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by grapeli23 1992 days ago
I missed? Such an important was not mentioned

NoNewPrivileges=yes

"A new system.conf setting NoNewPrivileges= is now available which may be used to turn off acquisition of new privileges system-wide (i.e. set Linux' PR_SET_NO_NEW_PRIVS for PID 1 itself, and thus also for all its children). Note that turning this option on means setuid binaries and file system capabilities lose their special powers. While turning on this option is a big step towards a more secure system, doing so is likely to break numerous pre-existing UNIX tools, in particular su and sudo."