** Description changed: + [Impact] + + * gnutls28 fails to talk to letsencrypt website past September 2021, + despite trusting the letsencrypt root certificate. + + [Test Plan] + + * Import staging cert equivalent to ISRG Root X1 https://letsencrypt.org/certs/staging/letsencrypt-stg-root-x1.pem + + * Import expired staging cert equivalen tto DST Root CA X3 + https://letsencrypt.org/certs/staging/letsencrypt-stg-root-dst.pem + + + * Test connectivity to the expired-root-ca test website + https://expired-root-ca-test.germancoding.com + + + [Where problems could occur] + + * Changes as to how the trust paths are built in TLS connection may + result in introducing bugs (failure to connect to valid sites) and/or + security vulnerabilities (connecting to invalid sites successfully). + + [Other Info] + + * Background info + * The current chain from letsencrypt is expiring, they are adding a new chain, but also keeping the expiring one. This will result in connectivity issues when using old gnutls/openssl against websites using the default letsencrypt configuration after September 2021. + https://community.letsencrypt.org/t/openssl-client-compatibility-changes-for-let-s-encrypt-certificates/143816 https://community.letsencrypt.org/t/questions-re-openssl-client-compatibility-changes-for-let-s-encrypt-certificates/143817 Currently gnutls28 in bionic and earlier will not establish a connection, if any parts of the trust chain have expired, even though alternative non-expired chains are available. This has been fixed in GnuTLS 3.6.14, but probably should be backported to bionic and earlier if it was not already been done so. https://gitlab.com/gnutls/gnutls/-/issues/1008 https://gitlab.com/gnutls/gnutls/-/merge_requests/1271
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928648 Title: expiring trust anchor compatibility issue To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnutls28/+bug/1928648/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
