CVE-2017-16941 Explained : Impact and Mitigation
Learn about CVE-2017-16941, a vulnerability in October CMS allowing remote authenticated users to execute arbitrary PHP code. Find mitigation steps and prevention measures here.
October CMS through version 1.0.428 allows remote authenticated users to execute arbitrary PHP code by exploiting a vulnerability related to the use of .htaccess in themes.
Understanding CVE-2017-16941
This CVE highlights a security issue in October CMS that enables authenticated remote users to execute arbitrary PHP code through a specific manipulation of theme ZIP archives.
What is CVE-2017-16941?
The vulnerability in October CMS up to version 1.0.428 allows authenticated remote users to upload and import a modified theme ZIP archive containing additional files, leading to the execution of arbitrary PHP code.
The Impact of CVE-2017-16941
The exploitation of this vulnerability can result in unauthorized execution of PHP code by authenticated remote users, potentially compromising the security and integrity of the affected system.
Technical Details of CVE-2017-16941
This section provides detailed technical insights into the CVE-2017-16941 vulnerability.
Vulnerability Description
The issue arises from the lack of restrictions on using .htaccess in themes within October CMS, allowing attackers to upload malicious files and execute arbitrary PHP code.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: Up to version 1.0.428
Exploitation Mechanism
Attackers can exploit this vulnerability by acquiring a theme ZIP archive from /backend/cms/themes, modifying it to include a .php file and a .htaccess file, and then uploading and importing the altered archive.
Mitigation and Prevention
To address and prevent the exploitation of CVE-2017-16941, the following steps are recommended:
Immediate Steps to Take
- Update October CMS to a patched version that addresses the vulnerability.
- Implement strict access controls and permissions to limit theme management capabilities.
Long-Term Security Practices
- Regularly monitor and audit theme uploads and modifications within the CMS.
- Educate users on secure coding practices and the risks associated with uploading custom themes.
Patching and Updates
- Stay informed about security updates and patches released by October CMS.