CVE-2021-3184 : Exploit Details and Defense Strategies

This article provides detailed information about CVE-2021-3184, a Cross-Site Scripting (XSS) vulnerability found in MISP 2.4.136. It discusses the impact, technical details, and mitigation strategies related to this CVE.

Understanding CVE-2021-3184

CVE-2021-3184 is a security vulnerability in MISP 2.4.136 that allows for XSS attacks through a crafted URL targeting the user homepage favourite button.

What is CVE-2021-3184?

CVE-2021-3184 is a Cross-Site Scripting (XSS) vulnerability present in MISP 2.4.136. It can be exploited via a specially crafted URL directed at the app/View/Elements/global_menu.ctp user homepage favourite button.

The Impact of CVE-2021-3184

This vulnerability could enable an attacker to execute malicious scripts in the context of a user's session, potentially leading to account takeover, unauthorized access to sensitive information, or other harmful actions.

Technical Details of CVE-2021-3184

CVE-2021-3184 allows an attacker to inject and execute arbitrary scripts in the user's browser, posing a significant risk to the confidentiality and integrity of user data.

Vulnerability Description

The vulnerability arises due to insufficient input validation in the handling of URLs, allowing malicious scripts to be executed within the application's context.

Affected Systems and Versions

MISP 2.4.136 is confirmed to be affected by this vulnerability, highlighting the importance of upgrading to a secure version or applying appropriate patches.

Exploitation Mechanism

Attackers can exploit this vulnerability by enticing users to click on a maliciously crafted URL, triggering the execution of unauthorized scripts within the user's session.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-3184, immediate actions should be taken to address the vulnerability and prevent potential exploitation.

Immediate Steps to Take

Users are advised to update MISP to a patched version that addresses the XSS vulnerability or apply security fixes provided by the vendor. Additionally, avoiding clicking on suspicious links can help prevent exploitation.

Long-Term Security Practices

Implementing secure coding practices, regularly updating software components, and conducting security assessments can enhance the overall resilience of the application against XSS attacks.

Patching and Updates

Regularly monitoring security advisories and promptly applying patches released by MISP can help safeguard the system against known vulnerabilities and maintain a secure environment.