blind os command injection | portswigger lab

OS command injection basics - https://youtu.be/gUYrRUdjLlg

Detecting blind OS command injection using time delays

You can use an injected command that will trigger a time delay, allowing you to confirm that the command was executed based on the time that the application takes to respond. The ping command is an effective way to do this, as it lets you specify the number of ICMP packets to send, and therefore the time taken for the command to run:

& ping -c 10 127.0.0.1 &

This command will cause the application to ping its loopback network adapter for 10 seconds.

This lab contains a blind OS command injection vulnerability in the feedback function.

The application executes a shell command containing the user-supplied details. The output from the command is not returned in the response.

To solve the lab, exploit the blind OS command injection vulnerability to cause a 10 second delay.

blind os command injection, lab blind os command injection with time delays

OS command injection

In this section, we'll explain what OS command injection is, describe how vulnerabilities can be detected and exploited, spell out some useful commands and techniques for different operating systems, and summarize how to prevent OS command injection.

What is OS command injection?

OS command injection (also known as shell injection) is a web security vulnerability that allows an attacker to execute arbitrary operating system (OS) commands on the server that is running an application, and typically fully compromise the application and all its data. Very often, an attacker can leverage an OS command injection vulnerability to compromise other parts of the hosting infrastructure, exploiting trust relationships to pivot the attack to other systems within the organization.

In this video, CyberWorldSec shows you how to check for os command injection

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os command injection burp, os ... https://www.youtube.com/watch?v=Nk9BUJYifNA