CVE-2020-1623 : Security Advisory and Response

A local, authenticated user with shell can view sensitive configuration information via the ev.ops configuration file in Junos OS Evolved prior to 19.2R1.

Understanding CVE-2020-1623

This CVE involves a vulnerability in Junos OS Evolved that allows an authenticated local user to access sensitive configuration information.

What is CVE-2020-1623?

This CVE identifies a security flaw in Junos OS Evolved versions preceding 19.2R1, enabling a local user with shell access to view confidential system settings via the ev.ops file.

The Impact of CVE-2020-1623

The impact of this vulnerability is moderate, with a CVSS base score of 5.5, posing a high confidentiality risk as an attacker can access sensitive data.

Technical Details of CVE-2020-1623

This section covers the technical aspects of CVE-2020-1623.

Vulnerability Description

The vulnerability allows a local authenticated user to extract sensitive configuration details through the ev.ops configuration file.

Affected Systems and Versions

Product: Junos OS Evolved
Vendor: Juniper Networks
Affected Versions: All versions before 19.2R1

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Local
Privileges Required: Low
Confidentiality Impact: High
Integrity Impact: None
User Interaction: None

Mitigation and Prevention

Reducing the risk and addressing CVE-2020-1623 is essential for securing systems.

Immediate Steps to Take

Limit access to the Junos OS shell to trusted administrators needing access below the Junos CLI.

Long-Term Security Practices

Regularly review and restrict user permissions to mitigate the risk of unauthorized access.
Employ network segmentation to isolate critical systems from potential threats.

Patching and Updates

Update to the fixed versions to address the vulnerability:

19.2R1-EVO and later releases.