301 lines
7.3 KiB
Plaintext
301 lines
7.3 KiB
Plaintext
## <summary>Run shells with substitute user and group</summary>
|
|
|
|
#######################################
|
|
## <summary>
|
|
## Restricted su domain template.
|
|
## </summary>
|
|
## <desc>
|
|
## <p>
|
|
## This template creates a derived domain which is allowed
|
|
## to change the linux user id, to run shells as a different
|
|
## user.
|
|
## </p>
|
|
## </desc>
|
|
## <param name="userdomain_prefix">
|
|
## <summary>
|
|
## The prefix of the user domain (e.g., user
|
|
## is the prefix for user_t).
|
|
## </summary>
|
|
## </param>
|
|
## <param name="user_domain">
|
|
## <summary>
|
|
## The type of the user domain.
|
|
## </summary>
|
|
## </param>
|
|
## <param name="user_role">
|
|
## <summary>
|
|
## The role associated with the user domain.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
template(`su_restricted_domain_template', `
|
|
gen_require(`
|
|
type su_exec_t;
|
|
')
|
|
|
|
type $1_su_t;
|
|
domain_entry_file($1_su_t, su_exec_t)
|
|
domain_type($1_su_t)
|
|
domain_interactive_fd($1_su_t)
|
|
role $3 types $1_su_t;
|
|
|
|
allow $2 $1_su_t:process signal;
|
|
|
|
allow $1_su_t self:capability { audit_control audit_write setuid setgid net_bind_service chown dac_override fowner sys_nice sys_resource };
|
|
dontaudit $1_su_t self:capability sys_tty_config;
|
|
allow $1_su_t self:key { search write };
|
|
allow $1_su_t self:process { setexec setsched setrlimit };
|
|
allow $1_su_t self:fifo_file rw_fifo_file_perms;
|
|
allow $1_su_t self:netlink_audit_socket { nlmsg_relay create_netlink_socket_perms };
|
|
allow $1_su_t self:unix_stream_socket create_stream_socket_perms;
|
|
|
|
# Transition from the user domain to this domain.
|
|
domtrans_pattern($2, su_exec_t, $1_su_t)
|
|
|
|
# By default, revert to the calling domain when a shell is executed.
|
|
corecmd_shell_domtrans($1_su_t,$2)
|
|
allow $2 $1_su_t:fd use;
|
|
allow $2 $1_su_t:fifo_file rw_file_perms;
|
|
allow $2 $1_su_t:process sigchld;
|
|
|
|
kernel_read_system_state($1_su_t)
|
|
kernel_read_kernel_sysctls($1_su_t)
|
|
kernel_search_key($1_su_t)
|
|
kernel_link_key($1_su_t)
|
|
|
|
# for SSP
|
|
dev_read_urand($1_su_t)
|
|
|
|
files_read_etc_files($1_su_t)
|
|
files_read_etc_runtime_files($1_su_t)
|
|
files_search_var_lib($1_su_t)
|
|
files_dontaudit_getattr_tmp_dirs($1_su_t)
|
|
|
|
# for the rootok check
|
|
selinux_compute_access_vector($1_su_t)
|
|
|
|
auth_domtrans_chk_passwd($1_su_t)
|
|
auth_dontaudit_read_shadow($1_su_t)
|
|
auth_use_nsswitch($1_su_t)
|
|
auth_rw_faillog($1_su_t)
|
|
|
|
domain_use_interactive_fds($1_su_t)
|
|
|
|
init_dontaudit_use_fds($1_su_t)
|
|
init_dontaudit_use_script_ptys($1_su_t)
