CVE-2025-31123
Remediation / Mitigation Strategy: CVE-2025-31123 - Zitadel Expired Key Token Retrieval
Vulnerability Description: Zitadel fails to properly check the expiration date of JWT keys when used for Authorization Grants. This allows an attacker with an expired key to obtain valid access tokens.
Severity: High (CVSS Score: 8.7)
Known Exploit: An attacker possessing an expired JWT key can exploit this vulnerability to obtain valid access tokens, potentially leading to unauthorized access to resources protected by Zitadel.
Remediation:
- Immediate Action: Upgrade Zitadel to one of the following patched versions: 2.71.6, 2.70.8, 2.69.9, 2.68.9, 2.67.13, 2.66.16, 2.65.7, 2.64.6, or 2.63.9. This is the primary and recommended solution.
Mitigation (If immediate upgrade is not possible):
- Key Rotation: Implement a more aggressive JWT key rotation policy. Shorten the validity period of JWT keys to minimize the window of opportunity for exploiting expired keys.
- Monitoring and Alerting: Implement robust monitoring and alerting mechanisms to detect suspicious activity related to token issuance or authentication attempts using potentially compromised or expired keys. Specifically, monitor for attempts to use expired keys for Authorization Grants.
- Access Control Review: Review and strengthen access control policies to minimize the potential impact of unauthorized access gained through exploited tokens. Implement the principle of least privilege.
- Temporary Workaround (Potentially Disruptive): As a temporary workaround (with careful consideration of potential disruption), disable or restrict the usage of Authorization Grants until the upgrade can be performed. This should only be considered if the risk is deemed extremely high and the business impact of disabling the feature is acceptable.
- Network Segmentation: Ensure that systems protected by Zitadel are properly segmented from more critical internal networks. In the event of a successful compromise, this would minimize the attacker’s ability to traverse laterally within the network.
Verification:
- After applying the remediation (upgrade), verify that the vulnerability is resolved by attempting to obtain tokens using expired keys. The attempts should be rejected.
- Review Zitadel logs for any error messages related to key expiration during token issuance.
Communication:
- Inform relevant stakeholders (developers, security team, IT operations) about the vulnerability and the implemented remediation/mitigation strategy.
- Provide clear instructions on how to verify the fix and report any issues.
Long-Term Strategy:
- Establish a process for promptly applying security updates and patches for Zitadel and other critical infrastructure components.
- Regularly review and update the key rotation policy.
- Implement security awareness training for developers and administrators on the importance of secure key management practices.
Assigner
- GitHub, Inc. [email protected]
Date
- Published Date: 2025-03-31 19:31:41
- Updated Date: 2025-03-31 20:15:16