CVE-2024-41516
📋 TL;DR
A reflected cross-site scripting (XSS) vulnerability in CADClick's ccHandler.aspx allows attackers to inject malicious scripts via the 'bomid' parameter. This affects all users of CADClick version 1.11.0 and earlier who access vulnerable instances.
💻 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 if the application handles sensitive data.
Likely Case
Attackers craft malicious links containing XSS payloads that execute when victims click them, potentially stealing session tokens or displaying phishing content.
If Mitigated
With proper input validation and output encoding, the malicious scripts would be neutralized before execution.
🎯 Exploit Status
Reflected XSS vulnerabilities are commonly exploited via phishing emails or malicious links.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://cadclick.de/
Restart Required: No
Instructions:
1. Contact vendor for updated version. 2. Apply vendor-provided patch. 3. Test functionality after patching.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side validation to sanitize the bomid parameter
Implement regex validation: ^[a-zA-Z0-9_-]+$ for bomid parameter
Web Application Firewall (WAF)
allDeploy WAF rules to block XSS payloads in URL parameters
Configure WAF to block patterns like <script>, javascript:, and onerror=
🧯 If You Can't Patch
- Restrict access to ccHandler.aspx to trusted IP addresses only
- Implement Content Security Policy (CSP) headers to restrict script execution
🔍 How to Verify
Check if Vulnerable:
Test by accessing ccHandler.aspx?bomid=<script>alert('XSS')</script> and checking if script executesCheck Version:
Check CADClick version in application interface or configuration filesVerify Fix Applied:
Retest with same payload after fixes; script should not execute and input should be sanitized📡 Detection & Monitoring
Log Indicators:
- HTTP requests to ccHandler.aspx with suspicious bomid parameter values containing script tags or JavaScript
Network Indicators:
- Unusual spikes in requests to ccHandler.aspx endpoint
- Requests containing XSS payload patterns in URL parameters
SIEM Query:
source="web_logs" AND uri="*ccHandler.aspx*" AND (param="*<script>*" OR param="*javascript:*" OR param="*onerror=*")