Which hijacking method involves predicting the sequence numbers that a victim host sends to create a connection that appears to originate from the host, or a blind spoof?

Which hijacking method involves predicting the sequence numbers that a victim host sends to create a connection that appears to originate from the host, or a blind spoof?

• A. Spoofing Attack
• B. Session Hijacking
• C. Blind Hijacking
• D. Man-in-the-Browser Attack

Answer: (C)

Predicting the TCP sequence numbers to slip forged packets into a connection and make them look like they’re coming from the legitimate host is a blind hijacking technique. In TCP, a connection uses sequence numbers to order data and verify legitimacy. If an attacker can guess the correct sequence numbers and send packets with the victim’s IP and port, the remote host can accept those packets as if they came from the real host, effectively taking over the session. The “blind” part means the attacker isn’t watching the traffic to learn the current numbers and must guess them. This differs from a broad spoofing attack, which is about pretending to be someone or something else but not necessarily hijacking a live session by injecting data. It’s also distinct from general session hijacking that may rely on observing the session or exploiting other weaknesses, and from a man-in-the-browser attack, which focuses on malware in the browser rather than manipulating TCP session state.

Predicting the TCP sequence numbers to slip forged packets into a connection and make them look like they’re coming from the legitimate host is a blind hijacking technique. In TCP, a connection uses sequence numbers to order data and verify legitimacy. If an attacker can guess the correct sequence numbers and send packets with the victim’s IP and port, the remote host can accept those packets as if they came from the real host, effectively taking over the session. The “blind” part means the attacker isn’t watching the traffic to learn the current numbers and must guess them.

This differs from a broad spoofing attack, which is about pretending to be someone or something else but not necessarily hijacking a live session by injecting data. It’s also distinct from general session hijacking that may rely on observing the session or exploiting other weaknesses, and from a man-in-the-browser attack, which focuses on malware in the browser rather than manipulating TCP session state.