107 lines
2.9 KiB
Lua
107 lines
2.9 KiB
Lua
local brute = require "brute"
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local creds = require "creds"
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local cvs = require "cvs"
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local shortport = require "shortport"
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local stdnse = require "stdnse"
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description = [[
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Performs brute force password auditing against CVS pserver authentication.
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]]
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---
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-- @usage
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-- nmap -p 2401 --script cvs-brute <host>
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--
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-- @output
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-- 2401/tcp open cvspserver syn-ack
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-- | cvs-brute:
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-- | Accounts
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-- | hotchner:francisco - Account is valid
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-- | reid:secret - Account is valid
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-- | Statistics
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-- |_ Performed 544 guesses in 14 seconds, average tps: 38
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--
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-- @args cvs-brute.repo string containing the name of the repository to brute
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-- if no repo was given the script checks the registry for any
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-- repositories discovered by the cvs-brute-repository script. If the
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-- registry contains any discovered repositories, the script attempts to
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-- brute force the credentials for the first one.
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-- Version 0.1
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-- Created 07/13/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
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author = "Patrik Karlsson"
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license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
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categories = {"intrusive", "brute"}
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dependencies = {"cvs-brute-repository"}
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portrule = shortport.port_or_service(2401, "cvspserver")
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Driver =
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{
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new = function(self, host, port, repo)
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local o = { repo = repo, helper = cvs.Helper:new(host, port) }
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setmetatable(o, self)
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self.__index = self
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return o
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end,
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connect = function( self )
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self.helper:connect(brute.new_socket())
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return true
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end,
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login = function( self, username, password )
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local status, err = self.helper:login( self.repo, username, password )
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if ( status ) then
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return true, creds.Account:new(username, password, creds.State.VALID)
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end
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-- This error seems to indicate that the user does not exist
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if ( err:match("E PAM start error%: Critical error %- immediate abort\0$") ) then
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stdnse.debug2("The user %s does not exist", username)
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local err = brute.Error:new("Account invalid")
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err:setInvalidAccount(username)
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return false, err
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end
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return false, brute.Error:new( "Incorrect password" )
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end,
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disconnect = function( self )
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self.helper:close()
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end,
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}
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local function getDiscoveredRepos(host)
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if ( not(host.registry.cvs_repos)) then
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return
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end
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return host.registry.cvs_repos
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end
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action = function(host, port)
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local repo = stdnse.get_script_args("cvs-brute.repo") and
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{ stdnse.get_script_args("cvs-brute.repo") } or
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getDiscoveredRepos(host)
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if ( not(repo) ) then stdnse.verbose1("ERROR: No CVS repository specified (see cvs-brute.repo)") end
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local status, result
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-- If repositories were discovered and not overridden by argument
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-- only attempt to brute force the first one.
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local engine = brute.Engine:new(Driver, host, port, repo[1])
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engine.options.script_name = SCRIPT_NAME
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status, result = engine:start()
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return result
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end
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