1thin_selinux(8) SELinux Policy thin thin_selinux(8)
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6 thin_selinux - Security Enhanced Linux Policy for the thin processes
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9 Security-Enhanced Linux secures the thin processes via flexible manda‐
10 tory access control.
11 The thin processes execute with the thin_t SELinux type. You can check
13 if you have these processes running by executing the ps command with
14 the -Z qualifier.
15 For example:
17 ps -eZ | grep thin_t
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23 The thin_t SELinux type can be entered via the file_type, thin_exec_t,
24 unlabeled_t, proc_type, filesystem_type, mtrr_device_t, sysctl_type
25 file types.
26 The default entrypoint paths for the thin_t domain are the following:
28 all files on the system, /usr/bin/thin, /dev/cpu/mtrr
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32 SELinux defines process types (domains) for each process running on the
33 system
34 You can see the context of a process using the -Z option to ps
36 Policy governs the access confined processes have to files. SELinux
38 thin policy is very flexible allowing users to setup their thin pro‐
39 cesses in as secure a method as possible.
40 The following process types are defined for thin:
42 thin_t
44 Note: semanage permissive -a thin_t can be used to make the process
46 type thin_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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52 SELinux policy is customizable based on least access required. thin
53 policy is extremely flexible and has several booleans that allow you to
54 manipulate the policy and run thin with the tightest access possible.
55 If you want to allow all daemons to write corefiles to /, you must turn
59 on the allow_daemons_dump_core boolean. Disabled by default.
60 setsebool -P allow_daemons_dump_core 1
62 If you want to allow all daemons to use tcp wrappers, you must turn on
66 the allow_daemons_use_tcp_wrapper boolean. Disabled by default.
67 setsebool -P allow_daemons_use_tcp_wrapper 1
69 If you want to allow all daemons the ability to read/write terminals,
73 you must turn on the allow_daemons_use_tty boolean. Disabled by
74 default.
75 setsebool -P allow_daemons_use_tty 1
77 If you want to allow all domains to use other domains file descriptors,
81 you must turn on the allow_domain_fd_use boolean. Enabled by default.
82 setsebool -P allow_domain_fd_use 1
84 If you want to allow unconfined executables to make their heap memory
88 executable. Doing this is a really bad idea. Probably indicates a
89 badly coded executable, but could indicate an attack. This executable
90 should be reported in bugzilla, you must turn on the allow_execheap
91 boolean. Disabled by default.
92 setsebool -P allow_execheap 1
94 If you want to allow unconfined executables to map a memory region as
98 both executable and writable, this is dangerous and the executable
99 should be reported in bugzilla), you must turn on the allow_execmem
100 boolean. Enabled by default.
101 setsebool -P allow_execmem 1
103 If you want to allow all unconfined executables to use libraries
107 requiring text relocation that are not labeled textrel_shlib_t), you
108 must turn on the allow_execmod boolean. Enabled by default.
109 setsebool -P allow_execmod 1
111 If you want to allow unconfined executables to make their stack exe‐
115 cutable. This should never, ever be necessary. Probably indicates a
116 badly coded executable, but could indicate an attack. This executable
117 should be reported in bugzilla), you must turn on the allow_execstack
118 boolean. Enabled by default.
119 setsebool -P allow_execstack 1
121 If you want to allow sysadm to debug or ptrace all processes, you must
125 turn on the allow_ptrace boolean. Disabled by default.
126 setsebool -P allow_ptrace 1
128 If you want to enable cluster mode for daemons, you must turn on the
132 daemons_enable_cluster_mode boolean. Disabled by default.
133 setsebool -P daemons_enable_cluster_mode 1
135 If you want to allow all domains to have the kernel load modules, you
139 must turn on the domain_kernel_load_modules boolean. Disabled by
140 default.
141 setsebool -P domain_kernel_load_modules 1
143 If you want to allow all domains to execute in fips_mode, you must turn
147 on the fips_mode boolean. Enabled by default.
148 setsebool -P fips_mode 1
150 If you want to enable reading of urandom for all domains, you must turn
154 on the global_ssp boolean. Disabled by default.
155 setsebool -P global_ssp 1
157 If you want to enable support for upstart as the init program, you must
161 turn on the init_upstart boolean. Enabled by default.
162 setsebool -P init_upstart 1
164 If you want to allow certain domains to map low memory in the kernel,
168 you must turn on the mmap_low_allowed boolean. Disabled by default.
169 setsebool -P mmap_low_allowed 1
171 If you want to boolean to determine whether the system permits loading
175 policy, setting enforcing mode, and changing boolean values. Set this
176 to true and you have to reboot to set it back, you must turn on the
177 secure_mode_policyload boolean. Disabled by default.
178 setsebool -P secure_mode_policyload 1
180 If you want to support X userspace object manager, you must turn on the
184 xserver_object_manager boolean. Disabled by default.
185 setsebool -P xserver_object_manager 1
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191 The SELinux process type thin_t can manage files labeled with the fol‐
192 lowing file types. The paths listed are the default paths for these
193 file types. Note the processes UID still need to have DAC permissions.
194 file_type
196 all files on the system
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201 SELinux requires files to have an extended attribute to define the file
202 type.
203 You can see the context of a file using the -Z option to ls
205 Policy governs the access confined processes have to these files.
207 SELinux thin policy is very flexible allowing users to setup their thin
208 processes in as secure a method as possible.
209 STANDARD FILE CONTEXT
211 SELinux defines the file context types for the thin, if you wanted to
213 store files with these types in a diffent paths, you need to execute
214 the semanage command to sepecify alternate labeling and then use
215 restorecon to put the labels on disk.
216 semanage fcontext -a -t thin_var_run_t '/srv/mythin_content(/.*)?'
218 restorecon -R -v /srv/mythin_content
219 Note: SELinux often uses regular expressions to specify labels that
221 match multiple files.
222 The following file types are defined for thin:
224 thin_exec_t
228 - Set files with the thin_exec_t type, if you want to transition an
230 executable to the thin_t domain.
231 thin_var_run_t
235 - Set files with the thin_var_run_t type, if you want to store the thin
237 files under the /run or /var/run directory.
238 Note: File context can be temporarily modified with the chcon command.
242 If you want to permanently change the file context you need to use the
243 semanage fcontext command. This will modify the SELinux labeling data‐
244 base. You will need to use restorecon to apply the labels.
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248 semanage fcontext can also be used to manipulate default file context
249 mappings.
250 semanage permissive can also be used to manipulate whether or not a
252 process type is permissive.
253 semanage module can also be used to enable/disable/install/remove pol‐
255 icy modules.
256 semanage boolean can also be used to manipulate the booleans
258 system-config-selinux is a GUI tool available to customize SELinux pol‐
261 icy settings.
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265 This manual page was auto-generated using sepolicy manpage .
266
269 selinux(8), thin(8), semanage(8), restorecon(8), chcon(1) , setse‐
270 bool(8)
271thin 15-06-03 thin_selinux(8)