CVE-2020-15316 Explained : Impact and Mitigation

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

Understanding CVE-2020-15316

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

What is CVE-2020-15316?

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

The Impact of CVE-2020-15316

The presence of a hardcoded ECDSA SSH key in the root account can lead to unauthorized access and potential security breaches in affected systems.

Technical Details of CVE-2020-15316

This section provides more technical insights into the CVE.

Vulnerability Description

The hardcoded ECDSA SSH key for the root account within the /opt/axess chroot directory tree in Zyxel CloudCNM SecuManager versions 3.1.0 and 3.1.1 poses a security risk.

Affected Systems and Versions

Zyxel CloudCNM SecuManager 3.1.0
Zyxel CloudCNM SecuManager 3.1.1

Exploitation Mechanism

Unauthorized users can exploit the hardcoded ECDSA SSH key to gain access to the root account, compromising system security.

Mitigation and Prevention

Protecting systems from CVE-2020-15316 is crucial to maintaining security.

Immediate Steps to Take

Disable SSH access to the affected Zyxel CloudCNM SecuManager versions 3.1.0 and 3.1.1.
Monitor for any unauthorized access attempts.

Long-Term Security Practices

Regularly update and patch the Zyxel CloudCNM SecuManager software.
Implement strong password policies and multi-factor authentication.

Patching and Updates

Apply patches provided by Zyxel to remove the hardcoded ECDSA SSH key vulnerability.