Mitigating SSRF Vulnerabilities Impacting Azure Machine Learning

Summary On May 9, 2024, Microsoft successfully addressed multiple vulnerabilities within the Azure Machine Learning AML service, which were initially discovered by security research firms Wiz and Tenable. These vulnerabilities, which included Server-Side Request Forgeries SSRF and a path traversa...

Updating our Vulnerability Severity Classification for AI Systems

The Microsoft Security Response Center MSRC is always looking for ways to provide clarity and transparency around how we assess the impact of vulnerabilities reported in our products and services. To this end, we are announcing the Microsoft Vulnerability Severity Classification for AI Systems, a...

From Bounty Leaderboards to Microsoft Security Researcher, Meet Cameron Vincent!

Fun Facts: Game you binged: Guitar Hero and Rock Band fanatic. Go to snack: Nutri-Grain Bars. Favorite Drink: Soda – Coca Cola specifically. Favorite Place: Singapore – stayed an extra week after a hacking collaboration and truly fell in love and hopes to get back as soon as possible. Favorite...

Potential Risk of Privilege Escalation in Azure AD Applications

Summary Microsoft has developed mitigations for an insecure anti-pattern used in Azure AD AAD applications highlighted by Descope, and reported to Microsoft, where use of the email claim from access tokens for authorization can lead to an escalation of privilege. An attacker can falsify the email...

Best practices regarding Azure Storage Keys, Azure Functions, and Azure Role Based Access

Summary Summary Azure provides developers and security operations staff a wide array of configurable security options to meet organizational needs. Throughout the software development lifecycle, it is important for customers to understand the shared responsibility model, as well as be familiar wi...

Azure ADを使用するマルチテナント アプリケーションの承認に関する構成ミスの可能性に関するガイダンス

本ブログは、Guidance on Potential Misconfiguration of Authorization of Multi-Tenant Applications that use Azure AD の抄訳版です。最新の情報は原文を参照してください...

セキュリティ更新プログラムガイド CVRF API での CBL-Mariner CVE の 公開について

本ブログは、Publishing CBL-Mariner CVEs on the Security Update Guide CVRF API の抄訳版です。最新の情報は原文を参照してください。...

Defense-in-Depth Updates for Azure Identity libraries and Azure Key Vault libraries within Azure SDK plus Best Practice Implementation Guidance

Summary Today, Microsoft released new versions of the Azure Key Vault libraries and Azure Identity libraries as part of the Azure Software Development Kit SDK that includes defense-in-depth feature improvements. We also published best practice guidance to help protect applications and services th...

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...

We’re Excited to Announce the Launch of Comms Hub!

We are excited to announce the launch of Comms Hub to the Researcher Portal submission experience! With this launch, security researchers will be able to streamline communication with MSRC case SPMs case managers, attach additional files, track case and bug bounty status all in the Researcher...

Improved Guidance for Azure Network Service Tags

Summary Microsoft Security Response Center MSRC was notified in January 2024 by our industry partner, Tenable Inc., about the potential for cross-tenant access to web resources using the service tags feature. Microsoft acknowledged that Tenable provided a valuable contribution to the Azure...

Update on Microsoft Actions Following Attack by Nation State Actor Midnight Blizzard

This blog provides an update on the nation-state attack that was detected by the Microsoft Security Team on January 12, 2024. As we shared, on January 19, the security team detected this attack on our corporate email systems and immediately activated our response process. The Microsoft Threat...

Microsoft guidance regarding credentials leaked to GitHub Actions Logs through Azure CLI

Summary The Microsoft Security Response Center MSRC was made aware of a vulnerability where Azure Command-Line Interface CLI could expose sensitive information, including credentials, through GitHub Actions logs. The researcher, from Palo Alto Networks Prisma Cloud, found that Azure CLI commands...

Journey Down Under: How Rocco Became Australia’s Premier Hacker

Fun facts about Rocco Calvi @TecR0c: Microsoft MVR: Rocco is a 2023 Microsoft Most Valuable Researcher. Fitness fanatic: Inspired by old-school body building and countless hours of chopping and carrying wood in the mountains during his youth, Rocco remains a fitness enthusiast, setting himself...

