Why XSS still matters: MSRC’s perspective on a 25-year-old threat

Cross-Site Scripting XSS has been a known vulnerability class for two decades, yet it continues to surface in modern applications, including those built with the latest frameworks and cloud-native architectures. At Microsoft, we still receive a steady stream of XSS reports across our services, fr...

Securing AI and Cloud with the Zero Day Quest

Our security teams work around the clock to help protect every person and organization on the planet from security threats. We also know that security is a team sport, and that’s why we also partner with the global security community through our bug bounty programs to proactively identify and...

Toward greater transparency: Publishing machine-readable CSAF files

Welcome to the third installment in our series on transparency at the Microsoft Security Response Center MSRC. In this ongoing discussion, we talk about our commitment to providing comprehensive vulnerability information to our customers. At MSRC, our mission is to protect our customers,...

Congratulations to the MSRC 2024 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 100 Most...

New Security Advisory Tab Added to the Microsoft Security Update Guide

Today, we are adding a new Security Advisory tab to the Security Update Guide to meet our customers’ needs for a unified and authoritative source for the latest public information about Microsoft security updates and issues. We are continuously listening to feedback from users of the Security...

Microsoft mitigates Power Platform Custom Code information disclosure vulnerability

Summary On 30 March 2023, Tenable informed Microsoft under Coordinated Vulnerability Disclosure CVD of a security issue concerning Power Platform Custom Connectors using Custom Code. This feature allows customers to write code for custom connectors. This issue has been fully addressed for all...

Updated Researcher Portal Submission Form: Discover the New Fields in the Submission Form

Summary: We are excited to announce the release of the updated Researcher Portal submission form. These new fields allow Security Researchers to provide additional context for the reported security issue, providing product teams with more data for analysis, gain insights and identify trends acros...

Microsoft mitigates set of cross-site scripting (XSS) vulnerabilities in Azure Bastion and Azure Container Registry

Summary Summary Microsoft recently mitigated a set of cross-site scripting vulnerabilities affecting Azure Bastion and Azure Container Registry ACR. Exploitation of these vulnerabilities could have potentially allowed for an unauthorized user to gain access to a target users session within the...

Announcing The BlueHat Podcast: Listen and Subscribe Now!

Available today on all major podcast platforms is The BlueHat Podcast, a new series of security research focused conversations, continuing the themes from the BlueHat 2023 conference session recordings available to watch here. Since 2005, BlueHat has been where the security research community, an...

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...

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 Zha...

Hunting for Cobalt Strike: Mining and plotting for fun and profit

Introduction Cobalt Strike is a commercial Command and Control framework built by Helpsystems. You can find out more about Cobalt Strike on the MITRE ATT&CK page. But it can also be used by real adversaries. In this post we describe how to use RiskIQ and other Microsoft technologies to see if you...

Microsoft Office to publish symbols starting August 2022

We are excited to announce that Microsoft Office will begin publishing Office symbols for Windows via the Microsoft Public Symbol Server on August 9th 2022. The publication of Office symbols is a part of our continuing investment to improve security and performance for customers and partners. Key...

Anatomy of a Cloud-Service Security Update

Our security teams around the world focus on identifying and mitigating security issues as soon as possible while minimizing customer disruption. One of the challenges of a traditional security update is ensuring customers apply the protections promptly. We recently discussed the work that goes...

Azure Site Recovery の脆弱性を軽減

本ブログは、Microsoft Mitigates Azure Site Recovery Vulnerabilities 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 概要 マ...

2022 年 4 月のセキュリティ更新プログラム (月例)

2022 年 4 月 12 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...

On-Premises Servers Products are Here! Introducing the Applications and On-Premises Servers Bug Bounty Program

Microsoft is excited to announce the addition of Exchange on-premises, SharePoint on-premises, and Skype for Business on-premises to the Applications and On-Premises Servers Bounty Program. Through this expanded program, we encourage researchers to discover and report high-impact security...

