CVE-2017-6928 : Security Advisory and Response
Learn about CVE-2017-6928, a security flaw in Drupal Core versions 7.x before 7.57 that allows unauthorized access to files in the private system. Find out the impact, affected systems, and mitigation steps.
In Drupal core versions 7.x prior to 7.57, a security flaw exists when the private file system is used. This vulnerability allows unauthorized access under specific circumstances. Learn more about the impact, technical details, and mitigation steps.
Understanding CVE-2017-6928
In Drupal core versions 7.x before 7.57, a vulnerability related to the private file system can lead to unauthorized access in certain scenarios.
What is CVE-2017-6928?
- In Drupal 7.x versions before 7.57, a flaw in the private file system's access verification process can result in unauthorized access to files.
- The vulnerability arises when conflicting permissions are granted and denied by different modules, leading to an access bypass.
- This issue primarily affects uncommon site configurations, reducing its widespread impact.
The Impact of CVE-2017-6928
- Unauthorized users may gain access to files they are not permitted to view or download.
- The vulnerability poses a risk to the confidentiality and integrity of sensitive information stored in the private file system.
Technical Details of CVE-2017-6928
In-depth technical information about the vulnerability and its implications.
Vulnerability Description
- Drupal core 7.x versions before 7.57 fail to properly verify user access to files in the private file system, allowing unauthorized access.
Affected Systems and Versions
- Product: Drupal Core
- Vendor: Drupal.org
- Affected Version: Drupal 7.x versions before 7.57
Exploitation Mechanism
- The vulnerability occurs when conflicting permissions are set by different modules, leading to an access bypass.
Mitigation and Prevention
Best practices to mitigate the vulnerability and prevent unauthorized access.
Immediate Steps to Take
- Update Drupal to version 7.57 or later to patch the security flaw.
- Review and adjust file permissions in the private file system to ensure proper access control.
Long-Term Security Practices
- Regularly monitor and audit file access permissions within Drupal to detect any unauthorized activities.
- Implement least privilege principles to restrict access to sensitive files based on user roles.
Patching and Updates
- Stay informed about security updates and patches released by Drupal.org to address vulnerabilities like CVE-2017-6928.