Since the 30th of May 2012 hackers were abusing the Microsoft XML core services vulnerability. The 10th of July 2012 Microsoft finally published a security advisory which fixes this issue. The present document and video explains the details about this fix. As a lab test they used a Windows XP workstation with Service Pack 3. The Internet explorer version is 6.0.
You can download it from the following link: https://packetstormsecurity.com/files/download/114928/CVE-2012-1889-Security-Update-Analysis.pdf
Source: https://packetstormsecurity.com/files/114928/CVE-2012-1889-Security-Update-Analysis.html