CVE-2023-28972 : Vulnerability Insights and Analysis

This CVE record was published on April 17, 2023, by Juniper Networks regarding an Improper Link Resolution Before File Access vulnerability in Junos OS on NFX Series. This vulnerability allows an attacker to bypass console access controls and change the root password, potentially leading to administrative bypass with physical access to the console.

Understanding CVE-2023-28972

This section provides detailed information about the vulnerability, its impact, technical details, and mitigation strategies.

What is CVE-2023-28972?

CVE-2023-28972 is an Improper Link Resolution Before File Access vulnerability in console port access of Juniper Networks Junos OS on NFX Series. It allows unauthorized users to change the root password, enabling potential administrative bypass with physical access to the console.

The Impact of CVE-2023-28972

The impact of this vulnerability is serious as it can lead to unauthorized access to sensitive systems and data. By changing the root password via an insecure console, attackers can gain full administrative control over the affected devices.

Technical Details of CVE-2023-28972

The Vulnerability Description, Affected Systems and Versions, and Exploitation Mechanism are discussed below.

Vulnerability Description

When the "set system ports console insecure" option is enabled, root login is disallowed on Junos OS NFX Series systems. However, the root password can be changed, allowing potential administrative bypass with physical access to the console.

Affected Systems and Versions

Juniper Networks Junos OS versions prior to 22.4R1 on NFX Series are affected by this vulnerability. Specifically, versions 19.2 to 22.3 are vulnerable if not updated to the patched versions.

Exploitation Mechanism

Unauthorized users with physical access to the console port can exploit this vulnerability by changing the root password on affected systems, gaining administrative privileges.

Mitigation and Prevention

To address CVE-2023-28972, immediate steps, long-term security practices, and patching recommendations are crucial.

Immediate Steps to Take

Limit console access to the device to only trusted administrators to prevent unauthorized users from exploiting the vulnerability.

Long-Term Security Practices

Implement strict access control measures, regular security audits, and employee training to enhance overall cybersecurity posture and prevent similar incidents.

Patching and Updates

Juniper Networks has released software updates to address this vulnerability. It is recommended to upgrade affected systems to the following patched versions: 19.2R3-S7, 19.3R3-S8, 19.4R3-S12, 20.4R3-S7, 21.1R3-S5, 21.2R3-S4, 21.3R3-S3, 21.4R3-S2, 22.1R3-S1, 22.2R2-S1, 22.2R3, 22.3R1-S2, 22.3R2, 22.4R1, or any subsequent releases.