CVE-2020-4874
📋 TL;DR
IBM Cognos Controller versions 10.4.1, 10.4.2, and 11.0.0 use weak cryptographic algorithms that could allow attackers to decrypt sensitive information. This affects organizations using these specific versions of IBM's financial consolidation software for potentially exposing confidential financial data.
💻 Affected Systems
- IBM Cognos Controller
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers decrypt highly sensitive financial consolidation data, leading to exposure of confidential corporate financial information, regulatory violations, and competitive intelligence loss.
Likely Case
Attackers with access to encrypted data could decrypt sensitive financial information over time using cryptanalysis techniques against weak algorithms.
If Mitigated
With proper network segmentation and access controls, only authorized users can access encrypted data, limiting exposure even with weak cryptography.
🎯 Exploit Status
Exploitation requires access to encrypted data and cryptanalysis capabilities against weak algorithms.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply interim fix or upgrade to fixed versions per IBM advisory
Vendor Advisory: https://www.ibm.com/support/pages/node/7149876
Restart Required: Yes
Instructions:
1. Review IBM advisory 7149876
2. Apply recommended interim fix
3. Restart Cognos Controller services
4. Verify cryptographic algorithms have been strengthened
🔧 Temporary Workarounds
Restrict Data Access
allLimit access to encrypted Cognos Controller data to only authorized personnel
Network Segmentation
allIsolate Cognos Controller systems from untrusted networks
🧯 If You Can't Patch
- Implement strict access controls to limit who can access encrypted data
- Monitor for unusual access patterns to Cognos Controller systems
🔍 How to Verify
Check if Vulnerable:
Check IBM Cognos Controller version against affected versions: 10.4.1, 10.4.2, 11.0.0Check Version:
Check version in Cognos Controller administration console or installation directoryVerify Fix Applied:
Verify version is updated beyond affected versions and confirm with IBM support that cryptographic algorithms have been strengthened📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to encrypted data files
- Multiple failed decryption attempts
Network Indicators:
- Unusual data extraction patterns from Cognos Controller systems
SIEM Query:
source="cognos_controller" AND (event="data_access" OR event="decryption")