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Current Path : /proc/2/root/usr/share/nmap/scripts/
Current File : //proc/2/root/usr/share/nmap/scripts/netbus-auth-bypass.nse
description = [[
Checks if a NetBus server is vulnerable to an authentication bypass
vulnerability which allows ful access without knowing the password.

For example a server running on TCP port 12345 on localhost with
this vulnerability is accessible to anyone. An attacker could
simply form a connection to the server ( ncat -C 127.0.0.1 12345 )
and login to the service by typing Password;1; into the console.
]]

---
-- @usage
-- nmap -p 12345 --script netbus-auth-bypass <target>
--
-- @output
-- 12345/tcp open  netbus
-- |_netbus-auth-bypass: Vulnerable

author = "Toni Ruottu"
license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"auth", "safe", "vuln"}

require("nmap")
require("stdnse")
require("shortport")

dependencies = {"netbus-version", "netbus-brute", "netbus-info"}

portrule = shortport.port_or_service (12345, "netbus", {"tcp"})

action = function( host, port )

	local socket = nmap.new_socket()
	local status, err = socket:connect(host.ip, port.number)
	if not status then
		return
	end
	local buffer, _ = stdnse.make_buffer(socket, "\r")
	buffer() --discard banner

	-- The first argument of Password is the super-login bit.
	-- On vulnerable servers any password will do as long as
	-- we send the super-login bit. Regular NetBus has only
	-- one password. Thus, if we can login with two different
	-- passwords using super-login, the server is vulnerable.

	socket:send("Password;1;\r") --password: empty
	if buffer() ~= "Access;1" then
		return
	end
	socket:send("Password;1; \r") --password: space
	if buffer() == "Access;1" then
		return "Vulnerable"
	end
	return "Not vulnerable, but password is empty"
end
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