CVE-2020-1624 : Exploit Details and Defense Strategies

A local, authenticated user with shell can obtain hashed values of login passwords and shared secrets through raw objmon configuration files in Junos OS Evolved prior to 19.1R1.

Understanding CVE-2020-1624

This CVE involves a vulnerability in Junos OS Evolved that could lead to the exposure of sensitive information.

What is CVE-2020-1624?

It allows a local, authenticated user with shell access to retrieve hashed values of passwords and shared secrets from raw objmon config files in Junos OS Evolved prior to version 19.1R1.

The Impact of CVE-2020-1624

Confidentiality impact is high due to the exposure of sensitive information.
Exploitation does not require user interaction and can be conducted locally.
The attack complexity is low, and privileges required are also low.

Technical Details of CVE-2020-1624

This section delves into the specific technical aspects of the CVE.

Vulnerability Description

A local, authenticated user can access hashed login passwords and shared secrets through objmon configuration files.

Affected Systems and Versions

Product: Junos OS Evolved
Vendor: Juniper Networks
Vulnerable Version: All versions prior to 19.1R1

Exploitation Mechanism

An authenticated user with access to the shell can exploit this vulnerability.

Mitigation and Prevention

Discover the steps to mitigate and prevent exploitation of this vulnerability.

Immediate Steps to Take

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

Long-Term Security Practices

Regularly monitor and restrict access to critical system files to authorized personnel.
Implement user privilege management to control access to sensitive information.

Patching and Updates

Update affected systems to the following versions or newer: 19.1R1-EVO, 19.2R2-EVO, and subsequent releases.