Episode 95: Attacking Chrome Extensions with MatanBer - Big Impact on the Client-Side

Critical Thinking - Bug Bounty Podcast

Episode 95: In this episode of Critical Thinking - Bug Bounty Podcast In this episode, Justin is joined by MatanBer to delve into the intricacies of browser extensions. We talk about the structure and threat models, and cover things like service workers, extension pages, and isolated worlds.

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Shoutout to YTCracker for the awesome intro music!

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Today’s Guest: https://x.com/MtnBer

Resources

Universal Code Execution by Chaining Messages in Browser Extensions

https://spaceraccoon.dev/universal-code-execution-browser-extensions/

DOMLogger++

https://github.com/kevin-mizu/domloggerpp

BBRE Metamask bug

https://youtu.be/HnI0w156rtw?si=QixP8SX6JuRFz6PA

Bench Press: Leaking Text Nodes with CSS

https://blog.pspaul.de/posts/bench-press-leaking-text-nodes-with-css/

Timestamps:

(00:00:00) Introduction

(00:03:08) Structure & Threat Model for Browser Extension

(00:28:28) Extension Attack scenarios

(01:01:26) Attacking Extension Pages

(01:26:35) Attacking Service Workers

(01:46:23) Getting source code and dynamic debugging