CVE-2020-7571 in EcoStruxure Building Operation WebReports
Summary
by MITRE • 11/20/2020
A CWE-79 Multiple Improper Neutralization of Input During Web Page Generation (Cross-site Scripting Reflected) vulnerability exists in EcoStruxure Building Operation WebReports V1.9 - V3.1 that could cause a remote attacker to inject arbitrary web script or HTML due to incorrect sanitization of user supplied data and achieve a Cross-Site Scripting reflected attack against other WebReport users.
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Analysis
by VulDB Data Team • 12/09/2020
The vulnerability identified as CVE-2020-7571 represents a critical cross-site scripting flaw classified under CWE-79, specifically targeting the EcoStruxure Building Operation WebReports platform across versions 1.9 through 3.1. This vulnerability stems from inadequate input sanitization mechanisms that fail to properly neutralize user-supplied data before incorporating it into dynamically generated web pages. The flaw exists within the web application's handling of user input parameters that are subsequently reflected back to users in web responses without appropriate encoding or validation measures.
The technical implementation of this vulnerability allows remote attackers to inject malicious scripts through crafted input parameters that are processed by the web application. When the application fails to sanitize these inputs properly, any user-supplied data can be executed as client-side scripts within the context of other users' browsers. This reflected XSS attack occurs because the application directly incorporates user input into web page content without adequate protection mechanisms such as output encoding or content security policies. The vulnerability specifically affects the WebReports component of the EcoStruxure Building Operation suite, which is designed for building management and monitoring purposes.
The operational impact of this vulnerability extends beyond simple script injection, as it can enable attackers to compromise user sessions, steal sensitive information, manipulate web page content, or redirect users to malicious websites. Since the vulnerability affects multiple versions within the 1.9 to 3.1 range, it represents a significant risk to organizations utilizing these building management systems, particularly those with web-based interfaces that expose user data through the affected components. The reflected nature of the attack means that malicious payloads must be delivered via crafted URLs or input parameters that are immediately reflected back to the user's browser, making the exploitation relatively straightforward and potentially widespread.
Organizations should implement immediate mitigations including input validation and output encoding mechanisms to prevent user-supplied data from being executed as scripts. The implementation of proper content security policies and the use of secure coding practices that prevent direct insertion of user input into web page content are essential. Additionally, regular security updates and patches from the vendor should be applied promptly to address the root cause of the vulnerability. This vulnerability aligns with ATT&CK technique T1203, which focuses on exploiting vulnerabilities in web applications to achieve persistent access and execute malicious code within user contexts. The remediation strategy should include comprehensive security testing of web applications and regular vulnerability assessments to prevent similar issues from occurring in other components of the building management infrastructure.