1install_selinux(8) SELinux Policy install install_selinux(8)
2
6 install_selinux - Security Enhanced Linux Policy for the install pro‐
7 cesses
8
10 Security-Enhanced Linux secures the install processes via flexible
11 mandatory access control.
12 The install processes execute with the install_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 install_t
20
24 The install_t SELinux type can be entered via the install_exec_t file
25 type.
26 The default entrypoint paths for the install_t domain are the follow‐
28 ing:
29 /usr/bin/ostree, /usr/sbin/anaconda, /usr/bin/rpm-ostree, /usr/bin/ini‐
31 tial-setup, /usr/libexec/rpm-ostreed, /usr/libexec/anaconda/anaconda-
32 yum
33
35 SELinux defines process types (domains) for each process running on the
36 system
37 You can see the context of a process using the -Z option to ps
39 Policy governs the access confined processes have to files. SELinux
41 install policy is very flexible allowing users to setup their install
42 processes in as secure a method as possible.
43 The following process types are defined for install:
45 install_t
47 Note: semanage permissive -a install_t can be used to make the process
49 type install_t permissive. SELinux does not deny access to permissive
50 process types, but the AVC (SELinux denials) messages are still gener‐
51 ated.
52
55 SELinux policy is customizable based on least access required. install
56 policy is extremely flexible and has several booleans that allow you to
57 manipulate the policy and run install with the tightest access possi‐
58 ble.
59 If you want to deny user domains applications to map a memory region as
63 both executable and writable, this is dangerous and the executable
64 should be reported in bugzilla, you must turn on the deny_execmem bool‐
65 ean. Enabled by default.
66 setsebool -P deny_execmem 1
68 If you want to deny any process from ptracing or debugging any other
72 processes, you must turn on the deny_ptrace boolean. Enabled by
73 default.
74 setsebool -P deny_ptrace 1
76 If you want to allow all domains to execute in fips_mode, you must turn
80 on the fips_mode boolean. Enabled by default.
81 setsebool -P fips_mode 1
83 If you want to control the ability to mmap a low area of the address
87 space, as configured by /proc/sys/vm/mmap_min_addr, you must turn on
88 the mmap_low_allowed boolean. Disabled by default.
89 setsebool -P mmap_low_allowed 1
91 If you want to disable kernel module loading, you must turn on the
95 secure_mode_insmod boolean. Enabled by default.
96 setsebool -P secure_mode_insmod 1
98 If you want to allow unconfined executables to make their heap memory
102 executable. Doing this is a really bad idea. Probably indicates a
103 badly coded executable, but could indicate an attack. This executable
104 should be reported in bugzilla, you must turn on the selin‐
105 uxuser_execheap boolean. Disabled by default.
106 setsebool -P selinuxuser_execheap 1
108 If you want to allow unconfined executables to make their stack exe‐
112 cutable. This should never, ever be necessary. Probably indicates a
113 badly coded executable, but could indicate an attack. This executable
114 should be reported in bugzilla, you must turn on the selinuxuser_exec‐
115 stack boolean. Enabled by default.
116 setsebool -P selinuxuser_execstack 1
118
122 The SELinux process type install_t can manage files labeled with the
123 following file types. The paths listed are the default paths for these
124 file types. Note the processes UID still need to have DAC permissions.
125 file_type
127 all files on the system
129
132 SELinux requires files to have an extended attribute to define the file
133 type.
134 You can see the context of a file using the -Z option to ls
136 Policy governs the access confined processes have to these files.
138 SELinux install policy is very flexible allowing users to setup their
139 install processes in as secure a method as possible.
140 The following file types are defined for install:
142 install_exec_t
146 - Set files with the install_exec_t type, if you want to transition an
148 executable to the install_t domain.
149 Paths:
152 /usr/bin/ostree, /usr/sbin/anaconda, /usr/bin/rpm-ostree,
153 /usr/bin/initial-setup, /usr/libexec/rpm-ostreed,
154 /usr/libexec/anaconda/anaconda-yum
155 Note: File context can be temporarily modified with the chcon command.
158 If you want to permanently change the file context you need to use the
159 semanage fcontext command. This will modify the SELinux labeling data‐
160 base. You will need to use restorecon to apply the labels.
161
164 semanage fcontext can also be used to manipulate default file context
165 mappings.
166 semanage permissive can also be used to manipulate whether or not a
168 process type is permissive.
169 semanage module can also be used to enable/disable/install/remove pol‐
171 icy modules.
172 semanage boolean can also be used to manipulate the booleans
174 system-config-selinux is a GUI tool available to customize SELinux pol‐
177 icy settings.
178
181 This manual page was auto-generated using sepolicy manpage .
182
185 selinux(8), install(8), semanage(8), restorecon(8), chcon(1), sepol‐
186 icy(8), setsebool(8)
187install 19-06-18 install_selinux(8)