1 files changed, 106 insertions, 0 deletions
diff --git a/scripts/cvs-brute.nse b/scripts/cvs-brute.nse
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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
+