With the release of the Microsoft security bulletins for December 2012, Company flag total 7 updates for Windows users, where one is rated as critical that could lead to remote code execution, where as other two are rated as important which fix flaws that could result in the operating system's security features being bypassed.

All of the IE fixes involve use-after-free memory vulnerabilities. Where as kernel level exploits bundled into mass-exploitation kits is like Blackhole.

In addition to IE, Microsoft is fixing a critical flaw in Microsoft Word that could enable attackers to execute remote code. The vulnerability could be exploited by way of a malformed Rich Text Format (RTF) document.

Also Fonts can also be used as a potential attack vector, as this Patch Tuesday reveals. A pair of critical font parsing vulnerabilities are being patched this month, one for OpenType and the other for TrueType fonts.


Details of all Updates :

MS12-077 – All versions of Internet Explorer are affected. This security update resolves three 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 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 impacted than users who operate with administrative user rights.

MS12-078Vulnerabilities in Windows Kernel-Mode Drivers Could Allow Remote Code ExecutionThis security update resolves one publicly disclosed vulnerability and one privately reported vulnerability in Microsoft Windows. The more severe of these vulnerabilities could allow remote code execution if a user opens a specially crafted document or visits a malicious webpage that embeds TrueType or OpenType font files. An attacker would have to convince users to visit the website, typically by getting them to click a link in an email message that takes them to the attacker's website.

MS12-079 - Vulnerability in Microsoft Word Could Allow Remote Code Execution. This security update resolves a privately reported vulnerability in Microsoft Office. The vulnerability could allow remote code execution if a user opens a specially crafted RTF file using an affected version of Microsoft Office software, or previews or opens a specially crafted RTF email message in Outlook while using Microsoft Word as the email viewer. An attacker who successfully exploited the vulnerability 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 impacted than users who operate with administrative user rights.

MS12-080 - Vulnerabilities in Microsoft Exchange Server Could Allow Remote Code Execution. This security update resolves publicly disclosed vulnerabilities and one privately reported vulnerability in Microsoft Exchange Server. The most severe vulnerabilities are in Microsoft Exchange Server WebReady Document Viewing and could allow remote code execution in the security context of the transcoding service on the Exchange server if a user previews a specially crafted file using Outlook Web App (OWA). The transcoding service in Exchange that is used for WebReady Document Viewing is running in the LocalService account. The LocalService account has minimum privileges on the local computer and presents anonymous credentials on the network.

MS12-081 - Vulnerability in Windows File Handling Component Could Allow Remote Code Execution. This security update resolves a privately reported vulnerability in Microsoft Windows. The vulnerability could allow remote code execution if a user browses to a folder that contains a file or subfolder with a specially crafted name. An attacker who successfully exploited this vulnerability 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 impacted than users who operate with administrative user rights.

MS12-082 - Vulnerability in DirectPlay Could Allow Remote Code Execution. This security update resolves a privately reported vulnerability in Microsoft Windows. The vulnerability could allow remote code execution if an attacker convinces a user to view a specially crafted Office document with embedded content. An attacker who successfully exploits this vulnerability 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 impacted than users who operate with administrative user rights.

MS12-083 Vulnerability in IP-HTTPS Component Could Allow Security Feature Bypass. This security update resolves a privately reported vulnerability in Microsoft Windows. The vulnerability could allow security feature bypass if an attacker presents a revoked certificate to an IP-HTTPS server commonly used in Microsoft DirectAccess deployments. To exploit the vulnerability, an attacker must use a certificate issued from the domain for IP-HTTPS server authentication. Logging on to a system inside the organization would still require system or domain credentials.

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