Exposure of Sensitive Information to an Unauthorized Actor

Summary

The package msgraph-sdk-php is the Microsoft Graph Library for PHP. The Microsoft Graph PHP SDK published packages that contained test code that enabled the use of the "phpInfo()" function from any application that could access and execute the file at "vendor/microsoft/microsoft-graph/tests/GetPhpInfo.php". The "phpInfo" function exposes system information. The vulnerability affects the "GetPhpInfo.php" script of the PHP SDK which contains a call to the "phpinfo()" function. This vulnerability requires a misconfiguration of the server to be present so it can be exploited. For example, making the PHP application's "/vendor" directory web-accessible. The combination of the vulnerability and the server misconfiguration would allow an attacker to craft an HTTP request that executes the "phpinfo()" method. The attacker would then be able to get access to system information like configuration, modules, and environment variables and later on, use the compromised secrets to access additional data. If an immediate deployment with the updated vendor package is not available, you can perform the following temporary workarounds: delete the `vendor/microsoft/microsoft-graph/tests/GetPhpInfo.php` file, remove access to the `/vendor` directory, or disable the "phpinfo" function. This issue affects versions prior to 1.109.1, and 2.0.x prior to 2.0.0-RC5. This has the same fix as CVE-2023-49283.