CVE-2017-3189 : Exploit Details and Defense Strategies

The dotCMS administration panel, specifically version 3.7.1 and earlier, has a vulnerability in its "Push Publishing" feature in the Enterprise Pro edition that allows for arbitrary file upload.

Understanding CVE-2017-3189

This CVE relates to a security vulnerability in the dotCMS administration panel.

What is CVE-2017-3189?

The vulnerability in the dotCMS administration panel version 3.7.1 and earlier allows for arbitrary file upload through the "Push Publishing" feature, potentially leading to remote command execution.

The Impact of CVE-2017-3189

The vulnerability enables unauthenticated attackers to perform actions in the dotCMS administrator panel with the same permissions as a victim user or execute system commands with the application's user permissions.

Technical Details of CVE-2017-3189

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability arises from the lack of file type validation when decompressing tar.gz archives uploaded to the Push Publishing feature.

Affected Systems and Versions

Product: Administration Panel
Vendor: docCMS
Versions Affected: <= 3.7.1

Exploitation Mechanism

The vulnerability, when combined with CVE-2017-3188 (path traversal vulnerability), can result in remote command execution using the dotCMS application user's permissions.

Mitigation and Prevention

Protecting systems from CVE-2017-3189 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update dotCMS to a patched version that addresses the vulnerability.
Implement strict file upload validation mechanisms.

Long-Term Security Practices

Regularly monitor and audit file uploads and system commands.
Conduct security training to raise awareness of potential vulnerabilities.

Patching and Updates

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