The server has just executed the id command. The attacker now has Remote Code Execution (RCE).
nmap -p443 --script http-vuln-cve2017-9841 target.com vendor phpunit phpunit src util php eval-stdin.php exploit
rm -f vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php The server has just executed the id command
The impact is severe. Successful exploitation grants the attacker the ability to execute arbitrary code with the privileges of the web server user (often www-data or apache ). This can lead to: Successful exploitation grants the attacker the ability to
The root cause is deploying composer with the --dev flag or not using --no-dev in production. Many developers run composer install (which installs everything) on a live server. PHPUnit, being a require-dev dependency by default, ends up in the public web root.
Maya traced the infection path. The attacker uploaded a web shell, then moved laterally through an old NFS mount. They didn't touch production—yet. But they had credentials. Database dumps. API keys for the sandbox environment.