TCP/IP Hijacking: Advanced Techniques

"A deep dive into session hijacking, packet injection, and BGP routing security."

PopDocs Intel

May 10, 2026

1 MIN

TCP/IP Hijacking and Session Persistence

TCP hijacking is a significant threat in unsecured networks. This writeup covers the methodology of session hijacking and how to mitigate it at the network layer.

1. Sequence Number Prediction

Modern TCP stacks use strong random sequence numbers (ISN). However, older systems or specific implementations are still vulnerable to prediction attacks.

2. BGP Hijacking

BGP (Border Gateway Protocol) is the backbone of the internet. By announcing false routes, attackers can redirect traffic to malicious nodes.

Mitigation Strategies:

RPKI: Resource Public Key Infrastructure for verifying BGP announcements.
TLS/IPsec: Encrypting end-to-end traffic to prevent plaintext interception.

bash

# Verify route propagation
traceroute 8.8.8.8