The Glider

Bulletin Severity Rating:Important - This security update resolves a privately reported vulnerability in Microsoft Windows. The vulnerability could allow denial of service if an attacker created a specially crafted SMB packet and sent the packet to an affected system. Firewall best practices and standard default firewall configurations can help protect networks from attacks originating outside the enterprise perimeter that would attempt to exploit this vulnerability.

Bulletin Severity Rating:Critical - This security update resolves a publicly disclosed vulnerability in Microsoft .NET Framework. The vulnerability could allow remote code execution on a client system if a user views a specially crafted Web page using a Web browser that can run XAML Browser Applications (XBAPs). Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. The vulnerability could also allow remote code execution on a server system running IIS, if that server allows processing ASP.NET pages and an attacker succeeds in uploading a specially crafted ASP.NET page to that server and then executes the page, as could be the case in a Web hosting scenario. This vulnerability could also be used by Windows .NET applications to bypass Code Access Security (CAS) restrictions.

Bulletin Severity Rating:Important - This security update resolves a privately reported vulnerability in Windows Server 2008 Hyper-V and Windows Server 2008 R2 Hyper-V. The vulnerability could allow denial of service if a specially crafted packet is sent to the VMBus by an authenticated user in one of the guest virtual machines hosted by the Hyper-V server. An attacker must have valid logon credentials and be able to send specially crafted content from a guest virtual machine to exploit this vulnerability. The vulnerability could not be exploited remotely or by anonymous users.

Bulletin Severity Rating:Critical - This security update resolves two privately reported vulnerabilities in the Microsoft Distributed File System (DFS). The more severe of these vulnerabilities could allow remote code execution when an attacker sends a specially crafted DFS response to a client-initiated DFS request. An attacker who successfully exploited this vulnerability could execute arbitrary code and take complete control of an affected system. Firewall best practices and standard default firewall configurations can help protect networks from attacks that originate outside the enterprise perimeter. Best practices recommend that systems that are connected to the Internet have a minimal number of ports exposed.

Bulletin Severity Rating:Important - This security update resolves a publicly disclosed vulnerability in the Microsoft Windows Ancillary Function Driver (AFD). The vulnerability could allow elevation of privilege if an attacker logs on to a user's system and runs a specially crafted application. An attacker must have valid logon credentials and be able to log on locally to exploit the vulnerability.

Bulletin Severity Rating:Critical - This security update resolves a privately reported vulnerability in the Microsoft implementation of Vector Markup Language (VML). This security update is rated Critical for Internet Explorer 6, Internet Explorer 7, and Internet Explorer 8 on Windows clients; and Moderate for Internet Explorer 6, Internet Explorer 7, and Internet Explorer 8 on Windows servers. Internet Explorer 9 is not affected by the vulnerability. The vulnerability could allow remote code execution if a user viewed a specially crafted Web page using Internet Explorer. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

Bulletin Severity Rating:Important - This security update resolves eight privately reported vulnerabilities in Microsoft Office. The vulnerabilities could allow remote code execution if a user opens a specially crafted Excel file. An attacker who successfully exploited any of these vulnerabilities could gain the same user rights as the logged-on user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. Installing and configuring Office File Validation (OFV) to prevent the opening of suspicious files blocks the attack vectors for exploiting the vulnerabilities described in CVE-2011-1272, CVE-2011-1273, and CVE-2011-1279. See the section, Frequently Asked Questions (FAQ) Related to This Security Update, for more information about how the Office File Validation feature can be configured to block the attack vectors. Microsoft Excel 2010 is only affected by CVE-2011-1273 described in this bulletin. The automated Microsoft Fix it solution, "Disable Edit in Protected View for Excel 2010," available in Microsoft Knowledge Base Article 2501584, blocks the attack vectors for exploiting CVE-2011-1273.

Bulletin Severity Rating:Critical - This security update resolves a privately reported vulnerability in Microsoft Windows Object Linking and Embedding (OLE) Automation. The vulnerability could allow remote code execution if a user visits a Web site containing a specially crafted Windows Metafile (WMF) image. In all cases, however, an attacker would have no way to force users to visit such a Web site. Instead, an attacker would have to convince users to visit a malicious Web site, typically by getting them to click a link in an e-mail message or Instant Messenger request.

Bulletin Severity Rating:Critical - This security update resolves a privately reported vulnerability in the Microsoft Forefront Threat Management Gateway (TMG) 2010 Client, formerly named the Microsoft Forefront Threat Management Gateway Firewall Client. The vulnerability could allow remote code execution if an attacker leveraged a client computer to make specific requests on a system where the TMG firewall client is used.

Severity Rating: Critical
Revision Note: V1.0 (June 14, 2011): Bulletin published.
Summary: This security update resolves a privately reported vulnerability in the Microsoft Forefront Threat Management Gateway (TMG) 2010 Client, formerly named the Microsoft Forefront Threat Management Gateway Firewall Client. The vulnerability could allow remote code execution if an attacker leveraged a client computer to make specific requests on a system where the TMG firewall client is used.