Exploring a New Class of Kernel Exploit Primitive

The security landscape is dynamic, changing often and as a result, attack surfaces evolve. MSRC receives a wide variety of cases spanning different products, bug types and exploit primitives. One particularly interesting primitive we see is an arbitrary kernel pointer read. These often happen when kernel mode code does not validate that pointers read from …

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Guidance for CVE-2022-23278 spoofing in Microsoft Defender for Endpoint

Microsoft released a security update to address CVE-2022-23278 in Microsoft Defender for Endpoint. This important class spoofing vulnerability impacts all platforms. We wish to thank Falcon Force for the collaboration on addressing this issue through coordinated vulnerability disclosure. Cybercriminals are looking for any opening to tamper with security protections in order to blind, confuse, or …

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Disclosure of Vulnerability in Azure Automation Managed Identity Tokens

On December 10, 2021, Microsoft mitigated a vulnerability in the Azure Automation service. Azure Automation accounts that used Managed Identities tokens for authorization and an Azure Sandbox for job runtime and execution were exposed. Microsoft has not detected evidence of misuse of tokens. Microsoft has notified customers with affected Automation accounts. Microsoft recommends following the …

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Cyber threat activity in Ukraine: analysis and resources

UPDATE 27 Apr 2022: See Updated malware details and Microsoft security product detections below as discussed in the Special Report: Ukraine. UPDATE 02 MAR 2022: See Updated malware details and Microsoft security product detections below for additional insights and protections specific to the evolving threats we have identified impacting organizations with ties to Ukraine. Microsoft …

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Researcher Spotlight: Cyber Viking Nate Warfield is Here to Help

“There are few jobs where I can say, I make two billion people more secure on the internet every single day.” Childhood Look: Goth kid, all in black Current Look: Cyber Viking Childhood hobby: Head banging to Metallica, Marilyn Manson, and Guns N’ Roses Current hobby: n0x08 DJ’s Live events around the world. Check him …

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Congratulations to the Top MSRC 2021 Q4 Security Researchers!

Congratulations to all the researchers recognized in this quarter’s Microsoft Researcher Recognition Program leaderboard! Thank you to everyone for your hard work and continued partnership to secure customers. The top three researchers of the 2021 Q4 Security Researcher Leaderboard are: rezer0dai (780 points), Callum Carney (750 points), and wtm (615 points)! In addition to our regular leaderboard, we …

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Expanding the Microsoft Researcher Recognition Program

The Microsoft Researcher Recognition Program offers public thanks and recognition to security researchers who help protect our customers through discovering and sharing security vulnerabilities under Coordinated Vulnerability Disclosure. Today, we are expanding the program to recognize more security researchers in more ways for their contributions to protecting customers, and we published the first new leaderboard …

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An Armful of CHERIs

Today, Arm announced that the first silicon supporting the Morello prototype architecture, a research project led by Arm, Microsoft, University of Cambridge and others, is now available on a limited run of demonstration boards, which are being shipped from today to industry partners for testing. Morello is the first high-performance implementation of the CHERI extensions. …

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Coming Soon: New Security Update Guide Notification System

Sharing information through the Security Update Guide is an important part of our ongoing effort to help customers manage security risks and keep systems protected. Based on your feedback we have been working to make signing up for and receiving Security Update Guide notifications easier. We are excited to share that starting today, you can …

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Azure App Service Linux source repository exposure

MSRC was informed by Wiz.io, a cloud security vendor, under Coordinated Vulnerability Disclosure (CVD) of an issue where customers can unintentionally configure the .git folder to be created in the content root, which would put them at risk for information disclosure. This, when combined with an application configured to serve static content, makes it possible …

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