Randomizing the KUSER_SHARED_DATA Structure on Windows

Opps, this post exists, but was actually published 4/5/2022. Were navigating you to the correct page now. If that doesnt work click the link below: Randomizing the KUSERSHAREDDATA Structure on Windows – Microsoft Security Response Center...

Inside the MSRC – Anatomy of a SSIRP incident

This is the second in a series of blog posts that shares how the MSRC responds to elevated threats to customers through the Software and Services Incident Response Plan SSIRP. In ourlast blog post, we looked at the history of the Microsoft Security Response Center and SSIRP, and how Microsoft tak...

2019 年 6 月のセキュリティ更新プログラム (月例)

2019 年 6 月 12 日 日本時間、マイクロソフトは以下のソフトウェアのセキュリティ更新プログラムを公開しました。...

November 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...

Should You Send Your Pen Test Report to the MSRC?

Every day, the Microsoft Security Response Center MSRC receives vulnerability reports from security researchers, technology/industry partners, and customers. We want those reports, because they help us make our products and services more secure. High-quality reports that include proof of concept,...

2020 年 IE, Edge で TLS 1.0, 1.1 での接続無効化。確認を！

こんにちは、垣内ゆりかです。 マイクロソフトでは、Transport Layer Security TLS 1.0, 1.1 の利用を廃止し、より安全...

February 2018 security update release

Today, we released security updates to provide additional protections against malicious attackers. By default, Windows 10 receives these updates automatically, and for customers running previous versions, we recommend they turn on automatic updates as a best practice. More information about this...

December 2017 security update release

Today, we released security updates to provide additional protections against malicious attackers. By default, Windows 10 receives these updates automatically, and for customers running previous versions, we recommend they turn on automatic updates as a best practice. More information about this...

November 2017 security update release

Today, we released security updates to provide additional protections against malicious attackers. By default, Windows 10 receives these updates automatically, and for customers running previous versions, we recommend they turn on automatic updates as a best practice. More information about this...

セキュリティ更新プログラム ガイド (Security Update Guide) を使ってみよう

※ 2020 年 11 月に、セキュリティ更新プログラム ガイドがリニューアルしています。新しいセキュリティ更新プログ...

May 2016 security update release

Today we released security updates to provide additional protections against malicious attackers. As a best practice, we encourage customers to apply security updates as soon as they are released. More information about this month’s security updates and advisories can be found in the Security...

September 2014 Security Bulletin Release Webcast and Q&A

Today we’re publishing the September 2014 Security Bulletin Webcast Questions & Answers page. We fielded four questions on various topics during the webcast, with specific bulletin questions focusing primarily on Internet Explorer MS14-052 and a question about the Windows Update client. We invite...

A shared responsibility: Protecting customers through Coordinated Vulnerability Disclosure

In recent weeks several zero-day vulnerabilities have been publicly disclosed. The details of these vulnerabilities were not shared with Microsoft prior to release, and the disclosures put our customers at unnecessary risk...

Jailbreaking is (mostly) simpler than you think

Content warning: This blog post contains discussions of sensitive topics. These subjects may be distressing or triggering for some readers. Reader discretion is advised. Today, we are sharing insights on a simple, optimization-free jailbreak method called Context Compliance Attack CCA, that has...

Faye’s Journey: From Security PM to Diversity Advocate at Microsoft

Faye, a veteran at Microsoft for 22 years, has had a career as varied as it is long. Her journey began in 2002 as the first desktop security Project Manager PM in Microsoft IT. From there, she transitioned into owning a deployment team that deployed to desktops and handled operations for Office’s...

Cybersecurity Awareness Month 2023: Elevating Security Together

As the 20th anniversary of Cybersecurity Awareness Month begins, I find myself reflecting on the strides made since its inception. The journey to enhance and improve cybersecurity is ongoing and extends beyond October. It’s not merely a technological challenge; it is fundamentally about people...

