CVE-2020-13675 : What You Need to Know

Drupal's JSON:API and REST/File modules in Core versions 8.9.x, 9.1.x, and 9.2.x are affected by an access bypass vulnerability due to improper file validation.

Understanding CVE-2020-13675

This CVE involves a security issue in Drupal's Core versions that allows attackers to upload files bypassing validation processes.

What is CVE-2020-13675?

Drupal's JSON:API and REST/File modules permit file uploads via HTTP APIs, lacking proper file validation. This flaw enables attackers to bypass validation, potentially compromising the site.

The Impact of CVE-2020-13675

The vulnerability poses a risk of unauthorized file uploads, leading to potential security breaches and unauthorized access to sensitive data.

Technical Details of CVE-2020-13675

Drupal Core versions 8.9.x, 9.1.x, and 9.2.x are susceptible to this vulnerability.

Vulnerability Description

The issue arises from the modules' inability to execute comprehensive file validation, allowing malicious actors to upload files that evade the validation process.

Affected Systems and Versions

Drupal Core 8.9.x
Drupal Core 9.1.x
Drupal Core 9.2.x

Exploitation Mechanism

Attackers exploit the lack of proper file validation in Drupal's JSON:API and REST/File modules to upload files that bypass security measures.

Mitigation and Prevention

Taking immediate action and implementing long-term security practices are crucial to safeguard systems.

Immediate Steps to Take

Apply the security patch provided by Drupal for the affected Core versions.
Monitor file uploads and review access controls to prevent unauthorized uploads.

Long-Term Security Practices

Regularly update Drupal Core and modules to the latest versions.
Conduct security audits to identify and address vulnerabilities proactively.
Educate users on secure file upload practices to mitigate risks.
Implement file upload restrictions and validation checks to enhance security.
Utilize web application firewalls to monitor and filter incoming traffic.

Patching and Updates

Drupal has released security patches for Core versions 8.9.x, 9.1.x, and 9.2.x to address the access bypass vulnerability.