CVE-2020-4530 in Business Automation Workflow
Summary
by MITRE
IBM Business Automation Workflow C.D.0 and IBM Business Process Manager 8.0, 8.5, and 8.6 are vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session. IBM X-ForceID: 182714.
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Analysis
by VulDB Data Team • 09/16/2020
IBM Business Automation Workflow C.D.0 and IBM Business Process Manager versions 8.0, 8.5, and 8.6 contain a cross-site scripting vulnerability that represents a critical security weakness in the web-based user interface components. This vulnerability falls under CWE-79 which specifically addresses cross-site scripting flaws, where the application fails to properly validate or sanitize user input before rendering it in web pages. The flaw exists in the web UI processing logic that does not adequately escape or filter malicious script content submitted by users, creating an environment where attackers can inject arbitrary JavaScript code that executes within the context of other users' sessions.
The operational impact of this vulnerability extends beyond simple script execution as it enables attackers to manipulate the intended functionality of the business process management system. When malicious JavaScript code is embedded through the vulnerable interface, it can intercept and capture sensitive information including user credentials, session tokens, and other authentication data that flows through the trusted session. This creates a significant risk for organizations relying on these platforms for business-critical processes, as the vulnerability can be exploited to gain unauthorized access to sensitive business data and operational controls.
The exploitation of this vulnerability aligns with ATT&CK technique T1059.007 for JavaScript execution and T1531 for credential access through session hijacking. Attackers can leverage this weakness by crafting malicious payloads that appear legitimate to the application's input validation systems, then deliver these payloads through web forms, URL parameters, or other user input mechanisms within the business process manager interface. The vulnerability particularly affects environments where multiple users interact with the same platform, as a single compromised session can potentially provide access to other users' data and privileges within the trusted network environment.
Organizations should implement immediate mitigations including input validation and output encoding controls that align with OWASP Top Ten recommendations for XSS prevention. The IBM recommended solution involves applying the relevant security patches and updates provided by IBM to address the specific vulnerability in the affected versions. Additionally, implementing Content Security Policy headers, input sanitization measures, and regular security assessments of web applications can help reduce the attack surface. Network segmentation and monitoring for suspicious JavaScript code execution patterns should also be considered as part of a comprehensive defense-in-depth strategy against this type of vulnerability.