MS13-089  Vulnerability in Windows Graphics Device Interface Could Allow Remote Code Execution

2013-11-12 This security update resolves a 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. 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.
Vulnerabilities addressed in this bulletin:

Graphics Device Interface Integer Overflow Vulnerability

A remote code execution vulnerability exists in the way that the Windows Graphics Device Interface (GDI) processes specially crafted Windows Write files in WordPad. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. 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.
CVE-2013-3940

Bulletin details at Microsoft.com