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Security — Curbing Connection Churn in Zuul - Netflix TechBlog

Curbing Connection Churn in Zuul - Netflix TechBlog

When Zuul was designed and developed, there was an inherent assumption that connections were effectively free, given we weren’t using mutual TLS (mTLS). It’s built on top of Netty, using event loops…

NTNetflix TechBlog·August 16, 2023Security
Security — Hardening repositories against credential theft

Hardening repositories against credential theft

Some best practices and important defenses to prevent common attacks against GitHub Actions that are enabled by stolen personal access tokens, compromised accounts, or compromised GitHub sessions.

MMMatthew MasarikMatthew Masarik·August 15, 2023Security
Security — How Meta is improving password security and preserving privacy

How Meta is improving password security and preserving privacy

Meta is developing new privacy-enhancing technologies (PETs) to innovate and solve problems with less data. These technologies enable teams to build and launch privacy-enhanced products in a way that’s verifiable and safeguards user data. Using state-of-the-art cryptographic techniques, we have developed Private Data Lookup (PDL) that allows users to privately query a server-side data set. […] Rea

MEMeta Engineering·August 8, 2023Security
Security — DDoS threat report for 2023 Q2

DDoS threat report for 2023 Q2

Q2 2023 saw an unprecedented escalation in DDoS attack sophistication. Pro-Russian hacktivists REvil, Killnet and Anonymous Sudan joined forces to attack Western sites. Mitel vulnerability exploits surged by a whopping 532%, and attacks on crypto rocketed up by 600%.

OJOmer, JorgeOmer, Jorge·July 18, 2023Security
Security — GitHub achieves ISO/IEC 27701:2019, 27018:2019, and CSA STAR certifications

GitHub achieves ISO/IEC 27701:2019, 27018:2019, and CSA STAR certifications

GitHub’s Information Security and Privacy Management System (ISPMS) has been certified against ISO/IEC 27701:2019 (PII Processor) and 27018:2019 standards, as well as the Cloud Controls Matrix (CCM). These standards and frameworks are internationally recognized for security and privacy program best practices.

BGBrandon Griffeth, Glory FranckeBrandon Griffeth, Glory Francke·July 5, 2023Security
Security — Introduction to SELinux

Introduction to SELinux

SELinux is the most popular Linux Security Module used to isolate and protect system components from one another. Learn about different access control systems and Linux security as I introduce the foundations of a popular type system.

KSKevin StubbingsKevin Stubbings·July 5, 2023Security
Security — GitHub’s revamped VIP Bug Bounty Program

GitHub’s revamped VIP Bug Bounty Program

GitHub’s VIP Bug Bounty Program has been updated to include a clear and accessible criteria for receiving an invitation to the program and more. Learn more about the program and how you can become a Hacktocat, and join our community of researchers who are contributing to GitHub’s security with fun perks and access to staff and beta features!

JGJeff GuerraJeff Guerra·June 12, 2023Security
Security — Rooting with root cause: finding a variant of a Project Zero bug

Rooting with root cause: finding a variant of a Project Zero bug

In this blog, I’ll look at CVE-2022-46395, a variant of CVE-2022-36449 (Project Zero issue 2327), and use it to gain arbitrary kernel code execution and root privileges from the untrusted app domain on an Android phone that uses the Arm Mali GPU. I’ll also explain how root cause analysis of CVE-2022-36449 led to the discovery of CVE-2022-46395.

MYMan Yue MoMan Yue Mo·May 25, 2023Security
Security — What is ReDoS, and how do you fix it?

What is ReDoS, and how do you fix it?

Code scanning detects ReDoS vulnerabilities automatically, but fixing them isn’t always easy. This blog post describes a 4-step strategy for fixing ReDoS bugs.

KBKevin BackhouseKevin Backhouse·May 9, 2023Security
Security — The malware threat landscape: NodeStealer, DuckTail, and more

The malware threat landscape: NodeStealer, DuckTail, and more

We’re sharing our latest threat research and technical analysis into persistent malware campaigns targeting businesses across the internet, including threat indicators to help raise our industry’s collective defenses across the internet. These malware families – including Ducktail, NodeStealer and newer malware posing as ChatGPT and other similar tools– targeted people through malicious browser ex

MEMeta Engineering·May 3, 2023Security
Security — SLP: a new DDoS amplification vector in the wild

SLP: a new DDoS amplification vector in the wild

Researchers have recently published the discovery of a new DDoS reflection/amplification attack vector leveraging the SLP protocol. Cloudflare expects the prevalence of SLP-based DDoS attacks to rise in the coming weeks

AFAlex Forster, OmerAlex Forster, Omer·April 25, 2023Security
Security — DDoS threat report for 2023 Q1

DDoS threat report for 2023 Q1

Threat actors kicked off 2023 with a bang. The start of the year was characterized by a series of hacktivist campaigns against Western targets, and record-breaking hyper volumetric attacks

OJOmer, JorgeOmer, Jorge·April 11, 2023Security
Security — Pwning Pixel 6 with a leftover patch

Pwning Pixel 6 with a leftover patch

In this post, I’ll look at a security-related change in version r40p0 of the Arm Mali driver that was AWOL in the January update of the Pixel bulletin, where other patches from r40p0 was applied, and how these two lines of changes can be exploited to gain arbitrary kernel code execution and root from a malicious app. This highlights how treacherous it can be when backporting security changes.

MYMan Yue MoMan Yue Mo·April 6, 2023Security
Security — Build a secure code mindset with the GitHub Secure Code Game

Build a secure code mindset with the GitHub Secure Code Game

Writing secure code is as much of an art as writing functional code, and it is the only way to write quality code. Learn how our Secure Code Game can provide you with hands-on training to spot and fix security issues in your code so that you can build a secure code mindset.

JKJoseph KatsioloudesJoseph Katsioloudes·March 23, 2023Security
Security — The state of application security in 2023

The state of application security in 2023

One year ago we published our first Application Security Report. For Security Week 2023, we are providing updated insights and trends around mitigated traffic, bot and API traffic, and account takeover attacks.

MTMichael Tremante, David BelsonMichael Tremante, David Belson·March 14, 2023Security