CVE-2021-2200: Oracle Applications Framework Auth Bypass

CVE-2021-2200 Overview

CVE-2021-2200 is a critical vulnerability affecting the Oracle Applications Framework product of Oracle E-Business Suite, specifically within the Home page component. This easily exploitable flaw allows an unauthenticated attacker with network access via HTTP to compromise the Oracle Applications Framework. Successful exploitation can result in unauthorized creation, deletion, or modification of critical data, as well as unauthorized access to sensitive information stored within the Oracle Applications Framework.

Critical Impact

Unauthenticated attackers can remotely access and manipulate critical business data in Oracle E-Business Suite without any user interaction required.

Affected Products

• Oracle Applications Framework version 12.2.10
• Oracle E-Business Suite (Home page component)

Discovery Timeline

• April 22, 2021 - CVE-2021-2200 published to NVD
• November 21, 2024 - Last updated in NVD database

Technical Details for CVE-2021-2200

Vulnerability Analysis

This vulnerability resides in the Home page component of Oracle Applications Framework, a core element of the Oracle E-Business Suite. The flaw enables remote exploitation without authentication, making it particularly dangerous for internet-exposed Oracle E-Business Suite deployments. Attackers can leverage this vulnerability to gain unauthorized access to critical application data, potentially compromising the confidentiality and integrity of sensitive business information.

The vulnerability affects both confidentiality and integrity of the system, allowing attackers to not only read sensitive data but also create, modify, or delete critical information within the Oracle Applications Framework. Given that Oracle E-Business Suite often contains financial, HR, and supply chain data, the potential business impact of successful exploitation is severe.

Root Cause

The vulnerability stems from improper access controls in the Home page component of Oracle Applications Framework. The specific weakness classification is not detailed in the CVE database (NVD-CWE-noinfo), but the vulnerability characteristics indicate insufficient authentication or authorization checks that allow unauthenticated network access to protected functionality and data.

Attack Vector

The attack vector is network-based, requiring only HTTP access to the vulnerable Oracle Applications Framework instance. An attacker does not need any prior authentication, privileges, or user interaction to exploit this vulnerability. The attack complexity is low, meaning exploitation can be achieved reliably without special conditions.

Exploitation typically involves sending crafted HTTP requests to the Home page component endpoint. Since no authentication is required, attackers can directly target exposed Oracle E-Business Suite instances from the network. The vulnerability does not affect system availability but provides complete access to read, create, modify, and delete critical data.

Detection Methods for CVE-2021-2200

Indicators of Compromise

• Unusual HTTP requests targeting Oracle Applications Framework Home page endpoints from unauthorized sources
• Unexpected data modifications or access patterns in Oracle E-Business Suite audit logs
• Anomalous network traffic to Oracle E-Business Suite servers from external IP addresses
• Unauthorized data exports or bulk data access attempts in application logs

Detection Strategies

• Monitor Oracle E-Business Suite access logs for unauthenticated requests to Home page component endpoints
• Implement network intrusion detection rules to identify exploitation attempts against Oracle Applications Framework
• Review Oracle audit trails for unexpected data creation, modification, or deletion activities
• Deploy web application firewall (WAF) rules to detect and block suspicious HTTP requests to Oracle E-Business Suite

Monitoring Recommendations

• Enable comprehensive logging on Oracle E-Business Suite web tier and application tier
• Configure alerts for high-volume or unusual access patterns to the Home page component
• Implement network segmentation monitoring to detect unauthorized access attempts to Oracle database backend
• Regularly review access logs for signs of data exfiltration or unauthorized modifications

How to Mitigate CVE-2021-2200

Immediate Actions Required

• Apply the Oracle Critical Patch Update (CPU) for April 2021 immediately
• Restrict network access to Oracle E-Business Suite instances using firewalls and access control lists
• Implement web application firewall rules to filter malicious requests
• Review system audit logs for any signs of prior exploitation

Patch Information

Oracle has addressed this vulnerability in the April 2021 Critical Patch Update. Administrators should review the Oracle Security Alert April 2021 for detailed patching instructions and apply the relevant patches to Oracle Applications Framework version 12.2.10. The patch should be tested in a non-production environment before deployment to production systems.

Workarounds

• Implement strict network access controls to limit HTTP access to Oracle E-Business Suite from trusted networks only
• Deploy a web application firewall (WAF) in front of Oracle E-Business Suite to filter potentially malicious requests
• Enable additional Oracle E-Business Suite logging and monitoring to detect exploitation attempts
• Consider disabling or restricting access to the Home page component if not business-critical until patching is complete

# Example: Restrict network access to Oracle E-Business Suite
# Add firewall rules to limit access to trusted IP ranges only
iptables -A INPUT -p tcp --dport 80 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP