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 mu...

更新プログラムが正しくインストールされたかを確認する方法 – Windows 10 の場合

本ブログ記事は初級レベルから中級レベルのコンピューター ユーザーを対象にしています。 Windows 8.1 をお使いのお客...

セキュリティ更新プログラム リリース スケジュール (2019 年)

2018 年のリリース スケジュールは「セキュリティ更新プログラム リリース スケジュール 2018 年」をご覧ください。...

October 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 in the Security Update Guide. MSRC team...

2018 年 9 月のセキュリティ更新プログラム (月例)

2018 年 9 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...

EMET サポート終了 – Windows Defender Exploitation Guard へ移行を

こんにちは、垣内ゆりかです。 2009 年にリリースされて以来、最先端の攻撃緩和を追加する無償のツールとして、...

June 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. MSRC team...

April 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...

投機的実行に関する報奨金プログラムの開始

本記事は、Microsoft Security Response Center のブログ “Speculative Execution Bounty Launch” 2016 年 3 月 14 日 米国...

March 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...

2018 年 3 月のセキュリティ更新プログラム (月例)

2018 年 3 月 14 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...

2018 年 1 月のセキュリティ更新プログラム (月例)

2018 年 1 月 10 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...

January 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...

September 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...

Moving Beyond EMET II – Windows Defender Exploit Guard

Since we last wrote about the future of EMET and how it relates to Windows 10 back in November 2016 see Moving Beyond EMET, we have received lots of invaluable feedback from EMET customers and enthusiasts regarding the upcoming EMET end of life. Based on that feedback, we are excited to share...

Announcing the Windows Bounty Program

Windows 10 represents the best and newest in our strong commitment to security with world-class mitigations. One of Microsoft’s longstanding strategies toward improving software security involves investing in defensive technologies that make it difficult and costly for attackers to find, exploit...

[IT 管理者向け] TLS 1.2 への移行を推奨しています

こんにちは、垣内由梨香です データを暗号化し安全にやり取りを行う Transport Layer Security TLS。TLS は利用しているが、詳細なバージョンまでは把握してない、そんな方も多いのではないでしょうか？暗号プロトコルは「使ってさえいれば安全」ではありません。現在の脅威に対応できるバージョンのみを利用しリスクを下げることが重要です。 マイクロソフトでは、より安全な TLS 1.2 へ移行していくことを推奨しています。 2020/9/7 追記 各製品、サービスにおける TLS 1.0/1.1 の廃止予定については、次の情報を参考にしてください。 TLS 1.0 and 1...

Microsoft Edge に関する報奨金プログラムの拡張

本記事は、Microsoft Security Response Center のブログ “Extending the Microsoft Edge Bounty Program” 2017 年 6 月 21 日 米...

Tales from the MSRC: from pixels to POC

Is this thing still on? It’s been a while since we’ve posted to this blog and we think it’s time to start posting deep technical content about Security Research & Defense SRD again. For readers who are new or may have forgotten, this blog is the home of the MSRC Vulnerabilities & Mitigations...

Protecting customers and evaluating risk

Today, Microsoft triaged a large release of exploits made publicly available by Shadow Brokers. Understandingly, customers have expressed concerns around the risk this disclosure potentially creates. Our engineers have investigated the disclosed exploits, and most of the exploits are already...

February 2017 security update release

UPDATE: 2/15/17: We will deliver updates as part of the planned March Update Tuesday, March 14, 2017. Our top priority is to provide the best possible experience for customers in maintaining and protecting their systems. This month, we discovered a last minute issue that could impact some custome...

October 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...

Announcing BlueHat v15 Conference

We are happy to announce the 15th version of the Microsoft BlueHat Security Conference set for January 12-13, 2016. The annual security conference brings internal and external speakers to educate and engage Microsoft’s engineering community and their executives. Work is under way currently to set...

EMET 5.2 is available (update)

Today, we’re releasing the Enhanced Mitigation Experience Toolkit EMET 5.2, which includes increased security protections to improve your security posture. You can download EMET 5.2 from microsoft.com/emet or directly from here. Following is the list of the main changes and improvements: Control...

Assessing risk for the August 2014 security updates

Today we released nine security bulletins addressing 37 unique CVE’s. Two bulletins have a maximum severity rating of Critical while the other seven have a maximum severity rating of Important. This table is designed to help you prioritize the deployment of updates appropriately for your...

May 2014 Security Bulletin Webcast and Q&A

Today we published the May 2014 Security Bulletin Webcast Questions & Answers page. We answered 17 questions in total, with the majority focusing on the update for SharePoint MS14-022, Group Policy MS14-025 and Internet Explorer MS14-029. Here is the video replay: We invite you to join us for the...

April 2014 Security Bulletin Webcast and Q&A

Today we published the April 2013 Security Bulletin Webcast Questions & Answers page. We answered 13 questions in total, with the majority focusing on the update for Internet Explorer MS14-018 and the Windows 8.1 Update KB2919355. Two questions that were not answered on air have been included on...

