CVE-2023-2904
📋 TL;DR
This vulnerability in HID SAFE's External Visitor Manager portal allows authenticated attackers to manipulate visitor IDs in the web API to access other users' personal data. It also enables denial-of-service attacks due to unlimited API requests. Organizations using HID SAFE versions 5.8.0 through 5.11.3 are affected.
💻 Affected Systems
- HID SAFE
📦 What is this software?
Safe by Hidglobal
⚠️ Risk & Real-World Impact
Worst Case
Mass data breach of all visitor personal information and complete service disruption through DoS attacks
Likely Case
Unauthorized access to visitor personal data and potential service degradation
If Mitigated
Limited data exposure if proper access controls and rate limiting are implemented
🎯 Exploit Status
Requires valid credentials but exploitation is straightforward once authenticated
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.11.4 or later
Vendor Advisory: https://www.cisa.gov/news-events/ics-advisories/icsa-23-152-02
Restart Required: Yes
Instructions:
1. Download HID SAFE version 5.11.4 or later from HID support portal. 2. Backup current configuration and data. 3. Apply the update following HID's installation guide. 4. Restart the HID SAFE services.
🔧 Temporary Workarounds
Implement API Rate Limiting
allConfigure web server or application firewall to limit requests per user/session
Restrict External Visitor Manager Access
allLimit network access to the External Visitor Manager portal to trusted IP ranges only
🧯 If You Can't Patch
- Implement strict access controls and monitor for unusual API request patterns
- Deploy web application firewall with IDOR protection and rate limiting rules
🔍 How to Verify
Check if Vulnerable:
Check HID SAFE version in administration console or configuration filesCheck Version:
Check HID SAFE web interface or consult system documentationVerify Fix Applied:
Confirm version is 5.11.4 or later and test API parameter manipulation📡 Detection & Monitoring
Log Indicators:
- Multiple rapid API requests from single user
- Visitor ID parameter manipulation in API logs
- Unauthorized data access attempts
Network Indicators:
- Unusual API request patterns to visitor endpoints
- High volume of requests to HID SAFE web server
SIEM Query:
source="hid_safe" AND (event_type="api_request" AND (parameter="visitor-id" OR rate_threshold>1000))