Control: retitle -1 passwd: /etc/group file corruption with usernames ending in blackslash
On Sat, Jul 20, 2024 at 01:40:24AM +0530, vijai kumar wrote: > This happens when a username ending with backslash which belongs to a > group is being deleted. > > Steps to reproduce: > $ useradd 'vijai\' > $ usermod -aG sudo 'vijai\' > $ userdel 'vijai\' I'll note that userdel is not necesary. The following sequence also breaks /etc/group: $ useradd 'vijai\' $ usermod -aG sudo 'vijai\' $ useradd blafasel $ usermod -aG sudo blafasel Results in: sudo:x:27:install,vijaiaudio:x:29:install Should have been: sudo:x:27:install,vijai\,blafasel audio:x:29:install Chris
