Hex Overflow Technique Used to Bypass WAF
/ 1 min read
🧩 Cybersecurity Enthusiast Demonstrates Hex Overflow to Bypass WAF. Syed Mushfik Hasan Tahsin, a 20-year-old cybersecurity enthusiast, detailed his experience bypassing the BIG IP Local Traffic Manager (F5 Networks) Web Application Firewall (WAF) using a technique called Hex Overflow. Initially blocked by the WAF, he discovered that manipulating hexadecimal encoding allowed him to craft payloads that evaded detection. By exploiting the peculiarities of the URL decoder, he demonstrated how to represent characters like the equal sign in various ways, ultimately leading to successful payload execution. Tahsin emphasized the rarity of encountering such flawed decoders and shared insights into the complexities of the bypassing process, highlighting the fun and challenges of cybersecurity exploration.
