Public bug reported: When using sshd's -i option with stdio that is not a AF_INET/AF_INET6 socket, auth_get_canonical_hostname() returns "UNKNOWN" which is then set as the value of PAM_RHOST, causing pam to try to do a reverse DNS query of "UNKNOWN", which times out multiple times, causing a substantial slowdown when logging in.
upstream PR: https://github.com/openssh/openssh-portable/pull/388 upstream email: https://lists.mindrot.org/pipermail/openssh-unix-dev/2024-April/041289.html Fedora backport: https://src.fedoraproject.org/rpms/openssh/pull-request/71 Debian backport: https://salsa.debian.org/ssh-team/openssh/-/merge_requests/25 ** Affects: openssh (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/2060150 Title: openssh sets PAM_RHOST to UNKNOWN causing slow logins To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/2060150/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
