Lab: Blind OS command injection with time delays

PRACTITIONER

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.

Solution

Use Burp Suite to intercept and modify the request that submits feedback.
Modify the email parameter, changing it to:
email=x||ping+-c+10+127.0.0.1||
Observe that the response takes 10 seconds to return.

Community solutions

Rana Khalil

Michael Sommer

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