CVE-2022-1632 in Openshift
Summary
by MITRE • 09/02/2022
An Improper Certificate Validation attack was found in Openshift. A re-encrypt Route with destinationCACertificate explicitly set to the default serviceCA skips internal Service TLS certificate validation. This flaw allows an attacker to exploit an invalid certificate, resulting in a loss of confidentiality.
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Analysis
by VulDB Data Team • 04/09/2026
The vulnerability described in CVE-2022-1632 represents a critical flaw in OpenShift's certificate validation mechanism that undermines the security of encrypted communications within containerized environments. This issue specifically affects the re-encrypt route functionality where the destinationCACertificate parameter is configured with the default serviceCA certificate. The improper validation occurs when the system fails to properly verify the internal Service TLS certificate, creating a pathway for attackers to exploit invalid certificates without detection. This vulnerability resides within the broader category of certificate validation weaknesses that can severely compromise the integrity of secure communications between services in cloud-native environments.
The technical implementation of this flaw stems from how OpenShift handles certificate validation during re-encrypt operations within its routing subsystem. When a re-encrypt route is configured with destinationCACertificate explicitly set to the default serviceCA, the system should validate that the destination certificate matches the expected service CA. However, the flaw allows the system to skip this critical validation step, enabling a man-in-the-middle attack scenario where an attacker can present an invalid certificate and maintain communication without triggering security alerts. This behavior violates fundamental principles of certificate-based authentication and trust establishment that are critical for maintaining secure service-to-service communications in Kubernetes-based environments.
The operational impact of CVE-2022-1632 extends beyond simple confidentiality loss, as it creates persistent security gaps that can be exploited for data interception and potential lateral movement within the cluster. Attackers can leverage this vulnerability to decrypt sensitive communications between services, potentially accessing confidential data, credentials, or application logic that should remain protected. The vulnerability affects the core security infrastructure of OpenShift, undermining trust in the platform's ability to maintain secure communications between microservices and external endpoints. This flaw particularly impacts environments where service-to-service communication is critical and where certificate validation is expected to enforce security policies.
Organizations should implement immediate mitigations including updating to patched versions of OpenShift that address the certificate validation logic, implementing additional monitoring for anomalous certificate behavior, and reviewing all re-encrypt route configurations to ensure proper certificate validation is enforced. The vulnerability aligns with CWE-295 which addresses improper certificate validation, and represents a significant concern for organizations following MITRE ATT&CK framework's credential access and defense evasion techniques. Security teams should also consider implementing certificate transparency monitoring and certificate pinning strategies to provide additional layers of protection against similar validation bypass scenarios. The flaw underscores the importance of proper certificate management in containerized environments and highlights the need for comprehensive security testing of cryptographic implementations in cloud-native platforms.