CVE-2021-20451
📋 TL;DR
This SQL injection vulnerability in IBM Cognos Controller allows remote attackers to execute arbitrary SQL commands against the back-end database. Attackers could potentially view, modify, add, or delete sensitive financial data. Organizations using IBM Cognos Controller versions 10.4.1, 10.4.2, or 11.0.0 are affected.
💻 Affected Systems
- IBM Cognos Controller
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the database including theft of sensitive financial data, unauthorized modifications to financial records, or complete database destruction.
Likely Case
Data exfiltration of sensitive financial information and potential unauthorized modifications to financial reporting data.
If Mitigated
Limited impact with proper input validation, parameterized queries, and database permissions in place.
🎯 Exploit Status
SQL injection vulnerabilities typically have low exploitation complexity, but specific exploit details are not publicly available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply interim fix or upgrade to fixed versions as specified in IBM advisory
Vendor Advisory: https://www.ibm.com/support/pages/node/7149876
Restart Required: Yes
Instructions:
1. Review IBM advisory at https://www.ibm.com/support/pages/node/7149876
2. Apply the recommended interim fix or upgrade to a fixed version
3. Restart IBM Cognos Controller services
4. Verify the fix is applied
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to IBM Cognos Controller to only trusted sources
Web Application Firewall
allDeploy WAF with SQL injection protection rules
🧯 If You Can't Patch
- Implement strict input validation and parameterized queries in custom code
- Apply principle of least privilege to database accounts used by Cognos Controller
🔍 How to Verify
Check if Vulnerable:
Check IBM Cognos Controller version against affected versions (10.4.1, 10.4.2, 11.0.0)Check Version:
Check version through IBM Cognos Controller administration interface or installation directoryVerify Fix Applied:
Verify version is updated beyond affected versions or interim fix is applied per IBM advisory📡 Detection & Monitoring
Log Indicators:
- Unusual SQL query patterns
- Multiple failed login attempts with SQL-like payloads
- Unexpected database errors
Network Indicators:
- Unusual database connection patterns from Cognos Controller
- SQL injection payloads in HTTP requests
SIEM Query:
source="cognos_controller" AND (payload="' OR " OR payload="UNION" OR payload="SELECT" OR payload="INSERT" OR payload="UPDATE" OR payload="DELETE")