1crontab_selinux(8) SELinux Policy crontab crontab_selinux(8)
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6 crontab_selinux - Security Enhanced Linux Policy for the crontab pro‐
7 cesses
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10 Security-Enhanced Linux secures the crontab processes via flexible
11 mandatory access control.
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13 The crontab processes execute with the crontab_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 crontab_t
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24 The crontab_t SELinux type can be entered via the crontab_exec_t file
25 type.
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27 The default entrypoint paths for the crontab_t domain are the follow‐
28 ing:
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30 /usr/bin/(f)?crontab, /usr/bin/at, /usr/sbin/fcronsighup,
31 /usr/libexec/fcronsighup
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34 SELinux defines process types (domains) for each process running on the
35 system
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37 You can see the context of a process using the -Z option to ps
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39 Policy governs the access confined processes have to files. SELinux
40 crontab policy is very flexible allowing users to setup their crontab
41 processes in as secure a method as possible.
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43 The following process types are defined for crontab:
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45 crontab_t
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47 Note: semanage permissive -a crontab_t can be used to make the process
48 type crontab_t permissive. SELinux does not deny access to permissive
49 process types, but the AVC (SELinux denials) messages are still gener‐
50 ated.
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54 SELinux policy is customizable based on least access required. crontab
55 policy is extremely flexible and has several booleans that allow you to
56 manipulate the policy and run crontab with the tightest access possi‐
57 ble.
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61 If you want to allow all domains to execute in fips_mode, you must turn
62 on the fips_mode boolean. Enabled by default.
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64 setsebool -P fips_mode 1
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68 If you want to allow system to run with NIS, you must turn on the
69 nis_enabled boolean. Disabled by default.
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71 setsebool -P nis_enabled 1
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76 The SELinux process type crontab_t can manage files labeled with the
77 following file types. The paths listed are the default paths for these
78 file types. Note the processes UID still need to have DAC permissions.
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80 crontab_tmp_t
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83 faillog_t
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85 /var/log/btmp.*
86 /var/log/faillog.*
87 /var/log/tallylog.*
88 /var/run/faillock(/.*)?
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90 krb5_host_rcache_t
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92 /var/tmp/krb5_0.rcache2
93 /var/cache/krb5rcache(/.*)?
94 /var/tmp/nfs_0
95 /var/tmp/DNS_25
96 /var/tmp/host_0
97 /var/tmp/imap_0
98 /var/tmp/HTTP_23
99 /var/tmp/HTTP_48
100 /var/tmp/ldap_55
101 /var/tmp/ldap_487
102 /var/tmp/ldapmap1_0
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104 var_auth_t
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106 /var/ace(/.*)?
107 /var/rsa(/.*)?
108 /var/lib/abl(/.*)?
109 /var/lib/rsa(/.*)?
110 /var/lib/pam_ssh(/.*)?
111 /var/lib/pam_shield(/.*)?
112 /var/opt/quest/vas/vasd(/.*)?
113 /var/lib/google-authenticator(/.*)?
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117 SELinux requires files to have an extended attribute to define the file
118 type.
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120 You can see the context of a file using the -Z option to ls
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122 Policy governs the access confined processes have to these files.
123 SELinux crontab policy is very flexible allowing users to setup their
124 crontab processes in as secure a method as possible.
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126 STANDARD FILE CONTEXT
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128 SELinux defines the file context types for the crontab, if you wanted
129 to store files with these types in a diffent paths, you need to execute
130 the semanage command to specify alternate labeling and then use re‐
131 storecon to put the labels on disk.
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133 semanage fcontext -a -t crontab_tmp_t '/srv/mycrontab_content(/.*)?'
134 restorecon -R -v /srv/mycrontab_content
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136 Note: SELinux often uses regular expressions to specify labels that
137 match multiple files.
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139 The following file types are defined for crontab:
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143 crontab_exec_t
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145 - Set files with the crontab_exec_t type, if you want to transition an
146 executable to the crontab_t domain.
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149 Paths:
150 /usr/bin/(f)?crontab, /usr/bin/at, /usr/sbin/fcronsighup,
151 /usr/libexec/fcronsighup
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154 crontab_tmp_t
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156 - Set files with the crontab_tmp_t type, if you want to store crontab
157 temporary files in the /tmp directories.
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161 Note: File context can be temporarily modified with the chcon command.
162 If you want to permanently change the file context you need to use the
163 semanage fcontext command. This will modify the SELinux labeling data‐
164 base. You will need to use restorecon to apply the labels.
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168 semanage fcontext can also be used to manipulate default file context
169 mappings.
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171 semanage permissive can also be used to manipulate whether or not a
172 process type is permissive.
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174 semanage module can also be used to enable/disable/install/remove pol‐
175 icy modules.
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177 semanage boolean can also be used to manipulate the booleans
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180 system-config-selinux is a GUI tool available to customize SELinux pol‐
181 icy settings.
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185 This manual page was auto-generated using sepolicy manpage .
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189 selinux(8), crontab(8), semanage(8), restorecon(8), chcon(1), sepol‐
190 icy(8), setsebool(8)
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194crontab 23-02-03 crontab_selinux(8)