Command Injection

Summary

Command Injection is a type of application attack where an attacker exploits vulnerabilities to execute arbitrary system commands on a host server through a vulnerable application.

Key Characteristics

• Exploits improper input validation in applications.
• Allows execution of arbitrary OS commands via user-supplied input.
• Can lead to unauthorized data access, system compromise, or denial of service.
• Often targets web applications that pass user input to system shells.
• May result in privilege escalation depending on the application’s permissions.

Defensive Controls

• Implement strict input validation and sanitization to reject malicious characters.
• Use parameterized APIs or safe libraries instead of direct command execution.
• Apply the principle of least privilege to limit application permissions.
• Employ web application firewalls (WAF) to detect and block injection attempts.
• Conduct regular code reviews and security testing focused on injection flaws.

Related Security Solutions

Security solutions related to Command Injection include Web Application Firewalls (WAFs), Runtime Application Self-Protection (RASP), secure coding practices, static and dynamic application security testing (SAST/DAST), and endpoint protection platforms that monitor abnormal system command executions.