The exploitation chain for CVE-2017-9841 is straightforward:
: Remote Code Execution (RCE) / Code Injection Severity : Critical (CVSS v3.1: 9.8)
The problem centers on an internal testing utility located at vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php . The file originally contained a single line of code designed to read code from standard command-line inputs: eval('?>' . file_get_contents('php://input')); Use code with caution. vendor phpunit phpunit src util php eval-stdin.php cve
: The stream wrapper php://input allows an application to read raw data directly from the body of an HTTP POST request.
This vulnerability exists in the eval-stdin.php file, which is part of the testing framework. The script was designed to process input for unit tests but was inadvertently left with a major security flaw: it uses eval() on raw data from the php://input wrapper. : The stream wrapper php://input allows an application
:
The following PHPUnit versions are affected: : The following PHPUnit versions are affected: CVE-2017-9841
CVE-2017-9841 is a Remote Code Execution vulnerability in PHPUnit, the industry-standard testing framework for PHP. The flaw affects: PHPUnit versions before 4.8.28 PHPUnit versions 5.x before 5.6.3
Securing your application against this vulnerability involves proactive maintenance and secure configuration. 1. Update PHPUnit
Despite being an older vulnerability, it remains a frequent target for automated scanners and botnets like because many legacy systems still have exposed /vendor directories.