CVE-2021-29750
📋 TL;DR
IBM QRadar SIEM versions 7.3 and 7.4 use weak cryptographic algorithms that could allow attackers to decrypt sensitive information. This affects organizations using these specific QRadar versions for security monitoring and log management.
💻 Affected Systems
- IBM QRadar SIEM
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers decrypt highly sensitive security data, including credentials, configuration secrets, and log contents, potentially compromising the entire security monitoring infrastructure.
Likely Case
Attackers with network access decrypt intercepted sensitive data, gaining unauthorized access to security information and potentially pivoting to other systems.
If Mitigated
With proper network segmentation and access controls, risk is limited to authorized users who could potentially decrypt data they shouldn't access.
🎯 Exploit Status
Exploitation requires ability to intercept encrypted traffic and cryptographic analysis capabilities.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.3.3 Fix Pack 10 and 7.4.3 Fix Pack 10
Vendor Advisory: https://www.ibm.com/support/pages/node/6488945
Restart Required: Yes
Instructions:
1. Download appropriate fix pack from IBM Fix Central. 2. Backup QRadar configuration. 3. Apply fix pack following IBM documentation. 4. Restart QRadar services.
🔧 Temporary Workarounds
Network Segmentation
allIsolate QRadar management interfaces to trusted networks only
Access Control
allRestrict administrative access to QRadar to only authorized personnel
🧯 If You Can't Patch
- Implement strict network segmentation to limit QRadar traffic to trusted networks only
- Monitor for unusual access patterns or cryptographic-related errors in QRadar logs
🔍 How to Verify
Check if Vulnerable:
Check QRadar version via Admin tab > System & License Management > Deployment StatusCheck Version:
ssh admin@qradar-host 'cat /opt/qradar/VERSION'Verify Fix Applied:
Verify version shows 7.3.3 Fix Pack 10 or 7.4.3 Fix Pack 10 after patching📡 Detection & Monitoring
Log Indicators:
- Unusual cryptographic errors
- Multiple failed decryption attempts
Network Indicators:
- Unusual traffic patterns to/from QRadar management interfaces
SIEM Query:
source="QRadar" AND (event_name="CRYPTO_ERROR" OR description="decryption")