Critical Thinking - Bug Bounty Podcast

Latest Episodes:

Episode 35: King of Collaboration: Douglas Day Sep 07, 2023

Show notes

Episode 35: In this episode of Critical Thinking - Bug Bounty Podcast, we're thrilled to welcome Douglas Day, a bug bounty hunter known for his unique methodologies and collaborative spirit. We talk about his approach to finding new endpoints in applications, his ingenious technique of exploiting Intercom widgets, and collaboration preferences and tips at LHEs. We also touch on the struggle of justifying hobbies that don't generate income and the importance of finding enjoyment in the process.We hope you enjoy this episode as much as we did!

We're new to this podcasting thing, so feel free to send us any feedback here: info@criticalthinkingpodcast.io

Shoutout to YTCracker for the awesome intro music!

------ Links ------

Follow your hosts Rhynorater & Teknogeek on twitter:

https://twitter.com/0xteknogeek

https://twitter.com/rhynorater

Today’s Guest:

https://twitter.com/ArchAngelDDay

https://hackerone.com/the_arch_angel

https://bugcrowd.com/arch_angel

100 Short Bug Bounty Rules

https://twitter.com/ArchAngelDDay/status/1661924038875435008

Blog about Intercom

https://dday.us/2021/11/03/h1vendorATO.html

Blog about Mapping Hacking

http://dday.us/2021/10/09/Mapyourhacking.html

Timestamps: (00:00:00) Introduction

(00:03:01) Douglas Day’s infosec and LHE intro

(00:10:42) Evolution and philosophy of collaboration

(00:23:08) Balancing Collaboration and Money

(00:29:43) Recap of 100 Short Bug Bounty Rules

(00:37:15) Bug-hunting Methodology

(00:45:45) Using match and replace to find new endpoints in bug hunting

(00:49:07) Exploiting Intercom widgets

(00:52:35) Facing Failure and enjoying the journey

(00:57:00) Managing work-life balance

(01:05:55) Auth-Z testing and documentation

(01:12:25) Vulnerabilities in applications

(01:17:05) Mapping Hacking Sessions

Episode 34: Program vs Hacker Debate Aug 31, 2023

Show notes

Episode 34: In this episode of Critical Thinking - Bug Bounty Podcast, Justin and Joel have both beaten COVID and now square off against each other in a mega-debate representing hackers and program managers respectively. Among the topics included are Disclosures, Dupes, Zero-Day Policy, payouts, budgets, Triage and Retesting. So, if you want blood-pumping, insult-hurling opinion-invalidating debate…then maybe look somewhere else. But if a thought-provoking discussion about bug bounty is more your style, then take a seat and get ready!

We're new to this podcasting thing, so feel free to send us any feedback here: info@criticalthinkingpodcast.io

Shoutout to YTCracker for the awesome intro music!

------ Links ------

Follow your hosts Rhynorater & Teknogeek on twitter:

https://twitter.com/0xteknogeek

https://twitter.com/rhynorater

Prompt Injection Primer for Engineers

https://twitter.com/rez0__/status/1695078576104833291

Portswigger on XSS

https://twitter.com/PortSwiggerRes/status/1691812241375424983

Gunner Andrews talk

https://www.youtube.com/watch?v=aaDe1ADh5KM

Jhaddix live training Givaway

https://tbhmlive.com/

ctbb.show/giveaway

New Website

ctbb.show

Fight music composed by Dayn Leonardson

https://www.daynleo.com/

Timestamps:

(00:00:00) Introduction

(00:02:00) Joel’s DEFCON Recap

(00:04:45) Prompt Injection Primer for Engineers by Rez0

(00:07:00) Portswigger Research and XSS

(00:08:36) Gunnar Andrews' talk on serverless architecture

(00:10:10) ‘Bug Hunter Methodology’ Course Giveaway

The Debate

(00:13:34) Zero-Day Policy and Payment for Vulnerabilities

(00:25:40) Disclosure

(00:33:52) Dupes (00:51:23) CVSS

(01:02:25) Budgets and Payouts

(01:15:00) Triage and Retesting

(01:34:55) Withholding Reports

(01:41:50) Root Cause Analysis

(01:52:25) Interacting with hacker reports from a security standpoint.

