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Let skypev2-version inspect service fingerprint

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Saves up to 2 requests per service for otherwise unmatched services
This commit is contained in:
dmiller
2015-02-05 04:17:56 +00:00
parent bf58512bec
commit 24f88f9b83
1 changed files with 36 additions and 10 deletions
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46
scripts/skypev2-version.nse
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@@ -2,6 +2,7 @@ local comm = require "comm"
local nmap = require "nmap"
local shortport = require "shortport"
local string = require "string"
local U = require "lpeg-utility"
description = [[
Detects the Skype version 2 service.
@@ -28,22 +29,47 @@ portrule = function(host, port)
end
action = function(host, port)
local status, result = comm.exchange(host, port,
"GET / HTTP/1.0\r\n\r\n", {bytes=26, proto=port.protocol})
if (not status) then
return
local result, rand
-- Did the service engine already do the hard work?
if port.version and port.version.service_fp then
-- Probes sent, replies received, but no match.
result = U.get_response(port.version.service_fp, "GetRequest")
-- Loop through the ASCII probes most likely to receive random response
-- from Skype. Others will also recieve this response, but are harder to
-- distinguish from an echo service.
for _, p in ipairs({"HTTPOptions", "RTSPRequest"}) do
rand = U.get_response(port.version.service_fp, p)
if rand then
break
end
end
end
local status
if not result then
-- Have to send the probe ourselves.
status, result = comm.exchange(host, port,
"GET / HTTP/1.0\r\n\r\n", {bytes=26, proto=port.protocol})
if (not status) then
return nil
end
end
if (result ~= "HTTP/1.0 404 Not Found\r\n\r\n") then
return
end
-- So far so good, now see if we get random data for another request
status, result = comm.exchange(host, port,
"random data\r\n\r\n", {bytes=15, proto=port.protocol})
if (not status) then
return
-- So far so good, now see if we get random data for another request
if not rand then
status, rand = comm.exchange(host, port,
"random data\r\n\r\n", {bytes=15, proto=port.protocol})
if (not status) then
return
end
end
if string.match(result, "[^%s!-~].*[^%s!-~].*[^%s!-~]") then
if string.match(rand, "[^%s!-~].*[^%s!-~].*[^%s!-~]") then
-- Detected
port.version.name = "skype2"
port.version.product = "Skype"