selinux-policy/policy/modules/services/squid.te

policy_module(squid, 1.10.0)

########################################
#
# Declarations
#

## <desc>
##	<p>
##	Allow squid to connect to all ports, not just
##	HTTP, FTP, and Gopher ports.
##	</p>
## </desc>
gen_tunable(squid_connect_any, false)

## <desc>
##	<p>
##	Allow squid to run as a transparent proxy (TPROXY)
##	</p>
## </desc>
gen_tunable(squid_use_tproxy, false)

type squid_t;
type squid_exec_t;
init_daemon_domain(squid_t, squid_exec_t)

# type for /var/cache/squid
type squid_cache_t;
files_type(squid_cache_t)

type squid_conf_t;
files_type(squid_conf_t)

type squid_initrc_exec_t;
init_script_file(squid_initrc_exec_t)

type squid_log_t;
logging_log_file(squid_log_t)

type squid_tmpfs_t;
files_tmpfs_file(squid_tmpfs_t)

type squid_var_run_t;
files_pid_file(squid_var_run_t)

########################################
#
# Local policy
#

allow squid_t self:capability { setgid kill setuid dac_override sys_resource };
dontaudit squid_t self:capability sys_tty_config;
allow squid_t self:process ~{ ptrace setcurrent setexec setfscreate execmem execstack execheap };
allow squid_t self:fifo_file rw_fifo_file_perms;
allow squid_t self:sock_file read_sock_file_perms;
allow squid_t self:fd use;
allow squid_t self:shm create_shm_perms;
allow squid_t self:sem create_sem_perms;
allow squid_t self:msgq create_msgq_perms;
allow squid_t self:msg { send receive };
allow squid_t self:unix_stream_socket create_stream_socket_perms;
allow squid_t self:unix_dgram_socket create_socket_perms;
allow squid_t self:unix_dgram_socket sendto;
allow squid_t self:unix_stream_socket connectto;
allow squid_t self:tcp_socket create_stream_socket_perms;
allow squid_t self:udp_socket create_socket_perms;

# Grant permissions to create, access, and delete cache files.
manage_dirs_pattern(squid_t, squid_cache_t, squid_cache_t)
manage_files_pattern(squid_t, squid_cache_t, squid_cache_t)
manage_lnk_files_pattern(squid_t, squid_cache_t, squid_cache_t)

allow squid_t squid_conf_t:dir list_dir_perms;
read_files_pattern(squid_t, squid_conf_t, squid_conf_t)
read_lnk_files_pattern(squid_t, squid_conf_t, squid_conf_t)

can_exec(squid_t, squid_exec_t)

manage_dirs_pattern(squid_t, squid_log_t, squid_log_t)
manage_files_pattern(squid_t, squid_log_t, squid_log_t)
manage_lnk_files_pattern(squid_t, squid_log_t, squid_log_t)
logging_log_filetrans(squid_t, squid_log_t, { file dir })

#squid requires the following when run in diskd mode, the recommended setting
manage_files_pattern(squid_t, squid_tmpfs_t, squid_tmpfs_t)
fs_tmpfs_filetrans(squid_t, squid_tmpfs_t, file)

manage_files_pattern(squid_t, squid_var_run_t, squid_var_run_t)
files_pid_filetrans(squid_t, squid_var_run_t, file)

kernel_read_kernel_sysctls(squid_t)
kernel_read_system_state(squid_t)

files_dontaudit_getattr_boot_dirs(squid_t)

