CVE-2024-41514
📋 TL;DR
A reflected cross-site scripting (XSS) vulnerability in CADClick's PrevPgGroup.aspx page allows attackers to inject malicious scripts via the 'wer' parameter. This affects CADClick v1.11.0 and earlier versions, potentially compromising users who access specially crafted URLs.
💻 Affected Systems
- CADClick
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users, potentially leading to account takeover or data theft.
Likely Case
Attackers craft phishing emails with malicious links that execute scripts in victims' browsers, stealing session tokens or redirecting to credential harvesting pages.
If Mitigated
With proper input validation and output encoding, the vulnerability would be neutralized, preventing script execution even with malicious input.
🎯 Exploit Status
Reflected XSS vulnerabilities are typically easy to exploit with basic web knowledge. No authentication required to trigger the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://cadclick.de/
Restart Required: No
Instructions:
1. Check vendor website for updates. 2. If patch available, download and install. 3. Verify fix by testing the vulnerable parameter.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side input validation to sanitize the 'wer' parameter before processing.
Implement regex filtering: ^[a-zA-Z0-9_-]+$ for the wer parameter
Output Encoding
allApply proper HTML encoding to all user-controlled output in the PrevPgGroup.aspx page.
Use HTML encoding functions: Server.HtmlEncode(wer) in ASP.NET
🧯 If You Can't Patch
- Implement a web application firewall (WAF) with XSS protection rules
- Restrict access to the vulnerable page using network segmentation or authentication
🔍 How to Verify
Check if Vulnerable:
Access PrevPgGroup.aspx?wer=<script>alert('XSS')</script> and check if script executesCheck Version:
Check CADClick version in application interface or configuration filesVerify Fix Applied:
Test the same payload after applying fixes - script should not execute and should be displayed as plain text📡 Detection & Monitoring
Log Indicators:
- HTTP requests to PrevPgGroup.aspx with script tags or encoded payloads in wer parameter
- Unusual length or character patterns in wer parameter values
Network Indicators:
- HTTP requests containing <script> tags in URL parameters
- Requests to PrevPgGroup.aspx with suspicious parameter values
SIEM Query:
source="web_logs" AND uri="*PrevPgGroup.aspx*" AND (query="*<script>*" OR query="*javascript:*")