CVE-2021-2141 in FLEXCUBE Direct Banking
Summary
by MITRE • 04/23/2021
Vulnerability in the Oracle FLEXCUBE Direct Banking product of Oracle Financial Services Applications (component: Pre Login). Supported versions that are affected are 12.0.2 and 12.0.3. Difficult to exploit vulnerability allows high privileged attacker with network access via Oracle Net to compromise Oracle FLEXCUBE Direct Banking. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle FLEXCUBE Direct Banking accessible data. CVSS 3.1 Base Score 2.0 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:N).
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Analysis
by VulDB Data Team • 04/25/2021
The vulnerability identified as CVE-2021-2141 resides within Oracle FLEXCUBE Direct Banking, a critical component of Oracle Financial Services Applications that serves as a core banking platform for financial institutions. This particular flaw exists in the Pre Login component of the system, which handles authentication processes before users gain access to banking services. The affected versions 12.0.2 and 12.0.3 represent widely deployed iterations of this financial services application that organizations rely upon for their digital banking operations. The vulnerability's classification as difficult to exploit indicates that while it requires specific conditions to be successfully leveraged, the potential impact on financial data integrity makes it a significant concern for financial institutions.
The technical nature of this vulnerability stems from insufficient access controls within the Pre Login functionality, allowing an attacker with high privileges and network access through Oracle Net protocols to compromise the system. The CVSS score of 2.0 reflects the integrity impact, indicating that successful exploitation could enable unauthorized modification of data within the banking system. The attack vector requires network access via Oracle Net, which represents a common communication protocol used in enterprise database environments. The high privilege requirement suggests that attackers would need elevated credentials or system-level access to attempt exploitation, though this does not eliminate the risk entirely. The human interaction requirement implies that additional steps may be necessary for the attack to succeed, potentially involving social engineering or user manipulation to complete the exploitation process.
The operational impact of this vulnerability extends beyond simple data integrity concerns, as it could enable unauthorized update, insert, or delete operations on sensitive financial data. In the context of financial services applications, such capabilities could lead to significant financial losses, regulatory violations, and reputational damage for affected institutions. The potential for data manipulation within a banking system represents a critical security risk that could compromise customer financial information, transaction records, and overall system reliability. Organizations utilizing Oracle FLEXCUBE Direct Banking must consider the implications of this vulnerability across their entire digital banking ecosystem, as compromised integrity could affect multiple downstream processes including account management, transaction processing, and audit trails.
Mitigation strategies for CVE-2021-2141 should prioritize immediate patch management and security configuration reviews. Organizations should implement network segmentation to limit Oracle Net access to authorized systems and personnel, while also strengthening authentication controls and monitoring for unusual access patterns. The vulnerability aligns with CWE-284 (Improper Access Control) and represents a specific implementation weakness in the authentication framework that could be addressed through proper privilege management and network access controls. Security teams should also consider implementing additional layers of monitoring and logging around authentication processes, as this vulnerability could potentially be used to escalate privileges or manipulate data within the banking system. The ATT&CK framework would classify this vulnerability under privilege escalation techniques, specifically targeting the authentication and credential access domains where attackers could leverage system weaknesses to gain unauthorized access to financial data. Organizations should conduct comprehensive risk assessments to identify all systems running affected versions and ensure proper patch deployment while maintaining continuous monitoring of their financial services infrastructure for potential exploitation attempts.