CVE-2018-3034 in FLEXCUBE Investor Servicing
Summary
by MITRE
Vulnerability in the Oracle FLEXCUBE Investor Servicing component of Oracle Financial Services Applications (subcomponent: Infrastructure). Supported versions that are affected are 12.0.4, 12.1.0, 12.3.0 and 12.4.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle FLEXCUBE Investor Servicing. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Oracle FLEXCUBE Investor Servicing, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle FLEXCUBE Investor Servicing accessible data as well as unauthorized read access to a subset of Oracle FLEXCUBE Investor Servicing 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:R/S:C/C:L/I:L/A:N).
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Analysis
by VulDB Data Team • 04/10/2023
The vulnerability identified as CVE-2018-3034 resides within Oracle FLEXCUBE Investor Servicing, a critical component of Oracle Financial Services Applications that manages investor servicing operations for financial institutions. This particular flaw exists within the Infrastructure subcomponent of the FLEXCUBE platform and affects specific versions including 12.0.4, 12.1.0, 12.3.0, and 12.4.0. The vulnerability represents a significant security weakness that could be exploited by adversaries with minimal privileges and network access through HTTP protocols, making it particularly dangerous in financial environments where sensitive investor data is processed and stored.
The technical nature of this vulnerability stems from insufficient access controls and authentication mechanisms within the FLEXCUBE Investor Servicing infrastructure. Attackers with low privileges and network connectivity can leverage this weakness to gain unauthorized access to critical financial data and operations. The vulnerability requires human interaction from users other than the attacker, suggesting that social engineering or targeted phishing attacks might be necessary to initially compromise systems, though the actual exploitation occurs through the web-based interface. This characteristic aligns with CWE-284 (Improper Access Control) and reflects the broader category of authentication bypass vulnerabilities that have been frequently targeted in financial services environments.
The operational impact of CVE-2018-3034 extends beyond the immediate FLEXCUBE platform, as successful exploitation can affect additional Oracle Financial Services products that may share underlying infrastructure or data repositories. This cascading effect demonstrates how vulnerabilities in core financial applications can create widespread security implications across entire financial institutions' technology ecosystems. The CVSS 3.0 score of 5.4 indicates a moderate severity level, but the potential for unauthorized update, insert, or delete operations combined with read access to sensitive data creates substantial risk for financial institutions. Attackers could manipulate investor records, modify transaction data, or extract confidential information that could be used for financial fraud or market manipulation.
Organizations affected by this vulnerability should implement immediate mitigations including network segmentation to restrict access to FLEXCUBE services, enforcing multi-factor authentication for all administrative access points, and implementing comprehensive monitoring of access patterns to detect anomalous behavior. The vulnerability's classification under CVSS vector AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N indicates that network-based attacks with low complexity and requiring only low privileges can be effective when user interaction is involved, making it essential for security teams to focus on both perimeter defenses and internal access controls. Security professionals should also consider implementing application-level firewalls and regular security assessments to identify and remediate similar access control weaknesses that may exist in other financial services applications, aligning with ATT&CK technique T1078 (Valid Accounts) and T1566 (Phishing) frameworks that commonly precede such exploitation attempts.