325 lines
9.0 KiB
Plaintext
325 lines
9.0 KiB
Plaintext
#
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# Macros for all user login domains.
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#
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# role_tty_type_change(starting_role, ending_role)
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#
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# change from role $1_r to $2_r and relabel tty appropriately
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#
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undefine(`role_tty_type_change')
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define(`role_tty_type_change', `
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allow $1_r $2_r;
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type_change $2_t $1_devpts_t:chr_file $2_devpts_t;
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type_change $2_t $1_tty_device_t:chr_file $2_tty_device_t;
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# avoid annoying messages on terminal hangup
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dontaudit $1_t { $2_devpts_t $2_tty_device_t }:chr_file ioctl;
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')
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#
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# reach_sysadm(user)
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#
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# Reach sysadm_t via programs like userhelper/sudo/su
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#
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undefine(`reach_sysadm')
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define(`reach_sysadm', `
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ifdef(`userhelper.te', `userhelper_domain($1)')
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ifdef(`sudo.te', `sudo_domain($1)')
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ifdef(`su.te', `
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su_domain($1)
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# When an ordinary user domain runs su, su may try to
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# update the /root/.Xauthority file, and the user shell may
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# try to update the shell history. This is not allowed, but
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# we dont need to audit it.
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dontaudit $1_su_t { sysadm_home_dir_t staff_home_dir_t }:dir search;
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dontaudit $1_su_t { sysadm_home_t staff_home_t }:dir rw_dir_perms;
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dontaudit $1_su_t { sysadm_home_t staff_home_t }:file create_file_perms;
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') dnl ifdef su.te
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ifdef(`xauth.te', `
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file_type_auto_trans($1_xauth_t, sysadm_home_dir_t, sysadm_xauth_home_t,file)
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ifdef(`userhelper.te', `
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file_type_auto_trans($1_userhelper_t, sysadm_home_dir_t, sysadm_xauth_home_t,file)
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') dnl userhelper.te
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') dnl xauth.te
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') dnl reach_sysadm
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#
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# priv_user(user)
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#
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# Privileged user domain
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#
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undefine(`priv_user')
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define(`priv_user', `
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# Reach sysadm_t
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reach_sysadm($1)
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# Read file_contexts for rpm and get security decisions.
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r_dir_file($1_t, file_context_t)
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can_getsecurity($1_t)
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# Signal and see information about unprivileged user domains.
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allow $1_t unpriv_userdomain:process signal_perms;
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can_ps($1_t, unpriv_userdomain)
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allow $1_t { ttyfile ptyfile tty_device_t }:chr_file getattr;
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# Read /root files if boolean is enabled.
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if (staff_read_sysadm_file) {
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allow $1_t sysadm_home_dir_t:dir { getattr search };
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allow $1_t sysadm_home_t:file { getattr read };
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}
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') dnl priv_user
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#
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# user_domain(domain_prefix)
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#
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# Define derived types and rules for an ordinary user domain.
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#
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# The type declaration and role authorization for the domain must be
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# provided separately. Likewise, domain transitions into this domain
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# must be specified separately.
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#
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# user_domain() is also called by the admin_domain() macro
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undefine(`user_domain')
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define(`user_domain', `
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# Use capabilities
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# Type for home directory.
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type $1_home_dir_t, file_type, sysadmfile, home_dir_type, home_type, user_home_dir_type, polydir;
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type $1_home_t, file_type, sysadmfile, home_type, user_home_type, $1_file_type, polymember;
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# Transition manually for { lnk sock fifo }. The rest is in content macros.
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tmp_domain_notrans($1, `, user_tmpfile, $1_file_type')
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file_type_auto_trans($1_t, tmp_t, $1_tmp_t, { lnk_file sock_file fifo_file })
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allow $1_t $1_tmp_t:{ dir file } { relabelto relabelfrom };
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ifdef(`support_polyinstantiation', `
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type_member $1_t tmp_t:dir $1_tmp_t;
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type_member $1_t $1_home_dir_t:dir $1_home_t;
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')
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base_user_domain($1)
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ifdef(`mls_policy', `', `
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access_removable_media($1_t)
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')
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# do not allow privhome access to sysadm_home_dir_t
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file_type_auto_trans(privhome, $1_home_dir_t, $1_home_t)
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allow $1_t boot_t:dir { getattr search };
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dontaudit $1_t boot_t:lnk_file read;
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dontaudit $1_t boot_t:file read;
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allow $1_t system_map_t:file { getattr read };
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# Instantiate derived domains for a number of programs.
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# These derived domains encode both information about the calling
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# user domain and the program, and allow us to maintain separation
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# between different instances of the program being run by different
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# user domains.
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ifelse($1, sysadm, `',`
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ifdef(`apache.te', `apache_user_domain($1)')
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ifdef(`i18n_input.te', `i18n_input_domain($1)')
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')
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ifdef(`slocate.te', `locate_domain($1)')
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ifdef(`lockdev.te', `lockdev_domain($1)')
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can_kerberos($1_t)
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# allow port_t name binding for UDP because it is not very usable otherwise
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allow $1_t port_t:udp_socket name_bind;
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#
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# Need the following rule to allow users to run vpnc
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#
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ifdef(`xserver.te', `
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allow $1_t xserver_port_t:tcp_socket name_bind;
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')
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# Allow users to run TCP servers (bind to ports and accept connection from
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# the same domain and outside users) disabling this forces FTP passive mode
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# and may change other protocols
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if (user_tcp_server) {
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allow $1_t port_t:tcp_socket name_bind;
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}
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# port access is audited even if dac would not have allowed it, so dontaudit it here
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dontaudit $1_t reserved_port_type:tcp_socket name_bind;
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# Allow system log read
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if (user_dmesg) {
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allow $1_t kernel_t:system syslog_read;
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} else {
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# else do not log it
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dontaudit $1_t kernel_t:system syslog_read;
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}
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# Allow read access to utmp.
