Critical Thinking - Bug Bounty Podcast

Latest Episodes:

Episode 65: Motivation and Methodology with Sam Curry (Zlz) Apr 04, 2024

Show notes

Episode 65: In this episode of Critical Thinking - Bug Bounty Podcast we sit down with Sam Curry to discuss the ethical considerations and effectiveness of hacking, the importance of good intent, and the enjoyment Sam derives from pushing the boundaries to find bugs. He shares stories of his experiences, including hacking Tesla, online casinos,Starbucks, his own is ISP router, and even getting detained at the airport.

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

Project Discovery Conference: https://nux.gg/hss24

------ Ways to Support CTBBPodcast ------

Hop on the CTBB Discord at https://ctbb.show/discord!

We also do Discord subs at $25, $10, and $5 - premium subscribers get access to private masterclasses, exploits, tools, scripts, un-redacted bug reports, etc.

Today’s Guest:

https://samcurry.net/

Resources:

Don’t Force Yourself to Become a Bug Bounty Hunter

hackcompute

Starbucks Bug

recollapse

Timestamps:

(00:00:00) Introduction

(00:02:25) Hacking Journey and the limits of Ethical Hacking

(00:28:28) Selecting companies to hack

(00:33:22) Fostering passion vs. Forcing performance

(00:54:06) Collaboration and Hackcompute

(01:00:40) The Efficacy of Bug Bounty

(01:09:20) Secondary Context Bugs

(01:25:01) Mindmaps, note-taking, and Intuition.

(01:46:56) Back-end traversals and Unicode

(01:56:16) Hacking ISP

(02:06:58) Next.js and Crypto

(02:22:24) Dev vs. Prod JWT

Episode 64: .NET Remoting, CDN Attack Surface, and Recon vs Main App Mar 28, 2024

Show notes

Episode 64: In this episode of Critical Thinking - Bug Bounty Podcast we talk about Justin and Joel delve into .NET remoting and how it can be exploited, a recent bypass in the Dom Purify library and some interesting functionality in the Cloudflare CDN-CGI endpoint. They also touch on the importance of collaboration and knowledge sharing, JavaScript Deobfuscation, the value of impactful POCs, hiding XSS payloads with URL path updates.

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

------ Ways to Support CTBBPodcast ------

Hop on the CTBB Discord at https://ctbb.show/discord!

We also do Discord subs at $25, $10, and $5 - premium subscribers get access to private masterclasses, exploits, tools, scripts, un-redacted bug reports, etc.

Check out Project Discovery’s nuclei 3.2 release blog at nux.gg/podcast

Resources:

.NET Remoting

https://code-white.com/blog/leaking-objrefs-to-exploit-http-dotnet-remoting/

https://github.com/codewhitesec/HttpRemotingObjRefLeak

DOM Purify Bug

Cloudflare /cdn-cgi/

https://developers.cloudflare.com/fundamentals/reference/cdn-cgi-endpoint/

https://portswigger.net/research/when-security-features-collide

https://twitter.com/kinugawamasato/status/893404078365069312

https://twitter.com/m4ll0k/status/1770153059496108231

XSSDoctor's writeup on Javascript deobfuscation

renniepak's tweet

Naffy's tweet

Timestamps:

(00:00:00) Introduction

(00:07:15) .Net Remoting

(00:17:29) DOM Purify Bug

(00:25:56) Cloudflare /cdn-cgi/

(00:37:11) Javascript deobfuscation

(00:47:26) renniepak's tweet

(00:55:20) Naffy's tweet

Episode 63: JHaddix Returns Mar 21, 2024

Show notes

Episode 63: In this episode of Critical Thinking - Bug Bounty Podcast we welcome back Jason Haddix (From Episode 12) to talk about some updates to his The Bug Hunter's Methodology, as well as his own personal life and hacking journey. We talk about the start of his new company, and then venture into topics such as using threat intelligence and buying credentials from the dark web, recon techniques, and ways to integrate AI into your workflow (or target list).

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

------ Ways to Support CTBBPodcast ------

Hop on the CTBB Discord at https://ctbb.show/discord!

We also do Discord subs at $25, $10, and $5 - premium subscribers get access to private masterclasses, exploits, tools, scripts, un-redacted bug reports, etc.

Today’s Guest:

https://twitter.com/Jhaddix

https://www.arcanum-sec.com/

Resources:

Dehashed

https://www.dehashed.com/

Flare

https://flare.io/

CSP Recon

https://github.com/edoardottt/csprecon

Timestamps:

(00:00:00) Introduction

(00:05:37) Updates to The Bug Hunter's Methodology

(00:14:46) Red Teaming

(00:21:29) Bug Bounty on the Dark Web

(00:36:19) FIS hunting

(00:47:59) New Recon Techniques

(00:58:32) AI integrations and bounties

Episode 62: Frontend Language Oddities Mar 14, 2024

Show notes

Episode 62: In this episode of Critical Thinking - Bug Bounty Podcast Justin and Joel are back with some additional research resources that didn’t make the Portswigger Top-Ten, but that are worth looking at.

