Security Research & Defense
Information from Microsoft about vulnerabilities, mitigations and workarounds, active attacks, security research, tools and guidance
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Security Research & Defense
CVE-2013-3893: Fix it workaround available
Today, we released a Fix it workaround tool to address a new IE vulnerability that had been actively exploited in extremely limited, targeted attacks. This Fix it makes a minor modification to mshtml.dll when it is loaded in memory to address the vulnerability. This Fix it workaround tool is linked from...
17 Sep 2013
Running in the wild, not for so long
Over the weekend we received a report from our partners about a possible unpatched Internet Explorer vulnerability being exploited in the wild. The exploit code uses a memory corruption bug triggered from a webpage but it deeply leverages a Flash SWF file in order to achieve reliable exploitation and...
11 Jul 2013
Microsoft "Fix it" available to mitigate Internet Explorer 8 vulnerability
Today, we are making available a “Microsoft Fix it” solution to block attacks leveraging the Internet Explorer 8 (IE8) vulnerability described in Security Advisory 2847140 . This code-signed, easily downloadable and install-able Fix it package uses the Windows application compatibility toolkit...
9 May 2013
MS12-083: Addressing a missing certificate revocation check in IP-HTTPS
MS12-083 is being released to address a Security Feature Bypass, a class of vulnerability for which we do not frequently release security updates. This is the third such instance, with MS12-001 and MS12-032 previously having addressed Security Feature bypasses. The security feature being bypassed in...
11 Dec 2012
More information on Security Advisory 2737111
Today we released Security Advisory 2737111 to describe the way in which vulnerabilities in Oracle’s Outside In technology impact the document preview functionality of Microsoft Exchange Server 2007 and 2010 and FAST Search Server 2010 for SharePoint. In this blog, we would like to discuss the...
24 Jul 2012
More information on MS12-004
This month we released MS12-004 to address CVE-2012-0003 and CVE-2012-0004. CVE-2012-0003 The most severe of these vulnerabilities is CVE-2012-0003 which is a Critical, Remote Code Execution vulnerability. This CVE affects all editions of Windows XP, Windows Server 2003, Windows Vista and Windows...
10 Jan 2012
More information about the December 2011 ASP.Net vulnerability
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...
28 Dec 2011
Is SSL broken? – More about Security Bulletin MS12-006 (previously known as Security Advisory 2588513)
On January 10 th , Microsoft released MS12-006 in response to a new vulnerability discovered in September in SSL 3.0 and TLS 1.0 . Here we would like to give further information about the technique used to exploit this vulnerability and workaround options Microsoft has released if you discover a compatibility...
26 Sep 2011
Regarding MS11-004, Addressing an IIS FTP Services Vulnerability
Today we released MS11-004 to address a vulnerability in the Microsoft FTP service an optional component of Internet Information Services (IIS). In this blog, we would like to cover some additional technical details of this vulnerability. First, we want to clarify that the vulnerability lies in the...
8 Feb 2011
New workaround included in Security Advisory 2488013
We have just updated Security Advisory 2488013 for the publicly-disclosed Internet Explorer CSS vulnerability. It now reflects the fact that limited attacks attempting to exploit this vulnerability are present in-the-wild. The advisory also includes a new workaround that can help protect your computers...
11 Jan 2011
New Internet Explorer vulnerability affecting all versions of IE
Today we released Security Advisory 2488013 to notify customers of a new publicly-disclosed vulnerability in Internet Explorer (IE). This vulnerability affects all versions of IE. Exploiting this vulnerability could lead to unauthorized remote code execution inside the iexplore.exe process. Proof...
23 Dec 2010
Help and Support Center vulnerability full-disclosure posting
Yesterday evening, one of Google’s security researchers publicly released vulnerability details and a working exploit for an unpatched vulnerability in Windows XP and Windows Server 2003. This afternoon, we’ve released security advisory 2219475 with official guidance. We’d like to use...
