183 lines
5.2 KiB
Text
183 lines
5.2 KiB
Text
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policy_module(milter, 1.5.0)
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########################################
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#
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# Declarations
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#
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# attributes common to all milters
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attribute milter_domains;
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attribute milter_data_type;
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# support for dkim-milter - domainKeys Identified Mail sender authentication sendmail milter
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milter_template(dkim)
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# type for the private key of dkim-milter
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type dkim_milter_private_key_t;
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files_type(dkim_milter_private_key_t)
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type dkim_milter_tmp_t;
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files_tmp_file(dkim_milter_tmp_t)
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# currently-supported milters are milter-greylist, milter-regex and spamass-milter
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milter_template(greylist)
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milter_template(regex)
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milter_template(spamass)
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# Type for the spamass-milter home directory, under which spamassassin will
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# store system-wide preferences, bayes databases etc. if not configured to
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# use per-user configuration
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type spamass_milter_state_t;
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files_type(spamass_milter_state_t)
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#######################################
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#
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# milter domains local policy
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#
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# Allow communication with MTA over a unix-domain socket
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# Note: usage with TCP sockets requires additional policy
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allow milter_domains self:fifo_file rw_fifo_file_perms;
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allow milter_domains self:process signull;
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# Allow communication with MTA over a TCP socket
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allow milter_domains self:tcp_socket create_stream_socket_perms;
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kernel_dontaudit_read_system_state(milter_domains)
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corenet_tcp_bind_generic_node(milter_domains)
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corenet_tcp_bind_milter_port(milter_domains)
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dev_read_rand(milter_domains)
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dev_read_urand(milter_domains)
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mta_read_config(milter_domains)
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sysnet_read_config(greylist_milter_t)
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#######################################
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#
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# dkim-milter local policy
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#
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allow dkim_milter_t self:capability { kill setgid setuid };
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allow dkim_milter_t self:process { signal setrlimit };
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allow dkim_milter_t self:tcp_socket create_stream_socket_perms;
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allow dkim_milter_t self:unix_stream_socket create_stream_socket_perms;
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read_files_pattern(dkim_milter_t, dkim_milter_private_key_t, dkim_milter_private_key_t)
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manage_files_pattern(dkim_milter_t, dkim_milter_tmp_t, dkim_milter_tmp_t)
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manage_dirs_pattern(dkim_milter_t, dkim_milter_tmp_t, dkim_milter_tmp_t)
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files_tmp_filetrans(dkim_milter_t, dkim_milter_tmp_t, { dir file })
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fs_getattr_xattr_fs(dkim_milter_t)
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kernel_read_kernel_sysctls(dkim_milter_t)
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corecmd_exec_shell(dkim_milter_t)
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corenet_tcp_connect_smtp_port(dkim_milter_t)
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corenet_udp_bind_all_ports(dkim_milter_t)
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auth_use_nsswitch(dkim_milter_t)
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sysnet_dns_name_resolve(dkim_milter_t)
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optional_policy(`
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mta_manage_queue(dkim_milter_t)
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mta_sendmail_exec(dkim_milter_t)
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')
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optional_policy(`
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sendmail_domtrans(dkim_milter_t)
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')
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########################################
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#
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# milter-greylist local policy
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# ensure smtp clients retry mail like real MTAs and not spamware
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# http://hcpnet.free.fr/milter-greylist/
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#
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# It removes any existing socket (not owned by root) whilst running as root,
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# fixes permissions, renices itself and then calls setgid() and setuid() to
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# drop privileges
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allow greylist_milter_t self:capability { chown dac_read_search setgid setuid sys_nice };
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allow greylist_milter_t self:process { setsched getsched };
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allow greylist_milter_t self:tcp_socket create_stream_socket_perms;
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# It creates a pid file /var/run/milter-greylist.pid
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files_pid_filetrans(greylist_milter_t, greylist_milter_data_t, file)
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kernel_read_kernel_sysctls(greylist_milter_t)
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kernel_read_network_state(greylist_milter_t)
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corecmd_exec_bin(greylist_milter_t)
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corecmd_exec_shell(greylist_milter_t)
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corenet_tcp_bind_movaz_ssc_port(greylist_milter_t)
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corenet_tcp_connect_movaz_ssc_port(greylist_milter_t)
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corenet_tcp_bind_rtsclient_port(greylist_milter_t)
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# perl getgroups() reads a bunch of files in /etc
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# Allow the milter to read a GeoIP database in /usr/share
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# The milter runs from /var/lib/milter-greylist and maintains files there
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files_search_var_lib(greylist_milter_t)
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# Look up username for dropping privs
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auth_use_nsswitch(greylist_milter_t)
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optional_policy(`
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mysql_stream_connect(greylist_milter_t)
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')
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########################################
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#
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# milter-regex local policy
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# filter emails using regular expressions
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# http://www.benzedrine.cx/milter-regex.html
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#
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# It removes any existing socket (not owned by root) whilst running as root
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# and then calls setgid() and setuid() to drop privileges
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allow regex_milter_t self:capability { setuid setgid dac_read_search };
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# The milter's socket directory lives under /var/spool
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files_search_spool(regex_milter_t)
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# Look up username for dropping privs
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auth_use_nsswitch(regex_milter_t)
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########################################
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#
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# spamass-milter local policy
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# pipe emails through SpamAssassin
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# http://savannah.nongnu.org/projects/spamass-milt/
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#
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# The milter runs from /var/lib/spamass-milter
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allow spamass_milter_t spamass_milter_state_t:dir search_dir_perms;
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files_search_var_lib(spamass_milter_t)
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kernel_read_system_state(spamass_milter_t)
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# When used with -b or -B options, the milter invokes sendmail to send mail
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# to a spamtrap address, using popen()
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corecmd_exec_shell(spamass_milter_t)
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corecmd_read_bin_symlinks(spamass_milter_t)
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corecmd_search_bin(spamass_milter_t)
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auth_use_nsswitch(spamass_milter_t)
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mta_send_mail(spamass_milter_t)
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# The main job of the milter is to pipe spam through spamc and act on the result
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optional_policy(`
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spamassassin_domtrans_client(spamass_milter_t)
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')
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