CVE-2020-4567
📋 TL;DR
IBM Tivoli Key Lifecycle Manager 3.0.1 and 4.0 have an inadequate account lockout setting that allows remote attackers to perform brute-force attacks against user credentials. This vulnerability affects all systems running these versions of the software, potentially compromising administrative accounts and cryptographic key management.
💻 Affected Systems
- IBM Tivoli Key Lifecycle Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the key management system, allowing attackers to steal or manipulate cryptographic keys, decrypt sensitive data, and impersonate legitimate users across connected systems.
Likely Case
Unauthorized access to administrative accounts leading to data exfiltration, key theft, and potential lateral movement to connected systems.
If Mitigated
Failed login attempts with no successful compromise if proper account lockout policies and monitoring are implemented.
🎯 Exploit Status
Brute-force attacks are well-understood and easily automated. No authentication is required to attempt credential guessing.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply interim fix or upgrade as specified in IBM advisory
Vendor Advisory: https://www.ibm.com/support/pages/node/6253781
Restart Required: Yes
Instructions:
1. Review IBM advisory for specific patch details. 2. Apply the interim fix or upgrade to a fixed version. 3. Restart the Tivoli Key Lifecycle Manager service. 4. Verify the fix by testing account lockout functionality.
🔧 Temporary Workarounds
Implement Strong Account Lockout Policy
allConfigure account lockout after a small number of failed attempts with appropriate lockout duration
Configure via Tivoli Key Lifecycle Manager administration console or configuration files
Network Access Restrictions
allRestrict access to Tivoli Key Lifecycle Manager to trusted IP addresses only
Configure firewall rules to limit access to specific source IPs
🧯 If You Can't Patch
- Implement network segmentation and restrict access to only necessary users and systems
- Enable comprehensive logging and monitoring for failed login attempts and implement alerting
🔍 How to Verify
Check if Vulnerable:
Check if running IBM Tivoli Key Lifecycle Manager 3.0.1 or 4.0 and review account lockout settings in administration consoleCheck Version:
Check version via Tivoli Key Lifecycle Manager administration interface or installation directoryVerify Fix Applied:
Test account lockout functionality by attempting multiple failed logins and verifying lockout occurs📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts from same source IP
- Account lockout events
- Successful logins after many failed attempts
Network Indicators:
- High volume of authentication requests to Tivoli Key Lifecycle Manager ports
- Brute-force patterns in network traffic
SIEM Query:
source="tivoli_logs" AND (event_type="failed_login" COUNT > 5 WITHIN 5min) OR event_type="account_lockout"