# Improper Neutralization of Special Elements used in a Command ('Command Injection') (CWE-77)

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

- Prevalence: High No Shoulder rules
- Impact: High OWASP Top 10 #3
- Prevention: See MITRE External reference

**OWASP:** Injection (A03:2021-Injection) - #3

## Description

Command injection vulnerabilities typically occur when data enters the application from an untrusted source, the data is part of a string that is executed as a command by the application, and the execution of the command allows the attacker to execute commands that they would not normally be able to execute.

## Prevention

## Consequences

- Execute Unauthorized Commands
- Read Application Data
- Modify Application Data
- DoS

## Mitigations

- Use library calls rather than external processes to recreate the desired functionality
- Run code in a sandbox environment that enforces strict boundaries
- Use a vetted library or framework that does not allow this weakness