YoKo Kho

Category: Web Apps

Collection of the bug that specifically found at web application

Optimizing Hunting Results in VDP for use in Bug Bounty Programs - From Sensitive Information Disclosure to Accessing Hidden APIs which can be used to Retrieve Customer Data

A story when Allah willed me to tried to optimize my findings in the Points-Only program to be able to get 6 paid P1 issues in...

November 15, 2020

Bug Report / Web Apps / Write-Up

From Recon to Bypassing MFA Implementation in OWA by Using EWS Misconfiguration

A story about how I Finally could use an AD account that unenrolled to MFA, by using an EWS Misconfiguration to Access Email Inbox and (Having...

June 19, 2020

Intercept Server Responses Feature on Burpsuite

Bug Report / Web Apps / Write-Up

From 3,99 to 1,650 USD (Part I) – Simple Vertical Privilege Escalation by Changing HTTP Response

A story about how I got several simple bugs (1 P2, 1 P3, and 2 P4s) on a target (that just allow Specific Country Code to...

June 6, 2020

Bug Report / Web Apps / Write-Up

From Recon to Optimizing RCE Results – Simple Story with One of the Biggest ICT Company in the World

How I Finally could Got into an Internal Network (and could accessing all of their internal assets) at One of the Biggest ICT company in the...

February 19, 2020

Bug Report / Web Apps / Write-Up

Race Condition that could Result to RCE – (A story with an App that temporary stored an uploaded file within 2 seconds before moving it to Amazon S3)

In the name of Allah, the Most Gracious, the Most Merciful. – Part I from (hopefully) IV Parts – Update I: Added a “Reference” Section. Update...

September 14, 2019

Bug Report / Web Apps / Write-Up

IDOR (at Private Bug Bounty Program) that could Leads to Personal Data Leaks

In the name of Allah, the Most Gracious, the Most Merciful. Please kindly visit this simple paper directly to looking this release in simple:[English Version] IDOR...

April 17, 2018

Bug Report / Web Apps / Write-Up

Ribose – IDOR with Simple CSRF Bypass – Unrestricted Changes and Deletion to other Photo Profile

In the name of Allah, the Most Gracious, the Most Merciful. Please kindly visit this simple paper directly to looking this release in simple:[English Version] Ribose — IDOR...

April 16, 2018

Bug Report / Web Apps / Write-Up

Bypassing the Current Password Protection at PayPal Tech-Support

In the name of Allah, the Most Gracious, the Most Merciful. Please kindly visit this simple paper directly to looking this release (December, 2017 Article):[English Version]...

December 26, 2017

Bug Report / Web Apps / Write-Up

Information Disclosure at PayPal and Xoom (PayPal Acquisition) via Simple Google Dork – 1,000 USD

In the name of Allah, the Most Gracious, the Most Merciful. Please kindly visit this simple paper directly to looking this release:[English Version] PayPal – Information...

December 26, 2017

Bug Report / Web Apps / Write-Up

Turning Self-XSS into non-Self Stored-XSS via Authorization Issue at “PayPal Tech-Support and Brand Central Portal”

In the name of Allah, the Most Gracious, the Most Merciful. Please kindly visit this simple paper directly to looking this release:[English Version] PayPal — Turning Self-XSS into...

November 12, 2017

Latest Tweets

Retweet on Twitter YoKo Kho Retweeted

hakluke @hakluke·

December 1, 2021

New blog post!

In this article I talk about exactly how each iteration of my bug bounty automation setups has worked (there have been 3!), and what I plan to build next.

If you’re interested in bug bounty automation I think you will love this article!

https://labs.detectify.com/2021/11/30/hakluke-creating-the-perfect-bug-bounty-automation/

Twitter 1466165267772293122

Retweet on Twitter YoKo Kho Retweeted

Grzegorz Tworek @0gtweet·

November 29, 2021

Finally had a moment to test Winlogon password leaking (a.k.a. notifying) on Windows 11. No big surprise.
And the flow is:
-user enters password
-winlogon loads mpnotify.exe
-mpnotify opens RPC channel
-winlogon sends pass via RPC
-mpnotify forwards to DLL
-DLL stores it on disk

Twitter 1465282548494487554

Retweet on Twitter YoKo Kho Retweeted

Grzegorz Tworek @0gtweet·

November 29, 2021

@0xBoku Four registry entries, and no reboot: https://github.com/gtworek/PSBits/tree/master/PasswordStealing/NPPSpy

Twitter 1465313342625656837

Retweet on Twitter YoKo Kho Retweeted

HolyBugx @HolyBugx·

November 28, 2021

Sometimes you need to be creative to bypass CORS mitigations and achieve a successful site-wide CSRF.

Here is an example:

Twitter 1464904818242338820

Retweet on Twitter YoKo Kho Retweeted

Philippe Harewood @phwd_·

August 19, 2021

Bypass Facebook SSL Pinning for iOS [2021]

https://github.com/phwd/fb-ios-pinning-2021/

Twitter 1428178635094122497

Category: Web Apps

Optimizing Hunting Results in VDP for use in Bug Bounty Programs - From Sensitive Information Disclosure to Accessing Hidden APIs which can be used to Retrieve Customer Data

From Recon to Bypassing MFA Implementation in OWA by Using EWS Misconfiguration

From 3,99 to 1,650 USD (Part I) – Simple Vertical Privilege Escalation by Changing HTTP Response

From Recon to Optimizing RCE Results – Simple Story with One of the Biggest ICT Company in the World

Race Condition that could Result to RCE – (A story with an App that temporary stored an uploaded file within 2 seconds before moving it to Amazon S3)

IDOR (at Private Bug Bounty Program) that could Leads to Personal Data Leaks

Ribose – IDOR with Simple CSRF Bypass – Unrestricted Changes and Deletion to other Photo Profile

Bypassing the Current Password Protection at PayPal Tech-Support

Information Disclosure at PayPal and Xoom (PayPal Acquisition) via Simple Google Dork – 1,000 USD

Turning Self-XSS into non-Self Stored-XSS via Authorization Issue at “PayPal Tech-Support and Brand Central Portal”

Search

Recent Posts

Categories

Latest Tweets