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allow $1_t initrc_var_run_t:file { getattr read lock };
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# The library functions always try to open read-write first,
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# then fall back to read-only if it fails.
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# Do not audit write denials to utmp to avoid the noise.
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dontaudit $1_t initrc_var_run_t:file write;
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# do not audit read on disk devices
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dontaudit $1_t { removable_device_t fixed_disk_device_t }:blk_file read;
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ifdef(`xdm.te', `
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allow xdm_t $1_home_t:lnk_file read;
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allow xdm_t $1_home_t:dir search;
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#
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# Changing this to dontaudit should cause the .xsession-errors file to be written to /tmp
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#
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dontaudit xdm_t $1_home_t:file rw_file_perms;
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')dnl end ifdef xdm.te
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ifdef(`ftpd.te', `
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if (ftp_home_dir) {
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file_type_auto_trans(ftpd_t, $1_home_dir_t, $1_home_t)
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}
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')dnl end ifdef ftpd
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')dnl end user_domain macro
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###########################################################################
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#
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# Domains for ordinary users.
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#
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undefine(`limited_user_role')
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define(`limited_user_role', `
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# user_t/$1_t is an unprivileged users domain.
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type $1_t, domain, userdomain, unpriv_userdomain, nscd_client_domain, privfd;
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#Type for tty devices.
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type $1_tty_device_t, sysadmfile, ttyfile, user_tty_type, dev_fs;
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# Type and access for pty devices.
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can_create_pty($1, `, userpty_type, user_tty_type')
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# Access ttys.
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allow $1_t privfd:fd use;
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allow $1_t $1_tty_device_t:chr_file { setattr rw_file_perms };
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# Grant read/search permissions to some of /proc.
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r_dir_file($1_t, proc_t)
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r_dir_file($1_t, proc_net_t)
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base_file_read_access($1_t)
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# Execute from the system shared libraries.
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uses_shlib($1_t)
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# Read /etc.
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r_dir_file($1_t, etc_t)
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allow $1_t etc_runtime_t:file r_file_perms;
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allow $1_t etc_runtime_t:lnk_file { getattr read };
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allow $1_t self:process { fork sigchld setpgid signal_perms };
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# read localization information
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read_locale($1_t)
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read_sysctl($1_t)
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can_exec($1_t, { bin_t sbin_t shell_exec_t ls_exec_t })
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allow $1_t self:dir search;
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allow $1_t self:file { getattr read };
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allow secadm_t self:fifo_file rw_file_perms;
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allow $1_t self:lnk_file read;
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allow $1_t self:unix_stream_socket create_socket_perms;
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allow $1_t urandom_device_t:chr_file { getattr read };
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dontaudit $1_t { var_spool_t var_log_t }:dir search;
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# Read /dev directories and any symbolic links.
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allow $1_t device_t:dir r_dir_perms;
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allow $1_t device_t:lnk_file { getattr read };
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allow $1_t devtty_t:chr_file { read write };
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')
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undefine(`full_user_role')
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define(`full_user_role', `
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limited_user_role($1)
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typeattribute $1_t web_client_domain;
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attribute $1_file_type;
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ifdef(`useradd.te', `
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# Useradd relabels /etc/skel files so needs these privs
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allow useradd_t $1_file_type:dir create_dir_perms;
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allow useradd_t $1_file_type:notdevfile_class_set create_file_perms;
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')
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can_exec($1_t, usr_t)
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# Read directories and files with the readable_t type.
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# This type is a general type for "world"-readable files.
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allow $1_t readable_t:dir r_dir_perms;
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allow $1_t readable_t:notdevfile_class_set r_file_perms;
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# Stat lost+found.
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allow $1_t lost_found_t:dir getattr;
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# Read /var, /var/spool, /var/run.
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r_dir_file($1_t, var_t)
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# what about pipes and sockets under /var/spool?
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r_dir_file($1_t, var_spool_t)
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r_dir_file($1_t, var_run_t)
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allow $1_t var_lib_t:dir r_dir_perms;
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allow $1_t var_lib_t:file { getattr read };
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# for running depmod as part of the kernel packaging process
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allow $1_t modules_conf_t:file { getattr read };
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# Read man directories and files.
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r_dir_file($1_t, man_t)
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# Allow users to rw usb devices
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if (user_rw_usb) {
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rw_dir_create_file($1_t,usbdevfs_t)
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} else {
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r_dir_file($1_t,usbdevfs_t)
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}
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r_dir_file($1_t,sysfs_t)
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# Do not audit write denials to /etc/ld.so.cache.
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dontaudit $1_t ld_so_cache_t:file write;
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# $1_t is also granted permissions specific to user domains.
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user_domain($1)
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dontaudit $1_t sysadm_home_t:file { read append };
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ifdef(`syslogd.te', `
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# Some programs that are left in $1_t will try to connect
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# to syslogd, but we do not want to let them generate log messages.
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# Do not audit.
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dontaudit $1_t devlog_t:sock_file { read write };
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dontaudit $1_t syslogd_t:unix_dgram_socket sendto;
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')
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# Stop warnings about access to /dev/console
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dontaudit $1_t init_t:fd use;
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dontaudit $1_t initrc_t:fd use;
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allow $1_t initrc_t:fifo_file write;
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#
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# Rules used to associate a homedir as a mountpoint
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#
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allow $1_home_t self:filesystem associate;
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allow $1_file_type $1_home_t:filesystem associate;
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')
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undefine(`in_user_role')
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define(`in_user_role', `
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role user_r types $1;
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role staff_r types $1;
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')
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