CVE-2020-15411 Explained : Impact and Mitigation

An issue was discovered in MISP 2.4.128. app/Controller/AttributesController.php has insufficient ACL checks in the attachment downloader.

Understanding CVE-2020-15411

This CVE entry describes a vulnerability found in MISP version 2.4.128 related to inadequate ACL checks in a specific controller file.

What is CVE-2020-15411?

The vulnerability in MISP 2.4.128 allows unauthorized access to the attachment downloader due to insufficient access control list (ACL) checks.

The Impact of CVE-2020-15411

The vulnerability could potentially lead to unauthorized users downloading attachments, compromising the confidentiality and integrity of the system.

Technical Details of CVE-2020-15411

This section provides more technical insights into the vulnerability.

Vulnerability Description

The issue lies in the app/Controller/AttributesController.php file of MISP 2.4.128, where ACL checks are not adequately enforced for the attachment downloader.

Affected Systems and Versions

Affected Systems: MISP version 2.4.128
Affected Versions: Not specified

Exploitation Mechanism

Unauthorized users can exploit this vulnerability by bypassing the insufficient ACL checks in the attachment downloader, gaining access to download attachments.

Mitigation and Prevention

To address and prevent the exploitation of CVE-2020-15411, follow these mitigation strategies:

Immediate Steps to Take

Update MISP to the latest version that includes a patch for this vulnerability.
Implement proper access control mechanisms to restrict unauthorized access to sensitive functionalities.

Long-Term Security Practices

Regularly review and enhance access control policies within the application.
Conduct security audits to identify and address potential vulnerabilities proactively.

Patching and Updates

Stay informed about security updates and patches released by MISP.
Apply patches promptly to ensure that known vulnerabilities are mitigated effectively.