(01:58:50) Internal Activity on a Report

(02:01:15) Cost of running Bug Bounty Programs and LHE’s

Episode 33: The Master of Hacker Show&Tell: Inti De Ceukelaire Aug 24, 2023

Show notes

Episode 33: In this episode of Critical Thinking - Bug Bounty Podcast, we welcome Inti De Ceukelaire, a seasoned bug hunter known for his creative storytelling and impactful show-and-tell bugs…and let us tell you, his stories do not disappoint! From his bug bounty journey to some pretty wild hacks, Inti captivates us as only Inti can. We discuss the potential life-saving impact of bug bounty reports, especially in areas such as transportation and medical devices. We also cover hacker mentality, the benefits of objective-based challenges, and the need for collaboration and alignment within the bug bounty community. It’s a mesmerizing episode, so sit back and be swept away by Inti’s tales.

We're new to this podcasting thing, so feel free to send us any feedback here: info@criticalthinkingpodcast.io

Shoutout to YTCracker for the awesome intro music!

------ Links ------

Follow your hosts Rhynorater & Teknogeek on twitter:

https://twitter.com/0xteknogeek

https://twitter.com/rhynorater

Today’s Guest:

https://twitter.com/securinti

Inti's Shopify Show-and-Tell

https://hackerone.com/reports/1086108

Hakluke's article on Bug Bounty Standards

https://github.com/hakluke/bug-bounty-standards

Researching MissingNo Glitch in Pokemon

https://youtu.be/p8OBktd42GI

Intigriti

https://www.intigriti.com/

Timestamps:

(00:00:00) Introduction

(00:03:01) Show-and-Tells and Storytelling in Live Hacking Events

(00:08:30) Impact Assessment and the potential real-life significance of reporting vulnerabilities.

(00:13:50) Ethical dilemmas, gaming the systems, and safe harbor.

(00:23:30) Inti’s Hacking Journey

(00:27:26) Hacker mentality, brainstorming, and goal-setting.

(00:46:28) The benefit of mental resets, fresh perspectives, and ‘surprise collaboration’

(00:52:55) Inti’s Story 1: CSS Injection bugs

(01:06:20) Inti’s Story 2: The Ticket Trick

(01:14:00) Inti’s Story 3: The Gotcha PasswordBug

(01:18:30) Upcoming Intigriti Live Hacking Event

Episode 32: The Great Write-up Low-down Aug 17, 2023

Show notes

Episode 32: In this episode of Critical Thinking - Bug Bounty Podcast, Joel caught a nasty bug (no, not that kind) so Justin is flying solo, and catches us up to speed on what's been happening in hacking news.

We're new to this podcasting thing, so feel free to send us any feedback here: info@criticalthinkingpodcast.io

Shoutout to YTCracker for the awesome intro music!

------ Links ------

Follow your hosts Rhynorater & Teknogeek on twitter:

https://twitter.com/0xteknogeek

https://twitter.com/rhynorater

Smashing the State article

https://portswigger.net/research/smashing-the-state-machine?ps_source=portswiggerres&ps_medium=social&ps_campaign=race-conditions

Nagles Algorithm

https://en.wikipedia.org/wiki/Nagle%27s_algorithm

HTTP/2 RFC

https://httpwg.org/specs/rfc7540.html

Tweet by Alex Chapman

https://twitter.com/ajxchapman/status/1691103677920968704?s=20

Cookieless Duodrop IIS Auth Bypass

https://soroush.me/blog/2023/08/cookieless-duodrop-iis-auth-bypass-app-pool-privesc-in-asp-net-framework-cve-2023-36899/

