The Windows Internet (WinINet) application programming interface (API) provides applications with an implementation of standard protocols such as FTP and HTTP.
An NTLM credential reflection vulnerability allows a remote web site to re-use a user's authentication response to gain unauthorized access to the user's system.
Apply the patch referenced in Microsoft Security Bulletin 09-014.
Exploit works on Windows XP and requires a user to load the exploit page in Internet Explorer. In some cases, the user will also need to provide authentication credentials in order to load the page.
If successful, this exploit will disable the firewall on the target.