diff --git a/refpolicy/Changelog b/refpolicy/Changelog index f7a9cb5..81420bd 100644 --- a/refpolicy/Changelog +++ b/refpolicy/Changelog @@ -12,6 +12,7 @@ logwatch (Dan Walsh) openct readahead + screen slrnpull smartmon sysstat diff --git a/refpolicy/policy/modules/apps/screen.fc b/refpolicy/policy/modules/apps/screen.fc new file mode 100644 index 0000000..92211c9 --- /dev/null +++ b/refpolicy/policy/modules/apps/screen.fc @@ -0,0 +1,15 @@ +# +# /home +# +HOME_DIR/\.screenrc -- gen_context(system_u:object_r:ROLE_screen_ro_home_t,s0) + +# +# /usr +# +/usr/bin/screen -- gen_context(system_u:object_r:screen_exec_t,s0) + +# +# /var +# +/var/run/screens?/S-[^/]+ -d gen_context(system_u:object_r:screen_dir_t,s0) +/var/run/screens?/S-[^/]+/.* <> diff --git a/refpolicy/policy/modules/apps/screen.if b/refpolicy/policy/modules/apps/screen.if new file mode 100644 index 0000000..ed2c793 --- /dev/null +++ b/refpolicy/policy/modules/apps/screen.if @@ -0,0 +1,195 @@ +## GNU terminal multiplexer + +####################################### +## +## The per user domain template for the screen module. +## +## +##

+## This template creates a derived domains which are used +## for screen sessions. +##

+##

+## This template is invoked automatically for each user, and +## generally does not need to be invoked directly +## by policy writers. +##