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:

------ Ways to Support CTBBPodcast ------

Hop on the CTBB Discord at https://ctbb.show/discord!

We also do Discord subs at $25, $10, and $5 - premium subscribers get access to private masterclasses, exploits, tools, scripts, un-redacted bug reports, etc.

Resources:

Cool HTML Shit

https://twitter.com/jcubic/status/1764311080661082201

https://twitter.com/encodeart/status/1764218128374943764

Bug bounty Hunting Journeys

https://twitter.com/ajxchapman/status/1762101366057525521

https://monkehacks.beehiiv.com/p/monkehacks-02

Yelp Cookie Bridge Report

Deobfuscating/Unminifying Obfuscated Code

ChatGPT Source Watch

Web Security Research Reddit

Nahamsec Resources

Portswigger Nominations list

Abusing perspectives: https://hackerone.com/reports/2401115

PortSwigger CSS Exfiltration

https://github.com/PortSwigger/css-exfiltration

Timestamps:

(00:00:00) Introduction

(00:02:06) Cool HTML Shit

(00:15:31) Bug Bounty Journeys

(00:28:01) Yelp Cookie Bridge Bug

(00:37:56) Additional Research Resources

(00:46:34) CSS and abusing perspectives

Episode 61: A Hacker on Wall Street - JR0ch17 Mar 07, 2024

Show notes

Episode 61: In this episode of Critical Thinking - Bug Bounty Podcast Justin is joined by Jasmin Landry to share some stories about startup security, bug bounty, and the challenges of balancing both. He also shares his methodology for discovering OAuth-related bugs, highlights some differences between structured learning and self-teaching, and then walks us through a couple arbitrary ATO’s and SSTI to RCE bugs he’s found lately.

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

------ Ways to Support CTBBPodcast ------

Hop on the CTBB Discord at https://ctbb.show/discord!

We also do Discord subs at $25, $10, and $5 - premium subscribers get access to private masterclasses, exploits, tools, scripts, un-redacted bug reports, etc.

Today’s Guest: Jasmin Landry

https://twitter.com/JR0ch17

Resources:

Dirty Dancing blog post

https://labs.detectify.com/writeups/account-hijacking-using-dirty-dancing-in-sign-in-oauth-flows/

OAuth 2.0 Threat Model and Security Considerations

https://datatracker.ietf.org/doc/html/rfc6819

OAuth 2.0 Security Best Current Practice

https://datatracker.ietf.org/doc/html/draft-ietf-oauth-security-topics

Timestamps:

(00:00:00) Introduction

(00:02:20) Meta Tag + DomPurify Bug

(00:09:36) Jasmin's Origin story

(00:28:23) Full time Bug bounty challenges

(00:36:57) Career jumps in Security and current Role

(00:47:32) OAuth Bug methodology and cool bug stories

(01:02:35) Social Engineering and Bug Bounty

(01:13:41) Arbitrary ATO bug

(01:19:41) SSTI to RCE bug

Episode 60: Our Take on PortSwigger's Top 10 Web Hacking Techniques of 2023 Feb 29, 2024

Show notes

Episode 60: In this episode of Critical Thinking - Bug Bounty Podcast Justin and Joel review the Portswigger Research list of top 10 web hacking techniques of 2023.

Send us any feedback here: info@criticalthinkingpodcast.io

Shoutout to YTCracker for the awesome intro music!

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

Follow your hosts Rhynorater & Teknogeek on twitter:

------ Ways to Support CTBBPodcast ------

Hop on the CTBB Discord

We also do Discord subs at $25, $10, $5 - premium subscribers get access to private masterclasses, exploits, tools, scripts, un-redacted bug reports, etc.

Resources:

Top 10 web hacking techniques of 2023

1: Smashing the state machine

8: From Akamai to F5 to NTLM

3: SMTP Smuggling

4: PHP filter chains

(Bonus Read)

5: HTTP Parsers Inconsistencies

6: HTTP Request Splitting

7: How I Hacked Microsoft Teams

9: Cookie Crumbles

(Bonus Read)

10: Hacking root EPP servers to take control of zones

Timestamps:

(00:00:00) Introduction

(00:04:26) 1: Smashing the state machine

(00:11:56) 8: From Akamai to F5 to NTLM... with love

(00:17:11) 3: SMTP Smuggling

(00:26:27) 4: PHP filter chains

(00:36:40) 5: HTTP Parsers Inconsistencies

(00:44:56) 6: HTTP Request Splitting

(00:53:43) 7: How I Hacked Microsoft Teams

(01:02:25) 9: Cookie Crumbles

(01:11:36) 10: EPP Server Takeover

Episode 59: Bug Bounty Gadget Hunting & Hacker's Intuition Feb 22, 2024

Show notes

Episode 59: In this episode of Critical Thinking - Bug Bounty Podcast Justin and Joel discuss the concept of gadgets and how they can be used to escalate the impact of vulnerabilities. We talk through things like HTML injection, image injection, CRLF injection, web cache deception, leaking window location, self-stored XSS, and much more.

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:

------ Ways to Support CTBBPodcast ------

Hop on the CTBB Discord at https://ctbb.show/discord!

