CVE-2018-9109 : Exploit Details and Defense Strategies

A vulnerability related to directory traversal has been found in the elFinder version prior to 2.1.36 of Studio 42. This vulnerability allows a remote attacker to download and delete files accessible to the web server process.

Understanding CVE-2018-9109

This CVE involves a directory traversal vulnerability in elFinder.class.php, specifically in the zipdl() function.

What is CVE-2018-9109?

The vulnerability in elFinder version prior to 2.1.36 allows remote attackers to access and manipulate files on the web server.

The Impact of CVE-2018-9109

Exploiting this vulnerability could potentially enable a remote attacker to download files accessible to the web server process and delete files owned by the account running the web server process.

Technical Details of CVE-2018-9109

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability exists in the zipdl() function within the elFinder.class.php file, allowing unauthorized file access and deletion.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: Prior to 2.1.36 of Studio 42 elFinder

Exploitation Mechanism

The vulnerability can be exploited by a remote attacker to download files accessible to the web server process and delete files owned by the account running the web server process.

Mitigation and Prevention

Protecting systems from this vulnerability is crucial.

Immediate Steps to Take

Update elFinder to version 2.1.36 or later.
Implement access controls to restrict file access.

Long-Term Security Practices

Regularly monitor and audit file access and modifications.
Educate users on safe file handling practices.

Patching and Updates

Ensure timely installation of security patches and updates to prevent exploitation of known vulnerabilities.