CWE-370

Missing Check for Certificate Revocation after Initial Check
AI Translation Available

The product does not check the revocation status of a certificate after its initial revocation check, which can cause the product to perform privileged actions even after the certificate is revoked at a later time.

Status
draft
Abstraction
variant
Likelihood
medium

If the revocation status of a certificate is not checked before each action that requires privileges, the system may be subject to a race condition. If a certificate is revoked after the initial check, all subsequent actions taken with the owner of the revoked certificate will lose all benefits guaranteed by the certificate. In fact, it is almost certain that the use of a revoked certificate indicates malicious activity.

Common Consequences

access control integrity confidentiality
Impacts
gain privileges or assume identity modify application data read application data

Potential Mitigations

Phases:
architecture and design
Descriptions:
• Ensure that certificates are checked for revoked status before each use of a protected resource. If the certificate is checked before each access of a protected resource, the delay subject to a possible race condition becomes almost negligible and significantly reduces the risk associated with this issue.