Microsoft Bug Bounty Program Year in Review: $13.8M in Rewards

We are thrilled to share the results of our collaboration with over 345 security researchers from +45 countries around the world in the past 12 months. Together, we have discovered and fixed more than a thousand potential security issues before they impacted our customers. In recognition of this...

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...

セキュリティ更新プログラムの通知・配信の改善 – 新しい配信方法について

本ブログは、Improvements in Security Update Notifications Delivery – And a New Delivery Method の抄訳版です。最新の情報は原文を参照してく...

1年間のバグ報奨金プログラム レビュー: 報奨金 $13.7M

本ブログは、Microsoft Bug Bounty Programs Year in Review: $13.7M in Rewards の抄訳版です。最新の情報は原文を参照してください。 Microsoft...

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...

クラウドサービスにおけるセキュリティ更新のアナトミー

本ブログは、Anatomy of a Cloud-Service Security Update の抄訳版です。最新の情報は原文を参照してください。 世界中のマイク...

All Hands-on Deck: A Whole-of-Society Approach for Cybersecurity

The morning of June 9th, I was driving over the Golden Gate Bridge into San Francisco with my family. While crossing the bridge my children shared some facts about this modern engineering marvel. Each day, approx. 100,000 vehicles travel over the bridge deck, which weighs a staggering 150,000 ton...

Azure Database for PostgreSQL Flexible Server Privilege Escalation and Remote Code Execution

MSRC was informed by Wiz, a cloud security vendor, under Coordinated Vulnerability Disclosure CVD of an issue with the Azure Database for PostgreSQL Flexible Server that could result in unauthorized cross-account database access in a region. By exploiting an elevated permissions bug in the Flexib...

Congratulations and New Swag Awards for the Top MSRC 2022 Q1 Security Researchers!

Today, we are excited to recognize this quarter’s Microsoft Researcher Recognition Program leaderboard and share new swag awards and improvements to the leaderboard. Congratulations and thank you to everyone for your hard work and continued partnership to secure customers. The top three researche...

Randomizing the KUSER_SHARED_DATA Structure on Windows

Opps, this post exists, but was actually published 4/5/2022. We're navigating you to the correct page now. If that doesn't work click the link below: Randomizing the KUSERSHAREDDATA Structure on Windows – Microsoft Security Response Center...

2022 年 3 月のセキュリティ更新プログラム (月例)

2022 年 3 月 8 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...

Microsoft Bug Bounty Programs Year in Review: $13.7M in Rewards

Security researchers are a vital component of the cybersecurity ecosystem that safeguards every facet of digital life and commerce. The researchers who devote time to uncovering and reporting security issues before adversaries can exploit them have earned our collective respect and gratitude. The...

Solving Uninitialized Stack Memory on Windows

This blog post outlines the work that Microsoft is doing to eliminate uninitialized stack memory vulnerabilities from Windows and why we’re on this path. This blog post will be broken down into a few parts that folks can jump to: Uninitialized Memory Background Potential Solutions to Uninitialize...

リモート環境における更新プログラム適用の考慮事項

マイクロソフトは通常通り、4 月の月例セキュリティ更新日 2020 年 4 月 15 日 日本時間 に、定例のセキュリティ更...

2020 年 2 月のセキュリティ更新プログラム (月例)

2020 年 2 月 12 日 日本時間、マイクロソフトは以下のソフトウェアのセキュリティ更新プログラムを公開しまし...

[サイバーセキュリティ月間2020] IT 管理者向け セキュリティ管理に役立つ情報公開のお知らせ

日本政府は、サイバーセキュリティに関する普及啓発強化のため、2 月 1 日から 3 月 18 日までを「サイバーセキ...

Announcing MSRC 2019 Q4 Security Researcher Leaderboard

Following the first Security Researcher Quarterly Leaderboard we published in October 2019, we are excited to announce the MSRC Q4 2019 Security Researcher Leaderboard, which shows the top contributing researchers for the last quarter. In each quarterly leaderboard, we recognize the security...