TL;DR Combining response-type switching, invalid state and redirect-uri quirks using OAuth, with third-party javascript-inclusions has multiple vulnerable scenarios where authorization codes or tokens could leak to an attacker. This could be used in attacks for single-click account takeovers. Frans Rosén, Security Advisor at Detectify goes through three different scenarios found in the wild below.
CloudKit, the data storage framework by Apple, has various access controls. These access controls could be misconfigured, even by Apple themselves, which affected Apple’s own apps using CloudKit. This blog post explains in detail three bugs found in iCrowd+, Apple News and Apple Shortcuts with different criticality uncovered by Frans Rosen while hacking Cloudkit. All bugs were reported to and fixed by the Apple Security Bounty program.
tl;dr Detectify Crowdsource found some interesting middleware misconfigurations and potential exploits that, if left unchecked, leaves your web applications vulnerable to attack. Last year, Detectify’s …
Some hosting providers implemented http-01 having one part of the challenge key reflected in the response. This resulted in a huge amount of websites being vulnerable to XSS just because of their quirky implementation of the http-01 ACME-challenge.
TL;DR Bucket upload policies are a convenient way to upload data to a bucket directly from the client. Going through the rules in upload policies and the logic related to some file-access scenarios we show how full bucket object listings were exposed with the ability to also modify or delete existing files in the bucket.
TL;DR The Facebook malware that spread last week was dissected in a collaboration with Kaspersky Labs and Detectify. We were able to get help from the involved companies and cloud services to quickly shut down parts of the attack to mitigate it as fast as possible.
TL;DR: Setting up access control of AWS S3 consists of multiple levels each with its own unique risk of misconfiguration. We will go through the specifics of each level and identify the dangerous cases where weak ACLs can create vulnerable configurations impacting the owner of the S3-bucket and/or through third party assets used by a lot of companies. We also show how to do it properly and how to monitor for these sorts of issues.
BountyDash was created by @fransrosen and @avlidienbrunn to create a better overview of your bug bounty rewards. By tagging all your reports in the tool you’re also able to categorize all vulnerability types, plotting up a graph around your activity cross platforms and get forecasts around your future findings. Everything runs locally and there are import scripts you can run to fetch the data from each platform.