JWT Validation Bypass in Red Hat Quay

Executive Summary

This vulnerability is in Red Hat Quay's JWT validation for federated robot accounts and SSO authentication. It involves flaws in audience verification and enforcement of azp and sub claims. An attacker with a valid token from the same identity provider could bypass security restrictions, gaining unauthorized access by circumventing audience, subject, or authorized-client limitations.

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Detection Guidance

This vulnerability involves JWT validation flaws in Red Hat Quay's federated robot accounts and SSO authentication. Detection requires reviewing JWT token validation logic, particularly audience verification and enforcement of azp and sub claims. Check Quay logs for authentication events and inspect token payloads for misconfigured or missing validation checks.

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Impact Analysis

This flaw could allow unauthorized access to Red Hat Quay resources. Attackers might bypass intended security restrictions, potentially accessing sensitive data or performing actions they are not authorized to do. The impact depends on the user's role and the system's configuration.

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Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by allowing unauthorized access to systems through bypassed authentication restrictions. Weak JWT validation may lead to unauthorized data exposure or modification, violating confidentiality and integrity requirements in these regulations.

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Mitigation Strategies

Update Red Hat Quay to the latest version to ensure JWT validation flaws are patched. Review and enforce strict audience, azp, and sub claim validation in SSO and federated robot account configurations. Restrict access to sensitive operations and audit token validation logs for anomalies.

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