Public bug reported: /etc/update-motd.d/50-motd-news contains a function called "safe_print". Its documentation says it does not print control characters, but this is false. If you look at the `tr` command it prints \012 (Device Control 2 aka. DC2 aka. ␒) and \015 (Negative Acknowledge aka. NAK aka. ␕) from the source. I don't know why it would do that, or whether it could possibly be a security issue, especially since it makes the code more complex than it should be (`tr -d '\000-\011\013\014\016-\037'` vs `tr -d '\000-\037'`). A quick `/etc/update-motd.d/50-motd-news --force | grep $'\x12\|\x15'` returned exit code 1, so it's not part of the current MOTD.
** Affects: base-files (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/1857733 Title: MOTD "safe_print" prints control characters To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/base-files/+bug/1857733/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs