CVE-2023-36647
📋 TL;DR
CVE-2023-36647 is a critical authentication bypass vulnerability in ProLion CryptoSpike where a hard-coded private key allows attackers to forge JWT tokens. This enables complete impersonation of any user or role with administrative privileges. Organizations running vulnerable CryptoSpike versions are affected.
💻 Affected Systems
- ProLion CryptoSpike
📦 What is this software?
Cryptospike by Prolion
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the CryptoSpike system allowing attackers to impersonate administrators, access sensitive data, modify configurations, and potentially pivot to connected storage systems.
Likely Case
Attackers gain administrative access to the web management interface and REST API, enabling data exfiltration, configuration changes, and privilege escalation across the storage security environment.
If Mitigated
With proper network segmentation and access controls, impact is limited to the CryptoSpike management plane, though authentication bypass remains a critical issue.
🎯 Exploit Status
Exploitation requires only knowledge of the hard-coded key and basic JWT manipulation skills. No authentication needed to exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Contact ProLion for patched version
Vendor Advisory: https://www.cvcn.gov.it/cvcn/cve/CVE-2023-36647
Restart Required: Yes
Instructions:
1. Contact ProLion support for patched version. 2. Backup current configuration. 3. Apply patch following vendor instructions. 4. Restart CryptoSpike services. 5. Verify new JWT keys are generated.
🔧 Temporary Workarounds
Network Isolation
allRestrict access to CryptoSpike management interfaces to trusted IPs only
Use firewall rules to restrict access to CryptoSpike ports (typically 443/TCP)
API Rate Limiting
allImplement rate limiting on REST API endpoints to detect brute force attempts
Configure web server or application firewall to limit requests per IP
🧯 If You Can't Patch
- Implement strict network segmentation to isolate CryptoSpike from internet and untrusted networks
- Deploy a WAF with JWT validation rules and anomaly detection for API endpoints
🔍 How to Verify
Check if Vulnerable:
Check CryptoSpike version via web interface or configuration files. If version is 3.0.15P2, system is vulnerable.Check Version:
Check web interface or consult ProLion documentation for version check commandVerify Fix Applied:
Verify new JWT tokens are being signed with unique, non-hardcoded keys. Test authentication with invalid tokens to ensure they are rejected.📡 Detection & Monitoring
Log Indicators:
- Failed JWT validations with invalid signatures
- Multiple authentication attempts from single source
- Administrative actions from unusual IPs
Network Indicators:
- Unusual API call patterns
- Authentication requests bypassing normal login flow
- JWT tokens with identical signatures
SIEM Query:
source="cryptospike" AND (event_type="auth_failure" OR event_type="admin_action") | stats count by src_ip