iTrusChina: CRL Reason Codes
iTrusChina discovered that two revoked certificates were listed in their Certificate Revocation List (CRL) with an undefined reason code (7), which violates TLS Baseline Requirements and RFC 5280. Upon notification from Mozilla, iTrusChina initiated an investigation and confirmed the issue stemmed from system bugs that allowed incorrect revocation reasons. They have since corrected the CRL reason codes to 'unspecified' and implemented measures to prevent future occurrences, including restricting subscriber input for revocation reasons and establishing a daily monitoring task for compliance. The case has been resolved with all action items completed.
- iTrusChina was notified of incorrect CRL reason codes for two revoked certificates.
- iTrusChina completed all remediation action items related to the incident.
- Mozilla representative — Identified two revoked certificates with an undefined CRL reason code.
- iTrusChina Co., Ltd. — Acknowledged the issue and began an investigation.
- iTrusChina Co., Ltd. — Provided an incident report detailing the causes and impacts.
- iTrusChina Co., Ltd. — Confirmed completion of all action items to address the incident.
- Mozilla representative — Requested further details on preventative measures and compliance monitoring.