passwd_selinux(8)

1passwd_selinux(8)            SELinux Policy passwd           passwd_selinux(8)
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NAME

6       passwd_selinux  -  Security  Enhanced  Linux Policy for the passwd pro‐
7       cesses
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DESCRIPTION

10       Security-Enhanced Linux  secures  the  passwd  processes  via  flexible
11       mandatory access control.
12
13       The  passwd  processes  execute with the passwd_t SELinux type. You can
14       check if you have these processes running by executing the  ps  command
15       with the -Z qualifier.
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17       For example:
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19       ps -eZ | grep passwd_t
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ENTRYPOINTS

24       The  passwd_t  SELinux  type  can be entered via the passwd_exec_t file
25       type.
26
27       The default entrypoint paths for the passwd_t domain are the following:
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29       /usr/bin/chage, /usr/bin/passwd, /usr/sbin/chpasswd
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PROCESS TYPES

32       SELinux defines process types (domains) for each process running on the
33       system
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35       You can see the context of a process using the -Z option to ps
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37       Policy  governs  the  access confined processes have to files.  SELinux
38       passwd policy is very flexible allowing users  to  setup  their  passwd
39       processes in as secure a method as possible.
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41       The following process types are defined for passwd:
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43       passwd_t
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45       Note:  semanage  permissive -a passwd_t can be used to make the process
46       type passwd_t permissive. SELinux does not deny  access  to  permissive
47       process  types, but the AVC (SELinux denials) messages are still gener‐
48       ated.
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BOOLEANS

52       SELinux policy is customizable based on least access required.   passwd
53       policy is extremely flexible and has several booleans that allow you to
54       manipulate the policy and run passwd with the tightest access possible.
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58       If you want to allow users to resolve user passwd entries directly from
59       ldap  rather  then  using  a  sssd server, you must turn on the authlo‐
60       gin_nsswitch_use_ldap boolean. Disabled by default.
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62       setsebool -P authlogin_nsswitch_use_ldap 1
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66       If you want to deny any process from ptracing or  debugging  any  other
67       processes,  you  must  turn  on  the  deny_ptrace  boolean.  Enabled by
68       default.
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70       setsebool -P deny_ptrace 1
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74       If you want to allow any process  to  mmap  any  file  on  system  with
75       attribute  file_type,  you must turn on the domain_can_mmap_files bool‐
76       ean. Enabled by default.
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78       setsebool -P domain_can_mmap_files 1
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82       If you want to allow all domains write to kmsg_device, while kernel  is
83       executed  with  systemd.log_target=kmsg parameter, you must turn on the
84       domain_can_write_kmsg boolean. Disabled by default.
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86       setsebool -P domain_can_write_kmsg 1
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90       If you want to allow all domains to use other domains file descriptors,
91       you must turn on the domain_fd_use boolean. Enabled by default.
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93       setsebool -P domain_fd_use 1
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97       If  you  want to allow all domains to have the kernel load modules, you
98       must  turn  on  the  domain_kernel_load_modules  boolean.  Disabled  by
99       default.
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101       setsebool -P domain_kernel_load_modules 1
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105       If you want to allow all domains to execute in fips_mode, you must turn
106       on the fips_mode boolean. Enabled by default.
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108       setsebool -P fips_mode 1
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112       If you want to enable reading of urandom for all domains, you must turn
113       on the global_ssp boolean. Disabled by default.
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115       setsebool -P global_ssp 1
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118
119       If  you  want  to allow confined applications to run with kerberos, you
120       must turn on the kerberos_enabled boolean. Enabled by default.
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122       setsebool -P kerberos_enabled 1
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126       If you want to allow system to run with  NIS,  you  must  turn  on  the
127       nis_enabled boolean. Disabled by default.
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129       setsebool -P nis_enabled 1
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133       If  you  want to allow confined applications to use nscd shared memory,
134       you must turn on the nscd_use_shm boolean. Disabled by default.
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136       setsebool -P nscd_use_shm 1
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140       If you want to allow samba to act as the domain controller, add  users,
141       groups  and  change  passwords,  you must turn on the samba_domain_con‐
142       troller boolean. Disabled by default.
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144       setsebool -P samba_domain_controller 1
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MANAGED FILES

