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 Touch seeded packages, which is subscribed to openssh in Ubuntu. https://bugs.launchpad.net/bugs/2060150 Title: openssh sets PAM_RHOST to UNKNOWN causing slow logins Status in openssh package in Ubuntu: New Bug description: 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/2060150/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
