nmap nse exploitdb script

#Originally from http://forum.intern0t.org/hacking-tools-utilities/3553-exploitdb-nse-nmap-script.html
#Changed to reflect the exploitdb in kali by MrAgent
#Useage  nmap -sV --script=exploitdb.nse xxx.xxx.xxx.xxx

description = [[Searches for exploits in the exploitdb on Backtrack. This archive can also be found at http://www.exploitdb.com]]
author = "L10n"
license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"safe", "vuln"}

require("stdnse")

portrule = function(host, port)
    return port.state == "open"
end

action = function(host, port)
    local n = port.version.product
    local exploits = ""
    for line in io.lines ("/usr/share/exploitdb/files.csv") do
         if string.match(line, n) and string.match(line, "remote") then
             local items = split(line, ",")
             local file  = items[2]
             local desc  = items[3]
             exploits    = exploits..file.." ---> "..desc.."\n"
         end
    end
    if not string.match(exploits, "\n") then
        exploits = nil
    end
    exploits = " \n"..exploits
    return exploits
end

function split(str, pat)
    local t = {}  -- NOTE: use {n = 0} in Lua-5.0
    local fpat = "(.-)" .. pat
    local last_end = 1
    local s, e, cap = str:find(fpat, 1)
    while s do
        if s ~= 1 or cap ~= "" then
	    table.insert(t,cap)
        end
        last_end = e+1
        s, e, cap = str:find(fpat, last_end)
    end
    if last_end <= #str then
        cap = str:sub(last_end)
        table.insert(t, cap)
    end
    return t
end