Apt repository at `db.torproject.org` unreachable because of expired certificate
Today we're starting to see errors with the apt repository at https://db.torproject.org/torproject-admin :
Err:8 https://db.torproject.org/torproject-admin buster Release
Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate. Could not handshake: Error in the certificate verification. [IP: 2a01:4f8:fff0:4f:266:37ff:fea1:4d3 443]
Err:9 https://db.torproject.org/torproject-admin packages-restricted Release
Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate. Could not handshake: Error in the certificate verification. [IP: 2a01:4f8:fff0:4f:266:37ff:fea1:4d3 443]
Err:10 https://db.torproject.org/torproject-admin tpo-all Release
Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate. Could not handshake: Error in the certificate verification. [IP: 2a01:4f8:fff0:4f:266:37ff:fea1:4d3 443]
This problem is likely related to the expiration of the DST Root X3 certificate authority that occurred today.
Since no upstream security updates are being retrieved from this repository, and @lavamind and @anarcat are off until next Monday, attending to this issue is not planned until next week.