system_mail_selinux(8)

1system_mail_selinux(8)    SELinux Policy system_mail    system_mail_selinux(8)
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NAME

6       system_mail_selinux  -  Security  Enhanced  Linux  Policy  for the sys‐
7       tem_mail processes
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DESCRIPTION

10       Security-Enhanced Linux secures the system_mail processes via  flexible
11       mandatory access control.
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13       The  system_mail processes execute with the system_mail_t SELinux type.
14       You can check if you have these processes running by executing  the  ps
15       command with the -Z qualifier.
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17       For example:
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19       ps -eZ | grep system_mail_t
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ENTRYPOINTS

24       The  system_mail_t  SELinux  type can be entered via the mta_exec_type,
25       sendmail_exec_t file types.
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27       The default entrypoint paths for the system_mail_t domain are the  fol‐
28       lowing:
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30       /usr/sbin/sendmail(.sendmail)?,     /usr/bin/esmtp,    /usr/sbin/rmail,
31       /usr/sbin/ssmtp,      /usr/lib/sendmail,       /var/qmail/bin/sendmail,
32       /usr/sbin/sendmail.postfix
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PROCESS TYPES

35       SELinux defines process types (domains) for each process running on the
36       system
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38       You can see the context of a process using the -Z option to ps
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40       Policy governs the access confined processes have  to  files.   SELinux
41       system_mail  policy is very flexible allowing users to setup their sys‐
42       tem_mail processes in as secure a method as possible.
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44       The following process types are defined for system_mail:
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46       system_mail_t
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48       Note: semanage permissive -a system_mail_t can  be  used  to  make  the
49       process  type system_mail_t permissive. SELinux does not deny access to
50       permissive process types, but the AVC (SELinux  denials)  messages  are
51       still generated.
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BOOLEANS

55       SELinux  policy  is  customizable based on least access required.  sys‐
56       tem_mail policy is extremely flexible and  has  several  booleans  that
57       allow  you to manipulate the policy and run system_mail with the tight‐
58       est access possible.
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62       If you want to allow users to resolve user passwd entries directly from
63       ldap  rather  then  using  a  sssd server, you must turn on the authlo‐
64       gin_nsswitch_use_ldap boolean. Disabled by default.
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66       setsebool -P authlogin_nsswitch_use_ldap 1
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70       If you want to deny any process from ptracing or  debugging  any  other
71       processes,  you  must  turn  on  the  deny_ptrace  boolean.  Enabled by
72       default.
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74       setsebool -P deny_ptrace 1
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78       If you want to allow any process  to  mmap  any  file  on  system  with
79       attribute  file_type,  you must turn on the domain_can_mmap_files bool‐
80       ean. Enabled by default.
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82       setsebool -P domain_can_mmap_files 1
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86       If you want to allow all domains write to kmsg_device, while kernel  is
87       executed  with  systemd.log_target=kmsg parameter, you must turn on the
88       domain_can_write_kmsg boolean. Disabled by default.
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90       setsebool -P domain_can_write_kmsg 1
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94       If you want to allow all domains to use other domains file descriptors,
95       you must turn on the domain_fd_use boolean. Enabled by default.
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97       setsebool -P domain_fd_use 1
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101       If  you  want to allow all domains to have the kernel load modules, you
102       must  turn  on  the  domain_kernel_load_modules  boolean.  Disabled  by
103       default.
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105       setsebool -P domain_kernel_load_modules 1
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109       If you want to allow all domains to execute in fips_mode, you must turn
110       on the fips_mode boolean. Enabled by default.
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112       setsebool -P fips_mode 1
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116       If you want to determine whether Gitosis can send mail, you  must  turn
117       on the gitosis_can_sendmail boolean. Disabled by default.
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119       setsebool -P gitosis_can_sendmail 1
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123       If you want to enable reading of urandom for all domains, you must turn
124       on the global_ssp boolean. Disabled by default.
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126       setsebool -P global_ssp 1
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130       If you want to allow http daemon to send mail, you  must  turn  on  the
131       httpd_can_sendmail boolean. Disabled by default.
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133       setsebool -P httpd_can_sendmail 1
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137       If  you  want  to allow confined applications to run with kerberos, you
138       must turn on the kerberos_enabled boolean. Enabled by default.
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140       setsebool -P kerberos_enabled 1
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144       If you want to allow system to run with  NIS,  you  must  turn  on  the
145       nis_enabled boolean. Disabled by default.
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147       setsebool -P nis_enabled 1
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151       If  you  want to allow confined applications to use nscd shared memory,
152       you must turn on the nscd_use_shm boolean. Disabled by default.
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154       setsebool -P nscd_use_shm 1
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158       If you want to support NFS home  directories,  you  must  turn  on  the
159       use_nfs_home_dirs boolean. Disabled by default.
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161       setsebool -P use_nfs_home_dirs 1
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165       If  you  want  to  support SAMBA home directories, you must turn on the
166       use_samba_home_dirs boolean. Disabled by default.
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168       setsebool -P use_samba_home_dirs 1
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MANAGED FILES

173       The SELinux process type system_mail_t can manage  files  labeled  with
174       the  following  file types.  The paths listed are the default paths for
175       these file types.  Note the processes UID still need to have  DAC  per‐
176       missions.
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178       anon_inodefs_t
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181       arpwatch_tmp_t
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184       cifs_t
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187       courier_spool_t
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189            /var/spool/courier(/.*)?
190            /var/spool/authdaemon(/.*)?
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192       etc_aliases_t
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194            /etc/mail/.*.db
195            /etc/mail/aliases.*
196            /etc/postfix/aliases.*
197            /etc/aliases
198            /etc/aliases.db
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200       exim_log_t
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202            /var/log/exim[0-9]?(/.*)?
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204       exim_spool_t
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206            /var/spool/exim[0-9]?(/.*)?
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208       mail_home_rw_t
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210            /root/Maildir(/.*)?
211            /root/.esmtp_queue(/.*)?
212            /home/[^/]+/.maildir(/.*)?
213            /home/[^/]+/Maildir(/.*)?
214            /home/[^/]+/.esmtp_queue(/.*)?
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216       mail_home_t
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218            /root/.mailrc
219            /root/.forward
220            /root/dead.letter
221            /home/[^/]+/.forward[^/]*
222            /home/[^/]+/.mailrc
223            /home/[^/]+/dead.letter
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225       mail_spool_t
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227            /var/mail(/.*)?
228            /var/spool/imap(/.*)?
229            /var/spool/mail(/.*)?
230            /var/spool/smtpd(/.*)?
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232       mqueue_spool_t
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234            /var/spool/(client)?mqueue(/.*)?
235            /var/spool/mqueue.in(/.*)?
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237       munin_var_lib_t
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239            /var/lib/munin(/.*)?
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241       nfs_t
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244       qmail_spool_t
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246            /var/qmail/queue(/.*)?
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248       sendmail_log_t
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250            /var/log/mail(/.*)?
251            /var/log/sendmail.st.*
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253       system_mail_tmp_t
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256       uucpd_spool_t
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258            /var/spool/uucp(/.*)?
259            /var/spool/uucppublic(/.*)?
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COMMANDS

263       semanage  fcontext  can also be used to manipulate default file context
264       mappings.
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266       semanage permissive can also be used to manipulate  whether  or  not  a
267       process type is permissive.
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269       semanage  module can also be used to enable/disable/install/remove pol‐
270       icy modules.
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272       semanage boolean can also be used to manipulate the booleans
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275       system-config-selinux is a GUI tool available to customize SELinux pol‐
276       icy settings.
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AUTHOR

280       This manual page was auto-generated using sepolicy manpage .
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