Customer Guidance on Recent Nation-State Cyber Attacks

Note: we are updating as the investigation continues. Revision history listed at the bottom. This post contains technical details about the methods of the actor we believe was involved in Recent Nation-State Cyber Attacks, with the goal to enable the broader security community to hunt for activity in their networks and contribute to a shared …

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Security Update Guide v2

Security Update Guide: Let’s keep the conversation going

Hi Folks,   We want to continue to highlight changes we’ve made to our Security Update Guide. We have received a lot of feedback, much of which has been very positive. We acknowledge there have been some stability problems and we are actively working through reports of older browsers not being able to run the new application. We really appreciate your feedback as we review these issues.  …

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Vulnerability Descriptions in the New Version of the Security Update Guide

With the launch of the new version of the Security Update Guide, Microsoft is demonstrating its commitment to industry standards by describing the vulnerabilities with the Common Vulnerability Scoring System (CVSS).  This is a precise method that describes the vulnerability with attributes such as the attack vector, the complexity of the attack, whether an adversary …

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Attacks exploiting Netlogon vulnerability (CVE-2020-1472)

Microsoft has received a small number of reports from customers and others about continued activity exploiting a vulnerability affecting the Netlogon protocol (CVE-2020-1472) which was previously addressed in security updates starting on August 11, 2020. If the original guidance is not applied, the vulnerability could allow an attacker to spoof a domain controller account that could be …

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Announcing the Top MSRC 2020 Q3 Security Researchers

Following the MSRC’s 2020 Most Valuable Security Researchers announced during this year’s Black Hat, we’re excited to announce the top contributing researchers for the 2020 Third Quarter (Q3)! The top three researchers of the 2020 Q3 Security Researcher Leaderboard are: David Dworken (1800 points), Cameron Vincent (1780 points), and Yuki Chen (1380 points). Congratulations to …

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Security Analysis of CHERI ISA

Is it possible to get to a state where memory safety issues would be deterministically mitigated? Our quest to mitigate memory corruption vulnerabilities led us to examine CHERI (Capability Hardware Enhanced RISC Instructions), which provides memory protection features against many exploited vulnerabilities, or in other words, an architectural solution that breaks exploits. We’ve looked at …

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Azure Sphere

Concluding the Azure Sphere Security Research Challenge, Microsoft Awards $374,300 to Global Security Research Community

The Azure Sphere Security Research Challenge brought together 70 researchers from 21 countries to help secure Azure Sphere customers and expand Microsoft’s partnerships with the global IoT security research community. During the three-month Azure Sphere Security Research Challenge, researchers surfaced 20 Critical or Important severity security vulnerabilities, with Microsoft awarding $374,300 in bounty awards for …

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Security Update Guide v2

New and improved Security Update Guide!

We’re excited to announce a significant update to the Security Update Guide, our one-stop site for information about all security updates provided by Microsoft. This new version will provide a more intuitive user experience to help protect our customers regardless of what Microsoft products or services they use in their environment. We’ve listened to your feedback and incorporated many …

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What to Expect When Reporting Vulnerabilities to Microsoft

At the Microsoft Security Response Center’s (MSRC), our primary mission is to help protect our customers. One of the ways we do this is by working with security researchers to discover security vulnerabilities in our services and products, and then making sure those that pose a threat to customers get fixed. Many researchers report these …

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Rusty construction shovel

Control Flow Guard for Clang/LLVM and Rust

As part of our ongoing efforts towards safer systems programming, we’re pleased to announce that Windows Control Flow Guard (CFG) support is now available in the Clang C/C++ compiler and Rust. What is Control Flow Guard? CFG is a platform security technology designed to enforce control flow integrity. It has been available since Windows 8.1 …

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