OS Command Injection Scanner
Identifies operating system command injection vulnerabilities.
What is OS Command Injection?
OS Command Injection occurs when an application passes unsanitized user input to a system shell or command executor. Attackers can append additional commands using shell metacharacters like ;, |, &&, or backticks, allowing them to execute arbitrary commands with the application's privileges.
Why is This Important?
Command injection is one of the most severe vulnerabilities because it provides direct access to the underlying operating system. Attackers can read and modify any file, install malware, pivot to other systems, exfiltrate data, or completely compromise the server. It's particularly dangerous because many developers underestimate the risk.
How It Works
1. Input Discovery
Maps all user input points including forms, headers, cookies, and API parameters for injection testing.
2. Injection Testing
Executes sophisticated injection payloads designed to bypass filters and WAFs while detecting vulnerabilities.
3. Exploitation Validation
Confirms vulnerabilities through safe exploitation, providing proof-of-concept and impact assessment.
Key Capabilities
Advanced injection detection engine combining signature-based and AI-powered analysis for comprehensive coverage.
- Multi-vector injection testing across all input types
- WAF and filter bypass techniques built-in
- Database-specific payload optimization
- Out-of-band detection for blind vulnerabilities
- Automated proof-of-concept generation
Frequently Asked Questions
What shell metacharacters enable command injection?
Common injection characters include: ; (command separator), | (pipe), && and || (logical operators), ` and $() (command substitution), > and >> (redirection), and newline characters. Different shells (bash, cmd, PowerShell) have varying syntax but similar concepts.
Where does command injection commonly occur?
Common locations include: file operations (ping, nslookup, file converters), image processing (ImageMagick), document generation (PDF tools), backup/archive functions, network utilities, and any feature that shells out to system commands.
How do attackers bypass command injection filters?
Bypass techniques include: encoding (base64, URL, hex), using alternative command separators, newline injection, environment variable expansion, wildcard abuse, and exploiting shell-specific features. Blacklist filtering is notoriously insufficient.
How do I prevent OS command injection?
Avoid calling system commands entirely when possible, use language-native libraries instead, never pass user input to shell functions, use parameterized/array-based command execution, implement strict allowlist validation, and run processes with minimal privileges.
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