CVE-2016-5621 in FLEXCUBE Universal Banking
Summary
by MITRE
Unspecified vulnerability in the Oracle FLEXCUBE Universal Banking component in Oracle Financial Services Applications 11.3.0, 11.4.0, 12.0.1 and 12.0.3, 12.1.0, and 12.2.0 allows remote authenticated users to affect confidentiality via vectors related to INFRA, a different vulnerability than CVE-2016-5603.
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Analysis
by VulDB Data Team • 09/26/2022
The vulnerability identified as CVE-2016-5621 affects Oracle FLEXCUBE Universal Banking component within the Oracle Financial Services Applications suite, specifically impacting versions 11.3.0, 11.4.0, 12.0.1, 12.0.3, 12.1.0, and 12.2.0. This represents a significant security weakness in financial services software that serves as a cornerstone for banking operations worldwide. The vulnerability resides within the INFRA module of the FLEXCUBE system, which handles critical infrastructure functions that support core banking processes. The affected component operates as part of Oracle Financial Services Applications, a comprehensive suite designed to manage various banking operations including customer management, transaction processing, and financial reporting systems. Organizations utilizing these banking applications face potential exposure to unauthorized data access and information disclosure risks through this vulnerability.
The technical nature of CVE-2016-5621 manifests as a confidentiality impact vulnerability that can be exploited by remote authenticated users who have already gained access to the system through legitimate means. This classification places the vulnerability within the realm of privilege escalation and data exposure risks rather than initial access vectors. The vulnerability operates through unspecified vectors related to the INFRA component, which typically handles system infrastructure services, configuration management, and underlying operational functions that support the banking application's core functionality. While the exact technical mechanism remains unspecified, the nature of such vulnerabilities in financial applications often involves improper access controls, insecure data handling, or inadequate authentication checks within infrastructure modules that should remain protected from unauthorized access. The distinction from CVE-2016-5603 indicates this vulnerability targets different aspects of the system architecture, potentially affecting different data flows or operational components within the same application framework.
The operational impact of CVE-2016-5621 extends beyond simple data exposure to potentially compromise the integrity and confidentiality of sensitive banking information. Financial institutions relying on FLEXCUBE Universal Banking systems could face unauthorized access to customer data, transaction records, account information, and other proprietary banking data that should remain protected. The remote authenticated nature of the vulnerability means that attackers who have already established legitimate credentials within the system can leverage this weakness to access additional information beyond their normal operational scope. This could result in significant financial loss, regulatory compliance violations, reputational damage, and potential legal consequences for affected organizations. The vulnerability's impact is particularly concerning given that FLEXCUBE serves as a foundational component for banking operations, making any compromise of its infrastructure functions potentially catastrophic for business continuity and data protection.
Organizations should implement immediate mitigations including applying Oracle's security patches and updates released for this vulnerability, which would typically address the underlying infrastructure access control issues. System administrators should conduct thorough security assessments of their FLEXCUBE implementations to identify any potential unauthorized access patterns or anomalies that might indicate exploitation attempts. Network segmentation and monitoring controls should be enhanced to detect and prevent unauthorized access attempts to infrastructure components. The vulnerability aligns with CWE-284 (Improper Access Control) and potentially CWE-311 (Missing Encryption of Sensitive Data) categories, representing weaknesses in access control mechanisms that allow unauthorized information disclosure. From an ATT&CK framework perspective, this vulnerability could be categorized under T1078 (Valid Accounts) for initial access and T1005 (Data from Local System) or T1021.002 (SMB/Windows Admin Shares) for lateral movement and data extraction, depending on the specific exploitation methodology. Organizations should also review their access control policies and implement principle of least privilege configurations to minimize potential impact from such vulnerabilities in their financial services applications.