1vmtools_selinux(8) SELinux Policy vmtools vmtools_selinux(8)
2
6 vmtools_selinux - Security Enhanced Linux Policy for the vmtools pro‐
7 cesses
8
10 Security-Enhanced Linux secures the vmtools processes via flexible
11 mandatory access control.
12 The vmtools processes execute with the vmtools_t SELinux type. You can
14 check if you have these processes running by executing the ps command
15 with the -Z qualifier.
16 For example:
18 ps -eZ | grep vmtools_t
20
24 The vmtools_t SELinux type can be entered via the vmtools_exec_t file
25 type.
26 The default entrypoint paths for the vmtools_t domain are the follow‐
28 ing:
29 /usr/bin/vmtoolsd, /usr/bin/VGAuthService
31
33 SELinux defines process types (domains) for each process running on the
34 system
35 You can see the context of a process using the -Z option to ps
37 Policy governs the access confined processes have to files. SELinux
39 vmtools policy is very flexible allowing users to setup their vmtools
40 processes in as secure a method as possible.
41 The following process types are defined for vmtools:
43 vmtools_t, vmtools_helper_t, vmtools_unconfined_t
45 Note: semanage permissive -a vmtools_t can be used to make the process
47 type vmtools_t permissive. SELinux does not deny access to permissive
48 process types, but the AVC (SELinux denials) messages are still gener‐
49 ated.
50
53 SELinux policy is customizable based on least access required. vmtools
54 policy is extremely flexible and has several booleans that allow you to
55 manipulate the policy and run vmtools with the tightest access possi‐
56 ble.
57 If you want to deny user domains applications to map a memory region as
61 both executable and writable, this is dangerous and the executable
62 should be reported in bugzilla, you must turn on the deny_execmem bool‐
63 ean. Enabled by default.
64 setsebool -P deny_execmem 1
66 If you want to control the ability to mmap a low area of the address
70 space, as configured by /proc/sys/vm/mmap_min_addr, you must turn on
71 the mmap_low_allowed boolean. Disabled by default.
72 setsebool -P mmap_low_allowed 1
74 If you want to disable kernel module loading, you must turn on the
78 secure_mode_insmod boolean. Enabled by default.
79 setsebool -P secure_mode_insmod 1
81 If you want to allow unconfined executables to make their heap memory
85 executable. Doing this is a really bad idea. Probably indicates a
86 badly coded executable, but could indicate an attack. This executable
87 should be reported in bugzilla, you must turn on the selin‐
88 uxuser_execheap boolean. Disabled by default.
89 setsebool -P selinuxuser_execheap 1
91 If you want to allow unconfined executables to make their stack exe‐
95 cutable. This should never, ever be necessary. Probably indicates a
96 badly coded executable, but could indicate an attack. This executable
97 should be reported in bugzilla, you must turn on the selinuxuser_exec‐
98 stack boolean. Disabled by default.
99 setsebool -P selinuxuser_execstack 1
101
105 The SELinux process type vmtools_t can manage files labeled with the
106 following file types. The paths listed are the default paths for these
107 file types. Note the processes UID still need to have DAC permissions.
108 file_type
110 all files on the system
112
115 SELinux requires files to have an extended attribute to define the file
116 type.
117 You can see the context of a file using the -Z option to ls
119 Policy governs the access confined processes have to these files.
121 SELinux vmtools policy is very flexible allowing users to setup their
122 vmtools processes in as secure a method as possible.
123 STANDARD FILE CONTEXT
125 SELinux defines the file context types for the vmtools, if you wanted
127 to store files with these types in a diffent paths, you need to execute
128 the semanage command to sepecify alternate labeling and then use
129 restorecon to put the labels on disk.
130 semanage fcontext -a -t vmtools_tmp_t '/srv/myvmtools_content(/.*)?'
132 restorecon -R -v /srv/myvmtools_content
133 Note: SELinux often uses regular expressions to specify labels that
135 match multiple files.
136 The following file types are defined for vmtools:
138 vmtools_exec_t
142 - Set files with the vmtools_exec_t type, if you want to transition an
144 executable to the vmtools_t domain.
145 Paths:
148 /usr/bin/vmtoolsd, /usr/bin/VGAuthService
149 vmtools_helper_exec_t
152 - Set files with the vmtools_helper_exec_t type, if you want to transi‐
154 tion an executable to the vmtools_helper_t domain.
155 vmtools_tmp_t
159 - Set files with the vmtools_tmp_t type, if you want to store vmtools
161 temporary files in the /tmp directories.
162 vmtools_unconfined_exec_t
166 - Set files with the vmtools_unconfined_exec_t type, if you want to
168 transition an executable to the vmtools_unconfined_t domain.
169 vmtools_unit_file_t
173 - Set files with the vmtools_unit_file_t type, if you want to treat the
175 files as vmtools unit content.
176 Note: File context can be temporarily modified with the chcon command.
180 If you want to permanently change the file context you need to use the
181 semanage fcontext command. This will modify the SELinux labeling data‐
182 base. You will need to use restorecon to apply the labels.
183
186 semanage fcontext can also be used to manipulate default file context
187 mappings.
188 semanage permissive can also be used to manipulate whether or not a
190 process type is permissive.
191 semanage module can also be used to enable/disable/install/remove pol‐
193 icy modules.
194 semanage boolean can also be used to manipulate the booleans
196 system-config-selinux is a GUI tool available to customize SELinux pol‐
199 icy settings.
200
203 This manual page was auto-generated using sepolicy manpage .
204
207 selinux(8), vmtools(8), semanage(8), restorecon(8), chcon(1), sepol‐
208 icy(8), setsebool(8), vmtools_helper_selinux(8),
209 vmtools_helper_selinux(8), vmtools_unconfined_selinux(8),
210 vmtools_unconfined_selinux(8)
211vmtools 20-05-05 vmtools_selinux(8)