CVE-2018-2630 in FLEXCUBE Universal Banking
Summary
by MITRE
Vulnerability in the Oracle FLEXCUBE Universal Banking component of Oracle Financial Services Applications (subcomponent: Security Management System). Supported versions that are affected are 11.5.0, 11.6.0 and 11.7.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle FLEXCUBE Universal Banking. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle FLEXCUBE Universal Banking accessible data as well as unauthorized read access to a subset of Oracle FLEXCUBE Universal Banking accessible data. CVSS 3.0 Base Score 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N).
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Analysis
by VulDB Data Team • 01/30/2021
The vulnerability identified as CVE-2018-2630 resides within Oracle FLEXCUBE Universal Banking's Security Management System component, representing a critical weakness in the financial services applications suite that affects versions 11.5.0, 11.6.0, and 11.7.0. This security flaw operates at the intersection of application-level and network-based attacks, where an attacker with minimal privileges can leverage HTTP network access to compromise the system. The vulnerability's classification as easily exploitable indicates that the attack vector requires no specialized access or complex conditions, making it particularly dangerous for financial institutions that rely on this banking platform for core operations.
The technical nature of this vulnerability stems from insufficient authorization controls within the Security Management System, allowing attackers to perform unauthorized data manipulation operations through HTTP requests. The flaw enables low-privileged users to execute unauthorized update, insert, or delete operations on specific data sets within the Oracle FLEXCUBE Universal Banking environment, while simultaneously providing unauthorized read access to a subset of accessible data. This dual impact on both confidentiality and integrity aligns with CWE-284 (Improper Access Control) and represents a classic privilege escalation vulnerability that can be exploited through network-based attacks. The CVSS 3.0 score of 5.4 reflects the moderate severity of the impact, with the vector indicating network accessibility, low attack complexity, and the requirement for low privileges to exploit the vulnerability.
The operational implications of CVE-2018-2630 extend beyond simple data compromise, as it creates potential for significant financial and reputational damage to organizations using Oracle FLEXCUBE Universal Banking. Attackers could manipulate transaction records, alter customer data, or access sensitive financial information, potentially leading to fraud, regulatory violations, and loss of customer trust. The vulnerability's impact on the security management system specifically targets the core authentication and authorization mechanisms that protect financial data, making it particularly dangerous for banking institutions that depend on proper access controls to maintain data integrity and confidentiality. Organizations may face regulatory scrutiny and compliance violations under frameworks such as PCI DSS and SOX if this vulnerability is exploited successfully.
Mitigation strategies for CVE-2018-2630 should include immediate implementation of Oracle's security patches and updates, along with network-level controls such as firewalls and access control lists to restrict HTTP access to the affected system. Organizations should conduct thorough vulnerability assessments to identify all instances of the affected versions and implement network segmentation to limit exposure. The security management system should be reviewed for proper access controls and authorization mechanisms, with additional logging and monitoring implemented to detect unauthorized access attempts. According to ATT&CK framework, this vulnerability maps to T1078 (Valid Accounts) and T1566 (Phishing) as attackers may exploit legitimate credentials to access the system, while T1005 (Data from Local System) and T1021 (Remote Services) represent potential attack paths through network access. Regular security assessments and penetration testing should be conducted to ensure that access controls remain effective against evolving threats.