121 lines
3.2 KiB
Text
121 lines
3.2 KiB
Text
# apparmor.d - Full set of apparmor profiles
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# Copyright (C) 2002-2005 Novell/SUSE
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# Copyright (C) 2012 Canonical Ltd.
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# Copyright (C) 2015-2016 Simon Deziel
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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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# Adapted from https://gitlab.com/apparmor/apparmor/-/blob/master/profiles/apparmor/profiles/extras/usr.sbin.sshd
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# As SSH is used to administrate a server this is limited.
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# If you want real protection disallow SSH access.
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abi <abi/3.0>,
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include <tunables/global>
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@{exec_path} = /{usr/,}{s,}bin/sshd
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profile sshd @{exec_path} flags=(attach_disconnected) {
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include <abstractions/base>
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include <abstractions/authentication>
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include <abstractions/consoles>
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include <abstractions/hosts_access>
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include <abstractions/nameservice-strict>
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include <abstractions/openssl>
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include <abstractions/ssl_certs>
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include <abstractions/wutmp>
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capability audit_write,
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capability chown,
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capability dac_read_search,
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capability kill,
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capability net_bind_service,
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capability setgid,
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capability setuid,
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capability sys_chroot,
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capability sys_resource,
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# sshd doesn't require net_admin. libpam-systemd tries to
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# use it if available to set the send/receive buffers size,
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# but will fall back to a non-privileged version if it fails.
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deny capability net_admin,
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ptrace (read,trace) peer=unconfined,
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network inet stream,
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network inet6 stream,
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network inet dgram,
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network inet6 dgram,
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network netlink raw,
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@{exec_path} mrix,
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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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/{usr/,}bin/passwd rPx,
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/{usr/,}lib/openssh/sftp-server rPx,
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/{usr/,}bin/false rix,
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/etc/default/locale r,
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/etc/environment r,
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/etc/gss/mech.d/{,*} r,
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/etc/security/limits.d/ r,
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/etc/motd r,
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/etc/ssh/ssh_host_* r,
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/etc/ssh/sshd_config r,
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/etc/ssh/sshd_config.d/{,*} r,
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# For scp
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owner @{HOME}/@{XDG_DOWNLOAD_DIR}/{,**} rwl,
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owner @{user_sync_dirs}/{,**} rwl,
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owner @{HOME}/@{XDG_SSH_DIR}/authorized_keys{,.*} r,
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owner @{run}/sshd{,.init}.pid wl,
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@{run}/motd.dynamic rw,
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@{run}/motd.dynamic.new rw,
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@{run}/resolvconf/resolv.conf r,
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@{run}/systemd/sessions/*.ref rw,
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@{run}/systemd/notify w,
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@{sys}/fs/cgroup/*/user/*/[0-9]*/ rw,
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@{sys}/fs/cgroup/systemd/user.slice/user-@{uid}.slice/session-*.scope/ rw,
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owner @{PROC}/@{pid}/limits r,
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owner @{PROC}/@{pid}/loginuid rw,
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owner @{PROC}/@{pid}/mounts r,
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owner @{PROC}/@{pid}/oom_adj rw,
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owner @{PROC}/@{pid}/oom_score_adj rw,
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owner @{PROC}/@{pid}/uid_map r,
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@{PROC}/@{pids}/fd/ r,
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@{PROC}/1/environ r,
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@{PROC}/cmdline r,
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@{PROC}/filesystems r,
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@{PROC}/sys/kernel/ngroups_max r,
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/dev/ptmx rw,
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@{run}/systemd/userdb/io.systemd.DynamicUser w,
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# DBus
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@{run}/dbus/system_bus_socket rw,
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dbus send
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bus=system
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path=/org/freedesktop/DBus
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interface=org.freedesktop.DBus
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member=Hello
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peer=(name=org.freedesktop.DBus),
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dbus send
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bus=system
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path=/org/freedesktop/login1
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interface=org.freedesktop.login1.Manager
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member={CreateSession,ReleaseSession}
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peer=(name=org.freedesktop.login1),
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include if exists <local/sshd>
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}
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