CVE-2020-4688
📋 TL;DR
This CVE describes a command injection vulnerability in IBM Security Guardium that allows a local attacker to execute arbitrary commands on the system as an unprivileged user. The vulnerability affects IBM Security Guardium versions 10.6 and 11.2, potentially allowing attackers to gain unauthorized access and control over affected systems.
💻 Affected Systems
- IBM Security Guardium
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with privilege escalation to root/admin, data exfiltration, installation of persistent backdoors, and lateral movement to other systems.
Likely Case
Local privilege escalation allowing attackers to execute commands with higher privileges than intended, potentially accessing sensitive Guardium data and configurations.
If Mitigated
Limited impact if proper access controls, network segmentation, and monitoring are in place, with attackers only able to execute commands within restricted user context.
🎯 Exploit Status
Requires local access to the Guardium system; command injection vulnerabilities typically have low exploitation complexity once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply fixes as specified in IBM Security Bulletin
Vendor Advisory: https://www.ibm.com/support/pages/node/6405952
Restart Required: Yes
Instructions:
1. Review IBM Security Bulletin for specific patch details. 2. Apply the recommended fix from IBM. 3. Restart the Guardium system as required. 4. Verify the fix is properly applied.
🔧 Temporary Workarounds
Restrict Local Access
allLimit local access to Guardium systems to authorized administrators only
Implement Least Privilege
allEnsure users have only necessary permissions and cannot execute arbitrary commands
🧯 If You Can't Patch
- Implement strict access controls to limit who can access Guardium systems locally
- Deploy network segmentation to isolate Guardium systems from other critical infrastructure
🔍 How to Verify
Check if Vulnerable:
Check Guardium version using the Guardium CLI or web interface and compare against affected versions (10.6, 11.2)Check Version:
gdp version (on Guardium CLI) or check via Guardium web interfaceVerify Fix Applied:
Verify the applied fix version matches or exceeds the patched version specified in IBM's advisory📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns
- Privilege escalation attempts
- Suspicious user activity on Guardium systems
Network Indicators:
- Unusual outbound connections from Guardium systems
- Unexpected data transfers
SIEM Query:
source="guardium" AND (event_type="command_execution" OR user_privilege_change="true")