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Bringing you news and commentary on solutions and strategies for protecting critical IT infrastructure in the context of your business.

Microsoft Patch Tuesday – November 2011

Posted November 8, 2011    Chris Silva

This month Microsoft released four security bulletins, patching a total of four vulnerabilities. Included in this month’s bulletins is a particularly ugly vulnerability in tcpip.sys (MS11-083). This vulnerability involves sending a large amount of UDP packets to a closed port. While the amount of work to exploit seems great and Microsoft feels that exploitation will prove unreliable, the reward is high – remote unauthenticated code execution within the kernel. To prevent exploitation, firewall all unused UDP ports at the perimeter, and install the patch as soon as possible.

Not patched this month is the zero-day vulnerability leveraged by Duqu. Last Thursday, Microsoft released a security advisory (2639658) outlining the vulnerability and providing a workaround. Microsoft is already working on a fix, but they did state in advance it would not be ready in time for this patch Tuesday. Given the amount of press that Duqu has received, we’ll see if Microsoft waits until December to patch this or if they release an out-of-band fix sometime this month.

Join us tomorrow for another edition of the Vulnerability Expert Forum (VEF). Marc Maiffret and the eEye Research Team will be talking about today’s security bulletins as well as other security related topics and issues.

Retina Network Security Scanner customers can view the list of audits associated with these bulletins.

Here are this month’s recommendations from the eEye Research Team:

Deploy Immediately

MS11-083 – Vulnerability in TCP/IP Could Allow Remote Code Execution (2588516)
Recommendation: Install the patch immediately to prevent exploitation by attackers. Until the patch can be installed, any unused UDP ports should be blocked at the external firewall.

Deploy As Soon As Possible

MS11-085 – Vulnerability in Windows Mail and Windows Meeting Space Could Allow Remote Code Execution (2620704)
Recommendation: Deploy patches as soon as possible. Until the patch can be installed, block ports 139 and 445 using a firewall, prevent the WebClient service from running, and prevent DLLs from being loaded from WebDAV and remote shares.

MS11-086 – Vulnerability in Active Directory Could Allow Elevation of Privilege (2630837)
Recommendation: Deploy patches as soon as possible. Until the patch can be installed, remove the user account that is associated with the revoked certificate. Also, use LDAPS along with IPsec-based connections that are in “Always check CRL” mode.

Deploy At Earliest Convenience

MS11-084 – Vulnerability in Windows Kernel-Mode Drivers Could Allow Denial of Service (2617657)
Recommendation: Deploy patches at the earliest convenience. Until the patch can be installed, block ports 139 and 445 using a firewall, prevent the WebClient service from running, and disable both the Preview and Details Pane in Windows Explorer.

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Implementing Least Privilege for Windows the Easy Way

Posted July 31, 2014    Morey Haber

The concept of least privilege states that asset users should have the lowest level of access privileges required to effectively conduct their jobs. Implementing least privilege can bring several benefits to your organization, including: Increased security by reducing the attack surface available to users and to potential attackers who compromise user systems via phishing, malware,…

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Introducing the Gartner Market Guide for Privileged Account Management

Posted July 29, 2014    Chris Burd

Gartner recently released a new Market Guide for Privileged Account Management (PAM), and we’d like to share a complimentary copy with you. The report includes PAM market analysis and direction, vendor overviews, and recommendations for selecting PAM solutions for your environment. BeyondTrust is one of two representative vendors (out of 20) to address all solution…

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Integrating Least Privilege and Password Management to Solve Account Security Challenges

Integrating Least Privilege and Password Management to Solve Account Security Challenges

Posted July 24, 2014    Morey Haber

There is a reason all BeyondTrust Privileged Account Management (PAM) solutions share the PowerBroker name: They all inherently enable you to reduce user-based risk and can be integrated under a centralized IT risk management platform. Here’s one common use case that demonstrates how this integration changes the playing field. Consider the challenge of privileged access:…

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