|
|
# Write to utmp.
|
|
init_rw_utmp($1_su_t)
|
|
|
|
logging_send_syslog_msg($1_su_t)
|
|
|
|
miscfiles_read_localization($1_su_t)
|
|
|
|
ifdef(`distro_rhel4',`
|
|
domain_role_change_exemption($1_su_t)
|
|
domain_subj_id_change_exemption($1_su_t)
|
|
domain_obj_id_change_exemption($1_su_t)
|
|
|
|
selinux_get_fs_mount($1_su_t)
|
|
selinux_validate_context($1_su_t)
|
|
selinux_compute_access_vector($1_su_t)
|
|
selinux_compute_create_context($1_su_t)
|
|
selinux_compute_relabel_context($1_su_t)
|
|
selinux_compute_user_contexts($1_su_t)
|
|
|
|
seutil_read_config($1_su_t)
|
|
seutil_read_default_contexts($1_su_t)
|
|
|
|
# Only allow transitions to unprivileged user domains.
|
|
userdom_spec_domtrans_unpriv_users($1_su_t)
|
|
')
|
|
|
|
optional_policy(`
|
|
cron_read_pipes($1_su_t)
|
|
')
|
|
|
|
optional_policy(`
|
|
kerberos_use($1_su_t)
|
|
')
|
|
|
|
ifdef(`TODO',`
|
|
# Caused by su - init scripts
|
|
dontaudit $1_su_t initrc_devpts_t:chr_file { getattr ioctl };
|
|
') dnl end TODO
|
|
')
|
|
|
|
#######################################
|
|
## <summary>
|
|
## The role template for the su module.
|
|
## </summary>
|
|
## <param name="role_prefix">
|
|
## <summary>
|
|
## The prefix of the user role (e.g., user
|
|
## is the prefix for user_r).
|
|
## </summary>
|
|
## </param>
|
|
## <param name="user_role">
|
|
## <summary>
|
|
## The role associated with the user domain.
|
|
## </summary>
|
|
## </param>
|
|
## <param name="user_domain">
|
|
## <summary>
|
|
## The type of the user domain.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
template(`su_role_template',`
|
|
gen_require(`
|
|
attribute su_domain_type;
|
|
type su_exec_t;
|
|
bool secure_mode;
|
|
')
|
|
|
|
type $1_su_t, su_domain_type;
|
|
domain_entry_file($1_su_t,su_exec_t)
|
|
domain_type($1_su_t)
|
|
domain_interactive_fd($1_su_t)
|
|
ubac_constrained($1_su_t)
|
|
role $2 types $1_su_t;
|
|
|
|
allow $3 $1_su_t:process signal;
|
|
|
|
allow $1_su_t self:capability { audit_control audit_write setuid setgid net_bind_service chown dac_override fowner sys_nice sys_resource };
|
|
dontaudit $1_su_t self:capability sys_tty_config;
|
|
allow $1_su_t self:process { setexec setsched setrlimit };
|
|
allow $1_su_t self:fifo_file rw_fifo_file_perms;
|
|
allow $1_su_t self:netlink_audit_socket { nlmsg_relay create_netlink_socket_perms };
|
|
allow $1_su_t self:key { search write };
|
|
|
|
# Transition from the user domain to this domain.
|
|
domtrans_pattern($3, su_exec_t, $1_su_t)
|
|
|
|
ps_process_pattern($3, $1_su_t)
|
|
|
|
# By default, revert to the calling domain when a shell is executed.
|
|
corecmd_shell_domtrans($1_su_t, $3)
|
|
allow $3 $1_su_t:fd use;
|
|
allow $3 $1_su_t:fifo_file rw_file_perms;
|
|
allow $3 $1_su_t:process sigchld;
|
|
|
|
kernel_read_system_state($1_su_t)
|
|
kernel_read_kernel_sysctls($1_su_t)
|
|
kernel_search_key($1_su_t)
|
|
kernel_link_key($1_su_t)
|
|
|
|
# for SSP
|
|
dev_read_urand($1_su_t)
|
|
|
|
fs_search_auto_mountpoints($1_su_t)
|
|
|
|
# needed for pam_rootok
|
|
selinux_compute_access_vector($1_su_t)
|
|
|
|
auth_domtrans_chk_passwd($1_su_t)
|
|
auth_dontaudit_read_shadow($1_su_t)
|
|
auth_use_nsswitch($1_su_t)
|
|
auth_rw_faillog($1_su_t)
|
|
|
|
corecmd_search_bin($1_su_t)
|
|
|
|
domain_use_interactive_fds($1_su_t)
|
|
|
|
files_read_etc_files($1_su_t)
|
|
files_read_etc_runtime_files($1_su_t)
|
|
files_search_var_lib($1_su_t)
|
|
files_dontaudit_getattr_tmp_dirs($1_su_t)
|
|
|
|
init_dontaudit_use_fds($1_su_t)
