Beginner Guide to OS Command Injection

The dynamic Web applications may make the most of scripts to call up some functionality in the command line on the web server to process the input that received from the client and unsafe user input may led to OS command injection. OS Command injection is refer as shell injection attack arise when an attacker try to perform system level commands through a vulnerable application in order to retrieve information of web server or try to make unauthorized access into server .

Impact Analysis

Impact: Critical

Ease of Exploitability: Medium

Risk Rating: High

In this attack the attacker will inject his unwanted system level command so that he can fetch the information of web server; for example: ls , whoami , uname -a and etc.

Let’s consider a scenario where web application allows user to PING an IP other user so that it get confirms that the host connection 

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