Index Of Vendor Phpunit Phpunit Src Util Php Evalstdinphp Work ((hot)) -

They can send arbitrary PHP code via POST or query parameters if the script is misconfigured to read from php://input instead of php://stdin (some outdated forks do this).

Attackers use specialized search queries to find exposed directories indexed by search engines. A search query like intitle:"Index of" "vendor/phpunit" allows malicious actors to find vulnerable websites without even running a port scanner. How to Check If Your Server Is Vulnerable 1. Check for File Existence

Attackers can run arbitrary commands to install malware, backdoors, or web shells. They can send arbitrary PHP code via POST

"I want to ensure that even if our web server directory index exposes vendor/phpunit , external users cannot execute arbitrary PHP code through eval-stdin.php , so that our infrastructure remains secure."

A typical automated attack payload targeting this vulnerability looks like this: How to Check If Your Server Is Vulnerable 1

php vendor/phpunit/phpunit/src/Util/eval-stdin.php <<'EOF' <?php $foo = 'bar'; echo strtoupper($foo); EOF

POST /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1 Host: vulnerable-website.com Content-Type: text/plain Content-Length: 32 Use code with caution. The Persistent Threat of PHPUnit’s eval-stdin

The Persistent Threat of PHPUnit’s eval-stdin.php (CVE-2017-9841)

// Trim BOM and whitespace $stdin = preg_replace('/^\xEF\xBB\xBF/', '', $stdin); $stdin = trim($stdin);

Check your web server access logs for POST requests hitting the eval-stdin.php path.