275 lines
8.4 KiB
Plaintext
275 lines
8.4 KiB
Plaintext
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#
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# Macros for X server domains.
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#
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#
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# Authors: Stephen Smalley <sds@epoch.ncsc.mil> and Timothy Fraser
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#
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#################################
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#
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# xserver_domain(domain_prefix)
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#
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# Define a derived domain for the X server when executed
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# by a user domain (e.g. via startx). See the xdm_t domain
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# in domains/program/xdm.te if using an X Display Manager.
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#
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# The type declarations for the executable type for this program
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# and the log type are provided separately in domains/program/xserver.te.
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#
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# FIXME! The X server requires far too many privileges.
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#
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undefine(`xserver_domain')
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ifdef(`xserver.te', `
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define(`xserver_domain',`
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# Derived domain based on the calling user domain and the program.
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ifdef(`distro_redhat', `
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type $1_xserver_t, domain, privlog, privmem, privmodule, nscd_client_domain;
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allow $1_xserver_t sysctl_modprobe_t:file { getattr read };
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ifdef(`rpm.te', `
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allow $1_xserver_t rpm_t:shm { unix_read unix_write read write associate getattr };
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allow $1_xserver_t rpm_tmpfs_t:file { read write };
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allow $1_xserver_t rpm_t:fd use;
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')
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', `
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type $1_xserver_t, domain, privlog, privmem, nscd_client_domain;
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')
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# for SSP
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allow $1_xserver_t urandom_device_t:chr_file { getattr read ioctl };
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# Transition from the user domain to this domain.
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ifelse($1, xdm, `
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ifdef(`xdm.te', `
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domain_auto_trans(xdm_t, xserver_exec_t, xdm_xserver_t)
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')
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', `
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domain_auto_trans($1_t, xserver_exec_t, $1_xserver_t)
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')dnl end ifelse xdm
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can_exec($1_xserver_t, xserver_exec_t)
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uses_shlib($1_xserver_t)
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allow $1_xserver_t texrel_shlib_t:file execmod;
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can_network($1_xserver_t)
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allow $1_xserver_t port_type:tcp_socket name_connect;
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can_ypbind($1_xserver_t)
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allow $1_xserver_t xserver_port_t:tcp_socket name_bind;
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# for access within the domain
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general_domain_access($1_xserver_t)
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allow $1_xserver_t self:process execmem;
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# Until the X module loader is fixed.
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allow $1_xserver_t self:process execheap;
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allow $1_xserver_t etc_runtime_t:file { getattr read };
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ifelse($1, xdm, `
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# The system role is authorised for the xdm and initrc domains
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role system_r types xdm_xserver_t;
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allow xdm_xserver_t init_t:fd use;
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dontaudit xdm_xserver_t home_dir_type:dir { read search };
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# Read all global and per user fonts
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read_fonts($1_xserver_t, sysadm)
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read_fonts($1_xserver_t, staff)
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read_fonts($1_xserver_t, user)
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', `
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# The user role is authorized for this domain.
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role $1_r types $1_xserver_t;
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allow $1_xserver_t getty_t:fd use;
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allow $1_xserver_t local_login_t:fd use;
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allow $1_xserver_t $1_tty_device_t:chr_file { setattr rw_file_perms };
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allow $1_xserver_t $1_tmpfs_t:file rw_file_perms;
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allow $1_t $1_xserver_tmpfs_t:file rw_file_perms;
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can_unix_connect($1_t, $1_xserver_t)
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# Read fonts
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read_fonts($1_xserver_t, $1)
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# Access the home directory.
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allow $1_xserver_t home_root_t:dir search;
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allow $1_xserver_t $1_home_dir_t:dir { getattr search };
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ifdef(`xauth.te', `
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domain_auto_trans($1_xserver_t, xauth_exec_t, $1_xauth_t)
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allow $1_xserver_t $1_xauth_home_t:file { getattr read };
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', `
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allow $1_xserver_t $1_home_t:file { getattr read };
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')dnl end ifdef xauth
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ifdef(`userhelper.te', `
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allow $1_xserver_t userhelper_conf_t:dir search;
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')dnl end ifdef userhelper
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')dnl end ifelse xdm
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allow $1_xserver_t self:process setsched;
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allow $1_xserver_t fs_t:filesystem getattr;
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# Xorg wants to check if kernel is tainted
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read_sysctl($1_xserver_t)
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# Use capabilities.
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# allow setuid/setgid for the wrapper program to change UID
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# sys_rawio is for iopl access - should not be needed for frame-buffer
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# sys_admin, locking shared mem? chowning IPC message queues or semaphores?
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# admin of APM bios?
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# sys_nice is so that the X server can set a negative nice value
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allow $1_xserver_t self:capability { dac_override fsetid setgid setuid ipc_owner sys_rawio sys_admin sys_nice sys_tty_config mknod net_bind_service };
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allow $1_xserver_t nfs_t:dir { getattr search };
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# memory_device_t access is needed if not using the frame buffer
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#dontaudit $1_xserver_t memory_device_t:chr_file read;
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allow $1_xserver_t memory_device_t:chr_file { rw_file_perms execute };
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# net_bind_service is needed if you want your X server to allow TCP connections
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# from other hosts, EG an XDM serving a network of X terms
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# if you want good security you do not want this
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# not sure why some people want chown, fsetid, and sys_tty_config.
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#allow $1_xserver_t self:capability { net_bind_service chown fsetid sys_tty_config };
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dontaudit $1_xserver_t self:capability chown;
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# for nscd
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dontaudit $1_xserver_t var_run_t:dir search;
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allow $1_xserver_t mtrr_device_t:file rw_file_perms;
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allow $1_xserver_t apm_bios_t:chr_file rw_file_perms;
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allow $1_xserver_t framebuf_device_t:chr_file rw_file_perms;
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allow $1_xserver_t device_t:lnk_file { getattr read };
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allow $1_xserver_t devtty_t:chr_file rw_file_perms;
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allow $1_xserver_t zero_device_t:chr_file { read write execute };
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# Type for temporary files.
