D-TRUST: syntax error in one tls certificate

D-TRUST reported a syntax error in a TLS certificate issued on June 2, 2018, which contained an invalid character in the serial number field. The CA became aware of the issue on November 12, 2018, through a monitoring service. Following the discovery, D-TRUST engaged with the affected customer and took steps to avoid immediate revocation due to potential public harm. The CA implemented additional training and initiated software fixes to prevent future occurrences. All affected certificates have since been revoked, and the CA has committed to improving its reporting and auditing processes.

1. 2018-11-12 D-TRUST became aware of a syntax error in a TLS certificate.
2. 2018-11-22 The problematic certificate was revoked by the customer.

1. 2018-11-23 Bdr representative — D-TRUST reported the syntax error incident and outlined their response timeline.
2. 2018-11-30 Fastly representative — Inquired about the delay in detection of the problem.
3. 2019-01-04 Community commenter — Requested an update on the software fix to prevent similar issues.
4. 2019-01-16 Bdr representative — Confirmed that all affected certificates were revoked and discussed ongoing actions.
5. 2019-02-20 Fastly representative — Noted that all remediation actions are complete.