10 Jun 2010
Details on the New TLS Advisory
Security Advisory 977377: Vulnerability in TLS Could Allow Spoofing In August of 2009, researchers at PhoneFactor discovered a vulnerability in the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols. As the issue is present in the actual TLS/SSL-standard, not only our implementation...
9 Feb 2010
MS10-001: Font file decompression vulnerability
MS10-001 addresses a vulnerability (CVE-2010-0018 ) in the LZCOMP de-compressor for Microtype Express Fonts. This blog aims to answer some questions regarding the updates we’ve made in this area. What is the issue? t2embed.dll improperly performs bounds-checking on lengths which are decoded from the...
12 Jan 2010
Update on the SMB vulnerability situation
We’d like to give everyone an update on the situation surrounding the new Microsoft Server Message Block Version 2 (SMBv2) vulnerability affecting Windows Vista and Windows Server 2008. Easy way to disable SMBv2 First exploit for code execution released to small number of companies Mitigations...
18 Sep 2009
Internet Explorer Mitigations for ATL Data Stream Vulnerabilities
IE security update MS09-034 implements two defense-in-depth measures intended to mitigate the threat of attacks which attempt to exploit the Microsoft Active Template Library (ATL) vulnerabilities described in Security Advisory 973882 and MS09-034 . We would like to explain these mitigations in more...
28 Jul 2009
MS09-029: Vulnerabilities in the EOT parsing engine
Today we released MS09-029, which addresses vulnerabilities related to EOT font files. To answer a few commonly asked questions, here is a brief FAQ regarding the update: Q: What is the EOT file format? A: EOT stands for Embedded OpenType Font. EOT support in Microsoft applications has existed for...
14 Jul 2009
MS09-019 (CVE-2009-1140): Benefits of IE Protected Mode, additional Network Protocol Lockdown workaround
Benefits of IE Protected Mode One of the vulnerabilities addressed in MS09-019 , CVE-2009-1140, involves navigating to a local file via a UNC path, ex: \\127.0.0.1\c$. This roundabout way of navigating to a file is necessary to execute local content such that it runs in the Internet Explorer Internet...
9 Jun 2009
Investigating the new PowerPoint issue
This afternoon, we posted Security Advisory 969136 describing a new vulnerability in PowerPoint while parsing the legacy binary file format. Unfortunately, we discovered this vulnerability being used to deploy malware in targeted attacks. We expect this blog post will: Help you protect your organization...
3 Apr 2009
Behavior of ActiveX controls embedded in Office documents
The Microsoft Office applications (Word, Excel, PowerPoint, etc) have built-in ActiveX control support. ActiveX support allows a richer experience when interacting with an Office document. For example, a document author could use the Safe-For-Initialization Office Web Components (OWC) ActiveX control...
3 Mar 2009
Clarification on the various workarounds from the recent IE advisory
Today Microsoft revised the Workarounds section of Security Advisory 961051 . We wanted to share more detail about the vulnerability and explain the additional workarounds here to help you protect your computers. Information about the vulnerability The vulnerability is caused by memory corruption...
13 Dec 2008
MS08-076: Windows Media Components: Part 2 of 2
In this part, we would like to talk more about CVE-2008-3010: ISATAP vulnerability in Windows Media components. As described in the bulletin MS08-076, Windows Media components (Windows Media Player, Windows Media Format Runtime, and Windows Media Services) treat an ISATAP server address as an intranet...
9 Dec 2008
MS08-068: SMB credential reflection defense
Today Microsoft released a security update, MS08-068 , which addresses an NTLM reflection vulnerability in the SMB protocol. The vulnerability is rated Important on most operating systems, except Vista and Windows Server 2008 where it has a rating of Moderate. This blog post is intended to explain why...
11 Nov 2008
MS08-055: Microsoft security response process, behind the scenes
One of our blogging goals is to give you a peek “behind the scenes” into our security response process. We thought you might be interested in the story behind MS08-055 , this month's OneNote bulletin. In March, a security researcher sent in a report of an information disclosure vulnerability that...
9 Sep 2008
MS08-043 : How to prevent this information disclosure vulnerability
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...
12 Aug 2008
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