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tmp_domain($1_xserver, `', `{ dir file sock_file }')
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file_type_auto_trans($1_xserver_t, xdm_xserver_tmp_t, $1_xserver_tmp_t, sock_file)
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ifelse($1, xdm, `
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ifdef(`xdm.te', `
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allow xdm_t xdm_xserver_tmp_t:dir r_dir_perms;
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allow xdm_t xdm_xserver_t:unix_stream_socket connectto;
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allow xdm_t $1_xserver_t:process signal;
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can_unix_connect(xdm_t, xdm_xserver_t)
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allow xdm_t xdm_xserver_tmp_t:sock_file rw_file_perms;
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allow xdm_t xdm_xserver_tmp_t:dir r_dir_perms;
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allow xdm_xserver_t xdm_t:process signal;
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allow xdm_xserver_t xdm_t:shm rw_shm_perms;
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allow xdm_t xdm_xserver_t:shm rw_shm_perms;
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dontaudit xdm_xserver_t sysadm_t:shm { unix_read unix_write };
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')
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', `
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allow $1_t xdm_xserver_tmp_t:dir r_dir_perms;
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allow $1_t xdm_xserver_t:unix_stream_socket connectto;
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allow $1_t $1_xserver_t:process signal;
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# Allow the user domain to connect to the X server.
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can_unix_connect($1_t, $1_xserver_t)
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allow $1_t $1_xserver_tmp_t:sock_file rw_file_perms;
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allow $1_t $1_xserver_tmp_t:dir r_dir_perms;
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ifdef(`xdm.te', `
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allow $1_t xdm_tmp_t:sock_file unlink;
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allow $1_xserver_t xdm_var_run_t:dir search;
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')
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# Signal the user domain.
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allow $1_xserver_t $1_t:process signal;
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# Communicate via System V shared memory.
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allow $1_xserver_t $1_t:shm rw_shm_perms;
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allow $1_t $1_xserver_t:shm rw_shm_perms;
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allow $1_xserver_t initrc_t:shm rw_shm_perms;
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')dnl end ifelse xdm
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# Create files in /var/log with the xserver_log_t type.
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allow $1_xserver_t var_t:dir search;
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file_type_auto_trans($1_xserver_t, var_log_t, xserver_log_t, file)
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allow $1_xserver_t xserver_log_t:dir r_dir_perms;
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# Access AGP device.
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allow $1_xserver_t agp_device_t:chr_file rw_file_perms;
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# for other device nodes such as the NVidia binary-only driver
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allow $1_xserver_t xserver_misc_device_t:chr_file rw_file_perms;
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# Access /proc/mtrr
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allow $1_xserver_t proc_t:file rw_file_perms;
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allow $1_xserver_t proc_t:lnk_file { getattr read };
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# Access /proc/sys/dev
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allow $1_xserver_t sysctl_dev_t:dir search;
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allow $1_xserver_t sysctl_dev_t:file { getattr read };
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# Access /proc/bus/pci
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allow $1_xserver_t proc_t:dir r_dir_perms;
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# Create and access /dev/dri devices.
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allow $1_xserver_t device_t:dir { create setattr };
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file_type_auto_trans($1_xserver_t, device_t, dri_device_t, chr_file)
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# brought on by rhgb
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allow $1_xserver_t mnt_t:dir search;
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allow $1_xserver_t tty_device_t:chr_file { setattr rw_file_perms };
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# Run helper programs in $1_xserver_t.
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allow $1_xserver_t { bin_t sbin_t }:dir search;
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allow $1_xserver_t etc_t:{ file lnk_file } { getattr read };
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allow $1_xserver_t bin_t:lnk_file read;
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can_exec($1_xserver_t, { bin_t shell_exec_t })
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# Connect to xfs.
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ifdef(`xfs.te', `
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can_unix_connect($1_xserver_t, xfs_t)
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allow $1_xserver_t xfs_tmp_t:dir r_dir_perms;
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allow $1_xserver_t xfs_tmp_t:sock_file rw_file_perms;
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# Bind to the X server socket in /tmp.
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allow $1_xserver_t $1_xserver_tmp_t:unix_stream_socket name_bind;
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')
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read_locale($1_xserver_t)
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# Type for tmpfs/shm files.
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tmpfs_domain($1_xserver)
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ifelse($1, xdm, `
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ifdef(`xdm.te', `
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allow xdm_xserver_t xdm_t:shm rw_shm_perms;
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allow xdm_xserver_t xdm_tmpfs_t:file rw_file_perms;
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')
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', `
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allow $1_xserver_t $1_t:shm rw_shm_perms;
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rw_dir_file($1_xserver_t, $1_tmpfs_t)
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')dnl end ifelse xdm
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r_dir_file($1_xserver_t,sysfs_t)
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# Use the mouse.
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allow $1_xserver_t mouse_device_t:chr_file rw_file_perms;
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# Allow xserver to read events - the synaptics touchpad
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# driver reads raw events
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allow $1_xserver_t event_device_t:chr_file rw_file_perms;
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ifdef(`pamconsole.te', `
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allow $1_xserver_t pam_var_console_t:dir search;
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')
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dontaudit $1_xserver_t selinux_config_t:dir search;
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allow $1_xserver_t var_lib_t:dir search;
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rw_dir_create_file($1_xserver_t, xkb_var_lib_t)
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')dnl end macro definition
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', `
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define(`xserver_domain',`')
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')
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