CVE-2016-5920 in Financial Transaction Manager
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the Web UI in IBM Financial Transaction Manager (FTM) for ACH Services 3.0.0.x before fp0015 and 3.0.1.0 before iFix0002 allows remote authenticated users to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 05/20/2019
The vulnerability identified as CVE-2016-5920 represents a critical cross-site scripting flaw within the web user interface of IBM Financial Transaction Manager for ACH Services. This security weakness affects specific versions of the software including 3.0.0.x prior to fix pack 0015 and 3.0.1.0 prior to iFix0002, creating a significant attack surface for malicious actors seeking to exploit web application vulnerabilities. The flaw exists in the web interface component that processes user inputs and renders content, making it particularly dangerous in financial transaction environments where sensitive data is handled.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding mechanisms within the web UI framework. Attackers with authenticated access can leverage this weakness to inject malicious scripts or HTML code into the application's response handling process. The unspecified vectors suggest that multiple input points within the interface may be susceptible to this type of injection attack, potentially including form fields, URL parameters, or other user-controllable data inputs. This XSS vulnerability operates under CWE-79 which specifically addresses cross-site scripting flaws in web applications, where improper sanitization of user-supplied data allows execution of malicious code in the context of the victim's browser session.
The operational impact of this vulnerability extends beyond simple script injection, as it can enable attackers to perform session hijacking, steal sensitive financial information, manipulate transaction data, or redirect users to malicious sites. In the context of financial transaction management systems, this represents a severe risk to data integrity and confidentiality. The authenticated nature of the attack means that attackers must first establish valid credentials, but once achieved, they can exploit this vulnerability to gain deeper access to financial transaction processing capabilities. This weakness directly violates security principles outlined in the ATT&CK framework under the T1059.007 technique for command and scripting interpreter, where attackers can execute malicious code through web interfaces.
Organizations utilizing IBM Financial Transaction Manager for ACH Services should immediately implement the vendor-provided fix packs and iFixes to remediate this vulnerability. Additional mitigations include implementing robust input validation controls, deploying web application firewalls, and conducting regular security assessments of web interfaces. The vulnerability demonstrates the critical importance of maintaining current security patches in financial applications where the consequences of exploitation could include financial loss, regulatory compliance violations, and reputational damage. Security teams should also consider implementing content security policies and monitoring for suspicious script injection attempts in web application logs to detect potential exploitation attempts.