CVE-2019-2549 in FLEXCUBE Direct Banking
Summary
by MITRE
Vulnerability in the Oracle FLEXCUBE Direct Banking component of Oracle Financial Services Applications (subcomponent: Logoff Page). The supported version that is affected is 12.0.2. 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 • 06/27/2023
The vulnerability identified as CVE-2019-2549 resides within Oracle FLEXCUBE Direct Banking component, specifically within the Logoff Page subcomponent of Oracle Financial Services Applications. This flaw affects version 12.0.2 and represents a significant security weakness that can be exploited by unauthenticated attackers who gain network access through HTTP protocols. The vulnerability's classification as easily exploitable indicates that attackers require minimal technical expertise to leverage this weakness, making it particularly dangerous in production environments where financial applications process sensitive customer data and transactional information.
The technical nature of this vulnerability stems from inadequate access controls within the logoff page functionality of the FLEXCUBE Direct Banking system. When users navigate away from the application or perform logoff operations, the system fails to properly validate authentication status or implement adequate session management controls. This weakness creates an opportunity for attackers to manipulate the application's behavior and potentially access restricted resources without proper authorization. The vulnerability's impact extends beyond the immediate application, as successful exploitation can affect additional Oracle Financial Services products that may share underlying infrastructure or data access mechanisms, creating cascading security implications across the financial services ecosystem.
From an operational perspective, this vulnerability presents a substantial risk to financial institutions utilizing Oracle FLEXCUBE Direct Banking solutions. The CVSS 3.0 base score of 6.1 reflects the moderate to high severity of the flaw, with confidentiality and integrity impacts rated as low but still significant. Attackers who successfully exploit this vulnerability can achieve unauthorized update, insert, or delete operations against sensitive data within the banking application, potentially compromising transaction integrity and customer information. Additionally, the vulnerability enables unauthorized read access to subsets of accessible data, which could expose sensitive financial information including account details, transaction histories, and customer personal data. The requirement for human interaction from a person other than the attacker indicates that social engineering or user manipulation may be necessary to complete the attack vector, though this does not diminish the overall risk level.
The security implications of CVE-2019-2549 align with CWE-284 (Improper Access Control) and can be mapped to ATT&CK techniques such as T1078 (Valid Accounts) and T1566 (Phishing) when considering potential exploitation methods. Organizations should implement immediate mitigations including applying Oracle's security patches, reviewing and strengthening session management controls, implementing additional access controls for logoff functionality, and conducting comprehensive security assessments of their FLEXCUBE implementations. Network segmentation and monitoring of HTTP traffic to banking applications should be enhanced to detect potential exploitation attempts. The vulnerability's classification as a cross-product impact issue underscores the importance of maintaining comprehensive security hygiene across all Oracle Financial Services applications and components within an organization's infrastructure.