CVE-2020-4627
📋 TL;DR
CVE-2020-4627 is a CSV injection vulnerability in IBM Cloud Pak for Security 1.3.0.1 that allows remote attackers to execute arbitrary commands on affected systems. The vulnerability occurs due to improper validation of CSV file contents, enabling command injection attacks. Organizations running IBM Cloud Pak for Security 1.3.0.1 are affected.
💻 Affected Systems
- IBM Cloud Pak for Security
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote unauthenticated attacker gains full system control, executes arbitrary commands, and potentially compromises the entire Cloud Pak for Security deployment and connected systems.
Likely Case
Authenticated attacker with CSV upload privileges executes commands with the application's permissions, leading to data theft, lateral movement, or deployment disruption.
If Mitigated
With proper input validation and file upload restrictions, the attack surface is significantly reduced, though the underlying vulnerability remains.
🎯 Exploit Status
Exploitation requires CSV file upload capability. The vulnerability is in the CSV parsing logic, making exploitation straightforward once file upload is achieved.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.3.1.0 and later
Vendor Advisory: https://www.ibm.com/support/pages/node/6372538
Restart Required: Yes
Instructions:
1. Backup your current configuration. 2. Upgrade IBM Cloud Pak for Security to version 1.3.1.0 or later. 3. Follow IBM's upgrade documentation for Cloud Pak for Security. 4. Verify the upgrade completed successfully.
🔧 Temporary Workarounds
Restrict CSV file uploads
allTemporarily disable or restrict CSV file upload functionality until patching can be completed.
Implement input validation
allAdd server-side validation to sanitize CSV file contents before processing.
🧯 If You Can't Patch
- Implement strict file upload controls and validation for CSV files
- Isolate the Cloud Pak for Security deployment and restrict network access
🔍 How to Verify
Check if Vulnerable:
Check if running IBM Cloud Pak for Security version 1.3.0.1. Review application logs for CSV file processing errors or suspicious uploads.Check Version:
oc get pods -n cp4s | grep cp4s-operatorVerify Fix Applied:
Verify the system is running IBM Cloud Pak for Security version 1.3.1.0 or later. Test CSV file upload functionality with malicious content to ensure proper validation.📡 Detection & Monitoring
Log Indicators:
- CSV file upload attempts with unusual content
- Command execution patterns in application logs
- File processing errors related to CSV parsing
Network Indicators:
- Unusual outbound connections from Cloud Pak for Security components
- CSV file uploads to the application endpoint
SIEM Query:
source="cp4s-logs" AND (csv OR upload) AND (error OR suspicious)