Microsoft PKI Services: Unrevoked 4 intermediate certificates
Microsoft PKI Services experienced an incident involving the unrevocation of four intermediate certificates. Initially revoked on June 24, 2021, these certificates were mistakenly unrevoked shortly after. The issue was reported by Kathleen Wilson, prompting an investigation by Microsoft. They acknowledged the problem and provided a preliminary incident report, detailing the timeline of events and corrective actions taken. The certificates were ultimately confirmed as revoked in the Certificate Revocation List (CRL) on November 13, 2021, and Microsoft has since implemented measures to prevent similar issues in the future.
- Four intermediate certificates were revoked.
- Certificates were mistakenly unrevoked.
- Incident reported by Kathleen Wilson.
- Certificates confirmed as revoked in CRL.
- Remediations completed and playbook updated.