Allow Wordpress upgrades with SELinux in EL8 with nginx/php-fpm
I'm trying to allow the use of Wordpress upgrades (not plugin updates) directly on the web interface.
I already have SELinux working for everything except this feature. When trying to nail down what should be allowed I'm unable to exactly find what need to be changed instead of relabeling the entire /path/to/wordpress/directory
to unconfined_u:object_r:httpd_sys_rw_content_t:s0
Here's whats happening when I try to upgrade via the web inteface:
==> /var/log/nginx/kosen.energy.access.log <==
172.21.1.28 - - [22/Jul/2021:14:21:27 -0300] "POST /wp-cron.php?doing_wp_cron=1626974487.4410700798034667968750 HTTP/1.0" 200 0 "https://kosen.energy/wp-cron.php?doing_wp_cron=1626974487.4410700798034667968750" "WordPress/5.7.2; https://kosen.energy"
172.21.1.28 - - [22/Jul/2021:14:21:29 -0300] "GET /wp-admin/update-core.php HTTP/1.0" 200 155053 "https://kosen.energy/wp-admin/update-core.php?action=do-core-upgrade" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.1 Safari/605.1.15"
==> /var/log/audit/audit.log <== type=AVC msg=audit(1626974498.501:10696): avc: denied { write } for pid=9658 comm="php-fpm" name="update-core.php" dev="dm-0" ino=101266980 scontext=system_u:system_r:httpd_t:s0 tcontext=unconfined_u:object_r:httpd_sys_content_t:s0 tclass=file permissive=0
==> /var/log/nginx/error.log <== 2021/07/22 14:21:38 [error] 9646#0: *38349 FastCGI sent in stderr: "PHP message: PHP Warning: copy(/var/www/html/kosen.energy/wp-admin/includes/update-core.php): failed to open stream: Permission denied in /var/www/html/kosen.energy/wp-admin/includes/class-wp-filesystem-direct.php on line 309" while reading upstream, client: 172.21.1.28, server: _, request: "POST /wp-admin/update-core.php?action=do-core-upgrade HTTP/1.0", upstream: "fastcgi://unix:/run/php-fpm/www.sock:", host: "kosen.energy", referrer: "https://kosen.energy/wp-admin/update-core.php"
==> /var/log/nginx/kosen.energy.access.log <==
172.21.1.28 - - [22/Jul/2021:14:21:38 -0300] "POST /wp-admin/update-core.php?action=do-core-upgrade HTTP/1.0" 200 150059 "https://kosen.energy/wp-admin/update-core.php" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.1 Safari/605.1.15"
On wp-config.conf
I already have FS_METHOD
as direct
:
/** Enable proper support for updates without FTP/FTPS. */
define('FS_METHOD', 'direct');
php-fpm
is already running as the nginx
user:
[root@kosen kosen.energy]# grep user /etc/php-fpm.d/www.conf | grep -v \;
user = nginx
listen.acl_users = apache,nginx
Additional info:
[root@kosen kosen.energy]# rpm -qa | egrep "php-fpm|nginx"
nginx-mod-http-xslt-filter-1.14.1-9.0.1.module+el8.0.0+5347+9282027e.x86_64
nginx-mod-http-image-filter-1.14.1-9.0.1.module+el8.0.0+5347+9282027e.x86_64
nginx-mod-http-perl-1.14.1-9.0.1.module+el8.0.0+5347+9282027e.x86_64
nginx-mod-mail-1.14.1-9.0.1.module+el8.0.0+5347+9282027e.x86_64
nginx-1.14.1-9.0.1.module+el8.0.0+5347+9282027e.x86_64
nginx-all-modules-1.14.1-9.0.1.module+el8.0.0+5347+9282027e.noarch
nginx-filesystem-1.14.1-9.0.1.module+el8.0.0+5347+9282027e.noarch
nginx-mod-stream-1.14.1-9.0.1.module+el8.0.0+5347+9282027e.x86_64
php-fpm-7.4.6-4.module+el8.3.0+7685+72d70b58.x86_64
Thanks.
All of WordPress files would have to be writable in order to use the upgrade function from the admin web page. I do not do this; I use wp
command to upgrade WordPress directly on the server.
wp core update
wp core update-db