235 lines
6.7 KiB
Plaintext
235 lines
6.7 KiB
Plaintext
#DESC Login - Local/remote login utilities
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#
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# Authors: Stephen Smalley <sds@epoch.ncsc.mil> and Timothy Fraser
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# Macroised by Russell Coker <russell@coker.com.au>
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# X-Debian-Packages: login
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#
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#################################
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#
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# Rules for the local_login_t domain
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# and the remote_login_t domain.
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#
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# $1 is the name of the domain (local or remote)
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define(`login_domain', `
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type $1_login_t, domain, privuser, privrole, privlog, auth_chkpwd, privowner, privfd, nscd_client_domain, mlsfileread, mlsfilewrite, mlsprocsetsl, mlsfileupgrade, mlsfiledowngrade;
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role system_r types $1_login_t;
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dontaudit $1_login_t shadow_t:file { getattr read };
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general_domain_access($1_login_t);
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# Read system information files in /proc.
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r_dir_file($1_login_t, proc_t)
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base_file_read_access($1_login_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_login_t readable_t:dir r_dir_perms;
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allow $1_login_t readable_t:notdevfile_class_set r_file_perms;
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# Read /var, /var/spool
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allow $1_login_t { var_t var_spool_t }:dir search;
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# for when /var/mail is a sym-link
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allow $1_login_t var_t:lnk_file read;
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# Read /etc.
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r_dir_file($1_login_t, etc_t)
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allow $1_login_t etc_runtime_t:{ file lnk_file } r_file_perms;
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read_locale($1_login_t)
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# for SSP/ProPolice
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allow $1_login_t urandom_device_t:chr_file { getattr read };
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# Read executable types.
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allow $1_login_t exec_type:{ file lnk_file } r_file_perms;
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# Read /dev directories and any symbolic links.
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allow $1_login_t device_t:dir r_dir_perms;
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allow $1_login_t device_t:lnk_file r_file_perms;
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uses_shlib($1_login_t);
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tmp_domain($1_login)
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ifdef(`pam.te', `
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can_exec($1_login_t, pam_exec_t)
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')
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ifdef(`pamconsole.te', `
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rw_dir_create_file($1_login_t, pam_var_console_t)
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domain_auto_trans($1_login_t, pam_console_exec_t, pam_console_t)
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')
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ifdef(`alsa.te', `
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domain_auto_trans($1_login_t, alsa_exec_t, alsa_t)
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')
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# Use capabilities
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allow $1_login_t self:capability { dac_override chown fowner fsetid kill setgid setuid net_bind_service sys_nice sys_resource sys_tty_config };
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allow $1_login_t self:process setrlimit;
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dontaudit $1_login_t sysfs_t:dir search;
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# Set exec context.
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can_setexec($1_login_t)
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allow $1_login_t autofs_t:dir { search read getattr };
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allow $1_login_t mnt_t:dir r_dir_perms;
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if (use_nfs_home_dirs) {
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r_dir_file($1_login_t, nfs_t)
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}
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if (use_samba_home_dirs) {
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r_dir_file($1_login_t, cifs_t)
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}
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# Login can polyinstantiate
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polyinstantiater($1_login_t)
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# FIXME: what is this for?
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ifdef(`xdm.te', `
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allow xdm_t $1_login_t:process signull;
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')
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ifdef(`crack.te', `
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allow $1_login_t crack_db_t:file r_file_perms;
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')
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# Permit login to search the user home directories.
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allow $1_login_t home_root_t:dir search;
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allow $1_login_t home_dir_type:dir search;
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# Write to /var/run/utmp.
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allow $1_login_t var_run_t:dir search;
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allow $1_login_t initrc_var_run_t:file rw_file_perms;
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# Write to /var/log/wtmp.
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allow $1_login_t var_log_t:dir search;
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allow $1_login_t wtmp_t:file rw_file_perms;
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# Write to /var/log/lastlog.
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allow $1_login_t lastlog_t:file rw_file_perms;
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# Write to /var/log/btmp
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allow $1_login_t faillog_t:file { lock append read write };
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# Search for mail spool file.
