sandbox_selinux(8)

1sandbox_selinux(8)          SELinux Policy sandbox          sandbox_selinux(8)
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NAME

6       sandbox_selinux  -  Security Enhanced Linux Policy for the sandbox pro‐
7       cesses
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DESCRIPTION

10       Security-Enhanced Linux secures  the  sandbox  processes  via  flexible
11       mandatory access control.
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13       The  sandbox processes execute with the sandbox_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 sandbox_t
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PROCESS TYPES

24       SELinux defines process types (domains) for each process running on the
25       system
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27       You can see the context of a process using the -Z option to ps
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29       Policy governs the access confined processes have  to  files.   SELinux
30       sandbox  policy  is very flexible allowing users to setup their sandbox
31       processes in as secure a method as possible.
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33       The following process types are defined for sandbox:
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35       sandbox_t, sandbox_xserver_t, sandbox_min_t, sandbox_min_client_t, sandbox_x_t, sandbox_x_client_t, sandbox_web_t, sandbox_web_client_t, sandbox_net_t, sandbox_net_client_t
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37       Note: semanage permissive -a sandbox_t can be used to make the  process
38       type  sandbox_t  permissive. SELinux does not deny access to permissive
39       process types, but the AVC (SELinux denials) messages are still  gener‐
40       ated.
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MCS Constrained

44       The  SELinux process type sandbox_t is an MCS (Multi Category Security)
45       constrained type.  Sometimes this separation is referred to  as  sVirt.
46       These  types  are  usually used for securing multi-tenant environments,
47       such as virtualization, containers or separation of users.   The  tools
48       used  to  launch  MCS  types,  pick  out a different MCS label for each
49       process group.
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51       For example one process might be launched with sandbox_t:s0:c1,c2,  and
52       another  process  launched  with sandbox_t:s0:c3,c4. The SELinux kernel
53       only allows these processes can only write to content with  a  matching
54       MCS  label,  or a MCS Label of s0. A process running with the MCS level
55       of s0:c1,c2 is not allowed to write to content with the  MCS  label  of
56       s0:c3,c4
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BOOLEANS

60       SELinux policy is customizable based on least access required.  sandbox
61       policy is extremely flexible and has several booleans that allow you to
62       manipulate  the  policy and run sandbox with the tightest access possi‐
63       ble.
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67       If you want to deny user domains applications to map a memory region as
68       both  executable  and  writable,  this  is dangerous and the executable
69       should be reported in bugzilla, you must turn on the deny_execmem bool‐
70       ean. Enabled by default.
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72       setsebool -P deny_execmem 1
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FILE CONTEXTS

77       SELinux requires files to have an extended attribute to define the file
78       type.
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80       You can see the context of a file using the -Z option to ls
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82       Policy governs the access  confined  processes  have  to  these  files.
83       SELinux  sandbox  policy is very flexible allowing users to setup their
84       sandbox processes in as secure a method as possible.
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86       STANDARD FILE CONTEXT
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88       SELinux defines the file context types for the sandbox, if  you  wanted
89       to store files with these types in a diffent paths, you need to execute
90       the semanage command  to  sepecify  alternate  labeling  and  then  use
91       restorecon to put the labels on disk.
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93       semanage  fcontext  -a  -t sandbox_xserver_tmpfs_t '/srv/mysandbox_con‐
94       tent(/.*)?'
95       restorecon -R -v /srv/mysandbox_content
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97       Note: SELinux often uses regular expressions  to  specify  labels  that
98       match multiple files.
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100       The following file types are defined for sandbox:
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104       sandbox_devpts_t
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106       -  Set  files  with the sandbox_devpts_t type, if you want to treat the
107       files as sandbox devpts data.
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111       sandbox_exec_t
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113       - Set files with the sandbox_exec_t type, if you want to transition  an
114       executable to the sandbox_t domain.
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118       sandbox_file_t
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120       -  Set  files  with  the  sandbox_file_t type, if you want to treat the
121       files as sandbox content.
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125       sandbox_min_client_tmpfs_t
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127       - Set files with the sandbox_min_client_tmpfs_t type, if  you  want  to
128       store sandbox min client files on a tmpfs file system.
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132       sandbox_net_client_tmpfs_t
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134       -  Set  files  with the sandbox_net_client_tmpfs_t type, if you want to
135       store sandbox net client files on a tmpfs file system.
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139       sandbox_web_client_tmpfs_t
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141       - Set files with the sandbox_web_client_tmpfs_t type, if  you  want  to
142       store sandbox web client files on a tmpfs file system.
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146       sandbox_x_client_tmpfs_t
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148       -  Set  files  with  the  sandbox_x_client_tmpfs_t type, if you want to
149       store sandbox x client files on a tmpfs file system.
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153       sandbox_xserver_tmpfs_t
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155       - Set files with the sandbox_xserver_tmpfs_t type, if you want to store
156       sandbox xserver files on a tmpfs file system.
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160       Note:  File context can be temporarily modified with the chcon command.
161       If you want to permanently change the file context you need to use  the
162       semanage fcontext command.  This will modify the SELinux labeling data‐
163       base.  You will need to use restorecon to apply the labels.
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COMMANDS

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

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