1nova_cert_selinux(8) SELinux Policy nova_cert nova_cert_selinux(8)
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6 nova_cert_selinux - Security Enhanced Linux Policy for the nova_cert
7 processes
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10 Security-Enhanced Linux secures the nova_cert processes via flexible
11 mandatory access control.
12 The nova_cert processes execute with the nova_cert_t SELinux type. You
14 can check if you have these processes running by executing the ps com‐
15 mand with the -Z qualifier.
16 For example:
18 ps -eZ | grep nova_cert_t
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24 The nova_cert_t SELinux type can be entered via the file_type,
25 nova_cert_exec_t, unlabeled_t, proc_type, filesystem_type,
26 mtrr_device_t, sysctl_type file types.
27 The default entrypoint paths for the nova_cert_t domain are the follow‐
29 ing:
30 all files on the system, /usr/bin/nova-cert, /dev/cpu/mtrr
32
34 SELinux defines process types (domains) for each process running on the
35 system
36 You can see the context of a process using the -Z option to ps
38 Policy governs the access confined processes have to files. SELinux
40 nova_cert policy is very flexible allowing users to setup their
41 nova_cert processes in as secure a method as possible.
42 The following process types are defined for nova_cert:
44 nova_cert_t
46 Note: semanage permissive -a nova_cert_t can be used to make the
48 process type nova_cert_t permissive. SELinux does not deny access to
49 permissive process types, but the AVC (SELinux denials) messages are
50 still generated.
51
54 SELinux policy is customizable based on least access required.
55 nova_cert policy is extremely flexible and has several booleans that
56 allow you to manipulate the policy and run nova_cert with the tightest
57 access possible.
58 If you want to allow all daemons to write corefiles to /, you must turn
62 on the allow_daemons_dump_core boolean. Disabled by default.
63 setsebool -P allow_daemons_dump_core 1
65 If you want to allow all daemons to use tcp wrappers, you must turn on
69 the allow_daemons_use_tcp_wrapper boolean. Disabled by default.
70 setsebool -P allow_daemons_use_tcp_wrapper 1
72 If you want to allow all daemons the ability to read/write terminals,
76 you must turn on the allow_daemons_use_tty boolean. Disabled by
77 default.
78 setsebool -P allow_daemons_use_tty 1
80 If you want to allow all domains to use other domains file descriptors,
84 you must turn on the allow_domain_fd_use boolean. Enabled by default.
85 setsebool -P allow_domain_fd_use 1
87 If you want to allow unconfined executables to make their heap memory
91 executable. Doing this is a really bad idea. Probably indicates a
92 badly coded executable, but could indicate an attack. This executable
93 should be reported in bugzilla, you must turn on the allow_execheap
94 boolean. Disabled by default.
95 setsebool -P allow_execheap 1
97 If you want to allow unconfined executables to map a memory region as
101 both executable and writable, this is dangerous and the executable
102 should be reported in bugzilla), you must turn on the allow_execmem
103 boolean. Enabled by default.
104 setsebool -P allow_execmem 1
106 If you want to allow all unconfined executables to use libraries
110 requiring text relocation that are not labeled textrel_shlib_t), you
111 must turn on the allow_execmod boolean. Enabled by default.
112 setsebool -P allow_execmod 1
114 If you want to allow unconfined executables to make their stack exe‐
118 cutable. This should never, ever be necessary. Probably indicates a
119 badly coded executable, but could indicate an attack. This executable
120 should be reported in bugzilla), you must turn on the allow_execstack
121 boolean. Enabled by default.
122 setsebool -P allow_execstack 1
124 If you want to allow sysadm to debug or ptrace all processes, you must
128 turn on the allow_ptrace boolean. Disabled by default.
129 setsebool -P allow_ptrace 1
131 If you want to enable cluster mode for daemons, you must turn on the
135 daemons_enable_cluster_mode boolean. Disabled by default.
136 setsebool -P daemons_enable_cluster_mode 1
138 If you want to allow all domains to have the kernel load modules, you
142 must turn on the domain_kernel_load_modules boolean. Disabled by
143 default.
144 setsebool -P domain_kernel_load_modules 1
146 If you want to allow all domains to execute in fips_mode, you must turn
150 on the fips_mode boolean. Enabled by default.
151 setsebool -P fips_mode 1
153 If you want to enable reading of urandom for all domains, you must turn
157 on the global_ssp boolean. Disabled by default.
158 setsebool -P global_ssp 1
160 If you want to enable support for upstart as the init program, you must
164 turn on the init_upstart boolean. Enabled by default.
165 setsebool -P init_upstart 1
167 If you want to allow certain domains to map low memory in the kernel,
171 you must turn on the mmap_low_allowed boolean. Disabled by default.
172 setsebool -P mmap_low_allowed 1
174 If you want to boolean to determine whether the system permits loading
178 policy, setting enforcing mode, and changing boolean values. Set this
179 to true and you have to reboot to set it back, you must turn on the
180 secure_mode_policyload boolean. Disabled by default.
181 setsebool -P secure_mode_policyload 1
183 If you want to support X userspace object manager, you must turn on the
187 xserver_object_manager boolean. Disabled by default.
188 setsebool -P xserver_object_manager 1
190
194 The SELinux process type nova_cert_t can manage files labeled with the
195 following file types. The paths listed are the default paths for these
196 file types. Note the processes UID still need to have DAC permissions.
197 file_type
199 all files on the system
201
204 SELinux requires files to have an extended attribute to define the file
205 type.
206 You can see the context of a file using the -Z option to ls
208 Policy governs the access confined processes have to these files.
210 SELinux nova_cert policy is very flexible allowing users to setup their
211 nova_cert processes in as secure a method as possible.
212 STANDARD FILE CONTEXT
214 SELinux defines the file context types for the nova_cert, if you wanted
216 to store files with these types in a diffent paths, you need to execute
217 the semanage command to sepecify alternate labeling and then use
218 restorecon to put the labels on disk.
219 semanage fcontext -a -t nova_cert_tmp_t '/srv/mynova_cert_con‐
221 tent(/.*)?'
222 restorecon -R -v /srv/mynova_cert_content
223 Note: SELinux often uses regular expressions to specify labels that
225 match multiple files.
226 The following file types are defined for nova_cert:
228 nova_cert_exec_t
232 - Set files with the nova_cert_exec_t type, if you want to transition
234 an executable to the nova_cert_t domain.
235 nova_cert_initrc_exec_t
239 - Set files with the nova_cert_initrc_exec_t type, if you want to tran‐
241 sition an executable to the nova_cert_initrc_t domain.
242 nova_cert_tmp_t
246 - Set files with the nova_cert_tmp_t type, if you want to store nova
248 cert temporary files in the /tmp directories.
249 Note: File context can be temporarily modified with the chcon command.
253 If you want to permanently change the file context you need to use the
254 semanage fcontext command. This will modify the SELinux labeling data‐
255 base. You will need to use restorecon to apply the labels.
256
259 semanage fcontext can also be used to manipulate default file context
260 mappings.
261 semanage permissive can also be used to manipulate whether or not a
263 process type is permissive.
264 semanage module can also be used to enable/disable/install/remove pol‐
266 icy modules.
267 semanage boolean can also be used to manipulate the booleans
269 system-config-selinux is a GUI tool available to customize SELinux pol‐
272 icy settings.
273
276 This manual page was auto-generated using sepolicy manpage .
277
280 selinux(8), nova_cert(8), semanage(8), restorecon(8), chcon(1) , setse‐
281 bool(8)
282nova_cert 15-06-03 nova_cert_selinux(8)