If you’re running any PHP based website on NGINX server and have PHP-FPM feature enabled for better performance, then beware of a newly disclosed vulnerability that could allow unauthorized attackers to hack your website server remotely.
The vulnerability, tracked as CVE-2019-11043, affects websites with certain configurations of PHP-FPM that is reportedly not uncommon in the wild and could be exploited easily as a proof-of-concept (PoC) exploit for the flaw has already been released publicly.
PHP-FPM is an alternative PHP FastCGI implementation that offers advanced and highly-efficient processing for scripts written in PHP programming language.
The main vulnerability is an “env_path_info” underflow memory corruption issue in the PHP-FPM module, and chaining it together with other issues could allow attackers to remotely execute arbitrary code on vulnerable web servers.
The vulnerability was spotted by Andrew Danau, a security researcher at Wallarm while hunting for bugs in a Capture The Flag competition, which was then weaponized by two of his fellow researchers, Omar Ganiev and Emil Lerner, to develop a fully working remote code execution exploit.
Which PHP-based websites are…
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