CVE-2018-20736 in API Manager
Summary
by MITRE
An issue was discovered in WSO2 API Manager 2.1.0 and 2.6.0. A DOM-based XSS exists in the store part of the product.
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Analysis
by VulDB Data Team • 08/03/2023
The vulnerability identified as CVE-2018-20736 represents a significant security flaw within the WSO2 API Manager platform, specifically affecting versions 2.1.0 and 2.6.0. This issue resides within the store component of the application, which serves as the user-facing interface for API consumption and management. The affected system operates as a comprehensive API management solution that facilitates the creation, deployment, and monitoring of APIs within enterprise environments. The store functionality allows developers and consumers to browse available APIs, subscribe to services, and manage their API access credentials. Given the critical nature of API management platforms in modern enterprise architectures, vulnerabilities within these components can have far-reaching consequences for organizations relying on WSO2's services for their digital infrastructure.
The technical flaw manifests as a DOM-based cross-site scripting vulnerability, which occurs when the application processes user input directly within the Document Object Model without proper sanitization or validation. This particular vulnerability stems from improper handling of user-supplied data within the JavaScript code that executes on the client-side of the store interface. When malicious input is processed through DOM manipulation functions, it can execute arbitrary JavaScript code within the context of the user's browser session. The vulnerability specifically affects how the application handles URL parameters or other client-side data that gets reflected into DOM elements without adequate security controls. This type of vulnerability is particularly dangerous because it can be exploited through social engineering techniques or by tricking users into visiting malicious links that contain crafted payloads designed to exploit this specific DOM manipulation flaw.
The operational impact of this vulnerability extends beyond simple data exposure, as it provides attackers with the capability to hijack user sessions, steal sensitive information, and potentially escalate privileges within the application context. An attacker could craft malicious URLs that, when visited by authenticated users, would execute malicious scripts capable of stealing session cookies, accessing user data, or performing unauthorized actions on behalf of the victim. The vulnerability affects the store component specifically, meaning that users who access the API store interface could be compromised, potentially leading to unauthorized API access, data exfiltration, or disruption of API management services. Organizations using WSO2 API Manager in production environments face significant risk if this vulnerability remains unpatched, as it could enable attackers to gain unauthorized access to sensitive API resources and user information within the platform.
Mitigation strategies for CVE-2018-20736 should prioritize immediate patching of affected WSO2 API Manager versions to the latest available releases that contain fixes for this DOM-based XSS vulnerability. Organizations should also implement comprehensive input validation and sanitization measures within their web applications to prevent similar issues from occurring in other components. The implementation of Content Security Policy headers can provide additional protection against XSS attacks by restricting the sources from which scripts can be loaded and executed. Security teams should conduct thorough penetration testing and code reviews focusing on DOM manipulation functions and client-side input handling to identify potential similar vulnerabilities. This vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and falls under ATT&CK technique T1059.007 for script-based execution. Organizations should also consider implementing web application firewalls and monitoring systems to detect and prevent exploitation attempts targeting this specific vulnerability class. Regular security assessments and vulnerability management processes should be enhanced to ensure timely identification and remediation of similar client-side security issues.