~/talk

Bridging the Gap Between Research and Practice in Intelligently Bypassing WAF

Talkat Black Hat Europe 2022 · 2022-12-05..12-08· [security, machine-learning]
name:Cheng Chi
links:none on file
slides:none on file

Claims an automated bypass pipeline that uses PPO reinforcement learning to sequence small, expert-derived atomic mutations and a grammar- and lexical-based mutation step to preserve payload semantics. Training splits vendor sandboxes and attack targets to cut attempts; experiments generate ~20,000 executable samples, extract ~20 black‑box bypass modes, find >50 white‑box modes, and achieve nearly 100% success against multiple commercial WAFs. Solution is integrated into vendor rules and verified as a “one‑click injection” against dozens of customers.

AI-written summary · about

  1. 0:00Introduction
  2. 0:57Agenda
  3. 1:53Related Works
  4. 7:15Key Issues
  5. 9:15Our Research
  6. 13:28Our Workflow
  7. 14:20Our Scheme
  8. 16:33Device Environment
  9. 18:07Semantic Environment
  10. 19:36Core Algorithm
  11. 23:33Experimental Results
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