|
|
The eval-stdin.php script reads PHP code from STDIN, executes it, and then outputs the result. This allows PHPUnit to dynamically execute code during testing.
The flaw exists because this file does not verify who is sending the request or whether the framework is running in a secure testing environment [1, 2]. If the vendor directory is uploaded to a production server and remains web-accessible, anyone can send an HTTP POST request containing malicious PHP code directly to this file, forcing the server to execute it immediately [1, 2]. Anatomy of a Attack (The Google Dork)
When left publicly accessible, this component allows remote attackers to execute arbitrary code on the underlying web server. The Root Cause: CVE-2017-9841
Attackers automate the discovery of vulnerable servers by using search engine operators. A typical search string looks like this: intitle:"Index of /" "vendor/phpunit/phpunit/src/Util/PHP/"
You must configure your web server to block public HTTP requests to the vendor directory entirely. RedirectMatch 404 /(vendor|tests)/ Use code with caution. For Nginx ( nginx.conf ): location ~ /vendor/ deny all; return 404; Use code with caution. 4. Disable Directory Browsing The eval-stdin
When executed in a CLI environment, php://input behaves predictably.
When concatenated, the full query mimics what an attacker would type into a search engine (like Google or Shodan) to find live, exploitable instances of PHPUnit’s eval‑stdin.php file – especially where directory listing is enabled, making the file’s existence trivial to discover.
To understand the severity of this issue, it's crucial to first understand the role of PHPUnit. PHPUnit is the industry-standard tool for unit testing in PHP, an essential part of a developer's workflow to ensure code quality.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. If the vendor directory is uploaded to a
refers to a critical Remote Code Execution (RCE) vulnerability known as CVE-2017-9841 . This vulnerability arises when the directory of a PHP project—specifically the
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.
Title: "Index of vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php: Understanding the Security Risks and How to Protect Your Server"
Once an attacker executes code via eval‑stdin.php , the entire server is at risk. Common post‑exploitation actions include: A typical search string looks like this: intitle:"Index
If exposed on a web server, an attacker can send arbitrary PHP code in the POST body and get it executed → .
This article explains what this file does, why it is critical when accessible, and how to protect your server. What is eval-stdin.php ?
The string "index of vendor phpunit phpunit src util php eval-stdin.php" is a specific search query used by security researchers and, unfortunately, malicious actors to identify web servers vulnerable to .