CVE-2020-12471 Explained : Impact and Mitigation

MonoX through 5.1.40.5152 allows remote code execution via HTML5Upload.ashx or Pages/SocialNetworking/lng/en-US/PhotoGallery.aspx due to deserialization vulnerabilities.

Understanding CVE-2020-12471

What is CVE-2020-12471?

MonoX CMS version 5.1.40.5152 is vulnerable to remote code execution through specific endpoints, allowing attackers to exploit deserialization flaws.

The Impact of CVE-2020-12471

The vulnerability enables remote attackers to execute arbitrary code on the affected system, potentially leading to unauthorized access, data theft, and system compromise.

Technical Details of CVE-2020-12471

Vulnerability Description

The issue arises from deserialization vulnerabilities present in ModuleGallery.HTML5Upload, ModuleGallery.SilverLightUploadModule, HTML5Upload, and SilverLightUploadHandler within MonoX CMS.

Affected Systems and Versions

Product: MonoX CMS
Vendor: N/A
Versions: up to 5.1.40.5152

Exploitation Mechanism

Attackers can exploit the deserialization vulnerabilities by sending malicious payloads to the vulnerable endpoints, leading to remote code execution.

Mitigation and Prevention

Immediate Steps to Take

Disable or restrict access to the vulnerable endpoints (HTML5Upload.ashx and PhotoGallery.aspx).
Implement strict input validation and output encoding to prevent malicious input.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update MonoX CMS to the latest secure version.
Conduct security assessments and penetration testing to identify and address vulnerabilities.

Patching and Updates

Apply patches or security updates provided by MonoX CMS to fix the deserialization vulnerabilities and enhance system security.