CVE-2016-0268 in Financial Transaction Manager
Summary
by MITRE
XML external entity (XXE) vulnerability in IBM Financial Transaction Manager (FTM) for ACH Services for Multi-Platform 2.1.1.2 and 3.0.0.x before fp0013, Financial Transaction Manager (FTM) for Check Services for Multi-Platform 2.1.1.2 and 3.0.0.x before fp0013, and Financial Transaction Manager (FTM) for Corporate Payment Services (CPS) for Multi-Platform 2.1.1.2 and 3.0.0.x before fp0013 allows remote authenticated users to obtain sensitive information via crafted XML data. IBM X-Force ID: 110915.
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Analysis
by VulDB Data Team • 01/11/2020
The CVE-2016-0268 vulnerability represents a critical XML external entity (XXE) flaw discovered in IBM Financial Transaction Manager (FTM) across multiple service modules including ACH Services, Check Services, and Corporate Payment Services for Multi-Platform versions. This vulnerability resides within the XML processing mechanisms of these financial transaction systems, specifically affecting versions 2.1.1.2 and 3.0.0.x prior to patch level fp0013. The XXE vulnerability stems from the application's improper handling of external entity references within XML documents, creating a pathway for malicious actors to exploit the system's XML parser. The flaw is particularly concerning within financial transaction environments where sensitive data processing occurs, as it enables attackers to manipulate the XML parsing behavior and potentially access confidential information through crafted XML payloads.
The technical implementation of this vulnerability allows remote authenticated users to leverage the XML parser's capabilities to reference external entities that can be configured to access local files, network resources, or even internal system information. When the vulnerable FTM applications process XML data containing malicious external entity declarations, the parser resolves these references and potentially exposes internal system resources or sensitive data stored on the server. This vulnerability aligns with CWE-611, which specifically addresses improper restriction of XML external entity reference, and represents a classic example of how XML parsers can be manipulated to perform unauthorized data access operations. The attack vector requires authentication to the system, meaning that an attacker must first establish valid credentials before exploiting this vulnerability, but once exploited, the impact can be substantial.
The operational impact of CVE-2016-0268 within financial transaction environments is severe and multifaceted, potentially exposing sensitive financial data, customer information, and system configuration details. Financial institutions utilizing these FTM modules face significant risks including data breaches, regulatory compliance violations, and potential financial losses due to unauthorized access to transaction records and sensitive information. The vulnerability can be exploited to access system files, internal network resources, and potentially facilitate further attacks within the network infrastructure. According to ATT&CK framework, this vulnerability maps to T1071.004 for Application Layer Protocol: XML, and T1566 for Credential Access through the requirement of authenticated access. Organizations may experience service disruption, data exfiltration, and compromised system integrity when this vulnerability is successfully exploited, particularly in environments where transaction processing and sensitive data handling are paramount.
Organizations should implement immediate mitigation strategies including applying the vendor-provided patches and updates for FTM versions affected by this vulnerability, specifically targeting the fp0013 patch level for all affected modules. System administrators should also consider disabling external entity resolution in XML parsers, implementing strict XML validation controls, and monitoring for suspicious XML processing activities. Network segmentation and access control measures should be reinforced to limit the potential impact of successful exploitation attempts. Security teams should conduct thorough vulnerability assessments to identify all instances of affected FTM installations and ensure that proper input validation mechanisms are in place to prevent unauthorized XML entity resolution. The vulnerability serves as a reminder of the critical importance of secure XML processing in financial systems and the necessity of regular security updates and vulnerability management programs to protect against such persistent threats.