Xss and .Net

https://blog.isec.pl/all-is-xss-that-comes-to-the-net/

Shopify Account Takeover

https://ophionsecurity.com/blog/shopify-acount-takeover

Short Name Guesser

https://github.com/projectmonke/shortnameguesser

Hacking Points.com

https://samcurry.net/Points-com/

Hacking Starbucks

https://samcurry.net/hacking-starbucks/

Bug Bounty Tag Request

https://twitter.com/ajxchapman/status/1688892093597470720

Sandwich Attack

https://www.landh.tech/blog/20230811-sandwich-attack

Timestamps:

(00:00:00) Introduction

(00:01:25) Smashing the State

(00:11:30) HTTP/2 RFC

(00:17:30) Cookieless Duodrop IIS Auth Bypass

(00:24:45) Takeovers and Tools

(00:32:30) Sam Curry writeup

(00:53:10) Community requests

(00:55:10) Sandwich Attacks

Episode 31: Alex Chapman - The Man of Many Crits Aug 10, 2023

Show notes

Episode 31: In this episode of Critical Thinking - Bug Bounty Podcast, we're thrilled to be joined by Alex Chapman, a seasoned InfoSec hacker and bug bounty hunter. We kick off with Alex sharing his hacking journey, from a guest lecturer that inspired him, to working on internal Red Teams, to his transition to working with HackerOne, and finally as a bug bounty hunter focusing on searching out those few, high impact bugs. We also discuss the power of collaboration, the challenges of balancing hacking with other responsibilities, and the necessity of flexibility and taking breaks in bug bounty work. Don't miss this episode where we explore the depths of bug bounty with Alex Chapman!

We're new to this podcasting thing, so feel free to send us any feedback here: info@criticalthinkingpodcast.io

Shoutout to YTCracker for the awesome intro music!

------ Links ------

Follow your hosts Rhynorater & Teknogeek on twitter:

https://twitter.com/0xteknogeek

https://twitter.com/rhynorater

Today’s Guest:

https://twitter.com/ajxchapman

@ajxchapman@infosec.exchange

https://ajxchapman.github.io/

https://hackerone.com/ajxchapman?type=user

Perforce RCE

https://hackerone.com/reports/1830220

https://ajxchapman.github.io/bugreports/2019/04/04/perforce-local-file-disclosure.html

(00:00:00) Introduction

(00:01:50) Alex Chapman's InfoSec journey and evolution

(00:05:55) Real-world experience vs. chasing degrees, and the pivot into Bug Bounty

(00:13:12) The benefit of programming knowledge

(00:16:50) Experience in Internal Red Team and hacker mentalities.

(00:23:35) Transitioning to HackerOne and full time Bug Bounty

(00:33:37) Bug Bounty tips, time management, and best practices

(00:41:00) The importance of note-taking and organizational tools

(00:46:27) Hunting Methodologies and focusing on Critical Exploitations

(01:02:37) Collaboration in the hacking community

(01:06:00) Binary Exploitation and Source Code Review

(01:10:59) Configuration file injections

(01:17:38) Justin vs. Alex at a LHE

Episode 30: Recon Legend Shubs - From Burgers to Bounties Aug 03, 2023

Show notes

Episode 30: In this episode of Critical Thinking - Bug Bounty Podcast, we're thrilled to be joined by renowned bug bounty hunter Shubs. We kick off with him sharing his journey from burgers to bugs, and how his friendly rivalry with a fellow hacker fueled his passion for reconnaissance, as well as his love of collaboration. We then shift gears to talk about the art of debugging, ethics and economics of bug bounty hunting, the transition to Entrepreneur, and the evolution of Assetnote from a reconnaissance tool to enterprise security software suite. This one’s a banger, and we don’t want you to miss it!

We're new to this podcasting thing, so feel free to send us any feedback here: info@criticalthinkingpodcast.io

Shoutout to YTCracker for the awesome intro music!

