CVE-2023-5921
📋 TL;DR
This vulnerability allows attackers to bypass intended functionality in DECE Software Geodi by exploiting improper enforcement of behavioral workflows. It affects all Geodi installations running versions before 8.0.0.27396, potentially enabling unauthorized actions or access.
💻 Affected Systems
- DECE Software Geodi
📦 What is this software?
Geodi by Decesoftware
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to bypass critical security controls, execute unauthorized operations, or access restricted functionality.
Likely Case
Partial functionality bypass enabling attackers to perform actions they shouldn't be authorized for, potentially leading to data exposure or unauthorized changes.
If Mitigated
Limited impact with proper network segmentation and access controls, though some functionality bypass may still occur within authorized contexts.
🎯 Exploit Status
CWE-841 typically requires some understanding of the application's workflow logic to exploit effectively.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.0.0.27396 or later
Vendor Advisory: https://www.usom.gov.tr/bildirim/tr-23-0650
Restart Required: Yes
Instructions:
1. Download Geodi version 8.0.0.27396 or later from DECE Software. 2. Backup current installation and data. 3. Install the updated version following vendor instructions. 4. Restart Geodi services. 5. Verify functionality.
🔧 Temporary Workarounds
Network Isolation
linuxRestrict network access to Geodi to only trusted sources
firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="TRUSTED_IP" port port="GEODI_PORT" protocol="tcp" accept'
firewall-cmd --reload
Access Control Tightening
allImplement strict role-based access controls within Geodi
🧯 If You Can't Patch
- Implement network segmentation to isolate Geodi from untrusted networks
- Enable detailed logging and monitoring for suspicious workflow bypass attempts
🔍 How to Verify
Check if Vulnerable:
Check Geodi version in administration interface or configuration files. If version is below 8.0.0.27396, system is vulnerable.Check Version:
Check Geodi web interface → Administration → About or examine configuration files for version informationVerify Fix Applied:
Verify Geodi version is 8.0.0.27396 or higher and test critical workflows to ensure proper enforcement.📡 Detection & Monitoring
Log Indicators:
- Unusual workflow completion patterns
- Authorization bypass attempts in audit logs
- Unexpected user actions outside normal workflow
Network Indicators:
- Unusual API calls to workflow endpoints
- Requests attempting to skip workflow steps
SIEM Query:
source="geodi_logs" AND (event_type="workflow_bypass" OR action="unauthorized_workflow_skip")