CVE-2021-29757
📋 TL;DR
CVE-2021-29757 is a cross-site request forgery (CSRF) vulnerability in IBM QRadar User Behavior Analytics 4.1.1 that allows attackers to trick authenticated users into performing unauthorized actions. This affects organizations using IBM QRadar UBA 4.1.1 where users access the web interface.
💻 Affected Systems
- IBM QRadar User Behavior Analytics
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could perform administrative actions, modify configurations, create/delete users, or exfiltrate sensitive data through forged requests executed by authenticated users.
Likely Case
Attackers could modify user permissions, alter detection rules, or perform limited administrative actions through social engineering attacks.
If Mitigated
With proper CSRF protections and user awareness, impact is limited to unsuccessful attack attempts.
🎯 Exploit Status
CSRF attacks typically require user interaction but are technically simple to implement once the vulnerable endpoint is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply fix from IBM Security Bulletin
Vendor Advisory: https://www.ibm.com/support/pages/node/6477204
Restart Required: Yes
Instructions:
1. Review IBM Security Bulletin. 2. Apply the fix provided by IBM. 3. Restart affected services. 4. Verify the fix is applied.
🔧 Temporary Workarounds
Implement CSRF Tokens
allAdd CSRF protection tokens to all state-changing requests
SameSite Cookie Attribute
allSet SameSite=Strict or Lax attributes on session cookies
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to detect and block CSRF patterns
- Educate users about phishing risks and implement strict access controls
🔍 How to Verify
Check if Vulnerable:
Check if running IBM QRadar UBA 4.1.1 and review web interface for CSRF protectionsCheck Version:
Check QRadar UBA version through administrative interface or configuration filesVerify Fix Applied:
Verify the fix is applied per IBM's instructions and test CSRF protections📡 Detection & Monitoring
Log Indicators:
- Unusual administrative actions from user accounts
- Multiple failed state-changing requests
Network Indicators:
- Requests lacking CSRF tokens
- Requests with unexpected referrer headers
SIEM Query:
Search for administrative actions without corresponding user-initiated events in QRadar logs