Security-Enhanced Linux secures the thumb processes via flexible mandatory access control.
If you want to allow users to resolve user passwd entries directly from ldap rather then using a sssd serve for the thumb_t, you must turn on the authlogin_nsswitch_use_ldap boolean.
setsebool -P authlogin_nsswitch_use_ldap 1
If you want to allow confined applications to run with kerberos for the thumb_t, you must turn on the kerberos_enabled boolean.
setsebool -P kerberos_enabled 1
You can see the context of a file using the -Z option to lsP Policy governs the access confined processes have to these files. SELinux thumb policy is very flexible allowing users to setup their thumb processes in as secure a method as possible.
The following file types are defined for thumb:
thumb_exec_t
- Set files with the thumb_exec_t type, if you want to transition an executable to the thumb_t domain.
thumb_home_t
- Set files with the thumb_home_t type, if you want to store thumb files in the users home directory.
thumb_tmp_t
- Set files with the thumb_tmp_t type, if you want to store thumb temporary files in the /tmp directories.
thumb_tmpfs_t
- Set files with the thumb_tmpfs_t type, if you want to store thumb files on a tmpfs file system.
Note: File context can be temporarily modified with the chcon command. If you want to permanently change the file context you need to use the semanage fcontext command. This will modify the SELinux labeling database. You will need to use restorecon to apply the labels.
You can see the context of a process using the -Z option to psP Policy governs the access confined processes have to files. SELinux thumb policy is very flexible allowing users to setup their thumb processes in as secure a method as possible.
The following process types are defined for thumb:
thumb_t
Note: semanage permissive -a PROCESS_TYPE can be used to make a process type permissive. Permissive process types are not denied access by SELinux. AVC messages will still be generated.
The SELinux user type thumb_t can manage files labeled with the following file types. The paths listed are the default paths for these file types. Note the processes UID still need to have DAC permissions.
gstreamer_home_t
/var/run/user/[^/]*/.orc(/.*)?
/root/.gstreamer-.*
/home/[^/]*/.orc(/.*)?
/home/[^/]*/.gstreamer-.*
/home/[^/]*/.grl-bookmarks
/home/[^/]*/.grl-bookmarks
/home/[^/]*/.grl-metadata-store
thumb_home_t
/home/[^/]*/.thumbnails(/.*)?
/home/[^/]*/missfont.log.*
/home/[^/]*/.cache/thumbnails(/.*)?
thumb_tmp_t
thumb_tmpfs_t
user_fonts_cache_t
/root/.fontconfig(/.*)?
/root/.fonts/auto(/.*)?
/root/.fonts.cache-.*
/home/[^/]*/.fontconfig(/.*)?
/home/[^/]*/.fonts/auto(/.*)?
/home/[^/]*/.fonts.cache-.*
user_tmp_t
/var/run/user(/.*)?
/tmp/gconfd-.*
semanage permissive can also be used to manipulate whether or not a proce