CVE-2018-2674 in FLEXCUBE Direct Banking
Summary
by MITRE
Vulnerability in the Oracle FLEXCUBE Direct Banking component of Oracle Financial Services Applications (subcomponent: Logoff). Supported versions that are affected are 12.0.2 and 12.0.3. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle FLEXCUBE Direct Banking. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Oracle FLEXCUBE Direct Banking, 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 Direct Banking accessible data as well as unauthorized read access to a subset of Oracle FLEXCUBE Direct Banking accessible data. CVSS 3.0 Base Score 6.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).
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Analysis
by VulDB Data Team • 01/30/2021
The vulnerability identified as CVE-2018-2674 resides within Oracle FLEXCUBE Direct Banking component, specifically within the Logoff subcomponent of Oracle Financial Services Applications. This security flaw affects versions 12.0.2 and 12.0.3, representing a significant risk to financial institutions utilizing this banking software suite. The vulnerability operates under the Common Weakness Enumeration framework as CWE-287, which encompasses improper authentication issues that can lead to unauthorized access to sensitive financial data. The flaw's classification as easily exploitable indicates that attackers can leverage this weakness with minimal technical sophistication, making it particularly dangerous in production environments where financial transactions occur regularly.
The technical implementation of this vulnerability stems from inadequate session management and authentication controls within the Logoff functionality. Attackers can exploit this weakness through unauthenticated HTTP network connections, eliminating the need for prior credentials or access privileges. The CVSS 3.0 scoring system assigns a base score of 6.1, reflecting the medium severity of the vulnerability with specific impacts to confidentiality and integrity. The attack vector AV:N indicates network-based exploitation, while AC:L demonstrates low attack complexity. The requirement for user interaction PR:N suggests that the vulnerability can be exploited without requiring additional authentication, though human interaction from an unauthorized party may be necessary for successful exploitation. The scope of impact S:C indicates that the vulnerability can affect additional products beyond the primary target, creating cascading security implications within the broader Oracle Financial Services ecosystem.
The operational impact of CVE-2018-2674 extends far beyond simple data access violations, potentially enabling attackers to perform unauthorized modifications to critical financial data. Successful exploitation allows for unauthorized update, insert, and delete operations against sensitive data within the Oracle FLEXCUBE Direct Banking environment, while also providing unauthorized read access to subsets of accessible financial information. This dual capability represents a severe threat to both data integrity and confidentiality, as attackers could manipulate transaction records, customer data, or financial balances while simultaneously accessing sensitive information. The vulnerability's potential to impact additional products aligns with the ATT&CK framework's concept of privilege escalation and lateral movement, where initial access can be leveraged to compromise other system components. Financial institutions using this software face substantial risk of data breaches, transaction manipulation, and potential regulatory violations that could result in significant financial and reputational damage.
Organizations should implement immediate mitigations including network segmentation to restrict access to the vulnerable Oracle FLEXCUBE Direct Banking components, deployment of web application firewalls to monitor and filter HTTP traffic, and implementation of robust session management controls. Regular security assessments and vulnerability scanning should be conducted to identify similar weaknesses within the broader Oracle Financial Services Applications suite. The vulnerability's classification as CWE-287 and its potential for exploitation under ATT&CK techniques emphasizes the need for comprehensive authentication controls, including multi-factor authentication mechanisms and proper session timeout configurations. Patch management procedures should be prioritized to ensure timely deployment of Oracle's security patches, while access controls should be reviewed to minimize the attack surface and prevent unauthorized access to critical financial data processing systems.