apparmor.d/profiles/su

# apparmor.d - Full set of apparmor profiles
# Copyright (C) 2019-2021 Mikhail Morfikov
# SPDX-License-Identifier: GPL-2.0-only

abi <abi/3.0>,

include <tunables/global>

@{exec_path} = /{usr/,}bin/su
profile su @{exec_path} {
  include <abstractions/base>
  include <abstractions/consoles>
  include <abstractions/authentication>
  include <abstractions/wutmp>
  include <abstractions/nameservice-strict>
# include <pam/mappings>

  # To remove the following errors:
  #  su: cannot set groups: Operation not permitted
  capability setgid,

  # To remove the following errors:
  #  su: cannot set user id: Operation not permitted
  capability setuid,

  # To write records to the kernel auditing log.
  capability audit_write,

  # Needed?
  audit deny capability net_bind_service,

  signal (send)    set=(term,kill),
  signal (receive) set=(int,quit,term),

  network netlink raw,

  @{exec_path} mr,

  # Shells to use
  /{usr/,}bin/{,b,d,rb}ash rpux,
  /{usr/,}bin/{c,k,tc,z}sh rpux,

  # Fake shells to politely refuse a login
  #/{usr/,}sbin/nologin rpux,

  /etc/environment r,

        @{PROC}/1/limits r,
  owner @{PROC}/@{pid}/loginuid r,

  /etc/default/locale r,
  /etc/security/limits.d/ r,

  /etc/shells r,

  # For pam_securetty
  @{PROC}/cmdline r,
  @{sys}/devices/virtual/tty/console/active r,

  include if exists <local/su>
}