Vendor Phpunit Phpunit Src Util Php Eval-stdin.php Cve <FREE ›>

The critical oversight: No authentication, no IP whitelisting, no php_sapi_name() check to ensure it runs via CLI. When exposed to a web server, it transforms into an unrestricted RCE gadget.

The combination of php://input (which reads raw data from an HTTP POST request body) and the dangerous eval() function created an unintended code execution pipeline. When an external attacker sends an HTTP POST request directly to the URI where this file resides, the server parses the request body as executable PHP code. The Attack Vector

CVE-2017-9841 is a vulnerability that allows remote, unauthenticated attackers to execute arbitrary PHP code on a server. The Root Cause

Marta imagined sunlight turned to static as she traced the call tree. A misconfigured autoloader, an outdated dependency, and a forgotten symlink had been folding the util/ folder into the distribution packaging. The package manager didn’t lie — it shipped the file. The production server accepted requests for the hidden bin. Someone with a single HTTP POST could whisper PHP into the server’s ear and the server would sing back results under the user’s privileges. vendor phpunit phpunit src util php eval-stdin.php cve

: If your project does not require certain features of PHPUnit or other utilities that could introduce risks, disable or remove them.

Because many modern PHP applications use Composer to manage dependencies, the vendor folder is often deployed to the web root. If the web server is misconfigured to allow public access to the /vendor directory, the vulnerability becomes remotely exploitable. The Attack Vector

vendor/phpunit/phpunit src/util/php/eval-stdin.php When an external attacker sends an HTTP POST

[Attacker Terminal] │ ▼ (HTTP POST with malicious PHP payload) [Internet / Web Server Root] │ ▼ (Misconfigured Public Access) /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php │ ▼ (Executes payload via eval() and php://input) [Full Underlying Server Compromise] 1. Shipping Development Tools to Production CVE-2017-9841 Detail - NVD

Many developers leave the vendor folder exposed to the public through improper web server configurations (e.g., pointing the document root to the project root instead of the /public folder).

Ironically, eval-stdin.php was not designed as a backdoor. It was a for PHPUnit’s own internal process isolation. When running tests that call exec() or external processes, PHPUnit used this script to evaluate small snippets of PHP code passed via standard input. The developer intended to use it exclusively from the command line. A misconfigured autoloader, an outdated dependency, and a

Stay vigilant. Scan your dependencies. And never, ever leave PHPUnit in your webroot.

Critical (CVSS 9.8) Affected versions: PHPUnit ≤ 4.8.28 and ≤ 5.6.3 Fixed in: PHPUnit 4.8.28, 5.6.3, and later

POST /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1 Host: target-vulnerable-server.com Content-Type: application/x-www-form-urlencoded Content-Length: 19 Use code with caution. The Execution Lifecycle