CVE-2017-3495 in FLEXCUBE Direct Banking
Summary
by MITRE
Vulnerability in the Oracle FLEXCUBE Direct Banking component of Oracle Financial Services Applications (subcomponent: Pre-Login). 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 read access to a subset of Oracle FLEXCUBE Direct Banking accessible data. CVSS 3.0 Base Score 4.7 (Confidentiality impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N).
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Analysis
by VulDB Data Team • 12/19/2020
The vulnerability identified as CVE-2017-3495 affects the Oracle FLEXCUBE Direct Banking component within Oracle Financial Services Applications, specifically within the Pre-Login subcomponent. This vulnerability exists in versions 12.0.2 and 12.0.3 of the software, representing a significant security weakness that can be exploited by unauthenticated attackers. The vulnerability's classification as easily exploitable indicates that attackers require minimal technical expertise to leverage this flaw, making it particularly dangerous in production environments where such systems handle sensitive financial data. The attack vector operates through HTTP network access, meaning that any system with network connectivity to the vulnerable application could potentially be compromised, regardless of physical security measures in place.
The technical flaw resides in the Pre-Login functionality of the FLEXCUBE Direct Banking component, which fails to properly validate or authenticate user credentials before granting access to certain system resources. This weakness allows an attacker to bypass the standard authentication mechanisms and gain unauthorized access to specific data within the application. The vulnerability's CVSS 3.0 score of 4.7 reflects a moderate severity level with particular emphasis on confidentiality impacts, as the successful exploitation enables unauthorized read access to a subset of accessible data. The CVSS vector (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N) indicates that the attack requires no prior privileges, low complexity, and network access, while requiring human interaction from users other than the attacker, suggesting that social engineering or user manipulation may be involved in successful exploitation.
The operational impact of this vulnerability extends beyond the immediate FLEXCUBE Direct Banking component, as attacks may significantly affect additional products within the Oracle Financial Services Applications suite. This cascading effect demonstrates the interconnected nature of enterprise financial systems where a vulnerability in one component can potentially compromise related applications and services. The unauthorized read access capability allows attackers to extract sensitive financial information, customer data, transaction records, and other confidential business information that could be used for fraudulent activities, identity theft, or competitive intelligence gathering. Organizations using these vulnerable versions face substantial risk of data breaches and regulatory compliance violations, particularly in industries subject to strict financial data protection requirements such as banking, insurance, and securities.
Mitigation strategies for CVE-2017-3495 should include immediate implementation of the official Oracle patches and updates released to address this vulnerability, as recommended in the Oracle Critical Patch Update advisories. Network segmentation and firewall rules should be implemented to restrict access to the vulnerable application, particularly limiting HTTP access to trusted networks and IP addresses. Organizations should also implement enhanced monitoring and logging of authentication attempts and unusual access patterns to detect potential exploitation attempts. The vulnerability aligns with CWE-287 (Improper Authentication) and can be mapped to ATT&CK technique T1078 (Valid Accounts) and T1046 (Network Service Scanning), as attackers may leverage this vulnerability to establish persistent access or conduct reconnaissance activities. Regular security assessments and vulnerability scanning should be conducted to identify similar weaknesses in other components of the Oracle Financial Services Applications ecosystem, ensuring comprehensive protection against related threats.