------ Links ------

Follow your hosts Rhynorater & Teknogeek on twitter:

https://twitter.com/0xteknogeek

https://twitter.com/rhynorater

Today’s Guest:

@infosec_au

Intro Shoutouts

https://twitter.com/bebiksior

https://cvssadvisor.com/

Assetnote

https://www.assetnote.io/

https://twitter.com/assetnote

Bishop Fox

https://bishopfox.com/

Shortscan

https://github.com/bitquark/shortscan

XXE Payload

https://gist.github.com/Rhynorater/d0d19f757221a916a22476c3a5c6aba2

Timestamps

(00:00:00) Introduction

(00:05:48) History as a Hacker: Recon, rivalries, and Riot Games

(00:12:13) Collaboration and Community in Bug Bounty

(00:18:19) The Art of Debugging

(00:21:48) Assetnote News and overview

(00:30:43) CVE reversing

(00:32:58) Zero-day vulns

(00:42:48) Bug Bounty Ethics and Economics

(00:52:53) Bug Bounty and Entrepreneurship

(01:03:58) Business lessons learned

(01:07:48) Advice for Hunters looking to grow

(01:12:38) IIS Server Techniques

Episode 29: Live Episode with Sean Yeoh - Assetnote Engineer Jul 27, 2023

Show notes

Episode 29: In this episode of Critical Thinking - Bug Bounty Podcast sit down with Assetnote Engineer Sean Yeoh, and pick his brain about what he's learned on his development journey. We talk about the place and importance of message brokers, and which ones we like best, as well as his engineering philosophy regarding bottleneck prevention and the importance of pursuing optimization. Don't miss this episode of terrific technical tips!

We're new to this podcasting thing, so feel free to send us any feedback here: info@criticalthinkingpodcast.io

Shoutout to YTCracker for the awesome intro music!

------ Links ------

Follow your hosts Rhynorater & Teknogeek on twitter:

https://twitter.com/0xteknogeek

https://twitter.com/rhynorater

Today’s Guest:

https://twitter.com/seanyeoh

Assetnote

https://www.assetnote.io/

https://twitter.com/assetnote

XKCD automation graph

https://xkcd.com/1319/

Github repository

https://github.com/alex/what-happens-when

Article about Queues

https://archive.is/Nan4e

NATS

https://nats.io/

MongoDB

https://www.mongodb.com/

Timestamps:

(00:00:00) Introduction

(00:01:18) Story of Assetnote

(00:05:20) Message Brokers and event-driven architectures

(00:11:15) Preventing bottlenecks and pursuing optimization

(00:21:35) Using a profiler

(00:28:30) Choosing a Message Broker

(00:33:00) Kubernetes and Conntrack Limits

(00:37:13) Databases

(00:46:30) Bug bounty tips: Sub-domain vs. IP Address

(00:51:15) Engineering quandaries

(00:53:38) DNS Wildcards

Episode 28: Surfin' with CSRFs Jul 20, 2023

Show notes

Episode 28: In this episode of Critical Thinking - Bug Bounty Podcast, the CSRF’s up, dude! We kick off with a debate about whether or not deep link vulns in mobile apps can be considered CSRF. We also talk browser extensions and tools like Hackbar, PwnFox, and JS Weasel, and Justin tries to invent a whole new vuln term. There’s plenty of good stuff here, so what are you waiting for? Jump on in!

We're new to this podcasting thing, so feel free to send us any feedback here: info@criticalthinkingpodcast.io

Shoutout to YTCracker for the awesome intro music!

------ Links ------

Follow your hosts Rhynorater & Teknogeek on twitter:

https://twitter.com/0xteknogeek

https://twitter.com/rhynorater

rez0's latest tip

https://twitter.com/rez0__/status/168134822190014466019

Hackbar

https://addons.mozilla.org/en-US/firefox/addon/hackbartool/

PwnFox

https://twitter.com/adrien_jeanneau/status/1681364665354289152

JS Weasel

https://www.jswzl.io/

Charlie Eriksen

https://twitter.com/CharlieEriksen

Link to talk by Rojan

https://twitter.com/uraniumhacker/status/1681381857383030785

Bypassing GitHub's OAuth flow

https://blog.teddykatz.com/2019/11/05/github-oauth-bypass.html

Great SameSite Confusion

https://jub0bs.com/posts/2021-01-29-great-samesite-confusion/

Check out Nahamsec's Channel

https://www.youtube.com/c/nahamsec

Timestamps:

