install_selinux(8)

1install_selinux(8)          SELinux Policy install          install_selinux(8)
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NAME

6       install_selinux  -  Security Enhanced Linux Policy for the install pro‐
7       cesses
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DESCRIPTION

10       Security-Enhanced Linux secures  the  install  processes  via  flexible
11       mandatory access control.
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13       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.
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17       For example:
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19       ps -eZ | grep install_t
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ENTRYPOINTS

24       The  install_t  SELinux type can be entered via the install_exec_t file
25       type.
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27       The default entrypoint paths for the install_t domain are  the  follow‐
28       ing:
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30       /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
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PROCESS TYPES

35       SELinux defines process types (domains) for each process running on the
36       system
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38       You can see the context of a process using the -Z option to ps
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40       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.
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44       The following process types are defined for install:
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46       install_t
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48       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.
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BOOLEANS

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.
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62       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.
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67       setsebool -P deny_execmem 1
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71       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.
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75       setsebool -P deny_ptrace 1
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79       If you want to allow all domains to execute in fips_mode, you must turn
80       on the fips_mode boolean. Enabled by default.
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82       setsebool -P fips_mode 1
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86       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.
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90       setsebool -P mmap_low_allowed 1
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94       If you want to disable kernel module loading,  you  must  turn  on  the
95       secure_mode_insmod boolean. Enabled by default.
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97       setsebool -P secure_mode_insmod 1
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101       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.
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107       setsebool -P selinuxuser_execheap 1
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111       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.
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117       setsebool -P selinuxuser_execstack 1
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MANAGED FILES

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.
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126       file_type
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128            all files on the system
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FILE CONTEXTS

132       SELinux requires files to have an extended attribute to define the file
133       type.
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135       You can see the context of a file using the -Z option to ls
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137       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.
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141       The following file types are defined for install:
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145       install_exec_t
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147       - Set files with the install_exec_t type, if you want to transition  an
148       executable to the install_t domain.
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151       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
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157       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.
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COMMANDS

164       semanage fcontext can also be used to manipulate default  file  context
165       mappings.
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167       semanage  permissive  can  also  be used to manipulate whether or not a
168       process type is permissive.
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170       semanage module can also be used to enable/disable/install/remove  pol‐
171       icy modules.
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173       semanage boolean can also be used to manipulate the booleans
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176       system-config-selinux is a GUI tool available to customize SELinux pol‐
177       icy settings.
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AUTHOR

181       This manual page was auto-generated using sepolicy manpage .
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