CVE-2024-25812
📋 TL;DR
MyNET up to version 26.05 contains a reflected cross-site scripting (XSS) vulnerability in the src parameter. This allows attackers to inject malicious scripts that execute in users' browsers when they visit a crafted URL. Organizations using vulnerable MyNET versions are affected.
💻 Affected Systems
- MyNET
📦 What is this software?
Mynet by Airc
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, redirect users to malicious sites, perform actions on behalf of authenticated users, or deliver malware.
Likely Case
Session hijacking leading to unauthorized access, credential theft, or defacement of web pages.
If Mitigated
Limited impact if input validation and output encoding are properly implemented, though some risk remains.
🎯 Exploit Status
Reflected XSS vulnerabilities are commonly exploited with simple payloads; exploitation requires user interaction with a malicious link.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v26.06 or later
Vendor Advisory: https://www.airc.pt/solucoes-servicos/solucoes?segment=MYN
Restart Required: Yes
Instructions:
1. Download the latest MyNET version from the official vendor site. 2. Backup current configuration and data. 3. Install the update following vendor instructions. 4. Restart the MyNET service.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side validation to sanitize the src parameter by removing or encoding special characters.
Implement regex filter: /^[a-zA-Z0-9\-\.\/]+$/ for src parameter
Web Application Firewall (WAF)
allDeploy a WAF with XSS protection rules to block malicious requests containing script tags or JavaScript.
Enable XSS protection rules in WAF configuration
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution sources.
- Disable or restrict access to the vulnerable endpoint if not essential for operations.
🔍 How to Verify
Check if Vulnerable:
Test by injecting a simple XSS payload like <script>alert('XSS')</script> into the src parameter and check if it executes in the browser.Check Version:
Check MyNET version via admin interface or configuration file; command varies by installation.Verify Fix Applied:
After patching, retest with the same XSS payload; it should be sanitized or blocked without execution.📡 Detection & Monitoring
Log Indicators:
- Log entries showing src parameter with script tags or JavaScript code
- Unusual requests to the vulnerable endpoint
Network Indicators:
- HTTP requests with src parameter containing suspicious strings like <script> or javascript:
SIEM Query:
source="mynet_logs" AND (src="*<script>*" OR src="*javascript:*")