+##
+## +## The prefix of the user domain (e.g., user +## is the prefix for user_t). +## +## +## The type of the user domain. +## +## +## The role associated with the user domain. +## +# +template(`screen_per_userdomain_template',` + gen_require(` + type screen_dir_t, screen_exec_t; + ') + + ######################################## + # + # Declarations + # + + type $1_screen_t; + domain_type($1_screen_t) + domain_entry_file($1_screen_t,screen_exec_t) + domain_wide_inherit_fd($1_screen_t) + role $2 types $1_screen_t; + + type $1_screen_tmp_t; + files_tmp_file($1_screen_tmp_t) + + type $1_screen_ro_home_t; + files_type($1_screen_ro_home_t) + + type $1_screen_var_run_t;; + files_pid_file($1_screen_var_run_t) + + ######################################## + # + # Local policy + # + + allow $1_screen_t self:capability { setuid setgid fsetid }; + allow $1_screen_t self:process signal_perms; + allow $1_screen_t self:tcp_socket create_stream_socket_perms; + allow $1_screen_t self:udp_socket create_socket_perms; + # Internal screen networking + allow $1_screen_t self:fd use; + allow $1_screen_t self:unix_stream_socket create_socket_perms; + allow $1_screen_t self:unix_dgram_socket create_socket_perms; + + allow $1_screen_t $1_screen_tmp_t:dir create_dir_perms; + allow $1_screen_t $1_screen_tmp_t:file create_file_perms; + allow $1_screen_t $1_screen_tmp_t:fifo_file create_file_perms; + files_create_tmp_files($1_screen_t, $1_screen_tmp_t, { file dir }) + + # Create fifo + allow $1_screen_t screen_dir_t:dir rw_dir_perms; + allow $1_screen_t screen_dir_t:dir create_dir_perms; + allow $1_screen_t $1_screen_var_run_t:fifo_file create_file_perms; + type_transition $1_screen_t screen_dir_t:fifo_file $1_screen_var_run_t; + files_create_pid($1_screen_t,screen_dir_t,dir) + + allow $1_screen_t $1_screen_ro_home_t:dir r_dir_perms; + allow $1_screen_t $1_screen_ro_home_t:file r_file_perms; + allow $1_screen_t $1_screen_ro_home_t:lnk_file { read getattr }; + + domain_auto_trans($2, screen_exec_t, $1_screen_t) + allow $2 $1_screen_t:process signal; + allow $1_screen_t $2:process signal; + allow $1_screen_t $2:fifo_file rw_file_perms; + allow $1_screen_t $1_home_dir_t:dir { search getattr }; + + allow $2 $1_screen_ro_home_t:dir create_dir_perms; + allow $2 $1_screen_ro_home_t:file create_file_perms; + allow $2 $1_screen_ro_home_t:lnk_file create_lnk_perms; + allow $2 $1_screen_ro_home_t:{ dir file lnk_file } { relabelfrom relabelto }; + + kernel_read_system_state($1_screen_t) + kernel_read_kernel_sysctl($1_screen_t) + + corecmd_list_bin($1_screen_t) + corecmd_read_bin_file($1_screen_t) + corecmd_read_bin_symlink($1_screen_t) + corecmd_read_bin_pipe($1_screen_t) + corecmd_read_bin_socket($1_screen_t) + corecmd_list_sbin($1_screen_t) + corecmd_read_sbin_symlink($1_screen_t) + corecmd_read_sbin_file($1_screen_t) + corecmd_read_sbin_pipe($1_screen_t) + corecmd_read_sbin_socket($1_screen_t) + # Revert to the user domain when a shell is executed. + corecmd_shell_domtrans($1_screen_t,$2) + corecmd_bin_domtrans($1_screen_t,$2) + + corenet_tcp_sendrecv_generic_if($1_screen_t) + corenet_udp_sendrecv_generic_if($1_screen_t) + corenet_raw_sendrecv_generic_if($1_screen_t) + corenet_tcp_sendrecv_all_nodes($1_screen_t) + corenet_udp_sendrecv_all_nodes($1_screen_t) + corenet_raw_sendrecv_all_nodes($1_screen_t) + corenet_tcp_sendrecv_all_ports($1_screen_t) + corenet_udp_sendrecv_all_ports($1_screen_t) + corenet_tcp_bind_all_nodes($1_screen_t) + corenet_udp_bind_all_nodes($1_screen_t) + corenet_tcp_connect_all_ports($1_screen_t) + + dev_dontaudit_getattr_all_chr_files($1_screen_t) + dev_dontaudit_getattr_all_blk_files($1_screen_t) + # for SSP + dev_read_urand($1_screen_t) + + domain_use_wide_inherit_fd($1_screen_t) + + files_search_tmp($1_screen_t) + files_search_home($1_screen_t) + files_list_home($1_screen_t) + files_read_usr_files($1_screen_t) + files_read_etc_files($1_screen_t) + + fs_search_auto_mountpoints($1_screen_t) + fs_getattr_xattr_fs($1_screen_t) + + auth_dontaudit_getattr_shadow($1_screen_t) + auth_dontaudit_exec_utempter($1_screen_t) + + # Write to utmp. + init_rw_script_pid($1_screen_t) + + libs_use_ld_so($1_screen_t) + libs_use_shared_libs($1_screen_t) + + logging_send_syslog_msg($1_screen_t) + + miscfiles_read_localization($1_screen_t) + + seutil_read_config($1_screen_t) + + sysnet_read_config($1_screen_t) + + userdom_use_user_terminals($1,$1_screen_t) + userdom_create_user_pty($1,$1_screen_t) + userdom_user_home_domtrans($1,$1_screen_t,$2) + + tunable_policy(`read_default_t',` + files_list_default($1_screen_t) + files_read_default_files($1_screen_t) + files_read_default_symlinks($1_screen_t) + files_read_default_sockets($1_screen_t) + files_read_default_pipes($1_screen_t) + ') + + tunable_policy(`use_samba_home_dirs',` + fs_cifs_domtrans($1_screen_t,$2) + fs_read_cifs_symlinks($1_screen_t) + fs_list_cifs($1_screen_t) + ') + + tunable_policy(`use_nfs_home_dirs',` + fs_nfs_domtrans($1_screen_t,$2) + fs_list_nfs($1_screen_t) + fs_read_nfs_symlinks($1_screen_t) + ') + + optional_policy(`nis',` + nis_use_ypbind($1_screen_t) + ') + + optional_policy(`nscd',` + nscd_use_socket($1_screen_t) + ') + + ifdef(`TODO',` + # Inherit and use descriptors from gnome-pty-helper. + optional_policy(`gnome-pty-helper.te',` + allow $1_screen_t $1_gph_t:fd use; + ') + ') dnl TODO +') diff --git a/refpolicy/policy/modules/apps/screen.te b/refpolicy/policy/modules/apps/screen.te new file mode 100644 index 0000000..0cfaf56 --- /dev/null +++ b/refpolicy/policy/modules/apps/screen.te @@ -0,0 +1,13 @@ + +policy_module(screen,1.0.0) + +######################################## +# +# Declarations +# + +type screen_dir_t; +files_pid_file(screen_dir_t) + +type screen_exec_t; +files_type(screen_exec_t) diff --git a/refpolicy/policy/modules/kernel/filesystem.if b/refpolicy/policy/modules/kernel/filesystem.if index 6648e9f..58b8e0a 100644 --- a/refpolicy/policy/modules/kernel/filesystem.if +++ b/refpolicy/policy/modules/kernel/filesystem.if @@ -1098,6 +1098,22 @@ interface(`fs_search_nfs',` ######################################## ## +## List NFS filesystem. +## +## +## Domain allowed access. +## +# +interface(`fs_list_nfs',` + gen_require(` + type nfs_t; + ') + + allow $1 nfs_t:dir r_dir_perms; +') + +######################################## +## ## Do not audit attempts to list the contents ## of directories on a NFS filesystem. ## diff --git a/refpolicy/policy/modules/services/ssh.fc b/refpolicy/policy/modules/services/ssh.fc index 699badc..e83a852 100644 --- a/refpolicy/policy/modules/services/ssh.fc +++ b/refpolicy/policy/modules/services/ssh.fc @@ -10,7 +10,7 @@ /usr/sbin/sshd -- gen_context(system_u:object_r:sshd_exec_t,s0) -/var/run/sshd\.init\.pid -- gen_context(system_u:object_r:sshd_var_run_t,s0) +/var/run/sshd\.init\.pid -- gen_context(system_u:object_r:sshd_var_run_t,s0) ifdef(`targeted_policy', `', ` /usr/bin/ssh-agent -- gen_context(system_u:object_r:ssh_agent_exec_t,s0) diff --git a/refpolicy/policy/modules/system/authlogin.if b/refpolicy/policy/modules/system/authlogin.if index 310aaee..96307b3 100644 --- a/refpolicy/policy/modules/system/authlogin.if +++ b/refpolicy/policy/modules/system/authlogin.if @@ -903,6 +903,22 @@ interface(`auth_run_utempter',` ') ####################################### +## +## Do not audit attemps to execute utempter executable. +## +## +## Domain to not audit. +## +# +interface(`auth_dontaudit_exec_utempter',` + gen_require(` + type utempter_exec_t; + ') + + dontaudit $1 utempter_exec_t:file { execute execute_no_trans }; +') + +####################################### # # auth_read_login_records(domain) # diff --git a/refpolicy/policy/modules/system/userdomain.if b/refpolicy/policy/modules/system/userdomain.if index 26e971d..108cd43 100644 --- a/refpolicy/policy/modules/system/userdomain.if +++ b/refpolicy/policy/modules/system/userdomain.if @@ -1022,6 +1022,37 @@ template(`userdom_home_file',` ######################################## ## +## Create a user pty. +## +## +##

