CVE-2018-11562 in MISP
Summary
by MITRE
An issue was discovered in MISP 2.4.91. A vulnerability in app/View/Elements/eventattribute.ctp allows reflected XSS if a user clicks on a malicious link for an event view and then clicks on the deleted attributes quick filter.
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Analysis
by VulDB Data Team • 03/17/2023
The vulnerability identified as CVE-2018-11562 affects MISP version 2.4.91 and represents a reflected cross-site scripting flaw that can be exploited through specific user interactions within the application's event viewing interface. This vulnerability exists within the app/View/Elements/eventattribute.ctp file, which is responsible for rendering event attributes in the user interface. The flaw occurs when a user navigates to an event view page and subsequently interacts with a maliciously crafted link that triggers the deleted attributes quick filter functionality. The reflected XSS vulnerability arises because the application fails to properly sanitize or encode user-supplied input before incorporating it into the dynamic web page content.
The technical execution of this vulnerability requires a specific attack scenario where an attacker crafts a malicious link designed to exploit the application's handling of deleted attributes filter parameters. When a victim clicks this crafted link while viewing an event, the malicious payload becomes reflected back to the user's browser through the event attribute display mechanism. This occurs because the eventattribute.ctp template does not adequately validate or escape input data that originates from the deleted attributes quick filter functionality, allowing attacker-controlled content to be executed in the context of the victim's browser session. The vulnerability specifically leverages the way the application processes and displays attribute data when users interact with the quick filter interface for deleted items.
The operational impact of this vulnerability is significant as it can enable attackers to execute arbitrary JavaScript code within the victim's browser session, potentially leading to session hijacking, credential theft, or redirection to malicious sites. An attacker could craft payloads that steal session cookies, inject malicious content into the MISP interface, or redirect users to phishing sites that appear legitimate within the trusted MISP environment. The vulnerability affects all users who view events and interact with the deleted attributes filter, making it particularly dangerous in collaborative security environments where multiple users access the same MISP instance. The reflected nature of the vulnerability means that the attack payload must be delivered through a link, making it susceptible to phishing campaigns and social engineering attacks.
Mitigation strategies for CVE-2018-11562 should focus on implementing proper input validation and output encoding mechanisms within the affected application components. The primary fix involves ensuring that all user-supplied input passed to the eventattribute.ctp template is properly sanitized and encoded before being rendered in the browser. This approach aligns with CWE-79 which categorizes cross-site scripting vulnerabilities and emphasizes the importance of input validation and output encoding. Organizations should also implement Content Security Policy headers to add an additional layer of protection against XSS attacks. The recommended solution includes updating to a patched version of MISP, as this vulnerability was addressed in subsequent releases, and applying proper parameter validation for quick filter operations. Security teams should also consider implementing web application firewalls to detect and block malicious requests targeting this specific vulnerability pattern, which falls under ATT&CK technique T1566 for phishing and T1203 for exploitation for client execution.
This vulnerability demonstrates the importance of proper input handling in web applications and highlights how seemingly innocuous filter functionality can become a vector for sophisticated attacks. The attack chain requires user interaction with malicious content, which underscores the need for user education and awareness programs alongside technical mitigations. The vulnerability's classification under CWE-79 reflects the fundamental security principle that all user-supplied data must be treated as potentially malicious and properly handled before being incorporated into dynamic content generation processes. Organizations using MISP or similar threat intelligence platforms should prioritize patch management and security monitoring to prevent exploitation of such vulnerabilities that can compromise the integrity of security operations and incident response activities.