Congratulations to the MSRC 2023 Most Valuable Security Researchers!

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 excited to recognize this year’s top 100 Most...

マイクロソフトは、Azure Bastion と Azure Container Registry におけるクロスサイトスクリプティング（XSS）脆弱性を緩和しました。

本ブログは、Microsoft mitigates set of cross-site scripting XSS vulnerabilities in Azure Bastion and Azure Container Registryの抄訳版です。最新の情報は原...

Microsoft Vulnerability Severity Classification for Online Services Publication

The Microsoft Security Response Center MSRC is always looking for ways to provide clarity and transparency around how we assess the impact of vulnerabilities reported in our products and services. We have published a new Microsoft Vulnerability Severity Classification for Online Services to provi...

Configuring host-level audit logging for AKS VMSS

This blog post runs you through how to enable and configure Linux audit logging on your Azure Kubernetes Service AKS Virtual Machine Scale Set VMSS using the Linux auditing subsystem, also known as auditd. Warning The information provided below is accurate as of the release date of this blog post...

新しい MSRCのブログサイト

2023 年 2 月 9 日 米国時間 から MSRC のブログサイトが新しくなりました。 2023 年 2 月 9 日 米国時間 以降は https://msrc.microsoft.com/blog をご...

Microsoft Investigation – Threat actor consent phishing campaign abusing the verified publisher process

Summary On December 15th, 2022, Microsoft became aware of a consent phishing campaign involving threat actors fraudulently impersonating legitimate companies when enrolling in the Microsoft Cloud Partner Program MCPP formerly known as Microsoft Partner Network MPN. The actor used fraudulent partn...

Security Update Guide Improvement – Representing Hotpatch Updates

Today we are updating the way Microsoft Security Update Guide SUG represents the Windows Hotpatch feature to make it easier for users to identify the hotpatch and security updates. Hotpatching was introduced a year ago as a new way to install updates on supported Windows Server Azure Edition...

CVE-2022-23278 Microsoft Defender for Endpointのなりますましの脆弱性に関するガイダンス

本ブログは、Guidance for CVE-2022-23278 spoofing in Microsoft Defender for Endpoint の抄訳版です。最新の情報は原文を参照してください。 マイク...

Guidance for Azure Active Directory (AD) keyCredential property Information Disclosure in Application and Service Principal APIs

Microsoft recently mitigated an information disclosure issue, CVE-2021-42306, to prevent private key data from being stored by some Azure services in the keyCredentialsproperty of an Azure Active Directory Azure AD Applicationand/or Service Principal, and prevent reading of private key data...

Power Platform is Here! Introducing the Dynamics 365 and Power Platform Bug Bounty Program

Microsoft is excited to announce the addition of Power Platform to the newly rebranded Dynamics 365 and Power Platform Bounty Program. Through this expanded program, we encourage researchers to discover and report high impact security vulnerabilities they may find in the new Power Platform scope ...

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...

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...

February 2020 security updates are available

We have released the February 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 in the Security Update Guide. The post February...

2018 年 11 月のセキュリティ更新プログラム (月例)

2019/2/14 更新: お知らせ Microsoft Dynamics 365 の脆弱性 CVE-2018-8654 の詳細ページを公開しました。脆弱性に対応するための更新プログラム...

Analysis and mitigation of speculative store bypass (CVE-2018-3639)

In January, 2018, Microsoft published an advisory and security updates for a new class of hardware vulnerabilities involving speculative execution side channels known as Spectre and Meltdown. In this blog post, we will provide a technical analysis of an additional subclass of speculative executio...

The MSRC 2017 list of “Top 100” security researchers

Security researchers play an essential role in Microsoft’s security strategy and are key to community-based defense. To show our appreciation for their hard work and partnership, each year at BlackHat North America, the Microsoft Security Response Center highlights contributions of these...

Announcing BlueHat 2024: Call for Papers now open

The 23rd edition of Microsoft’s BlueHat security conference will be hosted by the Microsoft Security Response Center MSRC at the Redmond, WA corporate campus, October 29 and 30, 2024. BlueHat brings together security researchers and responders from both inside and outside of Microsoft, who come...

