CVE-2021-20389
📋 TL;DR
IBM Security Guardium 11.2 stores user credentials in plain text, allowing local users to read sensitive authentication data. This affects all deployments of IBM Security Guardium 11.2 where local user access exists. The vulnerability enables credential theft and potential privilege escalation.
💻 Affected Systems
- IBM Security Guardium
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Local attackers gain administrative credentials, leading to complete system compromise, data exfiltration, and lateral movement within the network.
Likely Case
Malicious insiders or compromised local accounts steal credentials to escalate privileges and access sensitive Guardium data.
If Mitigated
With strict local access controls and monitoring, impact is limited to credential exposure without successful exploitation.
🎯 Exploit Status
Exploitation requires local access but is trivial once obtained - attackers simply need to read the plain text credential files.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply fix from IBM Security Bulletin
Vendor Advisory: https://www.ibm.com/support/pages/node/6455281
Restart Required: Yes
Instructions:
1. Review IBM Security Bulletin. 2. Apply the fix provided by IBM. 3. Restart Guardium services. 4. Verify credentials are now encrypted.
🔧 Temporary Workarounds
Restrict Local Access
allLimit local user access to Guardium systems to only authorized administrators
Monitor Credential Files
allImplement file integrity monitoring on Guardium credential storage locations
🧯 If You Can't Patch
- Implement strict least privilege access controls for all local accounts
- Deploy enhanced monitoring and alerting for unauthorized access to credential files
🔍 How to Verify
Check if Vulnerable:
Check if Guardium version is 11.2 and examine credential storage files for plain text contentCheck Version:
Check Guardium administration console or run appropriate version command for your deploymentVerify Fix Applied:
After applying IBM fix, verify credentials are encrypted and cannot be read in plain text📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to credential files
- Multiple failed login attempts followed by successful access
Network Indicators:
- Unusual authentication patterns from local system accounts
SIEM Query:
source="guardium" AND (event_type="file_access" AND file_path="*credential*" OR file_path="*password*")