In this post I’ll exploit CVE-2023-4069, a type confusion vulnerability that I reported in July 2023. The vulnerability—which allows remote code execution (RCE) in the renderer sandbox of Chrome by a single visit to a malicious site—is found in v8, the Javascript engine of Chrome. It was filed as bug 1465326 and subsequently fixed in […]
Today, in coordination with Ilya Lipnitskiy (the maintainer of libcue) and the distros mailing list, the GitHub Security Lab is disclosing CVE-2023-43641, a memory corruption vulnerability in libcue. We have also sent a text-only version of this blog post to the oss-security list. It’s quite likely that you have never heard of libcue before, and […]
At GitHub, we launched secret scanning with the mission of eliminating all credential leaks. In support of this mission, this year we’ve made secret scanning and secret scanning push protection free on public repositories to help open source users detect and prevent secret leaks. We also shipped push protection metrics for GitHub Advanced Security customers […]
As GitHub’s Chief Security Officer and SVP of Engineering, one of the most common discussions I have with other engineering and security leaders is the state of supply chain security. We all know it’s been an interesting few years, and supply chain security has rocketed into the mainstream—but where should one start when it comes […]
In this post, I’ll explain how to exploit CVE-2023-3420, a type confusion vulnerability in v8 (the Javascript engine of Chrome), that I reported in June 2023 as bug 1452137. The bug was fixed in version 114.0.5735.198/199. It allows remote code execution (RCE) in the renderer sandbox of Chrome by a single visit to a malicious […]
As we kick off Cybersecurity Awareness Month, the GitHub bug bounty team is excited to spotlight one of the top performing security researchers who participates in the GitHub Security Bug Bounty Program, @inspector-ambitious! As home to over 100 million developers and 372 million repositories, GitHub maintains a strong dedication to ensuring the security and reliability […]
Although X.509 certificates have been here for a while, they have become more popular for client authentication in zero-trust networks in recent years. Mutual TLS, or authentication based on X.509 certificates in general, brings advantages compared to passwords or tokens, but you get increased complexity in return. In this post, I’ll deep dive into some […]
When the next Log4j lands, you don’t want to find out that you’re several versions behind, and that it’s going to take the team days to fix all of the breaking changes. Dependabot version updates automate the patching process, giving you a measure of protection from unwelcome surprises. But just as with any inbox, the […]
AI is fundamentally changing the technology and security landscape. At GitHub, we see AI as a way for developers to both speed up their development process and simultaneously write more secure code. For instance, GitHub Copilot includes a security filter that targets the most common vulnerable coding patterns in Python and JavaScript–including hardcoded credentials, SQL […]
Since the May beta release of our GitHub-curated Dependabot policies that detect and close false positive alerts, over 250k repositories have manually opted in, with an average improvement of over 1 in 10 alerts. The impact so far: auto-dismissal of millions of alerts that would have otherwise demanded a developer’s attention to manually assess and […]
