Certified Ethical Hacker (CEH v11) — Question 83

Samuel, a professional hacker, monitored and intercepted already established traffic between Bob and a host machine to predict Bob's ISN. Using this ISN,
Samuel sent spoofed packets with Bob's IP address to the host machine. The host machine responded with a packet having an incremented ISN. Consequently,
Bob's connection got hung, and Samuel was able to communicate with the host machine on behalf of Bob.
What is the type of attack performed by Samuel in the above scenario?

Answer options

• A. TCP/IP hijacking
• B. Blind hijacking
• C. UDP hijacking
• D. Forbidden attack

Correct answer: A

Explanation

Samuel's actions represent TCP/IP hijacking because he took control of Bob's connection by predicting and using the ISN to send spoofed packets. Blind hijacking would imply that he was unable to see the traffic, which he did. UDP hijacking is not applicable since the scenario involves TCP traffic, and 'Forbidden attack' is not a recognized term for this type of attack.