CVE-2020-28906 Explained : Impact and Mitigation

Nagios XI and Nagios Fusion are affected by an Incorrect File Permissions vulnerability that could lead to Privilege Escalation to root.

Understanding CVE-2020-28906

This CVE involves a security issue in Nagios XI and Nagios Fusion versions that allows low-privileged users to escalate their privileges to root by modifying certain files.

What is CVE-2020-28906?

The vulnerability in Nagios XI 5.7.5 and earlier, and Nagios Fusion 4.1.8 and earlier, enables low-privileged users to alter files executed by root, potentially leading to Privilege Escalation.

The Impact of CVE-2020-28906

The vulnerability poses a risk of unauthorized users gaining root access, compromising the integrity and security of the system. It could result in unauthorized system modifications and data breaches.

Technical Details of CVE-2020-28906

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The Incorrect File Permissions issue in Nagios XI and Nagios Fusion versions allows low-privileged users to modify files executed by root, leading to Privilege Escalation.

Affected Systems and Versions

Nagios XI 5.7.5 and earlier
Nagios Fusion 4.1.8 and earlier

Exploitation Mechanism

Low-privileged users exploit the vulnerability by manipulating files included in scripts executed by root.

Mitigation and Prevention

Protecting systems from CVE-2020-28906 requires immediate actions and long-term security measures.

Immediate Steps to Take

Apply security patches provided by Nagios for the affected versions.
Restrict access permissions to critical system files to authorized users only.
Monitor system logs for any suspicious activities related to file modifications.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Implement the principle of least privilege to restrict user access rights.
Conduct regular security audits and penetration testing to identify and address security gaps.

Patching and Updates

Stay informed about security updates and patches released by Nagios for Nagios XI and Nagios Fusion.
Promptly apply patches to mitigate the vulnerability and enhance system security.