1 files changed, 110 insertions, 0 deletions
diff --git a/scripts/rsync-brute.nse b/scripts/rsync-brute.nse
new file mode 100644
index 0000000..d605e20
--- /dev/null
+++ b/scripts/rsync-brute.nse
@@ -0,0 +1,110 @@
+local brute = require "brute"
+local creds = require "creds"
+local shortport = require "shortport"
+local stdnse = require "stdnse"
+
+local rsync = stdnse.silent_require "rsync"
+
+description = [[
+Performs brute force password auditing against the rsync remote file syncing protocol.
+]]
+
+---
+-- @usage
+-- nmap -p 873 --script rsync-brute --script-args 'rsync-brute.module=www' <ip>
+--
+-- @output
+-- PORT    STATE SERVICE REASON
+-- 873/tcp open  rsync   syn-ack
+-- | rsync-brute:
+-- |   Accounts
+-- |     user1:laptop - Valid credentials
+-- |     user2:password - Valid credentials
+-- |   Statistics
+-- |_    Performed 1954 guesses in 20 seconds, average tps: 97
+--
+-- @args rsync-brute.module - the module against which brute forcing should be performed
+
+
+
+author = "Patrik Karlsson"
+license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
+categories = {"brute", "intrusive"}
+
+portrule = shortport.port_or_service(873, "rsync", "tcp")
+
+Driver = {
+
+  new = function(self, host, port, options)
+    local o = { host = host, port = port, options = options }
+    setmetatable(o, self)
+    self.__index = self
+    return o
+  end,
+
+  connect = function(self)
+    self.helper = rsync.Helper:new(self.host, self.port, self.options)
+    return self.helper:connect(brute.new_socket())
+  end,
+
+  login = function(self, username, password)
+
+    local status, data = self.helper:login(username, password)
+    -- retry unless we have an authentication failed error
+    if( not(status) and data ~= "Authentication failed" ) then
+      local err = brute.Error:new( data )
+      err:setRetry( true )
+      return false, err
+    elseif ( not(status) ) then
+      return false, brute.Error:new( "Login failed" )
+    else
+      return true, creds.Account:new(username, password, creds.State.VALID)
+    end
+  end,
+
+  disconnect = function( self )
+    return self.helper:disconnect()
+  end
+
+}
+
+local function isModuleValid(host, port, module)
+  local helper = rsync.Helper:new(host, port, { module = module })
+  if ( not(helper) ) then
+    return false, "Failed to create helper"
+  end
+  local status, data = helper:connect()
+  if ( not(status) ) then
+    return false, "Failed to connect to server"
+  end
+  status, data = helper:login()
+  if ( status and data == "No authentication was required" ) then
+    return false, data
+  elseif ( not(status) and data == "Authentication required" ) then
+    return true
+  elseif ( not(status) and data == ("Unknown module '%s'"):format(module) ) then
+    return false, data
+  end
+  return false, ("Brute pre-check failed for unknown reason: (%s)"):format(data)
+end
+
+local function fail (err) return stdnse.format_output(false, err) end
+
+action = function(host, port)
+
+  local mod = stdnse.get_script_args(SCRIPT_NAME .. ".module")
+  if ( not(mod) ) then
+    return fail("rsync-brute.module was not supplied")
+  end
+
+  local status, err = isModuleValid(host, port, mod)
+  if ( not(status) ) then
+    return fail(err)
+  end
+
+  local engine = brute.Engine:new(Driver, host, port, { module = mod })
+  engine.options.script_name = SCRIPT_NAME
+  local result
+  status, result = engine:start()
+  return result
+end