Execution of OS command formed with user input detected.

• Rule ID: php_lang_exec_using_user_input
• Languages: php
• Source: exec_using_user_input.yml

Description

Applications should not execute OS commands that are formed from user input. This rule checks for external commands containing user-supplied data.

Remediations

❌ Avoid using user input when executing commands:

exec($_GET["command"]);

✅ Use user input indirectly when executing commands:

if ($_GET["action"] == "option1") {
  $command = "command1";
} else {
  $command = "command2";
}

exec($command);

Resources

• OWASP OS command injection cheat sheet

Associated CWE

• CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

OWASP Top 10

• A03:2021 - Injection

Configuration

To skip this rule during a scan, use the following flag

bearer scan /path/to/your-project/ --skip-rule=php_lang_exec_using_user_input

To run only this rule during a scan, use the following flag

bearer scan /path/to/your-project/ --only-rule=php_lang_exec_using_user_input