apparmor.d/profiles/chfn

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# apparmor.d - Full set of apparmor profiles
# Copyright (C) 2019-2021 Mikhail Morfikov
# SPDX-License-Identifier: GPL-2.0-only
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abi <abi/3.0>,
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include <tunables/global>
@{exec_path} = /{usr/,}bin/chfn
profile chfn @{exec_path} {
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include <abstractions/base>
include <abstractions/consoles>
include <abstractions/nameservice-strict>
include <abstractions/authentication>
include <abstractions/wutmp>
# To write records to the kernel auditing log.
capability audit_write,
# To set the right permission to the files in the /etc/ dir.
capability chown,
capability fsetid,
# chfn is a SETUID binary
capability setuid,
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network netlink raw,
@{exec_path} mr,
owner @{PROC}/@{pid}/loginuid r,
/etc/passwd rw,
/etc/passwd- w,
/etc/passwd+ rw,
/etc/passwd.@{pid} w,
/etc/passwd.lock wl -> /etc/passwd.@{pid},
/etc/shadow r,
# A process first uses lckpwdf() to lock the lock file, thereby gaining exclusive rights to
# modify the /etc/passwd or /etc/shadow password database.
/etc/.pwd.lock rwk,
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include if exists <local/chfn>
}