httpd_sys_script_selinux(8) - Linux man page

Name

httpd_sys_script_selinux - Security Enhanced Linux Policy for the httpd_sys_script processes

Description

Security-Enhanced Linux secures the httpd_sys_script processes via flexible mandatory access control.

The httpd_sys_script processes execute with the httpd_sys_script_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier.

For example:

ps -eZ | grep httpd_sys_script_t

Entrypoints

The httpd_sys_script_t SELinux type can be entered via the "shell_exec_t,httpd_sys_script_exec_t,httpd_sys_content_t,cifs_t,nfs_t,httpd_sys_script_exec_t,httpd_sys_content_t,httpdcontent" file types. The default entrypoint paths for the httpd_sys_script_t domain are the following:"

/bin/d?ash, /bin/zsh.*, /bin/ksh.*, /bin/yash, /bin/mksh, /bin/sash, /bin/tcsh, /bin/bash, /bin/fish, /bin/bash2, /usr/bin/fish, /sbin/nologin, /usr/sbin/sesh, /usr/sbin/smrsh, /usr/bin/scponly, /usr/libexec/sesh, /usr/sbin/scponlyc, /usr/bin/git-shell, /usr/libexec/git-core/git-shell, /var/www/[^/]*/cgi-bin(/.*)?, /var/www/perl(/.*)?, /var/www/html/[^/]*/cgi-bin(/.*)?, /usr/lib/cgi-bin(/.*)?, /var/www/cgi-bin(/.*)?, /var/www/svn/hooks(/.*)?, /usr/share/wordpress/.*.php, /usr/share/wordpress/wp-includes/.*.php, /usr/share/mythtv/mythweather/scripts(/.*)?, /usr/share/mythweb/mythweb.pl, /usr/share/wordpress-mu/wp-config.php, /srv/([^/]*/)?www(/.*)?, /var/www(/.*)?, /etc/htdig(/.*)?, /srv/gallery2(/.*)?, /var/lib/trac(/.*)?, /var/lib/htdig(/.*)?, /var/www/icons(/.*)?, /usr/share/htdig(/.*)?, /usr/share/drupal.*, /var/www/svn/conf(/.*)?, /usr/share/icecast(/.*)?, /usr/share/mythweb(/.*)?, /var/lib/cacti/rra(/.*)?, /usr/share/ntop/html(/.*)?, /var/lib/graphite-web(/.*), /usr/share/mythtv/data(/.*)?, /usr/share/openca/htdocs(/.*)?, /usr/share/selinux-policy[^/]*/html(/.*)?, /var/www/[^/]*/cgi-bin(/.*)?, /var/www/perl(/.*)?, /var/www/html/[^/]*/cgi-bin(/.*)?, /usr/lib/cgi-bin(/.*)?, /var/www/cgi-bin(/.*)?, /var/www/svn/hooks(/.*)?, /usr/share/wordpress/.*.php, /usr/share/wordpress/wp-includes/.*.php, /usr/share/mythtv/mythweather/scripts(/.*)?, /usr/share/mythweb/mythweb.pl, /usr/share/wordpress-mu/wp-config.php, /srv/([^/]*/)?www(/.*)?, /var/www(/.*)?, /etc/htdig(/.*)?, /srv/gallery2(/.*)?, /var/lib/trac(/.*)?, /var/lib/htdig(/.*)?, /var/www/icons(/.*)?, /usr/share/htdig(/.*)?, /usr/share/drupal.*, /var/www/svn/conf(/.*)?, /usr/share/icecast(/.*)?, /usr/share/mythweb(/.*)?, /var/lib/cacti/rra(/.*)?, /usr/share/ntop/html(/.*)?, /var/lib/graphite-web(/.*), /usr/share/mythtv/data(/.*)?, /usr/share/openca/htdocs(/.*)?, /usr/share/selinux-policy[^/]*/html(/.*)?

Process Types

SELinux defines process types (domains) for each process running on the system

You can see the context of a process using the -Z option to ps

Policy governs the access confined processes have to files. SELinux httpd_sys_script policy is very flexible allowing users to setup their httpd_sys_script processes in as secure a method as possible.

