Today, the MSRC released Security Advisory 2794220 alerting customers to limited, targeted attacks affecting customers using Internet Explorer 6, 7, and 8. Internet Explorer 9 and Internet Explorer 10 users are safe. More information about the vulnerability and exploit In this particular vulnerability...

Today we released MS11-100 , addressing a newly disclosed denial-of-service vulnerability affecting several vendors’ Web application platforms, including Microsoft’s ASP.NET. Yesterday, we posted an SRD blog describing the vulnerability and the detection and workaround opportunities. With...

Today, we released Security Advisory 2659883 alerting customers to a newly disclosed denial-of-service vulnerability affecting several vendors’ web application platforms, including Microsoft’s ASP.NET. This blog post will cover the following: Impact of the vulnerability How to know...

In July, we released a beta Office file format viewer application called OffVis as a downloadable tool. We are pleased today to announce an updated version of OffVis and a 30 minute training video to help you understand the legacy Office binary file format. OffVis 1.1 The community response to...

This afternoon, the MSRC posted a security advisory describing a newly-disclosed vulnerability in the IIS FTP service that could potentially grant remote code execution to untrusted users. You can find the advisory here . Vulnerability summary The vulnerability is a stack overflow in the FTP service...

We’ve gotten questions from security researchers and malware protection vendors about the binary file format used by Microsoft Word, PowerPoint, and Excel. The format specification is open and we have spoken at several conferences ( 1 , 2 , 3 ) about detecting malicious docs but we wanted to do more...

In this month’s update for Excel we addressed an interesting CVE (CVE-2008-3003) – the first vulnerability to affect the new Open XML file format (but it doesn’t result in code execution). This is an information disclosure vulnerability that can arise when a user makes a data connection from Excel to...

A few weeks ago we posted a blog entry titled " How to parse the .doc file format ". Today's blog post will show you how to use that information to check whether a .doc file is specially crafted to exploit MS08-042, one of the vulnerabilities addressed by today's security updates. This particular vulnerability...

This past February, Microsoft publicly released the Office binary file formats specification . These describe how to parse Word, Excel, and PowerPoint files to review or extract the content. Because they describe the structure of these file formats in detail, we think the file format specification will...