58b3029576
Define new netlink socket security classes introduced by kernel commit 223ae516404a7a65f09e79a1c0291521c233336e. Note that this does not remove the long-since obsolete netlink_firewall_socket and netlink_ip6_fw_socket classes from refpolicy in case they are still needed for legacy distribution policies. Add the new socket classes to socket_class_set. Update ubac and mls constraints for the new socket classes. Add allow rules for a few specific known cases (netutils, iptables, netlabel, ifconfig, udev) in core policy that require access. Further refinement for the contrib tree will be needed. Any allow rule previously written on :netlink_socket may need to be rewritten or duplicated for one of the more specific classes. For now, we retain the existing :netlink_socket rules for compatibility on older kernels. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
250 lines
6.4 KiB
Plaintext
250 lines
6.4 KiB
Plaintext
|
|
#
|
|
# Define the constraints
|
|
#
|
|
# constrain class_set perm_set expression ;
|
|
#
|
|
# expression : ( expression )
|
|
# | not expression
|
|
# | expression and expression
|
|
# | expression or expression
|
|
# | u1 op u2
|
|
# | r1 role_op r2
|
|
# | t1 op t2
|
|
# | u1 op names
|
|
# | u2 op names
|
|
# | r1 op names
|
|
# | r2 op names
|
|
# | t1 op names
|
|
# | t2 op names
|
|
#
|
|
# op : == | !=
|
|
# role_op : == | != | eq | dom | domby | incomp
|
|
#
|
|
# names : name | { name_list }
|
|
# name_list : name | name_list name
|
|
#
|
|
|
|
define(`basic_ubac_conditions',`
|
|
ifdef(`enable_ubac',`
|
|
u1 == u2
|
|
or u1 == system_u
|
|
or u2 == system_u
|
|
or t1 != ubac_constrained_type
|
|
or t2 != ubac_constrained_type
|
|
')
|
|
')
|
|
|
|
define(`basic_ubac_constraint',`
|
|
ifdef(`enable_ubac',`
|
|
constrain $1 all_$1_perms
|
|
(
|
|
basic_ubac_conditions
|
|
);
|
|
')
|
|
')
|
|
|
|
define(`exempted_ubac_constraint',`
|
|
ifdef(`enable_ubac',`
|
|
constrain $1 all_$1_perms
|
|
(
|
|
basic_ubac_conditions
|
|
or t1 == $2
|
|
);
|
|
')
|
|
')
|
|
|
|
########################################
|
|
#
|
|
# File rules
|
|
#
|
|
|
|
exempted_ubac_constraint(dir, ubacfile)
|
|
exempted_ubac_constraint(file, ubacfile)
|
|
exempted_ubac_constraint(lnk_file, ubacfile)
|
|
exempted_ubac_constraint(fifo_file, ubacfile)
|
|
exempted_ubac_constraint(sock_file, ubacfile)
|
|
exempted_ubac_constraint(chr_file, ubacfile)
|
|
exempted_ubac_constraint(blk_file, ubacfile)
|
|
|
|
# SELinux object identity change constraint:
|
|
constrain dir_file_class_set { create relabelto relabelfrom }
|
|
(
|
|
u1 == u2
|
|
or t1 == can_change_object_identity
|
|
);
|
|
|
|
########################################
|
|
#
|
|
# Process rules
|
|
#
|
|
|
|
ifdef(`enable_ubac',`
|
|
constrain process { sigchld sigkill sigstop signull signal ptrace getsched setsched getsession getpgid setpgid getcap setcap share getattr setrlimit }
|
|
(
|
|
basic_ubac_conditions
|
|
or t1 == ubacproc
|
|
);
|
|
')
|
|
|
|
constrain process { transition dyntransition noatsecure siginh rlimitinh }
|
|
(
|
|
u1 == u2
|
|
or ( t1 == can_change_process_identity and t2 == process_user_target )
|
|
or ( t1 == cron_source_domain and ( t2 == cron_job_domain or u2 == system_u ) )
|
|
or ( t1 == can_system_change and u2 == system_u )
|
|
or ( t1 == process_uncond_exempt )
|
|
);
|
|
|
|
constrain process { transition dyntransition noatsecure siginh rlimitinh }
|
|
(
|
|
r1 == r2
|
|
or ( t1 == can_change_process_role and t2 == process_user_target )
|
|
or ( t1 == cron_source_domain and t2 == cron_job_domain )
|
|
or ( t1 == can_system_change and r2 == system_r )
|
|
or ( t1 == process_uncond_exempt )
|
|
);
|
|
|
|
# These permissions do not have ubac constraints:
|
|
# fork
|
|
# setexec
|
|
# setfscreate
|
|
# setcurrent
|
|
# execmem
|
|
# execstack
|
|
# execheap
|
|
# setkeycreate
|
|
# setsockcreate
|
|
|
|
########################################
|
|
#
|
|
# File descriptor rules
|
|
#
|
|
|
|
exempted_ubac_constraint(fd, ubacfd)
|
|
|
|
########################################
|
|
#
|
|
# Socket rules
|
|
#
|
|
|
|
exempted_ubac_constraint(socket, ubacsock)
|
|
exempted_ubac_constraint(tcp_socket, ubacsock)