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allow $1_login_t mail_spool_t:dir r_dir_perms;
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allow $1_login_t mail_spool_t:file getattr;
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allow $1_login_t mail_spool_t:lnk_file read;
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# Get security policy decisions.
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can_getsecurity($1_login_t)
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# allow read access to default_contexts in /etc/security
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allow $1_login_t default_context_t:file r_file_perms;
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allow $1_login_t default_context_t:dir search;
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r_dir_file($1_login_t, selinux_config_t)
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allow $1_login_t mouse_device_t:chr_file { getattr setattr };
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ifdef(`targeted_policy',`
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unconfined_domain($1_login_t)
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domain_auto_trans($1_login_t, shell_exec_t, unconfined_t)
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')
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')dnl end login_domain macro
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#################################
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#
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# Rules for the local_login_t domain.
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#
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# local_login_t is the domain of a login process
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# spawned by getty.
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#
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# remote_login_t is the domain of a login process
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# spawned by rlogind.
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#
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# login_exec_t is the type of the login program
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#
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type login_exec_t, file_type, sysadmfile, exec_type;
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login_domain(local)
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# But also permit other user domains to be entered by login.
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login_spawn_domain(local_login, userdomain)
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# Do not audit denied attempts to access devices.
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dontaudit local_login_t fixed_disk_device_t:blk_file { getattr setattr };
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dontaudit local_login_t removable_device_t:blk_file { getattr setattr };
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dontaudit local_login_t device_t:{ chr_file blk_file lnk_file } { getattr setattr };
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dontaudit local_login_t misc_device_t:{ chr_file blk_file } { getattr setattr };
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dontaudit local_login_t framebuf_device_t:chr_file { getattr setattr read };
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dontaudit local_login_t apm_bios_t:chr_file { getattr setattr };
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dontaudit local_login_t v4l_device_t:chr_file { getattr setattr read };
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dontaudit local_login_t removable_device_t:chr_file { getattr setattr };
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dontaudit local_login_t scanner_device_t:chr_file { getattr setattr };
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# Do not audit denied attempts to access /mnt.
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dontaudit local_login_t mnt_t:dir r_dir_perms;
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# Create lock file.
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lock_domain(local_login)
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# Read and write ttys.
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allow local_login_t tty_device_t:chr_file { setattr rw_file_perms };
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allow local_login_t ttyfile:chr_file { setattr rw_file_perms };
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# Relabel ttys.
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allow local_login_t tty_device_t:chr_file { getattr relabelfrom relabelto };
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allow local_login_t ttyfile:chr_file { getattr relabelfrom relabelto };
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ifdef(`gpm.te',
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`allow local_login_t gpmctl_t:sock_file { getattr setattr };')
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# Allow setting of attributes on sound devices.
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allow local_login_t sound_device_t:chr_file { getattr setattr };
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# Allow setting of attributes on power management devices.
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allow local_login_t power_device_t:chr_file { getattr setattr };
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dontaudit local_login_t init_t:fd use;
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#################################
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#
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# Rules for the remote_login_t domain.
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#
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login_domain(remote)
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# Only permit unprivileged user domains to be entered via rlogin,
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# since very weak authentication is used.
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login_spawn_domain(remote_login, unpriv_userdomain)
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allow remote_login_t userpty_type:chr_file { setattr write };
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# Use the pty created by rlogind.
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ifdef(`rlogind.te', `
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can_access_pty(remote_login_t, rlogind)
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# Relabel ptys created by rlogind.
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allow remote_login_t rlogind_devpts_t:chr_file { setattr relabelfrom relabelto };
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')
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# Use the pty created by telnetd.
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ifdef(`telnetd.te', `
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can_access_pty(remote_login_t, telnetd)
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# Relabel ptys created by telnetd.
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allow remote_login_t telnetd_devpts_t:chr_file { setattr relabelfrom relabelto };
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')
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allow remote_login_t ptyfile:chr_file { getattr relabelfrom relabelto ioctl };
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allow remote_login_t fs_t:filesystem { getattr };
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# Allow remote login to resolve host names (passed in via the -h switch)
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can_resolve(remote_login_t)
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ifdef(`use_mcs', `
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ifdef(`getty.te', `
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range_transition getty_t login_exec_t s0 - s0:c0.c127;
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')
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')
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