CVE-2023-30222
📋 TL;DR
This vulnerability in 4D SAS 4D Server allows attackers to eavesdrop on network traffic and retrieve password hashes for all users. It affects 4D Server Application v17, v18, and v19 R7 and earlier versions. Attackers can potentially crack these hashes to gain unauthorized access.
💻 Affected Systems
- 4D SAS 4D Server Application
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers obtain all user password hashes, crack them offline, gain administrative access, and compromise the entire database server and connected systems.
Likely Case
Attackers capture password hashes for regular users, crack weaker passwords, and gain unauthorized access to sensitive data within the database.
If Mitigated
With network segmentation and strong password policies, attackers may obtain hashes but cannot crack them or reach vulnerable systems.
🎯 Exploit Status
Exploitation requires network access to intercept traffic; tools for packet capture are widely available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v19 R8 and later, v20 and later
Vendor Advisory: https://blog.4d.com/security-bulletin-two-cves-and-how-to-stay-secure/
Restart Required: Yes
Instructions:
1. Download the latest version from 4D's official website. 2. Stop the 4D Server service. 3. Install the update. 4. Restart the service.
🔧 Temporary Workarounds
Network Segmentation
allIsolate 4D Server from untrusted networks to prevent eavesdropping.
Encrypted Communication
allForce TLS/SSL encryption for all client-server communications if supported.
🧯 If You Can't Patch
- Implement strict network access controls to limit who can communicate with the 4D Server.
- Enforce strong password policies and multi-factor authentication to mitigate hash cracking impact.
🔍 How to Verify
Check if Vulnerable:
Check the 4D Server version in the administration interface or via command line: 4D --versionCheck Version:
4D --versionVerify Fix Applied:
Verify the version is v19 R8 or later, or v20 or later, and test that password hashes are no longer transmitted in cleartext.📡 Detection & Monitoring
Log Indicators:
- Unusual network traffic patterns, failed authentication attempts from new IPs
Network Indicators:
- Unencrypted authentication traffic to/from 4D Server port (default 19812)
SIEM Query:
source_ip="4D_Server_IP" AND (port=19812 OR protocol="TCP") AND packet_size>100🔗 References
- https://blog.4d.com/security-bulletin-two-cves-and-how-to-stay-secure/
- https://packetstormsecurity.com
- https://www.infigo.is/en/insights/42/information-disclosure-and-broken-authentication-in-4d-sas-4d-server/
- https://blog.4d.com/security-bulletin-two-cves-and-how-to-stay-secure/
- https://packetstormsecurity.com
- https://www.infigo.is/en/insights/42/information-disclosure-and-broken-authentication-in-4d-sas-4d-server/
