CVE-2018-2747 in FLEXCUBE Universal Banking
Summary
by MITRE
Vulnerability in the Oracle Banking Corporate Lending component of Oracle Financial Services Applications (subcomponent: Core module). Supported versions that are affected are 12.3.0, 12.4.0, 12.5.0 and 14.0.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Banking Corporate Lending. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Banking Corporate Lending accessible data. CVSS 3.0 Base Score 6.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).
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Analysis
by VulDB Data Team • 02/28/2023
The vulnerability identified as CVE-2018-2747 resides within Oracle Banking Corporate Lending component of Oracle Financial Services Applications, specifically affecting the Core module across multiple supported versions including 12.3.0, 12.4.0, 12.5.0, and 14.0.0. This represents a significant security weakness that falls under CWE-284 Access Control Issues, where insufficient access controls permit unauthorized users to gain access to sensitive financial data. The vulnerability is classified as easily exploitable due to its low privilege requirements and the fact that attackers can leverage network-based HTTP connections to initiate attacks without requiring elevated credentials or complex exploitation techniques.
The technical flaw manifests as a weakness in the authorization mechanisms within the Core module of the banking lending system, allowing a low privileged attacker to bypass normal access controls through HTTP network connections. This vulnerability operates at the application layer and specifically targets the confidentiality aspects of the system as indicated by the CVSS 3.0 Base Score of 6.5 with a confidentiality impact rating of High. The attack vector requires only network access via HTTP, making it particularly dangerous as it can be exploited from remote locations without requiring physical access to the network infrastructure or specialized tools beyond basic web browsing capabilities.
The operational impact of successful exploitation of CVE-2018-2747 is severe and potentially catastrophic for financial institutions using affected Oracle Financial Services Applications. Attackers who successfully compromise the system can gain unauthorized access to critical financial data including customer loan information, credit assessments, and other sensitive banking records that form the core of corporate lending operations. The vulnerability's ability to provide complete access to all Oracle Banking Corporate Lending accessible data means that attackers could potentially manipulate loan records, access confidential customer information, or disrupt core banking operations. This represents a significant risk to data integrity and customer privacy, particularly in environments where financial institutions handle large volumes of sensitive personal and corporate financial information.
Organizations affected by this vulnerability should implement immediate mitigations including applying the relevant Oracle security patches and updates released to address the specific access control weakness in the Core module. Network segmentation and firewall rules should be enforced to restrict HTTP access to the affected applications, while implementing additional authentication controls and monitoring mechanisms to detect unauthorized access attempts. The vulnerability aligns with ATT&CK technique T1078 Valid Accounts, as exploitation requires only legitimate network access to perform unauthorized data access, and may also relate to T1566 Phishing as attackers could potentially use social engineering to gain initial access before leveraging this specific vulnerability. Organizations should also consider implementing comprehensive audit logging and access monitoring to detect potential exploitation attempts and maintain compliance with financial industry regulations such as SOX and PCI DSS requirements for protecting sensitive financial data.