CVE-2019-4576
📋 TL;DR
CVE-2019-4576 is a critical authentication vulnerability in IBM QRadar Network Packet Capture where default configurations don't enforce strong passwords, making user accounts vulnerable to brute-force attacks. This affects all users of QRadar Network Packet Capture versions 7.3.0 through 7.3.3 Patch 1 and version 7.4.0 GA.
💻 Affected Systems
- IBM QRadar Network Packet Capture
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative access to QRadar Network Packet Capture, allowing them to intercept, modify, or delete network traffic data, potentially compromising entire network monitoring infrastructure.
Likely Case
Attackers compromise user accounts through brute-force attacks, gaining unauthorized access to sensitive network packet data and potentially pivoting to other systems.
If Mitigated
With strong password policies enforced, risk reduces to standard authentication attack vectors requiring sophisticated credential theft or social engineering.
🎯 Exploit Status
Exploitation requires authentication attempts but is trivial with password spraying or brute-force tools against weak passwords.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.3.3 Patch 2 and later, 7.4.0 Patch 1 and later
Vendor Advisory: https://www.ibm.com/support/pages/node/6221298
Restart Required: Yes
Instructions:
1. Apply IBM QRadar Network Packet Capture patch 7.3.3 Patch 2 or later for 7.3.x versions. 2. Apply patch 7.4.0 Patch 1 or later for 7.4.0 GA. 3. Restart affected services. 4. Verify password policies are now enforced.
🔧 Temporary Workarounds
Enforce Strong Password Policy
allManually configure and enforce strong password requirements including minimum length, complexity, and expiration.
Configure via QRadar Admin Console: Security > Password Policy
Implement Account Lockout
allConfigure account lockout after failed login attempts to prevent brute-force attacks.
Configure via QRadar Admin Console: Security > Account Lockout Policy
🧯 If You Can't Patch
- Immediately enforce strong password policies for all user accounts
- Implement network segmentation to restrict access to QRadar interfaces
- Enable multi-factor authentication if supported
- Monitor authentication logs for brute-force attempts
🔍 How to Verify
Check if Vulnerable:
Check QRadar version via Admin Console or command line. If version is 7.3.0-7.3.3 Patch 1 or 7.4.0 GA without patches, system is vulnerable.Check Version:
On QRadar appliance: /opt/qradar/bin/qradar_versionsVerify Fix Applied:
Verify patch installation via version check and test that password policies are enforced by attempting to set a weak password.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts from single source
- Successful logins after many failures
- Password policy violation events
Network Indicators:
- High volume of authentication requests to QRadar interfaces
- Traffic patterns consistent with brute-force tools
SIEM Query:
SELECT * FROM events WHERE devicetype='QRadar' AND (category='Authentication Failure' OR category='Authentication Success') GROUP BY sourceip HAVING COUNT(*) > 10