Check the following:
The wrapper php://input reads raw data from the body of an incoming HTTP request. When this file is accidentally exposed to the internet via an unconfigured web root, anyone can send an HTTP POST request containing arbitrary PHP code. The eval() language construct executes that code immediately, granting the sender unauthenticated control over the host environment.
: A highly dangerous PHP language construct that executes any string passed to it as active PHP code.
The Snyk CVSS score for CVE‑2017‑9841 is , with the attack vector listed as “Network,” attack complexity “Low,” and privileges required “None”. In other words, an unauthenticated remote attacker can take over your server with a single crafted POST request.
This file was designed to facilitate CLI-based test executions by reading code directly from standard input ( stdin ). The core component of this file contains a highly dangerous construction: eval('?>' . file_get_contents('php://input')); Use code with caution. The Mechanism of CVE-2017-9841 index of vendor phpunit phpunit src util php evalstdinphp
curl -X POST --data "<?php system('id'); ?>" http://example.com/vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php
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Because this file was intended only for internal command-line interactions during testing routines, it . The Exploit Mechanism
(for on-demand testing), move it outside the public web root (e.g., to /usr/local/phpunit or a directory not served by your web server). Check the following: The wrapper php://input reads raw
Understanding the Security Risks of "index of vendor/phpunit/phpunit/src/util/php/eval-stdin.php"
<?php echo "test123"; ?>
Add Options -Indexes to your .htaccess file or your main server configuration.
eval-stdin.php is a script that was part of the PHPUnit testing framework (specifically versions prior to 4.8.28 and 5.6.3). Its original purpose was to allow the framework to receive and execute PHP code passed through standard input ( stdin ). The Vulnerability: CVE-2017-9841 : A highly dangerous PHP language construct that
/index of vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php
The vulnerability occurs when a production website exposes its dependency directory (usually managed via Composer) to the web root. The Attack Vector
Older applications, or those that haven't been updated in years, still run the vulnerable PHPUnit versions (prior to 4.8.28 or 5.6.3).
In vulnerable iterations of PHPUnit (all versions prior to and 5.x prior to 5.6.3 ), the eval-stdin.php file contained a fundamentally insecure method for parsing data. The file utilized the following structural logic: eval('?>' . file_get_contents('php://input')); Use code with caution. How Exploitation Works