CVE-2023-4667
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in PAC Device web interfaces allows administrators to inject malicious scripts into form fields. When other users access the administration interface, these scripts execute in their browsers, potentially compromising their sessions. All users of the affected PAC Device web administration interface are at risk.
💻 Affected Systems
- PAC Device
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, hijack administrative sessions, install backdoors, exfiltrate sensitive configuration data, or pivot to internal network systems.
Likely Case
Session hijacking leading to unauthorized administrative access, data leakage of device configurations, and potential privilege escalation within the web interface.
If Mitigated
Limited to interface disruption or minor data exposure if proper network segmentation and access controls are implemented.
🎯 Exploit Status
Requires administrator credentials for initial script injection, but subsequent exploitation affects all interface users automatically.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.idemia.com/vulnerability-information
Restart Required: Yes
Instructions:
1. Check vendor advisory for firmware updates. 2. Download latest firmware from vendor portal. 3. Backup current configuration. 4. Apply firmware update via web interface. 5. Verify update completion and restore configuration if needed.
🔧 Temporary Workarounds
Input Validation Enhancement
allImplement server-side input validation to sanitize all user inputs in web interface fields
Custom implementation required based on web framework
Output Encoding
allApply proper output encoding to all dynamic content rendered in the web interface
Custom implementation required based on templating system
🧯 If You Can't Patch
- Restrict administrative access to trusted users only and implement strict access controls
- Implement web application firewall (WAF) rules to detect and block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Test by attempting to inject basic XSS payloads (like <script>alert('test')</script>) into administrator-accessible form fields and checking if they execute when other users view the interface.Check Version:
Check firmware version in web interface under System > About or similar menuVerify Fix Applied:
After patching, repeat XSS injection tests to confirm payloads are properly sanitized and do not execute.📡 Detection & Monitoring
Log Indicators:
- Unusual script tags or JavaScript in form submissions
- Multiple failed login attempts followed by successful admin login
- Administrative actions from unexpected IP addresses
Network Indicators:
- HTTP requests containing suspicious script tags or JavaScript in POST parameters
- Unusual outbound connections from the device after administrative access
SIEM Query:
source="pac_device_logs" AND (message="*<script>*" OR message="*javascript:*" OR message="*onload=*" OR message="*onerror=*")