the bug is a regression introduced when we merge the debian version 1:4.15.3-3 as part of LP issue https://bugs.launchpad.net/ubuntu/+source/shadow/+bug/2073338
at this merge, we dropped the patch 506_relaxed_usernames.patch thinking that the patch has been integrated in debian but this patch is actually a modified version of the original patch in Debian to disallow purely numeric user/group names we must keep this behavior that is Ubuntu-only -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to shadow in Ubuntu. https://bugs.launchpad.net/bugs/2076898 Title: Numeric name is accepted as valid username for useradd/groupadd Status in shadow package in Ubuntu: In Progress Bug description: Pure numeric names (example 0, 100) should be considered as invalid group and user names The command useradd and groupadd must refuse them This is not the case in the latest version of shadow : 1:4.15.3-3ubuntu1 When we issue: $ useradd 0 The command succeeds instead of failing. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shadow/+bug/2076898/+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