corenet_all_recvfrom_unlabeled(squid_t)
corenet_all_recvfrom_netlabel(squid_t)
corenet_tcp_sendrecv_generic_if(squid_t)
corenet_udp_sendrecv_generic_if(squid_t)
corenet_tcp_sendrecv_generic_node(squid_t)
corenet_udp_sendrecv_generic_node(squid_t)
corenet_tcp_sendrecv_all_ports(squid_t)
corenet_udp_sendrecv_all_ports(squid_t)
corenet_tcp_bind_generic_node(squid_t)
corenet_udp_bind_generic_node(squid_t)
corenet_tcp_bind_http_port(squid_t)
corenet_tcp_bind_http_cache_port(squid_t)
corenet_udp_bind_http_cache_port(squid_t)
corenet_tcp_bind_ftp_port(squid_t)
corenet_tcp_bind_gopher_port(squid_t)
corenet_udp_bind_gopher_port(squid_t)
corenet_tcp_bind_squid_port(squid_t)
corenet_udp_bind_squid_port(squid_t)
corenet_udp_bind_wccp_port(squid_t)
corenet_tcp_connect_ftp_port(squid_t)
corenet_tcp_connect_gopher_port(squid_t)
corenet_tcp_connect_http_port(squid_t)
corenet_tcp_connect_http_cache_port(squid_t)
corenet_tcp_connect_pgpkeyserver_port(squid_t)
corenet_sendrecv_ftp_client_packets(squid_t)
corenet_sendrecv_gopher_client_packets(squid_t)
corenet_sendrecv_http_client_packets(squid_t)
corenet_sendrecv_http_server_packets(squid_t)
corenet_sendrecv_http_cache_server_packets(squid_t)
corenet_sendrecv_http_cache_client_packets(squid_t)
corenet_sendrecv_pgpkeyserver_client_packets(squid_t)
corenet_sendrecv_squid_client_packets(squid_t)
corenet_sendrecv_squid_server_packets(squid_t)
corenet_sendrecv_wccp_server_packets(squid_t)

dev_read_sysfs(squid_t)
dev_read_urand(squid_t)

fs_getattr_all_fs(squid_t)
fs_search_auto_mountpoints(squid_t)
fs_list_inotifyfs(squid_t)

selinux_dontaudit_getattr_dir(squid_t)

term_dontaudit_getattr_pty_dirs(squid_t)

# to allow running programs from /usr/lib/squid (IE unlinkd)
corecmd_exec_bin(squid_t)
corecmd_exec_shell(squid_t)

domain_use_interactive_fds(squid_t)

files_read_etc_files(squid_t)
files_read_etc_runtime_files(squid_t)
files_read_usr_files(squid_t)
files_search_spool(squid_t)
files_dontaudit_getattr_tmp_dirs(squid_t)
files_getattr_home_dir(squid_t)

auth_use_nsswitch(squid_t)
auth_domtrans_chk_passwd(squid_t)

# to allow running programs from /usr/lib/squid (IE unlinkd)
libs_exec_lib_files(squid_t)

logging_send_syslog_msg(squid_t)

miscfiles_read_generic_certs(squid_t)
miscfiles_read_localization(squid_t)

userdom_use_unpriv_users_fds(squid_t)
userdom_dontaudit_search_user_home_dirs(squid_t)

tunable_policy(`squid_connect_any',`
	corenet_tcp_connect_all_ports(squid_t)
	corenet_tcp_bind_all_ports(squid_t)
	corenet_sendrecv_all_packets(squid_t)
')

tunable_policy(`squid_use_tproxy',`
	allow squid_t self:capability net_admin;
	corenet_tcp_bind_netport_port(squid_t)
')

optional_policy(`
	apache_content_template(squid)

	allow httpd_squid_script_t self:tcp_socket create_socket_perms;

	corenet_all_recvfrom_unlabeled(httpd_squid_script_t)
	corenet_all_recvfrom_netlabel(httpd_squid_script_t)
	corenet_tcp_connect_http_cache_port(httpd_squid_script_t)

	sysnet_dns_name_resolve(httpd_squid_script_t)

	squid_read_config(httpd_squid_script_t)
')

optional_policy(`
	cron_system_entry(squid_t, squid_exec_t)
')

optional_policy(`
	samba_domtrans_winbind_helper(squid_t)
')

optional_policy(`
	seutil_sigchld_newrole(squid_t)
')

optional_policy(`
	udev_read_db(squid_t)
')