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Keycloak allows unrestricted admin use of system and environment variables

Moderate severity GitHub Reviewed Published Jan 13, 2025 in keycloak/keycloak • Updated Jan 14, 2025

Package

maven org.keycloak:keycloak-quarkus-server (Maven)

Affected versions

< 26.0.8

Patched versions

26.0.8

Description

A security vulnerability has been identified that allows admin users to access sensitive server environment variables and system properties through user-configurable URLs. Specifically, when configuring backchannel logout URLs or admin URLs, admin users can include placeholders like ${env.VARNAME} or ${PROPNAME}. The server replaces these placeholders with the actual values of environment variables or system properties during URL processing.

References

@stianst stianst published to keycloak/keycloak Jan 13, 2025
Published to the GitHub Advisory Database Jan 13, 2025
Reviewed Jan 13, 2025
Published by the National Vulnerability Database Jan 14, 2025
Last updated Jan 14, 2025

Severity

Moderate

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
None
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:H/UI:N/S:U/C:H/I:N/A:N

EPSS score

0.068%
(32nd percentile)

Weaknesses

CVE ID

CVE-2024-11736

GHSA ID

GHSA-f4v7-3mww-9gc2

Source code

Credits

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