CVE-2023-28966 Explained : Impact and Mitigation

This CVE, assigned by Juniper, pertains to an Incorrect Default Permissions vulnerability in Juniper Networks Junos OS Evolved. The vulnerability allows a low-privileged local attacker with shell access to execute CLI commands as root. The issue arises from improper file and directory permissions on certain system files, enabling an attacker to inject commands as root.

Understanding CVE-2023-28966

This section provides insights into the nature and impact of CVE-2023-28966.

What is CVE-2023-28966?

CVE-2023-28966 is an Incorrect Default Permissions vulnerability in Juniper Networks Junos OS Evolved. It permits a low-privileged local attacker to manipulate files or execute commands with root privileges due to improper permission settings on specific system files.

The Impact of CVE-2023-28966

The impact of this vulnerability is significant, as it allows unauthorized users to escalate their privileges and potentially compromise the system's confidentiality, integrity, and availability.

Technical Details of CVE-2023-28966

Delve deeper into the technical aspects of CVE-2023-28966 to understand its implications and risk factors.

Vulnerability Description

The vulnerability in Juniper Networks Junos OS Evolved arises from incorrect default permissions on system files, enabling local attackers to execute commands as root.

Affected Systems and Versions

Juniper Networks Junos OS Evolved versions prior to 20.4R3-S5-EVO, 21.2R3-EVO, and 21.3R2-EVO are affected by this vulnerability.

Exploitation Mechanism

The vulnerability allows low-privileged local attackers with shell access to modify files or execute commands as root, leveraging the improper file and directory permissions on specific system files.

Mitigation and Prevention

Explore the steps to mitigate and prevent exploitation of CVE-2023-28966 for enhanced system security.

Immediate Steps to Take

Limit access to the system shell to trusted administrators only to reduce the risk of exploitation by unauthorized users.

Long-Term Security Practices

Implement robust security measures and regular security audits to identify and address similar vulnerabilities promptly.

Patching and Updates

Juniper Networks has released updated versions to address this specific vulnerability: Junos OS Evolved 20.4R3-S5-EVO, 21.2R3-EVO, 21.3R2-EVO, 21.4R1-EVO, and all subsequent releases. It is crucial to apply these patches promptly to secure the system against potential exploits.