The March 2014 Security Updates

This month we release five bulletins to address 23 unique CVEs in Microsoft Windows, Internet Explorer and Silverlight. If you need to prioritize, the update for Internet Explorer addresses the issue first described in Security Advisory 2934088, so it should be at the top of your list. While that...

February 2014 Security Bulletin Webcast and Q&A

Today we published the February 2014 Security Bulletin Webcast Questions & Answers page. We answered seven questions on air, with the majority of questions focusing on the MSXML bulletin MS14-005 and the revision to Security Advisory 2915720. One question that was not answered on air has been...

Assessing risk for the January 2014 security updates

Today we released four security bulletins addressing six CVE’s. All four bulletins have a maximum severity rating of Important. We hope that the table below helps you prioritize the deployment of the updates appropriately for your environment. Bulletin Most likely attack vector Max Bulletin...

Assessing risk for the December 2013 security updates

Today we released eleven security bulletins addressing 24 CVE’s. Five bulletins have a maximum severity rating of Critical while the other six have a maximum severity rating of Important. We hope that the table below helps you prioritize the deployment of the updates appropriately for your...

Security Advisory 2916652 released, Certificate Trust List updated

Microsoft is updating the Certificate Trust List CTL for all supported releases of Microsoft Windows to remove the trust of a mis-issued third-party digital certificate, which could be used to spoof content and perform phishing or man-in-the-middle attacks against web properties. With this action...

MS13-106: Farewell to another ASLR bypass

Today we released MS13-106 which resolves a security feature bypass that can allow attackers to circumvent Address Space Layout Randomization ASLR using a specific DLL library HXDS.DLL provided as part of Microsoft Office 2007 and 2010. The existence of an ASLR bypass does not directly enable the...

Authenticity and the November 2013 Security Updates

If you haven't had a chance to see the movie Gravity, I highly recommend you take the time to check it out. The plot moves a bit slowly at times, but director Alfonso Cuaron's work portrayal of zero gravity is worth the ticket price alone. Add in stellar acting and you end up with an epic movie...

Software defense: safe unlinking and reference count hardening

Object lifetime management vulnerabilities represent a very common class of memory safety vulnerability. These vulnerabilities come in many shapes and sizes, and are typically quite difficult to mitigate generically. Vulnerabilities of this type result commonly from incorrect accounting with...

MS13-068: A difficult-to-exploit double free in Outlook

MS13-068 addresses a memory corruption vulnerability accessible by simply previewing a message in the Outlook Preview Pane. As such, we’ve rated this security vulnerability as Critical and we encourage customers to deploy the security update. However, in this case, we believe this particular...

Java: A Fix it for when you cannot let go

There is much to say about the use of Java in both consumer and enterprise environments. Like any other platforms, it has both devoted supporters and fervent critics. But for most, Java is a requirement, a means to an end. In the past few years, Java as a platform has been the target of numerous...

When nothing worked, Artem Shymshyrian kept going

If you had asked Artem Shymshyrian years ago whether he would become a security researcher, the answer would have been far from certain...

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...

BlueHat 2023: Applications to Attend NOW OPEN!

We are excited to announce that applications to attend BlueHat 2023 are now open We are excited to announce that applications to attend BlueHat 2023 are now open BlueHat 2023 will be the 20th version of the BlueHat conference and will once again be on the Microsoft campus in Redmond, WA, USA, fro...

Microsoft Mitigates Vulnerability in Jupyter Notebooks for Azure Cosmos DB

Summary Microsoft recently fixed an authentication bypass vulnerability in Jupyter Notebooks for Azure Cosmos DB currently in preview reported by Orca Security. Customers not using Jupyter Notebooks 99.8% of Azure Cosmos DB customers do NOT use Jupyter notebooks were not susceptible to this...

Azure Synapse Spark で修正された脆弱性について

本ブログは、Vulnerability Fixed in Azure Synapse Spark の抄訳版です。最新の情報は原文を参照してください。 概...

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

The Microsoft Bug Bounty Programs and partnerships with the global security research community are important parts of Microsoft’s holistic approach to defending customers against security threats. Our bounty programs incentivize security research in high-impact areas to stay ahead of the...

2022 年 6 月のセキュリティ更新プログラム (月例)

2022 年 6 月 14 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...

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...

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...

セキュリティ更新プログラム リリース スケジュール (2022 年)

2022 年のセキュリティ更新プログラムの公開予定日は下記のとおりです。更新プログラムの評価、テスト、適用の...

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...

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...

Congratulations to the Top MSRC 2021 Q3 Security Researchers!

Congratulations to all the researchers recognized in this quarter’s MSRC 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 Q3 Security Researcher Leaderboard are: BugHunter010 8...