Black Cat Security

Fuzzing para-virtualized devices in Hyper-V

Introduction Introduction Hyper-V is the backbone of Azure, running on its Hosts to provide efficient and fair sharing of resources, but also isolation. That’s why we, in the vulnerability research team for Windows, have been working in the background for years now helping secure Hyper-V. And why Microsoft invites security researchers across the globe to submit their vulnerabilities through the Hyper-V Bounty Program for payment of up to $250,000 USD.

Microsoft’s Cyber Defense Operations Center shares best practices

Today, a single breach, physical or virtual, can cause millions of dollars of damage to an organization and potentially billions in financial losses to the global economy. Each week seems to bring a new disclosure of a cybersecurity breach somewhere in the world. As we look at the current state of cybersecurity challenges today, we see the same types of attacks, but the sophistication and scope of each attack continues to grow and evolve.

Announcing the Microsoft Azure DevOps Bounty program

The Microsoft Security Response Center (MSRC) is pleased to announce the launch of the Azure DevOps Bounty program, a program dedicated to providing rock-solid security for our DevOps customers. Starting January 17, 2019, we’re excited to offer rewards up to US$20,000 for eligible vulnerabilities in Azure DevOps online services and the latest release of Azure DevOps server.

January 2019 Security Update Release

Today, we released security updates to provide additional protections against malicious attackers. As a best practice, we encourage customers to turn on automatic updates.
More information about this month’s security updates can be found on the Security Update Guide.

December 2018 Security Update Release

Today, we released a security update for Internet Explorer after receiving a report from Google about a new vulnerability being used in targeted attacks.
Customers who have Windows Update enabled and have applied the latest security updates, are protected automatically. We encourage customers to turn on automatic updates.
Microsoft would like to thank Google for their assistance.

December 2018 Security Update Release

Today, we released security updates to provide additional protections against malicious attackers. As a best practice, we encourage customers to turn on automatic updates. More information about this month’s security updates can be found on the Security Update Guide.

First Steps in Hyper-V Research

Microsoft has put a lot of effort in Hyper-V security. Hyper-V, and the whole virtualization stack, runs at the core of many of our products: cloud computing, Windows Defender Application Guard, and technology built on top of Virtualization Based Security (VBS). Because Hyper-V is critical to so much of what we do, we want to encourage researchers to study it and tell us about the vulnerabilities they find: we even offer a $250K bounty for those who do.