Security Research & Defense
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Security Research & Defense
MS07-063 - The case of the insecure signature
MS07-063 addresses a weakness in the SMBv2 message signing algorithm. SMB signing is a feature enabled by default on domain controllers to prevent man-in-the-middle attacks. As you can imagine, if an attacker on your local subnet can tamper with the SMB network traffic between your domain controller...
28 Dec 2007
MS10-006 and MS10-012: SMB security bulletins
Today we released two bulletins to address vulnerabilities in SMB. MS10-006 addresses two vulnerabilities in the SMBv1 client implementation, and MS10-012 addresses four vulnerabilities in the SMB server implementation. In this blog entry, we want to help you understand the vulnerabilities and better...
9 Feb 2010
MS09-050: Exploit timeline for the SMB2 RCE vulnerability
This month we are releasing update MS09-050 to address the SMBv2 RCE vulnerability (CVE-2009-3103). Due to the fact that public exploit code exists for this vulnerability, we felt it would be good to summarize the exploit landscape at the time of release, so customers can use this information to prioritize...
12 Oct 2009
Assessing the risk of the June security updates
Today we released 16 security bulletins. Nine have a maximum severity rating of Critical and seven have a maximum severity rating of Important. This release addresses several publicly disclosed vulnerabilities. We hope that the table below helps you prioritize the deployment of the updates appropriately...
14 Jun 2011
Notes on exploitability of the recent Windows BROWSER protocol issue
Earlier this week a PoC exploit for a vulnerability in the BROWSER protocol was released on Full Disclosure. There has been some discussion regarding whether this issue can result in Remote Code Execution (RCE) or is only a Denial of Service (DoS). This blog post provides details on the exploitability...
16 Feb 2011
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
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
MS10-054: Exploitability Details for the SMB Server Update
This month Microsoft released an update for Windows to address three vulnerabilities in the SMB Server component. Two of the vulnerabilities are remote denial-of-service (DoS) attacks, while one (CVE-2010-2550) has the potential for remote code execution (RCE). This blog post provides more details on...
10 Aug 2010
MS10-020: SMB Client Update
Today Microsoft released MS10-020 , which addresses several vulnerabilities in the Windows SMB client. This blog post provides additional details to help prioritize installation of the update, and understand the attack vectors and mitigations that apply. Client-side vulnerabilities The first thing...
12 Apr 2010
MS09-013 and MS09-014: NTLM Credential Reflection Updates for HTTP clients
This month we are taking another step towards blocking NTLM reflection attacks by releasing MS09-014 for Internet Explorer and MS09-013 for Windows. This is the third update related to NTLM credential reflection we have released, and I thought it would be good to go into a bit more detail on why this...
14 Apr 2009
MS11-019 and MS11-020: April SMB Updates
This month we released updates for the SMB client and server components ( MS11-019 and MS11-020 respectively). These bulletins address three externally-reported issues, but also include fixes for several issues that Microsoft identified internally. This blog post provides background on these issues and...
12 Apr 2011
MS09-001: Prioritizing the deployment of the SMB bulletin
This month we released an update for SMB that addresses three vulnerabilities. This blog post provides additional information that might help prioritize the deployment of this update, and help explain the risk for code execution. In the bulletin you will see that the cumulative severity rating is...
9 Jan 2009
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