CVE-2020-15328 : Security Advisory and Response

Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has weak /opt/axess/var/blobstorage/ permissions.

Understanding CVE-2020-15328

Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 vulnerability with weak permissions.

What is CVE-2020-15328?

This CVE identifies a security flaw in Zyxel CloudCNM SecuManager versions 3.1.0 and 3.1.1 due to inadequate permissions in the /opt/axess/var/blobstorage/ directory.

The Impact of CVE-2020-15328

The vulnerability could allow unauthorized users to access, modify, or delete critical files stored in the affected directory, potentially leading to unauthorized system access or data loss.

Technical Details of CVE-2020-15328

Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 weak permissions vulnerability.

Vulnerability Description

Weak permissions in /opt/axess/var/blobstorage/ directory

Affected Systems and Versions

Zyxel CloudCNM SecuManager 3.1.0
Zyxel CloudCNM SecuManager 3.1.1

Exploitation Mechanism

Unauthorized users can exploit the weak permissions to access, modify, or delete files in the directory.

Mitigation and Prevention

Steps to address and prevent CVE-2020-15328.

Immediate Steps to Take

Apply security patches provided by Zyxel promptly.
Restrict access to the vulnerable directory.
Monitor file activities in /opt/axess/var/blobstorage/ for suspicious behavior.

Long-Term Security Practices

Regularly update and patch software to prevent vulnerabilities.
Implement least privilege access controls to limit unauthorized access.

Patching and Updates

Stay informed about security updates from Zyxel and apply them as soon as they are available.