#DESC Sendmail - Mail server

#

# Authors:  Stephen Smalley <sds@epoch.ncsc.mil> and Timothy Fraser  

# X-Debian-Packages: sendmail sendmail-wide

# Depends: mta.te

#

#################################

#

# Rules for the sendmail_t domain.

#

# sendmail_t is the domain for the sendmail 

# daemon started by the init rc scripts.

#

daemon_base_domain(sendmail_launch)

allow sendmail_launch_t { etc_t proc_t etc_runtime_t self }:file { getattr read };

allow sendmail_launch_t { bin_t sbin_t etc_t }:lnk_file { getattr read };

allow sendmail_launch_t { bin_t sbin_t }:dir search;

can_exec(sendmail_launch_t, { etc_t bin_t sbin_t shell_exec_t })

access_terminal(sendmail_launch_t, sysadm)

ifdef(`consoletype.te', `

domain_auto_trans(sendmail_launch_t, consoletype_exec_t, consoletype_t)

')

read_locale(sendmail_launch_t)

r_dir_file(sendmail_launch_t, etc_mail_t)

allow sendmail_launch_t self:fifo_file rw_file_perms;

allow sendmail_launch_t self:capability { chown kill sys_nice };

allow sendmail_launch_t self:unix_stream_socket create_stream_socket_perms;

can_ps(sendmail_launch_t, sendmail_t)

dontaudit sendmail_launch_t domain:dir search;

allow sendmail_launch_t sendmail_t:process signal;

ifdef(`distro_redhat', `

lock_domain(sendmail_launch)

')

dontaudit sendmail_launch_t mnt_t:dir search;

allow sendmail_launch_t devpts_t:dir search;

file_type_auto_trans(sendmail_launch_t, var_run_t, sendmail_var_run_t, file)

daemon_core_rules(sendmail, `, nscd_client_domain, mta_delivery_agent, mail_server_domain, mail_server_sender')

# stuff from daemon_domain and daemon_base_domain because we can not have an

# automatic transition from initrc_t

rhgb_domain(sendmail_t)

read_sysctl(sendmail_t)

domain_auto_trans(sendmail_launch_t, sendmail_exec_t, sendmail_t)

allow sendmail_t privfd:fd use;

allow { sendmail_t sendmail_launch_t } var_t:dir { getattr search };

var_run_domain(sendmail)

allow sendmail_t { ttyfile devtty_t }:chr_file rw_file_perms;

dontaudit { sendmail_t sendmail_launch_t } sysadm_home_dir_t:dir search;

read_locale(sendmail_t)

allow sendmail_t fs_t:filesystem getattr;

tmp_domain(sendmail)

logdir_domain(sendmail)

# Use capabilities

allow sendmail_t self:capability { setuid setgid net_bind_service sys_nice chown sys_tty_config };

# Use the network.

can_network(sendmail_t)

allow sendmail_t port_type:tcp_socket name_connect;

can_ypbind(sendmail_t)

allow sendmail_t self:unix_stream_socket create_stream_socket_perms;

allow sendmail_t self:unix_dgram_socket create_socket_perms;

allow sendmail_t self:fifo_file rw_file_perms;

# Bind to the SMTP port.

allow sendmail_t smtp_port_t:tcp_socket name_bind;

allow sendmail_t etc_t:file { getattr read };

# Write to /etc/aliases and /etc/mail.

allow sendmail_t etc_aliases_t:file { setattr rw_file_perms };

allow sendmail_t etc_mail_t:dir rw_dir_perms;

allow sendmail_t etc_mail_t:file create_file_perms;

# Write to /var/spool/mail and /var/spool/mqueue.

allow sendmail_t var_spool_t:dir { getattr search };

allow sendmail_t mail_spool_t:dir rw_dir_perms;

allow sendmail_t mail_spool_t:file create_file_perms;

allow sendmail_t mqueue_spool_t:dir rw_dir_perms;

allow sendmail_t mqueue_spool_t:file create_file_perms;

allow sendmail_t urandom_device_t:chr_file { getattr read };

# Read /usr/lib/sasl2/.*

allow sendmail_t lib_t:file { getattr read };

# When sendmail runs as user_mail_domain, it needs some extra permissions

# to update /etc/mail/statistics.

allow user_mail_domain etc_mail_t:file rw_file_perms;

# Silently deny attempts to access /root.

dontaudit system_mail_t { staff_home_dir_t sysadm_home_dir_t}:dir { getattr search };

# Run procmail in its own domain, if defined.

ifdef(`procmail.te',`

domain_auto_trans(sendmail_t, procmail_exec_t, procmail_t)

domain_auto_trans(system_mail_t, procmail_exec_t, procmail_t)

allow sendmail_t bin_t:dir { getattr search };

')

read_sysctl(sendmail_t)

read_sysctl(system_mail_t)

allow system_mail_t etc_mail_t:dir { getattr search };

allow system_mail_t etc_runtime_t:file { getattr read };

allow system_mail_t proc_t:dir search;

allow system_mail_t proc_t:file { getattr read };

allow system_mail_t proc_t:lnk_file read;

dontaudit system_mail_t proc_net_t:dir search;

allow system_mail_t fs_t:filesystem getattr;

allow system_mail_t self:dir { getattr search };

allow system_mail_t var_t:dir getattr;

allow system_mail_t var_spool_t:dir getattr;

dontaudit system_mail_t userpty_type:chr_file { getattr read write };

# sendmail -q 

allow system_mail_t mqueue_spool_t:dir rw_dir_perms;

allow system_mail_t mqueue_spool_t:file create_file_perms;

ifdef(`crond.te', `

dontaudit system_mail_t system_crond_tmp_t:file append;

')

dontaudit sendmail_t admin_tty_type:chr_file rw_file_perms;

# sendmail wants to read /var/run/utmp if the controlling tty is /dev/console

allow sendmail_t initrc_var_run_t:file { getattr read };

dontaudit sendmail_t initrc_var_run_t:file { lock write };