IBM Data Risk Manager SAML Authentication Bypass and Remote Admin Access Vulnerability (CVE-2020-4427)
Executive & SecOps Summary
SECOPS ASSESSMENTIBM Data Risk Manager versions 2.0.1 through 2.0.6 configured with SAML authentication.
A remote attacker can bypass the authentication process and gain full administrative access to the system by sending a specially crafted HTTP request.
Apply the official security patches provided by IBM, or restrict access to SAML endpoints and review authentication configurations.
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
Apply the official security updates recommended by IBM. Verify your current version and plan the upgrade according to IBM Support Node 6206875.
# Check the current version of IBM Data Risk Manager
cat /opt/IBM/IDRM/version.txt
# Follow the official IBM upgrade procedure to apply the latest security patch.2. Temporary Workaround & Hardening Configuration
If patching cannot be applied immediately, temporarily disable SAML authentication or restrict access to the SAML endpoints using a reverse proxy or web application firewall (WAF).
# Restricting access to SAML endpoints via Nginx configuration
location /idrm/saml/ {
allow 10.0.0.0/8; # Restrict to internal management network
deny all;
}3. Log Audit & IoC Verification Commands
Audit the web server access logs for suspicious POST requests directed at SAML endpoints and verify administrative login events.
# Search for SAML-related POST requests in the access logs
grep -i 'saml' /var/log/nginx/access.log | grep 'POST'Block Exploits Instantly with Managed Virtual Patching Rules
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Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
This vulnerability (CVE-2020-4427) is an improper authentication bypass (CWE-287) in IBM Data Risk Manager (IDRM) when configured to use SAML for single sign-on (SSO). The root cause lies in the inadequate validation of SAML assertions, allowing the system to accept forged or improperly signed SAML responses from untrusted sources.
2. Exploitation Mechanics & Attack Scenario
An attacker exploits this vulnerability by targeting the SAML Assertion Consumer Service (ACS) endpoint of the IDRM application. By crafting a malicious SAML Response XML containing administrative identity claims (e.g., modifying the NameID to an admin user) and bypassing signature verification, the attacker sends a crafted HTTP POST request. The application processes this assertion as valid, granting the attacker a fully authenticated administrative session without requiring credentials.
3. Infrastructure & Business Impact
With a CVSS score of 9.8 (Critical) and its inclusion in the CISA KEV catalog, this vulnerability poses an immediate threat. Successful exploitation allows complete administrative takeover of the IBM Data Risk Manager platform, exposing sensitive enterprise data assets, risk profiles, and vulnerability data managed within the system.
Official Vendor Advisories & References
IBM Data Risk Manager 2.0.1, 2.0.2, 2.0.3, 2.0.4, 2.0.5, and 2.0.6 could allow a remote attacker to bypass security restrictions when configured with SAML authentication. By sending a specially crafted HTTP request, an attacker could exploit this vulnerability to bypass the authentication process and gain full administrative access to the system. IBM X-Force ID: 180532.
Frequently Asked SecOps Questions (CVE-2020-4427)
FAQQ1. How critical is CVE-2020-4427 and is it actively exploited in the wild?
CVE-2020-4427 is rated CVSS 9.8 (CRITICAL) with a 30-day EPSS exploitation probability of 70.0%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2020-4427?
Primary impacted vendors include ibm across data_risk_manager. Scope summary: IBM Data Risk Manager 2.0.1, 2.0.2, 2.0.3, 2.0.4, 2.0.5, and 2.0.6 (when SAML is enabled)
Q3. What temporary mitigations or workarounds exist for CVE-2020-4427 before patching?
[Mitigation] Apply the official security patches provided by IBM, or restrict access to SAML endpoints and review authentication configurations. Follow the CLI remediation commands and interactive SecOps checklist on this page to restrict exposure prior to your maintenance window.
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