SB2025011349 - Multiple vulnerabilities in Keycloak

Description

This security bulletin contains information about 2 vulnerabilities.

1) Information disclosure (CVE-ID: CVE-2024-11736)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote user to gain access to potentially sensitive information.

The vulnerability exists due to the application discloses values of environment variables via user-configurable URLs. A remote user can configure backchannel logout URLs or admin URLs with placeholders like ${env.VARNAME} or ${PROPNAME} and gain access to sensitive information.

2) Protection Mechanism Failure (CVE-ID: CVE-2024-11734)

CWE-ID: CWE-693 - Protection Mechanism Failure

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient implementation of security measures. A remote user with the rights to change realm settings can send a specially crafted HTTP request with newline characters in headers and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://github.com/keycloak/keycloak/security/advisories/GHSA-f4v7-3mww-9gc2
• https://github.com/keycloak/keycloak/security/advisories/GHSA-w3g8-r9gw-qrh8