CVE-2023-21932 Overview
CVE-2023-21932 is a vulnerability in the Oracle Hospitality OPERA 5 Property Services product of Oracle Hospitality Applications, specifically affecting the OXI (Opera Exchange Interface) component. This vulnerability allows a high-privileged attacker with network access via HTTP to compromise the Oracle Hospitality OPERA 5 Property Services system. The vulnerability has scope change implications, meaning successful exploitation can significantly impact additional products beyond the vulnerable component.
Critical Impact
Successful exploitation can result in unauthorized access to critical data or complete access to all Oracle Hospitality OPERA 5 Property Services accessible data, unauthorized update/insert/delete access to some accessible data, and partial denial of service conditions.
Affected Products
- Oracle Hospitality OPERA 5 Property Services version 5.6
- Oracle Hospitality Applications (OXI component)
- Systems with network-accessible OPERA 5 Property Services deployments
Discovery Timeline
- April 18, 2023 - CVE-2023-21932 published to NVD
- November 21, 2024 - Last updated in NVD database
Technical Details for CVE-2023-21932
Vulnerability Analysis
This vulnerability exists within the OXI (Opera Exchange Interface) component of Oracle Hospitality OPERA 5 Property Services. The OXI component is a critical integration interface used by hospitality organizations to exchange data between OPERA and external systems such as central reservation systems, revenue management systems, and other third-party applications.
The vulnerability requires high privileges and is classified as difficult to exploit, requiring specific conditions to be met for successful exploitation. However, the scope change characteristic indicates that successful attacks can cascade beyond the vulnerable component to affect additional products and systems within the hospitality infrastructure.
The primary impacts include complete confidentiality breach of accessible data, limited integrity compromise through unauthorized data modification capabilities, and partial availability impact through denial of service conditions.
Root Cause
While Oracle has not disclosed the specific technical root cause (classified as NVD-CWE-noinfo), the vulnerability resides in the OXI component's handling of network requests. The OXI interface manages data exchange operations and the flaw appears to involve improper access controls or validation mechanisms that can be bypassed by privileged attackers to gain unauthorized access to sensitive hospitality data.
Attack Vector
The attack vector is network-based, requiring HTTP access to the vulnerable Oracle Hospitality OPERA 5 Property Services instance. Exploitation requires:
- High Privileges: The attacker must possess elevated privileges within the OPERA 5 environment
- Network Access: Direct HTTP connectivity to the vulnerable OXI component
- Complex Conditions: The attack complexity is high, indicating that successful exploitation requires specific conditions beyond basic network access
The attack does not require user interaction, meaning once the attacker has the necessary privileges and network positioning, exploitation can proceed without victim involvement. Due to the scope change characteristic, compromise of OPERA 5 could potentially affect connected systems such as property management systems, central reservation systems, and payment processing integrations.
Detection Methods for CVE-2023-21932
Indicators of Compromise
- Unusual HTTP requests to the OXI component from unexpected sources or privileged accounts
- Anomalous data access patterns indicating bulk retrieval of guest information or financial records
- Unexpected modifications to reservation data, guest profiles, or property configuration
- Authentication events from privileged accounts at unusual times or from unusual locations
Detection Strategies
- Monitor HTTP traffic to OXI component endpoints for suspicious patterns or unauthorized access attempts
- Implement logging and alerting for privileged account activities within OPERA 5 Property Services
- Review audit logs for data access patterns that deviate from normal operational baselines
- Deploy network-based detection for anomalous communication patterns between OPERA 5 and connected systems
Monitoring Recommendations
- Enable comprehensive audit logging for all OXI component transactions and privileged operations
- Implement real-time alerting for scope-change scenarios where OPERA 5 attempts to access or modify connected systems
- Monitor for partial denial of service conditions that may indicate ongoing exploitation attempts
- Establish baseline network behavior for OPERA 5 deployments and alert on deviations
How to Mitigate CVE-2023-21932
Immediate Actions Required
- Apply the Oracle Critical Patch Update from April 2023 immediately to all affected OPERA 5 Property Services deployments
- Audit all privileged accounts with access to OPERA 5 and enforce principle of least privilege
- Implement network segmentation to restrict HTTP access to the OXI component to only authorized systems
- Review and validate all third-party integrations utilizing the OXI interface
Patch Information
Oracle addressed this vulnerability in the Oracle Critical Patch Update Advisory - April 2023. Organizations running Oracle Hospitality OPERA 5 Property Services version 5.6 should apply the security patch immediately. Contact Oracle Support for specific patch packages and deployment guidance for your OPERA 5 environment.
Workarounds
- Implement strict network access controls limiting HTTP connectivity to the OXI component
- Deploy web application firewall rules to filter suspicious requests targeting OPERA 5 interfaces
- Enforce multi-factor authentication for all privileged accounts with OPERA 5 access
- Consider temporarily disabling non-essential OXI integrations until patching is complete
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
