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. Enabled by default.
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66       setsebool -P deny_execmem 1
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70       If you want to allow all domains to execute in fips_mode, you must turn
71       on the fips_mode boolean. Enabled by default.
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73       setsebool -P fips_mode 1
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77       If  you  want  to  allow  all  unconfined  executables to use libraries
78       requiring text relocation that are  not  labeled  textrel_shlib_t,  you
79       must turn on the selinuxuser_execmod boolean. Enabled by default.
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81       setsebool -P selinuxuser_execmod 1
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85       If  you  want  to  support  NFS  home directories, you must turn on the
86       use_nfs_home_dirs boolean. Disabled by default.
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88       setsebool -P use_nfs_home_dirs 1
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92       If you want to support SAMBA home directories, you  must  turn  on  the
93       use_samba_home_dirs boolean. Disabled by default.
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95       setsebool -P use_samba_home_dirs 1
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MANAGED FILES

100       The SELinux process type thumb_t can manage files labeled with the fol‐
101       lowing file types.  The paths listed are the default  paths  for  these
102       file types.  Note the processes UID still need to have DAC permissions.
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104       cifs_t
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106
107       ecryptfs_t
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109            /home/[^/]+/.Private(/.*)?
110            /home/[^/]+/.ecryptfs(/.*)?
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112       fusefs_t
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114            /var/run/user/[^/]*/gvfs
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116       gstreamer_home_t
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118            /var/run/user/[^/]*/.orc(/.*)?
119            /root/.gstreamer-.*
120            /root/.cache/gstreamer-.*
121            /home/[^/]+/.orc(/.*)?
122            /home/[^/]+/.gstreamer-.*
123            /home/[^/]+/.nv/GLCache(/.*)?
124            /home/[^/]+/.cache/GLCache(/.*)?
125            /home/[^/]+/.cache/gstreamer-.*
126            /home/[^/]+/.grl-bookmarks
127            /home/[^/]+/.grl-metadata-store
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129       nfs_t
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131
132       texlive_home_t
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134            /home/[^/]+/.texlive2012(/.*)?
135            /home/[^/]+/.texlive2013(/.*)?
136            /home/[^/]+/.texlive2014(/.*)?
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138       thumb_home_t
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140            /home/[^/]+/.thumbnails(/.*)?
141            /home/[^/]+/missfont.log.*
142            /home/[^/]+/.cache/thumbnails(/.*)?
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144       thumb_tmp_t
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146
147       thumb_tmpfs_t
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149
150       user_fonts_cache_t
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152            /root/.fontconfig(/.*)?
153            /root/.fonts/auto(/.*)?
154            /root/.fonts.cache-.*
155            /home/[^/]+/.fontconfig(/.*)?
156            /home/[^/]+/.fonts/auto(/.*)?
157            /home/[^/]+/.fonts.cache-.*
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159       user_tmp_t
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161            /dev/shm/mono.*
162            /var/run/user(/.*)?
163            /tmp/.ICE-unix(/.*)?
164            /tmp/.X11-unix(/.*)?
165            /dev/shm/pulse-shm.*
166            /tmp/.X0-lock
167            /tmp/hsperfdata_root
168            /var/tmp/hsperfdata_root
169            /home/[^/]+/tmp
170            /home/[^/]+/.tmp
171            /tmp/gconfd-[^/]+
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FILE CONTEXTS

175       SELinux requires files to have an extended attribute to define the file
176       type.
177
178       You can see the context of a file using the -Z option to ls
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180       Policy governs the access  confined  processes  have  to  these  files.
181       SELinux  thumb  policy  is  very flexible allowing users to setup their
182       thumb processes in as secure a method as possible.
183
184       STANDARD FILE CONTEXT
185
186       SELinux defines the file context types for the thumb, if you wanted  to
187       store  files  with  these types in a diffent paths, you need to execute
188       the semanage command  to  sepecify  alternate  labeling  and  then  use
189       restorecon to put the labels on disk.
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191       semanage fcontext -a -t thumb_tmpfs_t '/srv/mythumb_content(/.*)?'
192       restorecon -R -v /srv/mythumb_content
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194       Note:  SELinux  often  uses  regular expressions to specify labels that
195       match multiple files.
196
197       The following file types are defined for thumb:
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201       thumb_exec_t
202
203       - Set files with the thumb_exec_t type, if you want  to  transition  an
204       executable to the thumb_t domain.
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206
207       Paths:
208            /usr/bin/[^/]*thumbnailer, /usr/bin/gnome-[^/]*-thumbnailer(.sh)?,
209            /usr/lib/tumbler-?[^/]*/tumblerd,        /usr/bin/raw-thumbnailer,
210            /usr/bin/ffmpegthumbnailer,            /usr/bin/whaaw-thumbnailer,
211            /usr/bin/evince-thumbnailer,         /usr/bin/mate-thumbnail-font,
212            /usr/bin/gnome-thumbnail-font,    /usr/bin/gsf-office-thumbnailer,
213            /usr/bin/totem-video-thumbnailer,   /usr/bin/shotwell-video-thumb‐
214            nailer
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217       thumb_home_t
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219       -  Set  files  with  the  thumb_home_t type, if you want to store thumb
220       files in the users home directory.
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222
223       Paths:
224            /home/[^/]+/.thumbnails(/.*)?,         /home/[^/]+/missfont.log.*,
225            /home/[^/]+/.cache/thumbnails(/.*)?
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227
228       thumb_tmp_t
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230       -  Set files with the thumb_tmp_t type, if you want to store thumb tem‐
231       porary files in the /tmp directories.
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235       thumb_tmpfs_t
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237       - Set files with the thumb_tmpfs_t type, if you  want  to  store  thumb
238       files on a tmpfs file system.
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242       Note:  File context can be temporarily modified with the chcon command.
243       If you want to permanently change the file context you need to use  the
244       semanage fcontext command.  This will modify the SELinux labeling data‐
245       base.  You will need to use restorecon to apply the labels.
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COMMANDS

249       semanage fcontext can also be used to manipulate default  file  context
250       mappings.
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252       semanage  permissive  can  also  be used to manipulate whether or not a
253       process type is permissive.
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255       semanage module can also be used to enable/disable/install/remove  pol‐
256       icy modules.
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258       semanage boolean can also be used to manipulate the booleans
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260
261       system-config-selinux is a GUI tool available to customize SELinux pol‐
262       icy settings.
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AUTHOR

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