1 files changed, 112 insertions, 0 deletions
diff --git a/scripts/openvas-otp-brute.nse b/scripts/openvas-otp-brute.nse
new file mode 100644
index 0000000..6cca909
--- /dev/null
+++ b/scripts/openvas-otp-brute.nse
@@ -0,0 +1,112 @@
+local brute = require "brute"
+local creds = require "creds"
+local match = require "match"
+local shortport = require "shortport"
+local stdnse = require "stdnse"
+local string = require "string"
+
+local openssl = stdnse.silent_require "openssl"
+
+description=[[
+Performs brute force password auditing against a OpenVAS vulnerability scanner daemon using the OTP 1.0 protocol.
+]]
+
+---
+-- @output
+-- PORT     STATE SERVICE    REASON  VERSION
+-- 9391/tcp open  ssl/openvas syn-ack
+-- | openvas-otp-brute:
+-- |   Accounts
+-- |     openvas:openvas - Valid credentials
+-- |   Statistics
+-- |_    Performed 4 guesses in 4 seconds, average tps: 1
+--
+-- @args openvas-otp-brute.threads sets the number of threads. Default: 4
+
+author = "Vlatko Kosturjak"
+
+license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
+
+categories = {"intrusive", "brute"}
+
+
+portrule = shortport.port_or_service({9390,9391}, "openvas", "tcp")
+
+Driver =
+{
+  new = function (self, host, port)
+    local o = { host = host, port = port }
+    setmetatable (o,self)
+    self.__index = self
+    return o
+  end,
+
+  connect = function ( self )
+    self.socket = brute.new_socket()
+    if ( not(self.socket:connect(self.host, self.port, "ssl")) ) then
+      return false
+    end
+    return true
+  end,
+
+  login = function( self, username, password )
+    local status, err = self.socket:send("< OTP/1.0 >\n")
+
+    if ( not ( status ) ) then
+      local err = brute.Error:new( "Unable to send handshake" )
+      err:setAbort(true)
+      return false, err
+    end
+
+    local response
+    status, response = self.socket:receive_buf(match.pattern_limit("\r?\n", 2048), false)
+    if ( not(status) or response ~= "< OTP/1.0 >" ) then
+      local err = brute.Error:new( "Bad handshake from server: "..response )
+      err:setAbort(true)
+      return false, err
+    end
+
+    status, err = self.socket:send(username.."\n")
+    if ( not(status) ) then
+      local err = brute.Error:new( "Couldn't send user: "..username )
+      err:setAbort( true )
+      return false, err
+    end
+
+    status, err = self.socket:send(password.."\n")
+    if ( not(status) ) then
+      local err = brute.Error:new( "Couldn't send password: "..password )
+      err:setAbort( true )
+      return false, err
+    end
+
+    -- Create a buffer and receive the first line
+    local line
+    status, line = self.socket:receive_buf(match.pattern_limit("\r?\n", 2048), false)
+
+    if (line == nil or string.match(line,"Bad login")) then
+      stdnse.debug2("Bad login: %s/%s", username, password)
+      return false, brute.Error:new( "Bad login" )
+    elseif (string.match(line,"SERVER <|>")) then
+
+      stdnse.debug1("Good login: %s/%s", username, password)
+      return true, creds.Account:new(username, password, creds.State.VALID)
+    end
+
+    stdnse.debug1("WARNING: Unhandled response: %s", line)
+    return false, brute.Error:new( "unhandled response" )
+  end,
+
+  disconnect = function( self )
+    self.socket:close()
+  end,
+}
+
+action = function(host, port)
+  local engine = brute.Engine:new(Driver, host, port)
+  engine:setMaxThreads(1)
+  engine.options.script_name = SCRIPT_NAME
+  local status, result = engine:start()
+  return result
+end
+