CVE-2024-3794
📋 TL;DR
This vulnerability allows stored cross-site scripting (XSS) attacks in WBSAirback 21.02.04 through the description field in the /admin/AdvancedSystem interface. Attackers can inject malicious scripts that execute when administrators view the affected page, potentially stealing session cookies and authentication tokens. Organizations using WBSAirback 21.02.04 are affected.
💻 Affected Systems
- WBSAirback
📦 What is this software?
Wbsairback by Whitebearsolutions
⚠️ Risk & Real-World Impact
Worst Case
Administrator session hijacking leading to full system compromise, data theft, or ransomware deployment
Likely Case
Session cookie theft allowing attacker to impersonate administrators and access sensitive backup data
If Mitigated
Limited impact due to proper input validation and output encoding preventing script execution
🎯 Exploit Status
Requires authenticated admin access to inject XSS payloads into description field
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Later versions than 21.02.04
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-wbsairback-white-bear-solutions
Restart Required: Yes
Instructions:
1. Check current WBSAirback version. 2. Upgrade to latest version from White Bear Solutions. 3. Restart WBSAirback services. 4. Verify fix by testing XSS payloads in description field.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side input validation to sanitize description field inputs
# Requires custom WBSAirback configuration or modification
Content Security Policy
allImplement CSP headers to restrict script execution
# Add to web server configuration: Content-Security-Policy: script-src 'self'
🧯 If You Can't Patch
- Restrict admin interface access to trusted IP addresses only
- Implement web application firewall (WAF) with XSS protection rules
🔍 How to Verify
Check if Vulnerable:
Test by entering <script>alert('XSS')</script> in description field of /admin/AdvancedSystem and checking if script executesCheck Version:
# Check WBSAirback version in admin interface or configuration filesVerify Fix Applied:
After patching, test same XSS payload to confirm it's properly sanitized or blocked📡 Detection & Monitoring
Log Indicators:
- Unusual script tags or JavaScript in description field submissions
- Multiple failed XSS attempts in admin logs
Network Indicators:
- HTTP requests with script tags in POST data to /admin/AdvancedSystem
SIEM Query:
source="wbsairback" AND (uri="/admin/AdvancedSystem" AND (body="<script>" OR body="javascript:"))