Comment by bell-cot
5 hours ago
True-ish? If your firewall's admin page is internet-accessible, you have no excuse for not doing "bolted to bedrock" lockdowns of your web server config and your PHP config. Either of which could have blocked exploitation of the PHP vuln.
What's the right level of lockdown? Starting a page with "if not authorized, return 403" would've seemed adequate before this.
I'd suggest reading https://github.com/php/php-src/blob/master/php.ini-productio..., then doing a web search for "editing php.ini for maximum security".
Maybe compare with https://github.com/php/php-src/blob/master/php.ini-developme..., too.
Then similar for your web server (Apache, nginx, whatever).
EDIT: About your "would've seemed adequate before this" - I dug up a copy of a PHP v5.2 php.ini file (2-ish decades ago). That file begins thus:
Zero of these recommendations have anything to do with the present vulnerability.