CVE-2023-47150
📋 TL;DR
IBM Common Cryptographic Architecture (CCA) versions 7.0.0 through 7.5.36 contain a vulnerability in AES operation handling that could allow a remote user to cause a denial of service. The vulnerability stems from incorrect data processing during certain AES cryptographic operations. Systems using affected CCA versions for cryptographic services are at risk.
💻 Affected Systems
- IBM Common Cryptographic Architecture (CCA)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption of cryptographic operations, potentially affecting all applications relying on CCA for encryption/decryption services.
Likely Case
Service degradation or temporary unavailability of cryptographic functions when maliciously triggered AES operations are processed.
If Mitigated
Minimal impact with proper network segmentation and access controls limiting exposure to trusted sources only.
🎯 Exploit Status
Remote exploitation requires sending specially crafted data to trigger the vulnerable AES operations.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.5.37 and later
Vendor Advisory: https://www.ibm.com/support/pages/node/7145168
Restart Required: Yes
Instructions:
1. Download IBM CCA version 7.5.37 or later from IBM Fix Central. 2. Stop all applications using CCA. 3. Apply the update following IBM installation procedures. 4. Restart CCA services and dependent applications.
🔧 Temporary Workarounds
Network Access Restriction
allLimit network access to CCA services to only trusted sources using firewall rules.
Application Layer Filtering
allImplement input validation in applications using CCA to filter potentially malicious AES operation requests.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate CCA services from untrusted networks.
- Monitor CCA service logs for unusual AES operation patterns and implement rate limiting.
🔍 How to Verify
Check if Vulnerable:
Check CCA version using 'pkcsconf -v' or equivalent command. Versions 7.0.0 through 7.5.36 are vulnerable.Check Version:
pkcsconf -vVerify Fix Applied:
Verify CCA version is 7.5.37 or later using 'pkcsconf -v' command.📡 Detection & Monitoring
Log Indicators:
- Unusual AES operation failures
- Increased error rates in cryptographic operations
- Service restart events in CCA logs
Network Indicators:
- Unusual traffic patterns to CCA service ports
- Repeated connection attempts with cryptographic payloads
SIEM Query:
source="cca_logs" AND (error OR failure) AND (AES OR cryptographic)