Contents tagged with Microsoft Windows
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Omphaloskepsis and the December 2013 Security Update Release
There are times when we get too close to a topic. We familiarize ourselves with every aspect and nuance, but fail to recognize not everyone else has done the same. Whether you consider this myopia, navel-gazing, or human nature, the effect is the same. I recognized this during the recent webcast when someone asked the question – “What’s the difference between a security advisory and a security bulletin?” The answer was simple to me, as I’ve been doing this for years, but the question was valid and it reminded me that not every person on the planet knows all of the ins and outs of Update Tuesday.
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Advance Notification Service for December 2013 Security Bulletin Release
Today we’re providing advance notification for the release of 11 bulletins, five Critical and six Important, for December 2013. The Critical updates address vulnerabilities in Internet Explorer, Windows, Microsoft Exchange and GDI+. The Critical update for GDI+ fully addresses the publicly disclosed issue described in Security Advisory 2896666.
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Microsoft Releases Security Advisory 2914486
Today we released Security Advisory 2914486 regarding a local elevation of privilege (EoP) issue that affects customers using Microsoft Windows XP and Server 2003. Windows Vista and later are not affected by this local EoP issue. A member of the Microsoft Active Protections Program (MAPP) found this issue being used on systems compromised by a third-party remote code execution vulnerability. These limited, targeted attacks require users to open a malicious PDF file. The issues described by the advisory cannot be used to gain access to a remote system alone.
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MBSA 2.3 and the November 2013 Security Bulletin Webcast, Q&A, and Slide Deck
Today we’re publishing the November 2013 Security Bulletin Webcast Questions & Answers page. The majority of questions focused on the ActiveX Kill Bits bulletin (MS13-090) and the advisories. We also answered a few general questions that were not specific to any of this month’s updates, but that may be of interest.
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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 that really makes you miss the shuttle program. Still, the movie has its detractors. Specifically, astrophysicist and geek icon Neil deGrasse Tyson has been critical about the movie's authenticity. To deGrasse Tyson, a lack of authenticity disrupts the movie-going experience.
Similarly, a lack of authenticity can disrupt your computing experience, which leads me to a couple of interesting items in this month's release. Two advisories this month deal with authenticity by focusing on certificates and cryptography. The first is Security Advisory 286725, which disables the use of the RC4 stream cipher. As computing power increases, cryptographic attacks that were once only theoretical become practical - this is the case with RC4, which was originally designed in 1987. That's the same year The Simpsons first appeared as shorts on The Tracy Ullman Show. Computing has changed somewhat in that time.
We've already taken this step in Windows 8.1 and Internet Explorer 11, and now we're providing an update to disable its use in other operating systems as well. Rather than automatically disable the cipher, the update provides a registry key that allows developers to eliminate RC4 as an available cipher in their applications. The SRD blog provides a deep dive into RC4 and the implications of disabling it.
Security Advisory 2880823 also impacts cryptography and authenticity but addresses SHA1. We aren't going to surprise the world by saying we're turning off support for SHA1 today, but we are announcing a new policy for Certificate Authorities (CAs) that deprecates the use of the SHA1 algorithm in SSL and code signing certificates in favor of the SHA2 algorithm. After January 2016, only SHA2 certificates can be issued. The good folks over on the PKI blog go into more detail about the change.
We have an update regarding a cryptographic function as well, MS13-095 addresses an issue in Digital Signatures that could cause a web service to stop responding if it receives a specially crafted X.509 certificate. Since these certificates are used to ensure authenticity, having the web service go down during negotiation is suboptimal.
Of course, another way to help ensure authenticity throughout your computing experience is to use EMET. An updated version of the program is available today. Of the many improvements, there is an update to the default settings that includes two new application protection profiles for applications. There's also an update for the Certificate Trust profile that offers more applications protection. Full details about this release can be found on the SRD blog. It may not patch any holes, but it can make it harder to reach any issue that may exist on a system and, if your family is like mine, it will significantly reduce calls from relatives looking for tech support.
Of course it takes more than just authenticity to make a secure computing experience, which leads us to the other updates for November. Today, we released eight bulletins, three Critical and five Important, addressing 19 unique CVEs in Microsoft Windows, Internet Explorer, and Office. For those who need to prioritize their deployment planning we recommend focusing on MS13-090, MS13-088, and MS13-089.
Our Bulletin Deployment Priority graph provides an overview of this month's priority releases (click to enlarge).
