Public bug reported: The fix that's been applied for bug #974509 checks for the presence of a redirector by looking of three hostnames, and treating as invalid any results pointing to a matching address:
- does-not-exist.example.com. - example.invalid. - a random, unqualified 32-character alphanumeric hostname. The last of these carries a small but non-zero risk of colliding with a real hostname, and there's a small but non-zero risk that this host points to the same address as something we care about. If possible, it would be better to not include this random-host lookup in the algorithm, as somewhere, some day, chances are there will eventually be a collision, causing an incomprehensible and unreproducible failure for a user. ** Affects: cloud-init (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to cloud-init in Ubuntu. https://bugs.launchpad.net/bugs/1088611 Title: using random hostnames to detect dns proxies allows for false positives To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1088611/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs