CVE-2020-15317 : Vulnerability Insights and Analysis

Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has a hardcoded RSA SSH key for the root account within the /opt/axess chroot directory tree.

Understanding CVE-2020-15317

This CVE identifies a vulnerability in Zyxel CloudCNM SecuManager versions 3.1.0 and 3.1.1 where a hardcoded RSA SSH key is present for the root account.

What is CVE-2020-15317?

The vulnerability in Zyxel CloudCNM SecuManager versions 3.1.0 and 3.1.1 allows unauthorized access to the root account due to the presence of a hardcoded RSA SSH key.

The Impact of CVE-2020-15317

The presence of the hardcoded RSA SSH key in the root account of Zyxel CloudCNM SecuManager versions 3.1.0 and 3.1.1 poses a significant security risk as it allows unauthorized individuals to gain access to the system.

Technical Details of CVE-2020-15317

Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 are affected by a hardcoded RSA SSH key vulnerability.

Vulnerability Description

Hardcoded RSA SSH key for the root account within the /opt/axess chroot directory tree.

Affected Systems and Versions

Zyxel CloudCNM SecuManager versions 3.1.0 and 3.1.1.

Exploitation Mechanism

Unauthorized individuals can exploit the hardcoded RSA SSH key to gain access to the root account.

Mitigation and Prevention

Immediate Steps to Take

Disable SSH access to the affected Zyxel CloudCNM SecuManager devices.
Monitor for any unauthorized access attempts. Long-Term Security Practices
Regularly update and patch the Zyxel CloudCNM SecuManager software.
Implement strong password policies and consider using certificate-based authentication.
Conduct security audits to identify and address any vulnerabilities.
Educate users on best practices for secure system access.
Consider implementing multi-factor authentication.
Stay informed about security advisories and updates from Zyxel.
Consider restricting network access to the affected devices.
Utilize network segmentation to isolate critical systems.
Regularly review and update access control lists.
Consider implementing intrusion detection and prevention systems.
Engage with cybersecurity professionals for security assessments and recommendations.

Patching and Updates

Apply patches and updates provided by Zyxel to address the hardcoded RSA SSH key vulnerability in Zyxel CloudCNM SecuManager versions 3.1.0 and 3.1.1.