CVE-2020-11705 : What You Need to Know

An issue was discovered in ProVide (formerly zFTPServer) through 13.1. /ajax/ImportCertificate allows an attacker to load an arbitrary certificate in .pfx format or overwrite arbitrary files via the fileName parameter.

Understanding CVE-2020-11705

This CVE identifies a vulnerability in ProVide that could be exploited by attackers to load malicious certificates or overwrite files.

What is CVE-2020-11705?

The vulnerability in ProVide (formerly zFTPServer) through version 13.1 allows attackers to manipulate the ImportCertificate function to load unauthorized certificates or overwrite files using a specific parameter.

The Impact of CVE-2020-11705

This vulnerability could lead to unauthorized access, data manipulation, or denial of service attacks on systems running the affected versions of ProVide.

Technical Details of CVE-2020-11705

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The issue lies in the /ajax/ImportCertificate function of ProVide, enabling attackers to upload arbitrary certificates in .pfx format or overwrite files by exploiting the fileName parameter.

Affected Systems and Versions

Product: ProVide (formerly zFTPServer)
Versions affected: Up to version 13.1

Exploitation Mechanism

Attackers can exploit the vulnerability by sending crafted requests to the /ajax/ImportCertificate endpoint with malicious .pfx certificates or file names to overwrite.

Mitigation and Prevention

Protecting systems from CVE-2020-11705 requires immediate actions and long-term security measures.

Immediate Steps to Take

Disable the /ajax/ImportCertificate function if not essential for operations.
Implement strict input validation to prevent malicious file uploads.
Monitor system logs for any suspicious activities related to certificate imports.

Long-Term Security Practices

Regularly update ProVide to the latest secure version.
Conduct security audits to identify and address potential vulnerabilities.
Train staff on secure coding practices and awareness of social engineering tactics.

Patching and Updates

Apply patches or updates provided by ProVide to fix the vulnerability.