Vulnerability research

In this first episode, I’ll do a brief introduction on how Apache HTTP works, and I’ll give you some insights into custom mutators and how they can be applied to the HTTP protocol effectively.

Last year at GitHub Universe, we introduced the GitHub Security Lab, which is committed to contributing resources, tooling, bounties, and security research to secure the open source ecosystem. We know…

Aimed at developers, in this series we introduce and explore the memory unsafe attack surface of interpreted languages.

This blog describes a security vulnerability in the infrastructure that supports Germany’s COVID-19 contact tracing efforts. The mobile (Android/iOS) apps are not affected by the vulnerability and do not collect and/or transmit any personal data other than the device’s IP address. The infrastructure takes active measures to disassociate true positives from client IP addresses.

Ubuntu 20.04 local privilege escalation using vulnerabilities in gdm3 and accountsservice (CVE-2020-16125, CVE-2020-16126, CVE-2020-16127)

In this post I’ll give details about how to exploit CVE-2020-6449, a use-after-free (UAF) in the WebAudio module of Chrome that I discovered in March 2020. I’ll give an outline of the general strategy to exploit this type of UAF to achieve a sandboxed RCE in Chrome by a single click (and perhaps a 2 minute wait) on a malicious website.

Security is a complex area. One software component may break the assumptions made by another component and it is not always clear who should fix the code to remediate the security implications.

Aimed at developers, in this series we introduce and explore the memory unsafe attack surface of interpreted languages.

In this post I’ll show how input validation which should be used to prevent malformed inputs to enter our applications, open up the doors to Remote Code Execution (RCE).

This post details how an open source supply chain malware spread through build artifacts. 26 open source projects were backdoored by this malware and were actively serving backdoored code.

Saying thanks is now a core part of the Security Advisory workflow.

We examine the dangers of network integer arithmetic based on a case study of security vulnerabilities reported to the ntop project.

Join our Capture the Flag challenge to use your CodeQL skills or learn new ones.

In this post I’ll show how garbage collections (GC) in Chrome may be triggered with small memory allocations in unexpected places, which was then used to cause a use-after-free bug.

A phishing campaign targeting our customers lures GitHub users into providing their credentials (including two-factor authentication codes). Learn more about the threat and what you can do to protect yourself.