CVE-2020-4427
📋 TL;DR
CVE-2020-4427 is an authentication bypass vulnerability in IBM Data Risk Manager when configured with SAML authentication. A remote attacker can send a specially crafted HTTP request to bypass security restrictions and gain full administrative access to the system. This affects IBM Data Risk Manager versions 2.0.1 through 2.0.6.
💻 Affected Systems
- IBM Data Risk Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full administrative compromise of the IBM Data Risk Manager system, allowing complete control over the security management platform, data exfiltration, and potential lateral movement to connected systems.
Likely Case
Unauthorized administrative access leading to data theft, configuration changes, and potential disruption of security monitoring capabilities.
If Mitigated
Limited impact if proper network segmentation, authentication controls, and monitoring are in place to detect and block exploitation attempts.
🎯 Exploit Status
Exploitation requires sending a specially crafted HTTP request to bypass SAML authentication. Public disclosure includes technical details that could facilitate exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.0.6.1 or later
Vendor Advisory: https://www.ibm.com/support/pages/node/6206875
Restart Required: Yes
Instructions:
1. Download the fix from IBM Fix Central. 2. Apply the patch to IBM Data Risk Manager. 3. Restart the application. 4. Verify the fix by checking the version number.
🔧 Temporary Workarounds
Disable SAML Authentication
allSwitch to alternative authentication methods until patching is complete.
Configure IBM Data Risk Manager to use non-SAML authentication methods
Network Access Controls
allRestrict access to IBM Data Risk Manager to trusted IP addresses only.
Configure firewall rules to limit access to specific source IPs
🧯 If You Can't Patch
- Implement strict network segmentation to isolate IBM Data Risk Manager from untrusted networks.
- Enable detailed logging and monitoring for authentication bypass attempts and unusual administrative activity.
🔍 How to Verify
Check if Vulnerable:
Check if IBM Data Risk Manager version is between 2.0.1 and 2.0.6 and configured with SAML authentication.Check Version:
Check the IBM Data Risk Manager administration interface or configuration files for version information.Verify Fix Applied:
Verify the version is 2.0.6.1 or later and test authentication functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual authentication bypass attempts in application logs
- Administrative actions from unexpected IP addresses or users
- Failed SAML authentication followed by successful access
Network Indicators:
- HTTP requests with crafted parameters targeting authentication endpoints
- Traffic patterns indicating authentication bypass attempts
SIEM Query:
Search for HTTP requests containing suspicious authentication bypass patterns to IBM Data Risk Manager endpoints.🔗 References
- https://exchange.xforce.ibmcloud.com/vulnerabilities/180532
- https://www.ibm.com/support/pages/node/6206875
- http://seclists.org/fulldisclosure/2024/Nov/0
- http://seclists.org/fulldisclosure/2024/Nov/1
- https://exchange.xforce.ibmcloud.com/vulnerabilities/180532
- https://www.ibm.com/support/pages/node/6206875
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-4427
