CVE-2011-1264

Vulnerability

A cross-site scripting (XSS) vulnerability exists in the Active Directory Certificate Services Web Enrollment site on Microsoft Windows Server 2003 SP2 and Windows Server 2008 Gold, SP2, R2, and R2 SP1. The flaw occurs because the site does not properly validate an unspecified input parameter, allowing an attacker to inject arbitrary web script or HTML [1].

Exploitation

An attacker must send a specially crafted link to a target user and convince them to click it. The attacker cannot force the user to visit the vulnerable site; instead, they must rely on social engineering, typically via email or instant messaging [1].

Impact

Successful exploitation enables the attacker to execute arbitrary commands in the security context of the target user, leading to elevation of privilege. This could result in disclosure of sensitive information, modification of data, or other malicious actions within the affected web application [1].

Mitigation

Microsoft released security update MS11-051 on June 14, 2011, which addresses the vulnerability by correcting input validation in the Web Enrollment site. Customers with automatic updating enabled will receive the update automatically; others should apply it manually. No workarounds are documented [1].