|
|
# Write to utmp.
|
|
init_rw_utmp($1_su_t)
|
|
|
|
mls_file_write_all_levels($1_su_t)
|
|
|
|
logging_send_syslog_msg($1_su_t)
|
|
|
|
miscfiles_read_localization($1_su_t)
|
|
|
|
userdom_use_user_terminals($1_su_t)
|
|
userdom_search_user_home_dirs($1_su_t)
|
|
|
|
ifdef(`distro_rhel4',`
|
|
domain_role_change_exemption($1_su_t)
|
|
domain_subj_id_change_exemption($1_su_t)
|
|
domain_obj_id_change_exemption($1_su_t)
|
|
|
|
selinux_get_fs_mount($1_su_t)
|
|
selinux_validate_context($1_su_t)
|
|
selinux_compute_create_context($1_su_t)
|
|
selinux_compute_relabel_context($1_su_t)
|
|
selinux_compute_user_contexts($1_su_t)
|
|
|
|
# Relabel ttys and ptys.
|
|
term_relabel_all_user_ttys($1_su_t)
|
|
term_relabel_all_user_ptys($1_su_t)
|
|
# Close and re-open ttys and ptys to get the fd into the correct domain.
|
|
term_use_all_user_ttys($1_su_t)
|
|
term_use_all_user_ptys($1_su_t)
|
|
|
|
seutil_read_config($1_su_t)
|
|
seutil_read_default_contexts($1_su_t)
|
|
|
|
if(secure_mode) {
|
|
# Only allow transitions to unprivileged user domains.
|
|
userdom_spec_domtrans_unpriv_users($1_su_t)
|
|
} else {
|
|
# Allow transitions to all user domains
|
|
userdom_spec_domtrans_all_users($1_su_t)
|
|
}
|
|
|
|
optional_policy(`
|
|
unconfined_domtrans($1_su_t)
|
|
unconfined_signal($1_su_t)
|
|
')
|
|
')
|
|
|
|
tunable_policy(`allow_polyinstantiation',`
|
|
fs_mount_xattr_fs($1_su_t)
|
|
fs_unmount_xattr_fs($1_su_t)
|
|
')
|
|
|
|
tunable_policy(`use_nfs_home_dirs',`
|
|
fs_search_nfs($1_su_t)
|
|
')
|
|
|
|
tunable_policy(`use_samba_home_dirs',`
|
|
fs_search_cifs($1_su_t)
|
|
')
|
|
|
|
optional_policy(`
|
|
cron_read_pipes($1_su_t)
|
|
')
|
|
|
|
optional_policy(`
|
|
kerberos_use($1_su_t)
|
|
')
|
|
|
|
# Modify .Xauthority file (via xauth program).
|
|
optional_policy(`
|
|
xserver_user_home_dir_filetrans_user_xauth($1_su_t)
|
|
xserver_domtrans_xauth($1_su_t)
|
|
')
|
|
')
|
|
|
|
#######################################
|
|
## <summary>
|
|
## Execute su in the caller domain.
|
|
## </summary>
|
|
## <param name="domain">
|
|
## <summary>
|
|
## Domain allowed access.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
interface(`su_exec',`
|
|
gen_require(`
|
|
type su_exec_t;
|
|
')
|
|
|
|
can_exec($1, su_exec_t)
|
|
')
|