CVE-2019-6341 Explained : Impact and Mitigation

Drupal core - Moderately critical - Cross Site Scripting - SA-CORE-2019-004

Understanding CVE-2019-6341

This CVE involves a security issue in the File module/subsystem of Drupal versions prior to 7.65 for Drupal 7, prior to 8.6.13 for Drupal 8.6, and prior to 8.5.14 for Drupal 8.5, potentially leading to cross-site scripting (XSS) vulnerabilities.

What is CVE-2019-6341?

The File module/subsystem in Drupal versions prior to specific versions has a security flaw that can be exploited by malicious users to upload files, resulting in XSS vulnerabilities.

The Impact of CVE-2019-6341

This vulnerability can allow attackers to execute malicious scripts in the context of a user's browser, potentially leading to various attacks such as data theft, session hijacking, or defacement.

Technical Details of CVE-2019-6341

Vulnerability Description

Under certain circumstances, the File module/subsystem in affected Drupal versions allows malicious file uploads, enabling XSS attacks.

Affected Systems and Versions

Drupal 7 versions prior to 7.65
Drupal 8.6 versions prior to 8.6.13
Drupal 8.5 versions prior to 8.5.14

Exploitation Mechanism

Attackers can exploit this vulnerability by uploading a specially crafted file, triggering XSS vulnerabilities in the Drupal system.

Mitigation and Prevention

Immediate Steps to Take

Update Drupal to versions 7.65, 8.6.13, or 8.5.14 to mitigate the vulnerability.
Monitor file uploads and restrict file types to prevent malicious uploads.

Long-Term Security Practices

Regularly update Drupal and its modules to patch security vulnerabilities.
Implement file upload restrictions and security measures to prevent XSS attacks.

Patching and Updates

Apply the security updates provided by Drupal to address the vulnerability and enhance system security.