CVE-2023-28506
📋 TL;DR
This CVE describes a stack-based buffer overflow vulnerability in Rocket Software's UniData and UniVerse database products. Attackers with valid login credentials can exploit this by providing specially crafted input that exceeds buffer limits, potentially leading to remote code execution. Organizations running vulnerable versions of these database servers are affected.
💻 Affected Systems
- Rocket Software UniData
- Rocket Software UniVerse
📦 What is this software?
Unidata by Rocketsoftware
Universe by Rocketsoftware
Universe by Rocketsoftware
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with the privileges of the UniRPC server process, potentially leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Denial of service through application crashes, with potential for limited code execution if exploit is refined.
If Mitigated
Application crash or instability without code execution if exploit attempts are detected and blocked.
🎯 Exploit Status
Exploitation requires valid credentials and knowledge of the vulnerable function. Buffer overflow is stack-based, which can be more predictable than heap-based overflows.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: UniData 8.2.4 build 3003 or later; UniVerse 11.3.5 build 1001 or later, or 12.2.1 build 2002 or later
Vendor Advisory: https://www.rocketsoftware.com/support/security-bulletins
Restart Required: Yes
Instructions:
1. Download the appropriate patch from Rocket Software support portal. 2. Apply the patch according to vendor documentation. 3. Restart the UniRPC server service. 4. Verify the patch is applied by checking version numbers.
🔧 Temporary Workarounds
Network Segmentation
linuxRestrict access to UniRPC server ports (typically 31438-31439) to only trusted networks and required clients.
Use firewall rules to limit access: iptables -A INPUT -p tcp --dport 31438:31439 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 31438:31439 -j DROP
Account Hardening
allImplement strong authentication controls and monitor for suspicious login attempts to reduce credential compromise risk.
Implement multi-factor authentication if supported
Set account lockout policies after failed attempts
🧯 If You Can't Patch
- Implement strict network segmentation to isolate UniData/UniVerse servers from untrusted networks
- Enforce principle of least privilege for database accounts and monitor for unusual authentication patterns
🔍 How to Verify
Check if Vulnerable:
Check UniData/UniVerse version: udtversion or uv command. Compare against vulnerable versions listed in affected_systems.Check Version:
udtversion (for UniData) or uv (for UniVerse) to display version informationVerify Fix Applied:
Verify version is at or above patched versions: UniData >= 8.2.4 build 3003, UniVerse >= 11.3.5 build 1001 or >= 12.2.1 build 2002.📡 Detection & Monitoring
Log Indicators:
- Unusual authentication patterns or failed login attempts
- UniRPC server crash logs or abnormal termination
- Process memory violation errors in system logs
Network Indicators:
- Unusual traffic patterns to UniRPC ports (31438-31439)
- Large or malformed RPC requests
SIEM Query:
source="unidata.log" OR source="universe.log" AND ("crash" OR "segmentation fault" OR "buffer overflow" OR "access violation")