I came across this with managing openvpn keys on ubuntu 15.10. The pkitool in my CA folder was from an older version of ubuntu (probably 14.04) so tried updating it to the latest that came with 15.10. It didn't help but Yuriy's fix worked for me.
I've added that it affects openvpn. ** Also affects: openvpn (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1346776 Title: SSL certificate creation crashes without subjectAltName To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/easy-rsa/+bug/1346776/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs