Public bug reported: [impact]
starting in focal, systemd-logind runs sandboxed without any network access, which breaks any configuration that uses remote servers for user data, e.g. ldap, nis, etc A more full discussion is available in the upstream bug report as well as the debian bug report, see other info section below [test case] many possible ways to reproduce this; there are reproducers in some of the bugs reported before that are caused by this, e.g. bug 1915502 or bug 1916235 [regression potential] failure to authenticate when using remote user data, incorrect authentication, security issues due to un-sandboxing of systemd-logind [scope] this is needed in f and later before focal, systemd-logind was not sandboxed so this did not apply [other info] this isn't actually a bug in systemd, this is a by-design security feature, and the intended upstream design is for systemd-logind to talk to systemd-userdb, so that systemd-logind can remain network-sandboxed while systemd-userdb performs any needed network access for user/auth data. However, Debian and Ubuntu don't enable/provide systemd-userdb, so that design does not work for Debian/Ubuntu. this also can cause systemd-udevd failures in some cases as well, apparently (based on upstream and debian discussion comments) For reference, upstream discussion around the systemd-logind sandboxing specifically: https://github.com/systemd/systemd/issues/7074 upstream updated doc PR explaining the upstream position: https://github.com/systemd/systemd/pull/7343 Debian bug report: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878625 ** Affects: systemd Importance: Unknown Status: Unknown ** Affects: nis (Ubuntu) Importance: Undecided Status: Confirmed ** Affects: systemd (Ubuntu) Importance: Undecided Status: Won't Fix ** Affects: nis (Debian) Importance: Unknown Status: Unknown ** Also affects: systemd (Ubuntu) Importance: Undecided Status: New ** Bug watch added: github.com/systemd/systemd/issues #7074 https://github.com/systemd/systemd/issues/7074 ** Also affects: systemd via https://github.com/systemd/systemd/issues/7074 Importance: Unknown Status: Unknown ** Bug watch added: Debian Bug tracker #878625 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878625 ** Also affects: systemd (Debian) via https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878625 Importance: Unknown Status: Unknown ** Also affects: nis (Debian) via https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878625 Importance: Unknown Status: Unknown ** No longer affects: systemd (Debian) ** Changed in: systemd (Ubuntu) Status: New => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1934393 Title: systemd-logind network access is blocked, and breaks remote authentication configurations To manage notifications about this bug go to: https://bugs.launchpad.net/systemd/+bug/1934393/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