Congratulations to the Top MSRC 2023 Q2 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 2023 Q2 Security Researcher Leaderboard are: Yuki Chen...

2023 年 4 月のセキュリティ更新プログラム (月例)

2023 年 4 月 11 日 米国時間 、マイクロソフトは、マイクロソフト製品に影響する脆弱性を修正するために、セキ...

Congratulations to the Top MSRC 2022 Q3 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 2022 Q3 Security Researcher Leaderboard are: Zhiyi...

Investigation Regarding Misconfigured Microsoft Storage Location

October 28, 2022 update:Added a Customer FAQ section. Summary Security researchers at SOCRadar informed Microsoft on September 24, 2022, of a misconfigured Microsoft endpoint. This misconfiguration resulted in the potential for unauthenticated access to some business transaction data correspondin...

Congratulations to the MSRC 2022 Most Valuable Researchers!

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 excited to recognize this year’s top 100 Most...

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...

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...

Researcher Spotlight: Dr. Nestori Syynimaa’s Constant Mission Protecting Identities

"When you find the things I find, they really matter. They affect everybody’s security.” Currently streaming: The Expanse and Lost in Space on Netflix Currently listening to: Amorphis, Architects, and Killswitch Engage Currently running: 130 kilometers or 80 miles a month Currently playing:...

New High Impact Scenarios and Awards for the Azure Bounty Program

Microsoft is excited to announce new Azure Bounty Program awards up to $60,000 to encourage and reward vulnerability research focused on the highest potential impact to customer security. These increased awards are a part of our ongoing investment in partnership with the security research...

Congratulations to the MSRC’s 2020 Most Valuable Security Researchers

Today we announce our Most Valuable Security Researchers for 2020! The MSRC Researcher Recognition program is an integral aspect of recognizing the ongoing partnerships with our community of talented security researchers who report through Coordinated Vulnerability Disclosure CVD. These...

Top MSRC 2020 Q2 Security Researchers Announced – Congratulations!

We are excited to announce the top contributing researchers for the 2020 Second Quarter Q2! Congratulations to all the researchers who continue to rock the leaderboard, and a big thank you to everyone for your contribution to securing our customers and the ecosystem. The top three researchers of...

Congratulations to the top MSRC 2025 Q2 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 2025 Q2 Security Researcher Leaderboard are wkai, Brad...

Announcing the BlueHat 2024 Sessions

34 sessions from 54 presenters representing 20 organizations! We are thrilled to reveal the lineup of speakers and presentations for the 23rd BlueHat Security Conference, in Redmond WA from Oct 29-30. This year's conference continues the BlueHat ethos and Secure Future Initiative mission of...

Microsoft Response to Layer 7 Distributed Denial of Service (DDoS) Attacks

Summary Summary Beginning in early June 2023, Microsoft identified surges in traffic against some services that temporarily impacted availability. Microsoft promptly opened an investigation and subsequently began tracking ongoing DDoS activity by the threat actor that Microsoft tracks as...

Congratulations to the Top MSRC 2023 Q1 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 2023 Q1 Security Researcher Leaderboard are: Kai Lu...

Azure Storage Keys、Azure Functions、Azure Role Based Access に関するベスト プラクティス

本ブログは、Best practices regarding Azure Storage Keys, Azure Functions, and Azure Role Based Access の抄訳版です。最新の情報は原文を参照してください。 概要 概...

First steps in CHERIoT Security Research

At Microsoft, we invest a lot of time researching and investigating possibilities in our journey to memory safety. Because the massive majority of existing codebases are written in unsafe programming languages, the task of protecting legacy code is very important. Hardware solutions are an...

Microsoft の調査 – 検証済みの発行者確認を悪用する脅威アクターの同意フィッシング キャンペーンについて

本ブログは、Microsoft Investigation – Threat actor consent phishing campaign abusing the verified publisher process の抄訳版です。最新の情報は原文を参照してくださ...

マイクロソフト 機械学習 メンバーシップ推論コンペティション (MICO) の発表

本ブログは、Announcing the Microsoft Machine Learning Membership Inference Competition MICOの抄訳版です。最新の情報は原文を参照してく...