CVE-2017-15284 : Exploit Details and Defense Strategies

OctoberCMS 1.0.425 (Build 425) is vulnerable to Cross-Site Scripting, allowing a user with limited privileges to upload a malicious SVG file as their profile's Avatar, leading to JavaScript execution in the Admin account.

Understanding CVE-2017-15284

This CVE involves a Cross-Site Scripting vulnerability in OctoberCMS 1.0.425, enabling an attacker to execute malicious scripts in the context of the Admin account.

What is CVE-2017-15284?

Cross-Site Scripting (XSS) in OctoberCMS 1.0.425 allows an attacker to upload a harmful SVG file as an Avatar, leading to unauthorized JavaScript execution in the Admin's account.

The Impact of CVE-2017-15284

The vulnerability permits an attacker to compromise the Admin account by uploading a malicious SVG file, potentially causing significant security breaches.

Technical Details of CVE-2017-15284

This section delves into the technical aspects of the CVE.

Vulnerability Description

The XSS flaw in OctoberCMS 1.0.425 enables a user with limited privileges to upload a malicious SVG file as their profile's Avatar, triggering JavaScript execution in the Admin account.

Affected Systems and Versions

Affected Version: OctoberCMS 1.0.425 (Build 425)
Vendor: Not applicable

Exploitation Mechanism

The vulnerability arises when a user uploads a crafted SVG file as their Avatar, which, when opened by the Admin, executes JavaScript within the Admin account's context.

Mitigation and Prevention

Protect your systems from CVE-2017-15284 with these mitigation strategies.

Immediate Steps to Take

Disable SVG uploads in user profiles to prevent malicious file execution.
Educate users about the risks of uploading files with executable code.

Long-Term Security Practices

Regularly update OctoberCMS to the latest secure version.
Implement input validation to block potentially harmful file uploads.

Patching and Updates

Ensure timely installation of security patches and updates to address vulnerabilities like CVE-2017-15284.