MS05-020: DHTML Proof of Concept Exploit Developed
http://isc.sans.org/diary.php?date=2005-04-12

MS05-020 - Cumulative Security Update for Internet Explorer. This aggregate patch addresses several vulnerabilities in Internet Explorer that could lead to remote code execution:

* DHTML Object Memory Corruption Vulnerability (CAN-2005-0553)
* URL Parsing Memory Corruption Vulnerability (CAN-2005-0554)
* Content Advisor Memory Corruption Vulnerability (CAN-2005-0555)

Special note: A proof-of-concept exploit for this vulnerability is already publicly available from FrSIRT. The availability of the exploit is likely to increase the severity of this patch for most organizations.

French Security Incident Response Team
http://www.frsirt.com/english/

Microsoft Internet Explorer DHTML Object handling Exploit (MS05-020) - Please be careful as actual POC code is present in this link 
http://www.frsirt.com/exploits/20050412.InternetExploiter2.php