MS13-090 | Cumulative Security Update of Active X Kill Bits
This update addresses a remote code execution issue in an ActiveX control by providing a kill bit for associated ActiveX controls. We are aware of limited attacks that exploit this issue. The code execution occurs at the level of the logged on user, so non-admin users would face less of an impact. The remote code execution vulnerability with higher severity rating be fixed in today's release and we advise customers to prioritize the deployment of MS13-090 for their monthly release. As usual, customer with Automatic Updates enabled will not need to take any action to receive the update. Additional information about this vulnerability is available on the Security Research & Defense blog.
MS13-088 | Cumulative Update for Internet Explorer
This security update resolves ten privately reported vulnerabilities in Internet Explorer. The most severe vulnerabilities could allow remote code execution if a user views a specially crafted webpage using Internet Explorer. An attacker who successfully exploited the most severe of these vulnerabilities could gain the same user rights as the current user.
MS13-089 | Vulnerability in Windows Graphics Device Interface Could Allow Remote Code Execution
This update addresses one privately reported vulnerability in Microsoft Windows. The vulnerability could allow remote code execution if a user views or opens a specially crafted Windows Write file in WordPad. An attacker who successfully exploited this vulnerability could gain the same user rights as the current user.
Last but not least, we are also providing an update for users of DirectAccess (DA) through Security Advisory 2862152. This security feature bypass issue would require a man-in-the-middle attacker to be successful, but if someone can snoop on your DA connection, it's possible they could impersonate a legitimate DA server in order to establish connections with legitimate DA clients. The attacker-controlled system could then intercept the target user's network traffic and potentially determine the encrypted domain credentials. This update, along with the new configuration guidelines available in KB2862152, helps ensure the authenticity of DA connections.
Watch the bulletin overview video below for a brief summary of today's releases.
Our risk and impact graph shows an aggregate view of this month's Security and Exploitability Index (click to enlarge).
For more information about this month's security updates, including the detailed view of the Exploit Index broken down by CVE, visit the Microsoft Bulletin Summary Webpage.
Jonathan Ness and I will host the monthly bulletin webcast, scheduled for Wednesday, November 13, 2013, at 11 a.m. PST. I invite you to register here and tune in to learn more about this month's security bulletins and advisories. We'll provide authentic answers to your update deployment questions, but no zero gravity effects will be employed.
For all the latest information, you can also follow the MSRC team on Twitter at @MSFTSecResponse.
I look forward to hearing your questions in the webcast tomorrow.
Thanks,
Dustin Childs
Group Manager, Response Communications
Microsoft Trustworthy Computing -
Microsoft Releases Security Advisory 2896666
Today we released Security Advisory 2896666 regarding an issue that affects customers using Microsoft Windows Vista and Windows Server 2008, Microsoft Office 2003 through 2010, and all supported versions of Microsoft Lync. We are aware of targeted attacks, largely in the Middle East and South Asia. The current versions of Microsoft Windows and Office are not affected by this issue. The exploit requires user interaction as the attack is disguised as an email requesting potential targets to open a specially crafted Word attachment. If the attachment is opened or previewed, it attempts to exploit the vulnerability using a malformed graphics image embedded in the document. An attacker who successfully exploited the vulnerability could gain the same user rights as the logged on user.
While we are actively working to develop a security update to address this issue, we encourage our customers concerned with the risk associated with this vulnerability, to deploy the following Fix it from the advisory: -
Lovely tokens and the September 2013 security updates
Helen Hunt Jackson famously wrote, “By all lovely tokens September is here, with summer’s best of weather and autumn’s best of cheer.” I share Helen’s clear adoration for this time of year. As a sports fan, there are so many “lovely tokens” to enjoy. The baseball pennant race is heating up, college and pro football are underway, and various soccer leagues (real football to the rest of the world) continue. As a parent, there are the “lovely tokens” of my kids returning to school, which brings a reminder of summer’s passing and excitement for another year of learning, growing, and adjusting to a new routine. For me, the routine is set: the second Tuesday of the month is here and with it comes a round of “lovely tokens” to help protect our customers.
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August 2013 Security Bulletin Webcast, Q&A, and Slide Deck
Today we’re publishing the August 2013 Security Bulletin Webcast Questions & Answers page. We fielded 13 questions on various topics during the webcast, with specific bulletin questions focusing primarily on Exchange Server (MS13-061) and Windows Kernel (MS13-063). There were 3 additional questions during the webcast that we were unable to answer on air, and we have also answered those on the Q&A page.
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Leaving Las Vegas and the August 2013 security updates
Two weeks ago I, along with 7,500 of my closest friends, attended the Black Hat security conference in Las Vegas, NV. I can’t speak for everyone, but I certainly had a great – if not exhausting – time while there. While there were a lot of great talks, a personal highlight for me each year is the chance to meet and talk with the various people who attend. It was even more fun for me this time around, as we had some great new programs here at Microsoft to talk about.
