using pass-through termination of TLS, with mTLS enabled, are affected. This issue may allow an attacker on the local network to authenticate as any user or client that leverages mTLS as the authentication mechanism.

References

@jonkoops jonkoops published to keycloak/keycloak Nov 25, 2024
Published to the GitHub Advisory Database Nov 25, 2024
Reviewed Nov 25, 2024
Last updated Dec 23, 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
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Weaknesses

CVE ID

CVE-2024-10039

GHSA ID

GHSA-93ww-43rr-79v3

Source code

Credits

Loading Checking history
See something to contribute? Suggest improvements for this vulnerability.