QiHang Media Web (QH.aspx) Digital Signage 3.0.9 (pre-auth) Remote Code Execution

Title: QiHang Media Web (QH.aspx) Digital Signage 3.0.9 (pre-auth) Remote Code Execution
Advisory ID: ZSL-2020-5582
Type: Local/Remote
Impact: System Access, DoS
Risk: (5/5)
Release Date: 13.08.2020
Digital Signage Software.
The application suffers from an unauthenticated remote code execution. The vulnerability is caused due to lack of verification when uploading files with QH.aspx that can be written in any location by utilizing the 'remotePath' parameter to traverse through directories. Abusing the upload action and the 'fileToUpload' parameter, an unauthenticated attacker can exploit this to execute system commands by uploading a malicious ASPX script.
Shenzhen Xingmeng Qihang Media Co., Ltd. | Guangzhou Hefeng Automation Technology Co., Ltd. - http://www.howfor.com
Affected Version
Tested On
Microsoft Windows Server 2012 R2 Datacenter
Microsoft Windows Server 2003 Enterprise Edition
ASP.NET 4.0.30319
HowFor Web Server/
Microsoft ASP.NET Web QiHang IIS Server
Vendor Status
[27.07.2020] Vulnerability discovered.
[28.07.2020] Vendor contacted.
[31.07.2020] No response from the vendor.
[10.08.2020] Vendor contacted.
[12.08.2020] No response from the vendor.
[13.08.2020] Public security advisory released.
Vulnerability discovered by Gjoko Krstic - <gjoko@zeroscience.mk>
[1] https://packetstormsecurity.com/files/158862/QiHang-Media-Web-Digital-Signage-3.0.9-Remote-Code-Execution.html
[2] https://cxsecurity.com/issue/WLB-2020080060
[3] https://exchange.xforce.ibmcloud.com/vulnerabilities/186771
[4] https://www.exploit-db.com/exploits/48751
[13.08.2020] - Initial release
[14.08.2020] - Added reference [1] and [2]
[16.08.2020] - Added reference [3]
[18.08.2020] - Added reference [4]
Zero Science Lab

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e-mail: lab@zeroscience.mk