2018 年 10 月 Office 365 で TLS 1.0, 1.1 での接続無効化。 最終確認を！
Thursday, August 30, 2018
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
Month Archives: August 2018
Vulnerability hunting with Semmle QL, part 1
Thursday, August 16, 2018
Previously on this blog, we’ve talked about how MSRC automates the root cause analysis of vulnerabilities reported and found. After doing this, our next step is variant analysis: finding and investigating any variants of the vulnerability. It’s important that we find all such variants and patch them simultaneously, otherwise we bear the risk of these being exploited in the wild. In this post, I’d like to explain the automation we use in variant finding.
For the past year or so, we’ve been augmenting our manual code review processes with Semmle, a third-party static analysis environment. It compiles code to a relational database (the snapshot database – a combination of database and source code), which is queried using Semmle QL, a declarative, object-oriented query language designed for program analysis.
The basic workflow is that, after root cause analysis, we write queries to find code patterns that are semantically similar to the original vulnerability. Any results are triaged as usual and provided to our engineering teams for a fix to be developed. Also, the queries are placed in a central repository to be re-run periodically by MSRC and other security teams. This way, we can scale our variant finding over time and across multiple codebases.
In addition to variant analysis, we’ve been using QL proactively, in our security reviews of source code. This will be the topic of a future blog post. For now, let’s look at some real-world examples inspired by MSRC cases.
2018 年 8 月のセキュリティ更新プログラム (月例)
Tuesday, August 14, 2018
2018 年 8 月 15 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
August 2018 Security Update Release
Tuesday, August 14, 2018
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
Analysis and mitigation of L1 Terminal Fault (L1TF)
Monday, August 13, 2018
In January 2018, Microsoft released 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 a new speculative execution side channel vulnerability known as L1 Terminal Fault (L1TF) which has been assigned CVE-2018-3615 (for SGX), CVE-2018-3620 (for operating systems and SMM), and CVE-2018-3646 (for virtualization).
Microsoft’s Top 100 Security Researchers – Black Hat 2018 Edition
Wednesday, August 08, 2018
This morning we are excited to unveil the security researcher leaderboard at the Black Hat Security Conference. This list recognizes the top security researchers who have contributed research to the Microsoft products and services. If you are curious on how we build the list, check out our blog from last week on The Making of the Top 100 Researcher List.
Announcing the BlueHat v18 Schedule
Thursday, August 02, 2018
Where did the summer go? This year the BlueHat Security Conference moved forward in the schedule to late September. Next year it will settle into a steady orbit of early October moving forward. With that change in schedule, it is hard to believe that it is time to reveal the schedule for BlueHat v18.
The Making of the Top 100 Researcher List
Wednesday, August 01, 2018
At Black Hat USA each year, we unveil the Top 100 Security Researcher list to reflect the amazing engagement we get from the community. During this period, we had several thousand researchers engage with the Microsoft Security Response Center (MSRC). We appreciate all the partnership and coordination that goes on throughout the year.