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