thumb_selinux(8)

1thumb_selinux(8)             SELinux Policy thumb             thumb_selinux(8)
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NAME

6       thumb_selinux - Security Enhanced Linux Policy for the thumb processes
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DESCRIPTION

9       Security-Enhanced Linux secures the thumb processes via flexible manda‐
10       tory access control.
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12       The thumb processes execute with the  thumb_t  SELinux  type.  You  can
13       check  if  you have these processes running by executing the ps command
14       with the -Z qualifier.
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16       For example:
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18       ps -eZ | grep thumb_t
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ENTRYPOINTS

23       The thumb_t SELinux type can be entered via the thumb_exec_t file type.
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25       The default entrypoint paths for the thumb_t domain are the following:
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27       /usr/bin/[^/]*thumbnailer,      /usr/bin/gnome-[^/]*-thumbnailer(.sh)?,
28       /usr/lib/tumbler-?[^/]*/tumblerd,             /usr/bin/raw-thumbnailer,
29       /usr/bin/ffmpegthumbnailer,                 /usr/bin/whaaw-thumbnailer,
30       /usr/bin/evince-thumbnailer,              /usr/bin/mate-thumbnail-font,
31       /usr/bin/gnome-thumbnail-font,         /usr/bin/gsf-office-thumbnailer,
32       /usr/bin/totem-video-thumbnailer, /usr/bin/shotwell-video-thumbnailer
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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       thumb  policy is very flexible allowing users to setup their thumb pro‐
42       cesses in as secure a method as possible.
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44       The following process types are defined for thumb:
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46       thumb_t
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48       Note: semanage permissive -a thumb_t can be used to  make  the  process
49       type  thumb_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.  thumb
56       policy is extremely flexible and has several booleans that allow you to
57       manipulate the policy and run thumb with the tightest access possible.
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61       If you want to deny user domains applications to map a memory region as
62       both executable and writable, this  is  dangerous  and  the  executable
63       should be reported in bugzilla, you must turn on the deny_execmem bool‐
64       ean. Disabled by default.
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66       setsebool -P deny_execmem 1
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70       If you want to allow system to run with  NIS,  you  must  turn  on  the
71       nis_enabled boolean. Disabled by default.
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73       setsebool -P nis_enabled 1
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77       If  you  want  to allow all unconfined executables to use libraries re‐
78       quiring text relocation that are not labeled textrel_shlib_t, you  must
79       turn on the selinuxuser_execmod boolean. Enabled by default.
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81       setsebool -P selinuxuser_execmod 1
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MANAGED FILES

86       The SELinux process type thumb_t can manage files labeled with the fol‐
87       lowing file types.  The paths listed are the default  paths  for  these
88       file types.  Note the processes UID still need to have DAC permissions.
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90       cifs_t
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93       ecryptfs_t
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95            /home/[^/]+/.Private(/.*)?
96            /home/[^/]+/.ecryptfs(/.*)?
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98       fusefs_t
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100            /var/run/user/[0-9]+/gvfs
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102       nfs_t
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FILE CONTEXTS

107       SELinux requires files to have an extended attribute to define the file
108       type.
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110       You can see the context of a file using the -Z option to ls
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112       Policy governs the access  confined  processes  have  to  these  files.
113       SELinux  thumb  policy  is  very flexible allowing users to setup their
114       thumb processes in as secure a method as possible.
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116       STANDARD FILE CONTEXT
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118       SELinux defines the file context types for the thumb, if you wanted  to
119       store  files with these types in a different paths, you need to execute
120       the semanage command to specify alternate labeling  and  then  use  re‐
121       storecon to put the labels on disk.
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123       semanage fcontext -a -t thumb_exec_t '/srv/thumb/content(/.*)?'
124       restorecon -R -v /srv/mythumb_content
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126       Note:  SELinux  often  uses  regular expressions to specify labels that
127       match multiple files.
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129       The following file types are defined for thumb:
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133       thumb_exec_t
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135       - Set files with the thumb_exec_t type, if you want  to  transition  an
136       executable to the thumb_t domain.
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139       Paths:
140            /usr/bin/[^/]*thumbnailer, /usr/bin/gnome-[^/]*-thumbnailer(.sh)?,
141            /usr/lib/tumbler-?[^/]*/tumblerd,        /usr/bin/raw-thumbnailer,
142            /usr/bin/ffmpegthumbnailer,            /usr/bin/whaaw-thumbnailer,
143            /usr/bin/evince-thumbnailer,         /usr/bin/mate-thumbnail-font,
144            /usr/bin/gnome-thumbnail-font,    /usr/bin/gsf-office-thumbnailer,
145            /usr/bin/totem-video-thumbnailer,   /usr/bin/shotwell-video-thumb‐
146            nailer
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148
149       thumb_home_t
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151       -  Set  files  with  the  thumb_home_t type, if you want to store thumb
152       files in the users home directory.
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155       Paths:
156            /home/[^/]+/.thumbnails(/.*)?,         /home/[^/]+/missfont.log.*,
157            /home/[^/]+/.cache/thumbnails(/.*)?
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159
160       thumb_tmp_t
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162       -  Set files with the thumb_tmp_t type, if you want to store thumb tem‐
163       porary files in the /tmp directories.
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167       thumb_tmpfs_t
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169       - Set files with the thumb_tmpfs_t type, if you  want  to  store  thumb
170       files on a tmpfs file system.
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174       Note:  File context can be temporarily modified with the chcon command.
175       If you want to permanently change the file context you need to use  the
176       semanage fcontext command.  This will modify the SELinux labeling data‐
177       base.  You will need to use restorecon to apply the labels.
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COMMANDS

181       semanage fcontext can also be used to manipulate default  file  context
182       mappings.
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184       semanage  permissive  can  also  be used to manipulate whether or not a
185       process type is permissive.
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187       semanage module can also be used to enable/disable/install/remove  pol‐
188       icy modules.
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190       semanage boolean can also be used to manipulate the booleans
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193       system-config-selinux is a GUI tool available to customize SELinux pol‐
194       icy settings.
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AUTHOR

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