/etc/apparmor.d/usr.sbin.cupsd is in cups 1.5.2-9ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Last Modified: Thu Aug 2 12:54:46 2007
# Author: Martin Pitt <martin.pitt@ubuntu.com>
#include <tunables/global>
/usr/sbin/cupsd {
#include <abstractions/base>
#include <abstractions/bash>
#include <abstractions/authentication>
#include <abstractions/dbus>
#include <abstractions/fonts>
#include <abstractions/nameservice>
#include <abstractions/perl>
#include <abstractions/user-tmp>
capability chown,
capability fowner,
capability fsetid,
capability kill,
capability net_bind_service,
capability setgid,
capability setuid,
# nasty, but we limit file access pretty tightly, and cups chowns a
# lot of files to 'lp' which it cannot read/write afterwards any
# more
capability dac_override,
# the bluetooth backend needs this
network bluetooth,
# the dnssd backend uses those
network x25 seqpacket,
network ax25 dgram,
network netrom seqpacket,
network rose dgram,
network ipx dgram,
network appletalk dgram,
network econet dgram,
network ash dgram,
/bin/bash ixr,
/bin/dash ixr,
/bin/hostname ixr,
/dev/lp* rw,
deny /dev/tty rw, # silence noise
/dev/ttyS* rw,
/dev/ttyUSB* rw,
/dev/usb/lp* rw,
/dev/bus/usb/ r,
/dev/bus/usb/** rw,
/dev/parport* rw,
/etc/cups/ rw,
/etc/cups/** rw,
/etc/foomatic/* r,
/etc/gai.conf r,
/etc/papersize r,
/etc/pnm2ppa.conf r,
/etc/printcap rwl,
/etc/ssl/** r,
@{PROC}/net/ r,
@{PROC}/net/* r,
@{PROC}/sys/dev/parport/** r,
@{PROC}/*/net/ r,
@{PROC}/*/net/** r,
@{PROC}/*/auxv r,
@{PROC}/sys/crypto/** r,
/sys/** r,
/usr/bin/* ixr,
/usr/sbin/* ixr,
/bin/* ixr,
/sbin/* ixr,
/usr/lib/** rm,
# backends which come with CUPS can be confined
/usr/lib/cups/backend/bluetooth ixr,
/usr/lib/cups/backend/dnssd ixr,
/usr/lib/cups/backend/http ixr,
/usr/lib/cups/backend/ipp ixr,
/usr/lib/cups/backend/lpd ixr,
/usr/lib/cups/backend/parallel ixr,
/usr/lib/cups/backend/serial ixr,
/usr/lib/cups/backend/snmp ixr,
/usr/lib/cups/backend/socket ixr,
/usr/lib/cups/backend/usb ixr,
# we treat cups-pdf specially, since it needs to write into /home
# and thus needs extra paranoia
/usr/lib/cups/backend/cups-pdf Px,
# third party backends get no restrictions as they often need high
# privileges and this is beyond our control
/usr/lib/cups/backend/* Ux,
/usr/lib/cups/cgi-bin/* ixr,
/usr/lib/cups/daemon/* ixr,
/usr/lib/cups/monitor/* ixr,
/usr/lib/cups/notifier/* ixr,
# filters and drivers (PPD generators) are always run as non-root,
# and there are a lot of third-party drivers which we cannot predict
/usr/lib/cups/filter/** Uxr,
/usr/lib/cups/driver/* Uxr,
/usr/local/** rm,
/usr/local/lib/cups/** rix,
/usr/share/** r,
/{,var/}run/** rm,
/{,var/}run/avahi-daemon/socket rw,
deny /{,var/}run/samba/ rw,
/{,var/}run/samba/** rw,
/{,var/}run/cups/ rw,
/{,var/}run/cups/** rw,
/var/cache/cups/ rw,
/var/cache/cups/** rwk,
/var/log/cups/ rw,
/var/log/cups/* rw,
/var/spool/cups/ rw,
/var/spool/cups/** rw,
# third-party printer drivers; no known structure here
/opt/** rix,
# FIXME: no policy ATM for hplip and Brother drivers
/usr/bin/hpijs Ux,
/usr/Brother/** Ux,
# Kerberos authentication
/etc/krb5.conf r,
deny /etc/krb5.conf w,
/etc/krb5.keytab rk,
/etc/cups/krb5.keytab rwk,
/tmp/krb5cc* k,
# likewise authentication
/etc/likewise r,
/etc/likewise/* r,
# Site-specific additions and overrides. See local/README for details.
#include <local/usr.sbin.cupsd>
}
# separate profile since this needs to write into /home
/usr/lib/cups/backend/cups-pdf {
#include <abstractions/base>
#include <abstractions/fonts>
#include <abstractions/nameservice>
#include <abstractions/user-tmp>
capability chown,
capability fowner,
capability fsetid,
capability setgid,
capability setuid,
# unfortunate, but required for when $HOME is 700
capability dac_override,
capability dac_read_search,
/bin/dash ixr,
/bin/bash ixr,
/bin/cp ixr,
/etc/papersize r,
/etc/cups/cups-pdf.conf r,
@{HOME}/PDF/ rw,
@{HOME}/PDF/* rw,
/usr/bin/gs ixr,
/usr/lib/cups/backend/cups-pdf mr,
/usr/lib/ghostscript/** mr,
/usr/share/** r,
/var/log/cups/cups-pdf_log w,
/var/spool/cups/** r,
/var/spool/cups-pdf/** rw,
}
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