CVE-2023-48659

Comprehensive Technical Analysis of CVE-2023-48659

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2023-48659 CVSS Score: 9.8

The vulnerability in question is a parameter parsing issue in the app/Controller/AppController.php file of MISP (Malware Information Sharing Platform) versions prior to 2.4.176. The high CVSS score of 9.8 indicates a critical severity, suggesting that exploitation could lead to significant impacts such as unauthorized access, data breaches, or system compromise.

2. Potential Attack Vectors and Exploitation Methods

The vulnerability is related to reflected cross-site scripting (XSS) in the "galaxies" feature of MISP. An attacker could exploit this by crafting a malicious URL that, when visited by a user, executes arbitrary JavaScript code in the context of the user's session. This could lead to:

• Session Hijacking: Stealing session cookies to impersonate the user.
• Data Theft: Exfiltrating sensitive information from the user's browser.
• Malware Distribution: Redirecting users to malicious sites or downloading malware.

3. Affected Systems and Software Versions

Affected Software: MISP versions prior to 2.4.176.

Organizations using MISP for threat intelligence sharing and collaboration are at risk if they have not updated to version 2.4.176 or later. This includes any deployment where the "galaxies" feature is accessible to users.

4. Recommended Mitigation Strategies

1. Immediate Patching: Upgrade to MISP version 2.4.176 or later, which includes the fix for this vulnerability.
2. Input Validation: Ensure that all user inputs are properly sanitized and validated to prevent XSS attacks.
3. Content Security Policy (CSP): Implement a strong CSP to mitigate the impact of XSS vulnerabilities.
4. User Education: Train users to recognize and avoid clicking on suspicious links.
5. Regular Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues.

5. Impact on Cybersecurity Landscape

The discovery and exploitation of this vulnerability underscore the importance of robust input validation and secure coding practices. Given the critical role of MISP in threat intelligence sharing, the potential impact of this vulnerability extends beyond individual organizations to the broader cybersecurity community. Successful exploitation could compromise the integrity of shared threat intelligence data, leading to misinformation and reduced effectiveness in collaborative defense efforts.

6. Technical Details for Security Professionals

Vulnerability Details:

• Component: app/Controller/AppController.php
• Issue: Improper parameter parsing leading to reflected XSS.
• Affected Feature: "Galaxies" in MISP.

Exploitation Steps:

1. An attacker crafts a malicious URL containing a script payload.
2. The attacker distributes this URL to potential victims.
3. When a victim clicks the URL, the script is executed in the context of the victim's session.

Patch Information:

• Commit: 37ecf81b84a01baa4d4b1fade4de94a9018c32ed
• Release Notes: MISP v2.4.176

Additional References:

• Zigrin Advisory

Conclusion:

CVE-2023-48659 represents a critical vulnerability in MISP that requires immediate attention. Organizations using MISP should prioritize updating to the latest version and implementing additional security measures to mitigate the risk of XSS attacks. The broader cybersecurity community should take this as a reminder of the importance of secure coding practices and regular security audits.