NAME¶

webadm_r - Web administrator role - Security Enhanced Linux Policy

DESCRIPTION¶

SELinux supports Roles Based Access Control (RBAC), some Linux roles are login roles, while other roles need to be transition into.

Note: Examples in this man page will use the staff_u SELinux user.

Non login roles are usually used for administrative tasks. For example, tasks that require root privileges. Roles control which types a user can run processes with. Roles often have default types assigned to them.

The default type for the webadm_r role is webadm_t.

The newrole program to transition directly to this role.

newrole -r webadm_r -t webadm_t

sudo is the preferred method to do transition from one role to another. You setup sudo to transition to webadm_r by adding a similar line to the /etc/sudoers file.

USERNAME ALL=(ALL) ROLE=webadm_r TYPE=webadm_t COMMAND

sudo will run COMMAND as staff_u:webadm_r:webadm_t:LEVEL

When using a a non login role, you need to setup SELinux so that your SELinux user can reach webadm_r role.

Execute the following to see all of the assigned SELinux roles:

semanage user -l

You need to add webadm_r to the staff_u user. You could setup the staff_u user to be able to use the webadm_r role with a command like:

$ semanage user -m -R 'staff_r system_r webadm_r' staff_u

BOOLEANS¶

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

If you want to allow webadm to manage files in users home directories, you must turn on the webadm_manage_user_files boolean. Disabled by default.

setsebool -P webadm_manage_user_files 1

If you want to allow webadm to read files in users home directories, you must turn on the webadm_read_user_files boolean. Disabled by default.

setsebool -P webadm_read_user_files 1

If you want to allow direct login to the console device. Required for System 390, you must turn on the allow_console_login boolean. Enabled by default.

setsebool -P allow_console_login 1

If you want to allow all domains to use other domains file descriptors, you must turn on the allow_domain_fd_use boolean. Enabled by default.

setsebool -P allow_domain_fd_use 1

If you want to allow unconfined executables to map a memory region as both executable and writable, this is dangerous and the executable should be reported in bugzilla), you must turn on the allow_execmem boolean. Enabled by default.

setsebool -P allow_execmem 1

If you want to allow unconfined executables to make their stack executable. This should never, ever be necessary. Probably indicates a badly coded executable, but could indicate an attack. This executable should be reported in bugzilla), you must turn on the allow_execstack boolean. Enabled by default.

setsebool -P allow_execstack 1

If you want to allow confined applications to run with kerberos, you must turn on the allow_kerberos boolean. Enabled by default.

setsebool -P allow_kerberos 1

If you want to allow sysadm to debug or ptrace all processes, you must turn on the allow_ptrace boolean. Disabled by default.

setsebool -P allow_ptrace 1

If you want to allow system to run with NIS, you must turn on the allow_ypbind boolean. Disabled by default.

setsebool -P allow_ypbind 1

If you want to allow all domains to have the kernel load modules, you must turn on the domain_kernel_load_modules boolean. Disabled by default.

setsebool -P domain_kernel_load_modules 1

If you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. Enabled by default.

setsebool -P fips_mode 1

If you want to enable reading of urandom for all domains, you must turn on the global_ssp boolean. Disabled by default.

setsebool -P global_ssp 1

If you want to allow confined applications to use nscd shared memory, you must turn on the nscd_use_shm boolean. Enabled by default.

setsebool -P nscd_use_shm 1

If you want to enabling secure mode disallows programs, such as newrole, from transitioning to administrative user domains, you must turn on the secure_mode boolean. Disabled by default.

setsebool -P secure_mode 1

If you want to allow ssh logins as sysadm_r:sysadm_t, you must turn on the ssh_sysadm_login boolean. Disabled by default.

setsebool -P ssh_sysadm_login 1

If you want to allow xdm logins as sysadm, you must turn on the xdm_sysadm_login boolean. Disabled by default.

setsebool -P xdm_sysadm_login 1

MANAGED FILES¶

The SELinux process type webadm_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_config_t

/etc/httpd(/.*)?
/etc/nginx(/.*)?
/etc/apache(2)?(/.*)?
/etc/cherokee(/.*)?
/etc/lighttpd(/.*)?
/etc/apache-ssl(2)?(/.*)?
/var/lib/openshift/.httpd.d(/.*)?
/var/lib/stickshift/.httpd.d(/.*)?
/etc/vhosts
/etc/thttpd.conf

httpd_lock_t

httpd_log_t

/var/log/cacti(/.*)?
/var/log/httpd(/.*)?
/var/log/nginx(/.*)?
/var/log/apache(2)?(/.*)?
/var/log/php-fpm(/.*)?
/var/log/cherokee(/.*)?
/var/log/lighttpd(/.*)?
/var/log/thttpd.log.*
/var/log/apache-ssl(2)?(/.*)?
/var/log/cgiwrap.log.*
/var/www/stickshift/[^/]*/log(/.*)?
/var/log/roundcubemail(/.*)?
/var/lib/openshift/.log/httpd(/.*)?
/var/www/openshift/console/log(/.*)?
/etc/httpd/logs

httpd_modules_t

/usr/lib(64)?/httpd(/.*)?
/usr/lib(64)?/apache(/.*)?
/usr/lib(64)?/cherokee(/.*)?
/usr/lib(64)?/lighttpd(/.*)?
/usr/lib(64)?/apache2/modules(/.*)?
/etc/httpd/modules

httpd_php_tmp_t

httpd_script_exec_type

httpd_suexec_tmp_t

httpd_tmp_t

/var/www/openshift/console/tmp(/.*)?

httpd_var_run_t

/var/run/mod_.*
/var/run/wsgi.*
/var/run/httpd.*
/var/run/nginx.*
/var/run/apache.*
/var/run/php-fpm(/.*)?
/var/run/lighttpd(/.*)?
/var/lib/php/session(/.*)?
/var/run/thttpd.pid
/var/run/gcache_port

httpdcontent

initrc_tmp_t

mnt_t

/mnt(/[^/]*)
/mnt(/[^/]*)?
/rhev(/[^/]*)?
/media(/[^/]*)
/media(/[^/]*)?
/etc/rhgb(/.*)?
/media/.hal-.*
/net
/afs
/rhev
/misc

public_content_rw_t

/var/spool/abrt-upload(/.*)?

tmp_t

/tmp
/usr/tmp
/var/tmp
/tmp-inst
/var/tmp-inst
/var/tmp/vi.recover

user_home_t

/home/[^/]*/.+
/home/staff/.+

user_tmp_t

/tmp/gconfd-.*
/tmp/gconfd-staff

var_lock_t

/var/lock(/.*)?

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 .

SEE ALSO¶

selinux(8), webadm(8), semanage(8), restorecon(8), chcon(1) , setsebool(8)