(0:01:45) The deep link debate

(00:08:00) LHE and in-person interviews

(00:09:25) SQLMAP and raw requests

(00:11:11) Hackbar, PwnFox, and browser extensions

(00:16:45) JS Weasel tool and its features

(00:25:28) Rojan's Research and Public Talks

(Start of main content)

(00:28:36) Cross-Site Request Forgery (CSRF)

(00:35:00) Bypassing GitHub's OAuth flow

(00:45:00) A Small SameSite Story

(00:48:50) CSRF Exploitation Techniques

(01:07:15) CSRF Bug Stories

(01:15:30) NahamSec and DEFCON

Episode 27: Top 7 Esoteric Web Vulnerabilities Jul 13, 2023

Show notes

Episode 27: In this episode of Critical Thinking - Bug Bounty Podcast, we've switched places and now Joel is home while Justin is on the move. We break down seven esoteric web vulnerabilities, and talk Cookies, Config File Injections, Client-side path traversals and more. We also briefly discuss appliance hacking, new tools, and shout out some new talent in the hacking space. Don't miss this episode full of cool vulns, and experience Justin's vocal decline in real time.

We're new to this podcasting thing, so feel free to send us any feedback here: info@criticalthinkingpodcast.io

Shoutout to YTCracker for the awesome intro music!

------ Links ------

Follow your hosts Rhynorater & Teknogeek on twitter:

https://twitter.com/0xteknogeek

https://twitter.com/rhynorater

Encrypted Doesn't Mean Authenticated:

https://blog.assetnote.io/2023/07/04/citrix-sharefile-rce/

Tweet about headless chrome browser

https://twitter.com/bhavukjain1/status/1678719047209484288?t=NWnZvwHTRMyH_lVC-uXe0g&s=19

Shout out to new talent within the hacking space

https://twitter.com/haxrob

https://twitter.com/atc1441

Tweet about hacking Google Search Appliance

https://twitter.com/orange_8361/status/1677378401957724160

Bitquark releases shortscan

https://twitter.com/bitquark/status/1677647450989838338

Hacking Starbucks

https://samcurry.net/hacking-starbucks/

Justin's CookieJar Tool

https://apps.rhynorater.dev/checkCookieJarOverflow.html

HackTricks

https://book.hacktricks.xyz/pentesting-web/hacking-with-cookies/cookie-jar-overflow

XSLeak

https://xsleaks.dev

Timestamps:

(00:00:00) Introduction

(00:04:00) Assetnote on ShareFile RCE

(00:13:05) Headless Browsers

(00:17:00) Hacker Content Creators

(00:22:51) Appliance Hacking

(00:30:31) Shortscan Release

(Start of main content)

(00:35:39) Config File Injection

(00:44:00) Client-side Path Traversal

(00:51:33) Cookie Bombing

(00:58:00) Cookie Jar Overflow

(01:03:50) XSLeak

(01:10:49) UNC Path Injection

(01:15:50) Impactful Link Hijack

Episode 26: Client-side Quirks & Browser Hacks Jul 06, 2023

Show notes

In this episode of Critical Thinking - Bug Bounty Podcast, we're back with Joel, fresh (haha) off of back-to-back live hack events in London and Seoul. We compare the different vibes of each LHE, then we dive into the technical thick of it, and talk web browsers, XSS vectors, new tools, CVSS 4.

We're new to this podcasting thing, so feel free to send us any feedback here: info@criticalthinkingpodcast.io

Shoutout to YTCracker for the awesome intro music!

------ Links ------

Follow your hosts Rhynorater & Teknogeek on twitter:

______

Hunting for NGINX alias traversals in the wild

PortSwigger Tweet

Soroush's Follow-up

Tweet about magic math element

<22 weird XSS behavior

Lupin’s follow-up

Patch diffing