CVE-2023-1837
📋 TL;DR
This vulnerability allows attackers to bypass authentication in HYPR Server by exploiting missing authentication checks in Legacy APIs. It affects all HYPR Server versions before 8.0 when Legacy APIs are enabled, potentially compromising the entire authentication system.
💻 Affected Systems
- HYPR Server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise where attackers gain administrative access to HYPR Server, potentially accessing all user credentials and authentication data, leading to widespread account takeovers.
Likely Case
Attackers bypass authentication to access sensitive user data, modify authentication policies, or impersonate legitimate users within the system.
If Mitigated
Limited impact with proper network segmentation and Legacy APIs disabled, though any enabled Legacy APIs remain vulnerable.
🎯 Exploit Status
Authentication bypass vulnerabilities typically have low exploitation complexity once the vulnerable endpoint is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.0 or later
Vendor Advisory: https://www.hypr.com/security-advisories
Restart Required: Yes
Instructions:
1. Upgrade HYPR Server to version 8.0 or later. 2. Restart the HYPR Server service. 3. Verify Legacy APIs are properly secured or disabled.
🔧 Temporary Workarounds
Disable Legacy APIs
allDisable all Legacy APIs in HYPR Server configuration to eliminate the attack surface
# Check HYPR Server configuration for Legacy API settings
# Set legacy_api_enabled = false in configuration
Network Segmentation
allRestrict network access to HYPR Server Legacy API endpoints
# Configure firewall rules to block external access to Legacy API ports
# Implement network segmentation for HYPR Server
🧯 If You Can't Patch
- Immediately disable all Legacy APIs in HYPR Server configuration
- Implement strict network access controls and monitor all traffic to HYPR Server Legacy API endpoints
🔍 How to Verify
Check if Vulnerable:
Check HYPR Server version and verify if Legacy APIs are enabled in configuration. Versions before 8.0 with Legacy APIs enabled are vulnerable.Check Version:
# Check HYPR Server version via admin interface or configuration filesVerify Fix Applied:
Verify HYPR Server version is 8.0 or later, and confirm Legacy APIs either have proper authentication or are disabled.📡 Detection & Monitoring
Log Indicators:
- Unauthenticated access attempts to Legacy API endpoints
- Authentication bypass patterns in access logs
- Unusual administrative actions from unexpected sources
Network Indicators:
- Traffic to Legacy API endpoints without authentication headers
- Unusual API call patterns to authentication endpoints
SIEM Query:
source="hypr_server" AND (endpoint="*legacy*" OR endpoint="*api*" AND NOT auth_success="true")