Drupal 7 Elfinder Remote Code Execution Scanner

Drupal 7 is widely used for websites and content management systems, requiring regular maintenance and updating. Typically, developers, website managers, and IT professionals use Drupal 7 to build and manage websites. Elfinder is a popular open-source file manager that can be integrated with Drupal, particularly for managing files and directories efficiently. However, improper configurations or outdated versions can expose the system to vulnerabilities. Understanding and managing such vulnerabilities is crucial for maintaining a secure web environment. This scanner is essential for identifying potential weaknesses associated with the integration of Elfinder with Drupal 7.

The Remote Code Execution (RCE) vulnerability occurs when an attacker is able to execute arbitrary code on a server remotely, taking advantage of insufficient validation during file uploads, especially with PHP files. This is critical because it can allow attackers to compromise the entire website or application by executing malicious scripts. In contexts like Drupal 7 with Elfinder, this vulnerability emerges when the Elfinder library allows unrestricted file uploads. Attackers target the connector.php file to exploit this vulnerability for unauthorized access and control. Protecting against RCE is vital to ensure system integrity and data protection.

Technical details of this vulnerability include the possibility of unrestricted file uploads through the connector.php endpoint of the Elfinder library when used with Drupal 7. This library, if improperly configured, fails to restrict PHP file uploads or adequately sanitize inputs. The scanner performs checks to identify sites potentially vulnerable by requesting the connector.php file and analyzing its response. Specifically, the template looks for indicators such as JSON content and specific status codes to confirm the presence of a vulnerable endpoint.

Exploiting this vulnerability could allow attackers to execute arbitrary commands on the server, resulting in unauthorized data access, modification, or deletion. Furthermore, this could lead to a full compromise of the website, leaking sensitive information or using the site as a platform to attack other entities. Long-term damage includes damage to reputation, user trust, and potential legal consequences for the affected organization. Addressing this issue promptly is crucial to prevent widespread system compromises.

REFERENCES

• https://github.com/Kro0oz/drupal-7-elfinder