CVE-2020-5796 Explained : Impact and Mitigation

Nagios XI 5.7.4 allows a local, low-privileged, authenticated user to execute arbitrary PHP code with root privileges due to improper permissions preservation.

Understanding CVE-2020-5796

This CVE involves a vulnerability in Nagios XI 5.7.4 that enables a local user to escalate privileges.

What is CVE-2020-5796?

The vulnerability in Nagios XI 5.7.4 allows a low-privileged, authenticated user to manipulate file permissions, leading to the execution of arbitrary PHP code with root privileges.

The Impact of CVE-2020-5796

The vulnerability poses a significant risk as it enables unauthorized users to gain root-level access, potentially compromising the entire system's security.

Technical Details of CVE-2020-5796

This section provides more technical insights into the CVE.

Vulnerability Description

The flaw in Nagios XI 5.7.4 allows a local, low-privileged user to weaken file permissions, granting the ability to write and execute PHP code with root privileges.

Affected Systems and Versions

Product: Nagios XI
Version: 5.7.4

Exploitation Mechanism

The vulnerability can be exploited by a local, authenticated user to modify file permissions, enabling the execution of malicious PHP code with elevated privileges.

Mitigation and Prevention

Protecting systems from CVE-2020-5796 requires immediate action and long-term security measures.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Restrict access to vulnerable systems to authorized personnel only.
Monitor system logs for any suspicious activities.

Long-Term Security Practices

Implement the principle of least privilege to restrict user permissions.
Conduct regular security audits and vulnerability assessments.
Educate users on secure coding practices and the importance of maintaining system integrity.

Patching and Updates

Regularly update Nagios XI to the latest version to ensure that security patches are applied and vulnerabilities are mitigated effectively.