CVE-2021-20340 in Engineering
Summary
by MITRE • 03/05/2021
IBM Engineering products 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-Force ID: 194451.
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Analysis
by VulDB Data Team • 03/07/2021
IBM Engineering products contain a cross-site scripting vulnerability that enables malicious actors to inject arbitrary JavaScript code into the web user interface. This flaw exists within the web application's input validation mechanisms, allowing attackers to craft specially crafted payloads that bypass security controls designed to sanitize user inputs. The vulnerability specifically affects the web-based interfaces of IBM Engineering solutions, creating a persistent threat vector that can be exploited through various attack vectors including user profile fields, comment sections, or any input parameter that is subsequently rendered in the web UI without proper sanitization.
The technical implementation of this XSS vulnerability stems from inadequate output encoding and input validation processes within the web application framework. When user-provided data is directly incorporated into web page content without proper sanitization, it creates opportunities for attackers to inject malicious scripts that execute in the context of legitimate user sessions. The vulnerability operates at the application layer and leverages the trust relationship between the user's browser and the web application, making it particularly dangerous as it can manipulate the web interface to perform actions on behalf of authenticated users. This type of vulnerability maps directly to CWE-79 which defines cross-site scripting flaws where untrusted data is improperly incorporated into web pages without proper validation or encoding.
The operational impact of this vulnerability extends beyond simple script execution, as it can lead to complete session hijacking and credential theft within trusted user sessions. Attackers can exploit this weakness to steal session cookies, access sensitive data, modify user profiles, or perform unauthorized actions that appear to originate from legitimate users. The threat is particularly severe because IBM Engineering products are typically used in enterprise environments where users have elevated privileges and access to critical systems, making successful exploitation potentially devastating for organizational security. This vulnerability can be exploited through various methods including reflected XSS, stored XSS, or DOM-based XSS depending on how the application processes user inputs and renders content.
Organizations utilizing IBM Engineering products should implement immediate mitigations including comprehensive input validation, output encoding, and the implementation of Content Security Policy headers to restrict script execution. The recommended approach involves deploying web application firewalls to filter malicious payloads, implementing proper input sanitization routines, and ensuring all user-provided content is properly escaped before rendering in web interfaces. Security teams should also conduct thorough penetration testing to identify all potential entry points where user input is processed, and establish monitoring procedures to detect anomalous script injection attempts. The vulnerability aligns with ATT&CK technique T1059.007 which covers scripting through web shell execution, and organizations should consider implementing additional security controls such as browser security policies and regular security assessments to prevent exploitation. Regular patch management and security updates from IBM should be prioritized to address this vulnerability and prevent potential compromise of enterprise engineering systems.