+## Create a user pty. +##

+##

+## This is a templated interface, and should only +## be called from a per-userdomain template. +##

+##
+## +## The prefix of the user domain (e.g., user +## is the prefix for user_t). +## +## +## Domain allowed access. +## +# +template(`userdom_create_user_pty',` + ifdef(`strict_policy',` + gen_require(` + type $1_devpts_t; + ') + + term_create_pty($2,$1_devpts_t) + ') +') + +######################################## +## ## Search user home directories. ## ## @@ -1052,6 +1083,49 @@ template(`userdom_search_user_home',` ######################################## ## +## Do a domain transition to the specified +## domain when executing a program in the +## user home directory. +## +## +##

+## Do a domain transition to the specified +## domain when executing a program in the +## user home directory. +##

+##

+## No interprocess communication (signals, pipes, +## etc.) is provided by this interface since +## the domains are not owned by this module. +##

+##

+## This is a templated interface, and should only +## be called from a per-userdomain template. +##

+##
+## +## The prefix of the user domain (e.g., user +## is the prefix for user_t). +## +## +## Domain allowed access. +## +## +## Domain to transition to. +## +# +template(`userdom_user_home_domtrans',` + gen_require(` + type $1_home_dir_t, $1_home_t; + ') + + files_search_home($2) + allow $2 $1_home_dir_t:dir search_dir_perms; + domain_auto_trans($2,$1_home_t,$3) +') + +######################################## +## ## Create, read, write, and delete symbolic links ## in a user home subdirectory. ##