|
|
exempted_ubac_constraint(udp_socket, ubacsock)
|
|
exempted_ubac_constraint(rawip_socket, ubacsock)
|
|
exempted_ubac_constraint(netlink_socket, ubacsock)
|
|
exempted_ubac_constraint(packet_socket, ubacsock)
|
|
exempted_ubac_constraint(key_socket, ubacsock)
|
|
exempted_ubac_constraint(unix_stream_socket, ubacsock)
|
|
exempted_ubac_constraint(unix_dgram_socket, ubacsock)
|
|
exempted_ubac_constraint(netlink_route_socket, ubacsock)
|
|
exempted_ubac_constraint(netlink_firewall_socket, ubacsock)
|
|
exempted_ubac_constraint(netlink_tcpdiag_socket, ubacsock)
|
|
exempted_ubac_constraint(netlink_nflog_socket, ubacsock)
|
|
exempted_ubac_constraint(netlink_xfrm_socket, ubacsock)
|
|
exempted_ubac_constraint(netlink_selinux_socket, ubacsock)
|
|
exempted_ubac_constraint(netlink_audit_socket, ubacsock)
|
|
exempted_ubac_constraint(netlink_ip6fw_socket, ubacsock)
|
|
exempted_ubac_constraint(netlink_dnrt_socket, ubacsock)
|
|
exempted_ubac_constraint(netlink_kobject_uevent_socket, ubacsock)
|
|
exempted_ubac_constraint(appletalk_socket, ubacsock)
|
|
exempted_ubac_constraint(dccp_socket, ubacsock)
|
|
exempted_ubac_constraint(tun_socket, ubacsock)
|
|
exempted_ubac_constraint(netlink_iscsi_socket, ubacsock)
|
|
exempted_ubac_constraint(netlink_fib_lookup_socket, ubacsock)
|
|
exempted_ubac_constraint(netlink_connector_socket, ubacsock)
|
|
exempted_ubac_constraint(netlink_netfilter_socket, ubacsock)
|
|
exempted_ubac_constraint(netlink_generic_socket, ubacsock)
|
|
exempted_ubac_constraint(netlink_scsitransport_socket, ubacsock)
|
|
exempted_ubac_constraint(netlink_rdma_socket, ubacsock)
|
|
exempted_ubac_constraint(netlink_crypto_socket, ubacsock)
|
|
|
|
constrain socket_class_set { create relabelto relabelfrom }
|
|
(
|
|
u1 == u2
|
|
or t1 == can_change_object_identity
|
|
);
|
|
|
|
########################################
|
|
#
|
|
# SysV IPC rules
|
|
|
|
exempted_ubac_constraint(sem, ubacipc)
|
|
exempted_ubac_constraint(msg, ubacipc)
|
|
exempted_ubac_constraint(msgq, ubacipc)
|
|
exempted_ubac_constraint(shm, ubacipc)
|
|
exempted_ubac_constraint(ipc, ubacipc)
|
|
|
|
########################################
|
|
#
|
|
# SE-X Windows rules
|
|
#
|
|
|
|
exempted_ubac_constraint(x_drawable, ubacxwin)
|
|
exempted_ubac_constraint(x_screen, ubacxwin)
|
|
exempted_ubac_constraint(x_gc, ubacxwin)
|
|
exempted_ubac_constraint(x_font, ubacxwin)
|
|
exempted_ubac_constraint(x_colormap, ubacxwin)
|
|
exempted_ubac_constraint(x_property, ubacxwin)
|
|
exempted_ubac_constraint(x_selection, ubacxwin)
|
|
exempted_ubac_constraint(x_cursor, ubacxwin)
|
|
exempted_ubac_constraint(x_client, ubacxwin)
|
|
exempted_ubac_constraint(x_device, ubacxwin)
|
|
exempted_ubac_constraint(x_server, ubacxwin)
|
|
exempted_ubac_constraint(x_extension, ubacxwin)
|
|
exempted_ubac_constraint(x_resource, ubacxwin)
|
|
exempted_ubac_constraint(x_event, ubacxwin)
|
|
exempted_ubac_constraint(x_synthetic_event, ubacxwin)
|
|
exempted_ubac_constraint(x_application_data, ubacxwin)
|
|
|
|
########################################
|
|
#
|
|
# D-BUS rules
|
|
#
|
|
|
|
exempted_ubac_constraint(dbus, ubacdbus)
|
|
|
|
########################################
|
|
#
|
|
# Key rules
|
|
#
|
|
|
|
exempted_ubac_constraint(key, ubackey)
|
|
|
|
########################################
|
|
#
|
|
# Database rules
|
|
#
|
|
|
|
exempted_ubac_constraint(db_database, ubacdb)
|
|
exempted_ubac_constraint(db_table, ubacdb)
|
|
exempted_ubac_constraint(db_procedure, ubacdb)
|
|
exempted_ubac_constraint(db_column, ubacdb)
|
|
exempted_ubac_constraint(db_tuple, ubacdb)
|
|
exempted_ubac_constraint(db_blob, ubacdb)
|
|
|
|
|
|
|
|
basic_ubac_constraint(association)
|
|
basic_ubac_constraint(peer)
|
|
|
|
|
|
# these classes have no UBAC restrictions
|
|
#class security
|
|
#class system
|
|
#class capability
|
|
#class memprotect
|
|
#class passwd # userspace
|
|
#class node
|
|
#class netif
|
|
#class packet
|
|
#class capability2
|
|
#class nscd # userspace
|
|
#class context # userspace
|
|
|
|
|
|
|
|
undefine(`basic_ubac_constraint')
|
|
undefine(`basic_ubac_conditions')
|
|
undefine(`exempted_ubac_constraint')
|