CVE-2024-3790
📋 TL;DR
This stored XSS vulnerability in WBSAirback 21.02.04 allows attackers to inject malicious scripts through user management fields. When exploited, it can steal session data from authenticated administrators. Organizations using this specific version of WBSAirback are affected.
💻 Affected Systems
- WBSAirback
📦 What is this software?
Wbsairback by Whitebearsolutions
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of administrative accounts leading to full system takeover, data theft, and potential ransomware deployment.
Likely Case
Session hijacking allowing unauthorized access to administrative functions and potential data exfiltration.
If Mitigated
Limited impact with proper input validation and output encoding preventing script execution.
🎯 Exploit Status
Requires authenticated access to admin interface; exploitation involves injecting scripts into user management fields
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to version later 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. Backup current configuration and data. 2. Download latest WBSAirback version from vendor. 3. Follow vendor upgrade documentation. 4. Restart WBSAirback services. 5. Verify functionality.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side input validation to sanitize user input in login, description, passwd1, and passwd2 fields
Content Security Policy
allImplement strict CSP headers to prevent script execution from untrusted sources
Add 'Content-Security-Policy: default-src 'self'; script-src 'self'' to web server configuration
🧯 If You Can't Patch
- Restrict access to /admin/SystemUsers interface using network ACLs or firewall rules
- Implement web application firewall with XSS protection rules
🔍 How to Verify
Check if Vulnerable:
Check WBSAirback version via admin interface or configuration files; version 21.02.04 is vulnerableCheck Version:
Check WBSAirback web interface or configuration files for version informationVerify Fix Applied:
Verify version is updated beyond 21.02.04 and test XSS payloads no longer execute📡 Detection & Monitoring
Log Indicators:
- Unusual script tags or JavaScript in user management fields
- Multiple failed login attempts followed by successful admin login
Network Indicators:
- HTTP POST requests to /admin/SystemUsers with script payloads
- Unexpected outbound connections from WBSAirback server
SIEM Query:
source="wbsairback.log" AND ("script" OR "javascript" OR "onload" OR "onerror") AND uri="/admin/SystemUsers"