We also do Discord subs at $25, $10, $5 - premium subscribers get access to private masterclasses, exploits, tools, scripts, un-redacted bug reports, etc.

Resources:

Even Better

NahamSec's 5 Week Program

NahamCon News

CSS Injection Research

Timestamps:

(00:00:00) Introduction

(00:03:31) Caido's New Features

(00:15:20) Nahamcon News and 5 week Bootcamp and pentest opportunity

(00:19:54) HTML Injection, CSS Injection, and Clickjacking

(00:33:11) Image Injection

(00:37:19) Open Redirects, Client-side path traversal, and Client-side Open Redirect

(00:49:51) Leaking window.location.href

(00:57:15) Cookie refresh gadget

(01:01:40) Stored XXS

(01:09:01) CRLF Injection

(01:13:24) 'A Place To Stand' in GraphQL and ID Oracle

(01:18:23) Auth gadgets, Web Cache Deception, & LocalStorage poisoning

(01:27:46) Cookie Injection & Context Breaks

Episode 58: Youssef Sammouda - Client-Side & ATO War Stories Feb 15, 2024

Show notes

Episode 58: In this episode of Critical Thinking - Bug Bounty Podcast we finally sit down with Youssef Samouda and grill him on his various techniques for finding and exploiting client-side bugs and postMessage vulnerabilities. He shares some crazy stories about race conditions, exploiting hash change events, and leveraging scroll to text fragments.

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

------ Ways to Support CTBBPodcast ------

Hop on the CTBB Discord at https://ctbb.show/discord!

We also do Discord subs at $25, $10, $5 - premium subscribers get access to private masterclasses, exploits, tools, scripts, un-redacted bug reports, etc.

Today’s Guest: https://twitter.com/samm0uda?lang=en

https://ysamm.com/

Resources:

Client-side race conditions with postMessage:

https://ysamm.com/?p=742

Transferable Objects

https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Transferable_objects

Every known way to get references to windows, in javascript:

https://bluepnume.medium.com/every-known-way-to-get-references-to-windows-in-javascript-223778bede2d

Youssef’s interview with BBRE

https://www.youtube.com/watch?v=MXH1HqTFNm0

Timestamps:

(00:00:00) Introduction

(00:04:27) Client-side race conditions with postMessage

(00:18:12) On Hash Change Events and Scroll To Text Fragments

(00:32:00) Finding, documenting, and reporting complex bugs

(00:37:32) PostMessage Methodology

(00:45:05) Youssef's Vuln Story

(00:53:42) Where and how to look for ATO vulns

(01:05:21) MessagePort

(01:14:37) Window frame relationships

(01:20:24) Recon and JS monitoring

(01:37:03) Client-side routing

(01:48:05) MITMProxy

Episode 57: Technical breakdown from Miami Hacking Event - H1-305 Feb 08, 2024

Show notes

Episode 57: In this episode of Critical Thinking - Bug Bounty Podcast, Justin and Joel are live from Miami, and recap their experience and share takeaways from the live hacking event. They highlight the importance of paying attention to client-side routing and the growing bug class of client-side path traversal. They also discuss the challenges of knowing when to cut your losses and the value of tracking time and setting goals.

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

------ Ways to Support CTBBPodcast ------

Hop on the CTBB Discord at https://ctbb.show/discord!

We also do Discord subs at $25, $10, $5 - premium subscribers get access to private masterclasses, exploits, tools, scripts, un-redacted bug reports, etc.

Timestamps:

(00:00:00) Introduction

(00:03:50) Miami LHE Recap and Takeaways

(00:05:57) Keeping time and cutting losses.

(00:19:07) Roles and Goals

(00:23:33) OAuth

(00:28:52) HTML5 image to img Tip

Episode 56: Using Data Science to win Bug Bounty - Mayonaise (aka Jon Colston) Feb 01, 2024

Show notes

Episode 56: Using Data Science to win Bug Bounty - Mayonaise (aka Jon Colston)

Episode 56: In this episode of Critical Thinking - Bug Bounty Podcast, Justin sits down with Jon Colston to discuss how his background in digital marketing and data science has influenced his hunting methodology. We dive into subjects like data sources, automation, working backwards from vulnerabilities, applying conversion funnels to bug bounty, and the mayonaise signature 'Mother of All Bugs'

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

------ Ways to Support CTBBPodcast ------

WordFence - Sign up as a researcher! https://ctbb.show/wf

Hop on the CTBB Discord at https://ctbb.show/discord!

We also do Discord subs at $25, $10, $5 - premium subscribers get access to private masterclasses, exploits, tools, scripts, un-redacted bug reports, etc.

Today’s Guest:

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

Timestamps:

(00:00:00) Introduction

(00:12:07) Evolving Hacking Methodologies & B2B Hacking

(00:23:57) Data Science + Bug Bounty

(00:34:37) 'Lead Generation for Vulns'

(00:41:39) Ingredients and Recipes

(00:49:45) Keyword Categorization

(00:54:30) Manual Processes and Recap

(01:07:08) Data Sources

(01:19:59) Digital Marketing + Bug Bounty