149       The SELinux process type passwd_t can manage  files  labeled  with  the
150       following file types.  The paths listed are the default paths for these
151       file types.  Note the processes UID still need to have DAC permissions.
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153       faillog_t
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155            /var/log/btmp.*
156            /var/log/faillog.*
157            /var/log/tallylog.*
158            /var/run/faillock(/.*)?
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160       krb5_host_rcache_t
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162            /var/cache/krb5rcache(/.*)?
163            /var/tmp/nfs_0
164            /var/tmp/DNS_25
165            /var/tmp/host_0
166            /var/tmp/imap_0
167            /var/tmp/HTTP_23
168            /var/tmp/HTTP_48
169            /var/tmp/ldap_55
170            /var/tmp/ldap_487
171            /var/tmp/ldapmap1_0
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173       lastlog_t
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175            /var/log/lastlog.*
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177       passwd_file_t
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179            /etc/group[-+]?
180            /etc/passwd[-+]?
181            /etc/passwd.adjunct.*
182            /etc/ptmptmp
183            /etc/.pwd.lock
184            /etc/group.lock
185            /etc/passwd.OLD
186            /etc/passwd.lock
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188       security_t
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190            /selinux
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192       shadow_t
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194            /etc/shadow.*
195            /etc/gshadow.*
196            /etc/nshadow.*
197            /var/db/shadow.*
198            /etc/security/opasswd
199            /etc/security/opasswd.old
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201       user_tmp_t
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203            /dev/shm/mono.*
204            /var/run/user(/.*)?
205            /tmp/.X11-unix(/.*)?
206            /tmp/.ICE-unix(/.*)?
207            /dev/shm/pulse-shm.*
208            /tmp/.X0-lock
209            /tmp/hsperfdata_root
210            /var/tmp/hsperfdata_root
211            /home/[^/]+/tmp
212            /home/[^/]+/.tmp
213            /tmp/gconfd-[^/]+
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FILE CONTEXTS

217       SELinux requires files to have an extended attribute to define the file
218       type.
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220       You can see the context of a file using the -Z option to ls
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222       Policy  governs  the  access  confined  processes  have to these files.
223       SELinux passwd policy is very flexible allowing users  to  setup  their
224       passwd processes in as secure a method as possible.
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226       STANDARD FILE CONTEXT
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228       SELinux defines the file context types for the passwd, if you wanted to
229       store files with these types in a diffent paths, you  need  to  execute
230       the  semanage  command  to  sepecify  alternate  labeling  and then use
231       restorecon to put the labels on disk.
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233       semanage fcontext -a -t passwd_file_t '/srv/mypasswd_content(/.*)?'
234       restorecon -R -v /srv/mypasswd_content
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236       Note: SELinux often uses regular expressions  to  specify  labels  that
237       match multiple files.
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239       The following file types are defined for passwd:
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243       passwd_exec_t
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245       -  Set  files with the passwd_exec_t type, if you want to transition an
246       executable to the passwd_t domain.
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249       Paths:
250            /usr/bin/chage, /usr/bin/passwd, /usr/sbin/chpasswd
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253       passwd_file_t
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255       - Set files with the passwd_file_t type, if you want to treat the files
256       as passwd content.
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259       Paths:
260            /etc/group[-+]?,      /etc/passwd[-+]?,     /etc/passwd.adjunct.*,
261            /etc/ptmptmp,  /etc/.pwd.lock,  /etc/group.lock,  /etc/passwd.OLD,
262            /etc/passwd.lock
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264
265       Note:  File context can be temporarily modified with the chcon command.
266       If you want to permanently change the file context you need to use  the
267       semanage fcontext command.  This will modify the SELinux labeling data‐
268       base.  You will need to use restorecon to apply the labels.
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COMMANDS

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

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