The following process types are defined for httpd_sys_script:

httpd_sys_script_t

Note: semanage permissive -a httpd_sys_script_t

can be used to make the process type httpd_sys_script_t permissive. Permissive process types are not denied access by SELinux. AVC messages will still be generated.

Booleans

SELinux policy is customizable based on least access required. httpd_sys_script policy is extremely flexible and has several booleans that allow you to manipulate the policy and run httpd_sys_script with the tightest access possible.

If you want to allow apache scripts to write to public content. Directories/Files must be labeled public_rw_content_t, you must turn on the allow_httpd_sys_script_anon_write boolean.

setsebool -P allow_httpd_sys_script_anon_write 1

Sharing Files

If you want to share files with multiple domains (Apache, FTP, rsync, Samba), you can set a file context of public_content_t and public_content_rw_t. These context allow any of the above domains to read the content. If you want a particular domain to write to the public_content_rw_t domain, you must set the appropriate boolean.

Allow httpd_sys_script servers to read the /var/httpd_sys_script directory by adding the public_content_t file type to the directory and by restoring the file type.
semanage fcontext -a -t public_content_t "/var/httpd_sys_script(/.*)?" restorecon -F -R -v /var/httpd_sys_script
Allow httpd_sys_script servers to read and write /var/tmp/incoming by adding the public_content_rw_t type to the directory and by restoring the file type. This also requires the allow_httpd_sys_scriptd_anon_write boolean to be set.
semanage fcontext -a -t public_content_rw_t "/var/httpd_sys_script/incoming(/.*)?"
restorecon -F -R -v /var/httpd_sys_script/incoming
If you want to allow apache scripts to write to public content. Directories/Files must be labeled public_rw_content_t., you must turn on the allow_httpd_sys_script_anon_write boolean.
setsebool -P allow_httpd_sys_script_anon_write 1

File Contexts

SELinux requires files to have an extended attribute to define the file type.

You can see the context of a file using the -Z option to ls

Policy governs the access confined processes have to these files. SELinux httpd_sys_script policy is very flexible allowing users to setup their httpd_sys_script processes in as secure a method as possible.

The following file types are defined for httpd_sys_script:

httpd_sys_script_exec_t

- Set files with the httpd_sys_script_exec_t type, if you want to transition an executable to the httpd_sys_script_t domain.

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.

Managed Files

The SELinux process type httpd_sys_script_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.

httpd_sys_rw_content_t

/etc/drupal.*

/var/lib/svn(/.*)?

/var/www/svn(/.*)?

/etc/dokuwiki(/.*)?

/var/lib/koji(/.*)?

/etc/mock/koji(/.*)?

/var/www/html/[^/]*/sites/default/files(/.*)?

/var/www/html/[^/]*/sites/default/settings.php

/var/lib/drupal.*

/etc/zabbix/web(/.*)?

/var/log/z-push(/.*)?

/var/spool/gosa(/.*)?

/var/spool/viewvc(/.*)?

/var/www/moodledata(/.*)?

/var/www/gallery/albums(/.*)?

/usr/share/wordpress-mu/wp-content(/.*)?

/usr/share/wordpress/wp-content/uploads(/.*)?

/usr/share/wordpress/wp-content/upgrade(/.*)?

/var/www/html/configuration.php

httpd_tmp_t
httpdcontent
initrc_tmp_t
mnt_t

/mnt(/[^/]*)

/mnt(/[^/]*)?

/rhev(/[^/]*)?

/media(/[^/]*)

/media(/[^/]*)?

/etc/rhgb(/.*)?

/media/.hal-.*

/net

/afs

/misc

/rhev

tmp_t

/tmp

/usr/tmp

/var/tmp

/var/tmp/vi.recover

Commands

semanage fcontext can also be used to manipulate default file context mappings.

semanage permissive can also be used to manipulate whether or not a process type is permissive.

semanage module can also be used to enable/disable/install/remove policy modules.

semanage boolean can also be used to manipulate the booleans

system-config-selinux is a GUI tool available to customize SELinux policy settings.

Author

This manual page was auto-generated using sepolicy manpage by mgrepl.