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feat(profiles): rethink the su & sudo profiles.
This commit is contained in:
Alexandre Pujol
parent
0896343bbc
commit
9493e783ce
2 changed files with 39 additions and 43 deletions
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@ -1,5 +1,6 @@
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# apparmor.d - Full set of apparmor profiles
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# Copyright (C) 2019-2021 Mikhail Morfikov
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# Copyright (C) 2019-2022 Mikhail Morfikov
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# Copyright (C) 2022 Alexandre Pujol <alexandre@pujol.io>
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# SPDX-License-Identifier: GPL-2.0-only
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abi <abi/3.0>,
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@ -9,6 +10,7 @@ include <tunables/global>
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@{exec_path} = /{usr/,}bin/su
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profile su @{exec_path} {
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include <abstractions/base>
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include <abstractions/app-launcher-root>
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include <abstractions/authentication>
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include <abstractions/consoles>
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include <abstractions/dbus-strict>
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@ -17,42 +19,45 @@ profile su @{exec_path} {
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# include <pam/mappings>
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capability audit_write,
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capability chown, # pseudo-terminal
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capability dac_read_search,
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capability setgid,
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capability setuid,
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capability dac_read_search,
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capability sys_resource,
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# No clear purpose, deny until needed
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deny capability net_admin,
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#audit deny capability net_bind_service,
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audit deny capability net_admin,
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audit deny capability net_bind_service,
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signal (send) set=(term,kill),
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signal (receive) set=(int,quit,term),
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signal (receive) set=(cont,hup) peer=sudo,
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# unknown, needs to be cleared up; TODO
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unix (bind) type=dgram,
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network netlink raw,
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dbus (send) bus=system path=/org/freedesktop/login[0-9]
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interface=org.freedesktop.login[0-9].Manager
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member={CreateSession,ReleaseSession},
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@{exec_path} mr,
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# Shells to use
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/{usr/,}bin/{,b,d,rb}ash rpux,
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/{usr/,}bin/{c,k,tc,z}sh rpux,
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# Fake shells to politely refuse a login
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#/{usr/,}{s,}bin/nologin rpux,
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/{usr/,}bin/{,b,d,rb}ash rUx,
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/{usr/,}bin/{c,k,tc,z}sh rUx,
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/{usr/,}{s,}bin/nologin rPx,
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/etc/default/locale r,
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/etc/environment r,
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/etc/security/limits.d/ r,
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/etc/shells r,
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@{PROC}/1/limits r,
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owner @{PROC}/@{pids}/loginuid r,
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owner @{PROC}/@{pids}/cgroup r,
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owner @{PROC}/@{pids}/mountinfo r,
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# For pam_securetty
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@{PROC}/cmdline r,
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@{PROC}/1/limits r,
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@{PROC}/cmdline r,
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@{sys}/devices/virtual/tty/console/active r,
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/dev/{,pts/}ptmx rw,
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@ -1,5 +1,5 @@
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# apparmor.d - Full set of apparmor profiles
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# Copyright (C) 2019-2021 Mikhail Morfikov
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# Copyright (C) 2019-2022 Mikhail Morfikov
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# Copyright (C) 2022 Alexandre Pujol <alexandre@pujol.io>
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# SPDX-License-Identifier: GPL-2.0-only
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@ -7,11 +7,10 @@ abi <abi/3.0>,
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include <tunables/global>
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@{PATH} = /usr/local/sbin /usr/local/bin /usr/sbin /usr/bin /sbin /bin
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@{exec_path} = /{usr/,}bin/sudo
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profile sudo @{exec_path} {
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include <abstractions/base>
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include <abstractions/app-launcher-root>
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include <abstractions/authentication>
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include <abstractions/consoles>
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include <abstractions/nameservice-strict>
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@ -30,57 +29,49 @@ profile sudo @{exec_path} {
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capability sys_resource,
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network netlink raw, # PAM
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# DNS query?
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# network inet dgram,
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# network inet6 dgram,
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ptrace (read),
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signal,
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# signal,
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signal (send) set=(cont,hup) peer=su,
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@{exec_path} mr,
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@{libexec}/sudo/** mr,
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# Shells to use
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/{usr/,}bin/{,b,d,rb}ash rpux,
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/{usr/,}bin/{c,k,tc,z}sh rpux,
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@{PATH}/[a-z0-9]* rPUx,
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/{usr/,}lib/cockpit/cockpit-askpass rPUx,
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/{usr/,}lib/molly-guard/molly-guard rPx,
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@{libexec}/sudo/** mr,
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/{usr/,}bin/{,b,d,rb}ash rUx,
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/{usr/,}bin/{c,k,tc,z}sh rUx,
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/{usr/,}lib/cockpit/cockpit-askpass rPx,
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/{usr/,}lib/molly-guard/molly-guard rPx,
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/etc/default/locale r,
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/etc/environment r,
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/etc/machine-id r,
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/etc/security/limits.d/{,*} r,
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/etc/sudo.conf r,
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/etc/sudoers r,
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/etc/sudoers.d/{,*} r,
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/etc/default/locale r,
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/var/log/sudo.log wk,
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/var/log/sudo.log wk,
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owner /var/lib/sudo/lectured/* rw,
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owner @{HOME}/.sudo_as_admin_successful rw,
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owner @{HOME}/.xsession-errors w,
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# For timestampdir
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owner @{run}/sudo/ rw,
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owner @{run}/sudo/ts/ rw,
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owner @{run}/sudo/ts/* rwk,
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@{run}/faillock/{,*} rwk,
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@{run}/resolvconf/resolv.conf r,
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@{PROC}/@{pids}/fd/ r,
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@{PROC}/@{pids}/stat r,
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@{PROC}/1/limits r,
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@{PROC}/sys/kernel/seccomp/actions_avail r,
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# File Inherit
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owner /dev/tty[0-9]* rw,
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owner @{HOME}/.xsession-errors w,
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owner /var/lib/sudo/lectured/* rw,
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owner @{HOME}/.sudo_as_admin_successful rw,
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@{run}/resolvconf/resolv.conf r,
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/dev/ r, # interactive login
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/dev/ptmx rw,
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/dev/ r, # interactive login
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/dev/ptmx rw,
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deny @{user_share_dirs}/gvfs-metadata/* r,
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