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update by Jason DePriest to do HELP query in addition to EHLO

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fyodor
2007-10-12 21:56:20 +00:00
parent 41e5fdb353
commit a3cb8dfdcc
1 changed files with 41 additions and 12 deletions
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53
scripts/SMTPcommands.nse
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@@ -1,13 +1,15 @@
-- SMTP supported commands gathering script
-- Version History
-- 1.0.0.0 - 2007-06-12
-- 1.1.0.0 - 2007-10-12
-- added HELP command in addition to EHLO
-- Cribbed heavily from Thomas Buchanan's SQL version detection
-- script and from Arturo 'Buanzo' Busleiman's SMTP open relay
-- detector script.
id = "SMTP"
description = "Attempts to use EHLO to gather the Extended commands an SMTP server supports."
description = "Attempts to use EHLO and HELP to gather the Extended commands an SMTP server supports."
author = "Jason DePriest <jrdepriest@gmail.com>"
license = "See nmaps COPYING for licence"
categories = {"discovery", "intrusive"}
@@ -21,6 +23,8 @@ action = function(host, port)
local socket = nmap.new_socket()
socket:set_timeout(5000)
local result1
local result2
local result
local commands
local mailservername
@@ -36,22 +40,47 @@ action = function(host, port)
result = try(socket:receive_lines(1))
-- ASCII for "EHLO example.org\n"
-- for some reason it wouldn't reply unless I did it like this
local query = "\069\072\076\079\032\101\120\097"
query = query .. "\109\112\108\101\046\111\114\103"
query = query .. "\013\010"
try(socket:send(query))
result = try(socket:receive_lines(1))
-- for some reason it wouldn't reply unless I did it like this
local query = "\069\072\076\079\032\101\120\097"
query = query .. "\109\112\108\101\046\111\114\103"
query = query .. "\013\010"
try(socket:send(query))
result1 = try(socket:receive_lines(1))
if not string.match(result, "^250") then
if not string.match(result1, "^250") then
socket.close()
-- TODO: use print_debug instead
return "EHLO with errors or timeout. Enable --script-trace to see what is happening."
end
-- EHLO returns a multiline result - I would like to pull out the line feeds and replace them with
-- something nicer like commas. But when I do that, it messes up the first two lines as well, which
-- probably should be on their own lines. I have not mastered the regexes for NSE yet, so maybe some day.
-- get rid of the line that says the commnad completed successfully
result1 = string.gsub(result1, "\050\053\048\032\079\075\013\010", "") -- 250 OK (needed to have the \r\n in there)
-- get rid of the 250- at the beginning of each line in the response
result1 = string.gsub(result1, "250%-", "") -- 250-
result1 = "Responded to EHLO command\n" .. result1
-- ASCII for "HELP\n"
-- for some reason it wouldn't reply unless I did it like this
local query = "\072\069\076\080\013\010"
try(socket:send(query))
result2 = try(socket:receive_lines(1))
if not string.match(result2, "^214") then
socket.close()
-- TODO: use print_debug instead
return "EHLO with errors or timeout. Enable --script-trace to see what is happening."
return "HELP with errors or timeout. Enable --script-trace to see what is happening."
end
result = string.gsub(result, "\050\053\048\032\079\075\013\010", "") -- 250 OK (needed to have the \r\n in there)
result = string.gsub(result, "250%-", "") -- 250-
result = "Responded to EHLO command\n" .. result
-- get rid of the 214 at the beginning of the lines in the response
result2 = string.gsub(result2, "214%-", "") -- 214-
result2 = string.gsub(result2, "214 ", "") -- 214
result2 = "Responded to HELP command\n" .. result2
result = result1 .. result2
return result