Attention: Microsoft Releases Patch Tuesday For June 2012, Patch Your Systems Now

Microsoft has issued “Patch Tuesday” for June 2012. Total seven security bulletins are released. These seven bulletins address security issues in Windows, Internet Explorer, and the .NET Framework. Three of these seven bulletins are rated critical, the highest possible rating by Microsoft. The remaining four bulletins are rated as important.

Important: Users should update their system as soon as possible since a critical IE vulnerability which Microsoft has patched in this month’s Patch Tuesday is under active exploit.

Microsoft Security Bulletins For June 2012 (Patch Tuesday)

Below is a quick overview of June 2012 security bulletins issued by Microsoft.

Bulletin ID Bulletin Title and Executive Summary Affected Software
MS12-036 Vulnerability in Remote Desktop Could Allow Remote Code Execution (2685939)

This security update resolves a privately reported vulnerability in the Remote Desktop Protocol. The vulnerability could allow remote code execution if an attacker sends a sequence of specially crafted RDP packets to an affected system. By default, the Remote Desktop Protocol (RDP) is not enabled on any Windows operating system. Systems that do not have RDP enabled are not at risk.

Microsoft Windows
MS12-037 Cumulative Security Update for Internet Explorer (2699988)

This security update resolves one publicly disclosed and twelve 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 any of these vulnerabilities could gain the same user rights as the current user. Users whose accounts are configured to have fewer user rights on the system could be less affected than users who run with administrative user rights.

Microsoft Windows,
Internet Explorer
MS12-038 Vulnerability in .NET Framework Could Allow Remote Code Execution (2706726)

This security update resolves one privately reported vulnerability in Microsoft .NET Framework. The vulnerability could allow remote code execution on a client system if a user views a specially crafted webpage 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 affected than users who run with administrative user rights. The vulnerability could also be used by Windows .NET applications to bypass Code Access Security (CAS) restrictions.

In a web browsing attack scenario, an attacker could host a website that has a webpage that is used to exploit this vulnerability. In addition, compromised websites and websites that accept or host user-provided content or advertisements could contain specially crafted content that could exploit this vulnerability. In all cases, however, an attacker would have no way to force users to visit these websites. Instead, an attacker would have to convince users to visit the website, typically by getting them to click a link in an email message or Instant Messenger message that takes users to the attacker’s website.

Microsoft Windows, Microsoft .NET Framework
MS12-039 Vulnerabilities in Lync Could Allow Remote Code Execution (2707956)

This security update resolves one publicly disclosed vulnerability and three privately reported vulnerabilities in Microsoft Lync. The most severe vulnerabilities could allow remote code execution if a user views shared content that has specially crafted TrueType fonts.

Microsoft Lync
MS12-040 Vulnerability in Microsoft Dynamics AX Enterprise Portal Could Allow Elevation of Privilege (2709100)

This security update resolves one privately reported vulnerability in Microsoft Dynamics AX Enterprise Portal. The vulnerability could allow elevation of privilege if a user clicks a specially crafted URL or visits a specially crafted website. In an email attack scenario, an attacker could exploit the vulnerability by sending an email message that has the specially crafted URL to the user of the targeted Microsoft Dynamics AX Enterprise Portal site and by convincing the user to click the specially crafted URL.

Internet Explorer 8 and Internet Explorer 9 users browsing to a Microsoft Dynamics AX Enterprise Portal site in the Internet Zone are at a reduced risk. By default, the XSS Filter in Internet Explorer 8 and Internet Explorer 9 prevents this attack in the Internet Zone. However, the XSS Filter in Internet Explorer 8 and Internet Explorer 9 is not enabled by default in the Intranet Zone.

Microsoft Dynamics AX
MS12-041 Vulnerabilities in Windows Kernel-Mode Drivers Could Allow Elevation of Privilege (2709162)

This security update resolves five privately reported vulnerabilities in Microsoft Windows. The vulnerabilities could allow elevation of privilege if an attacker logs on to a system and runs a specially crafted application. An attacker must have valid logon credentials and be able to log on locally to exploit any of these vulnerabilities.

Microsoft Windows
MS12-042 Vulnerabilities in Windows Kernel Could Allow Elevation of Privilege (2711167)

This security update resolves one privately reported vulnerability and one publicly disclosed vulnerability in Microsoft Windows. The vulnerabilities could allow elevation of privilege if an attacker logs on to an affected system and runs a specially crafted application that exploits the vulnerability. An attacker must have valid logon credentials and be able to log on locally to exploit this vulnerability. The vulnerability could not be exploited remotely or by anonymous users.

Microsoft Windows

Bulletin Deployment Priorities guidance

The Bulletin Deployment Priorities image (click here for full size) below suggests how the security bulletins should be deployed on affected systems.

Bulletin Deployment Priorities

Severity and Exploitability Index graph

The Severity and Exploitability Index graph (click here for full size) below represents the risk and the impact of each bulletin.

Severity and Exploitability Index

June 2012 Patch Tuesday Update Downloads

If your Windows is set to automatically download and update patches, most probably you system is already patched. If you have set it to manually download updates, you should open Windows Update and patch your system. You may have to click on the “check for updates” button to retrieve latest updates. If you want to download the updates for updating all your systems, you should visit the Microsoft Download Center. The June 2012 security ISO image will be made available soon at the Microsoft Download Center soon.

More information about June 2012’s Patch Tuesday

The official summary page of the bulletins can be found here. You can also visit the Microsoft Security Response Center official blog for more details.

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