CVE-2021-46088 : Security Advisory and Response

Zabbix 4.0 LTS, 4.2, 4.4, and 5.0 LTS is vulnerable to Remote Code Execution (RCE) where any user with the "Zabbix Admin" role can run custom shell scripts on the application server.

Understanding CVE-2021-46088

This CVE relates to a vulnerability in Zabbix versions 4.0 LTS, 4.2, 4.4, and 5.0 LTS, allowing RCE.

What is CVE-2021-46088?

Zabbix software versions 4.0 LTS, 4.2, 4.4, and 5.0 LTS are exposed to a security flaw enabling any user possessing the "Zabbix Admin" role to execute custom shell commands on the application server.

The Impact of CVE-2021-46088

The vulnerability grants unauthorized users with elevated privileges, such as "Zabbix Admin," the ability to run arbitrary shell scripts on the server, potentially leading to unauthorized remote code execution.

Technical Details of CVE-2021-46088

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The flaw in Zabbix versions 4.0 LTS, 4.2, 4.4, and 5.0 LTS allows users with the "Zabbix Admin" role to execute custom shell scripts on the application server.

Affected Systems and Versions

Zabbix 4.0 LTS
Zabbix 4.2
Zabbix 4.4
Zabbix 5.0 LTS

Exploitation Mechanism

Unauthorized users with the "Zabbix Admin" role can exploit this vulnerability by running custom shell scripts on the application server, gaining access to execute arbitrary commands.

Mitigation and Prevention

Learn how to mitigate and prevent exploitation of CVE-2021-46088.

Immediate Steps to Take

Upgrade Zabbix to a patched version immediately.
Limit user privileges to minimize the impact of potential exploitation.

Long-Term Security Practices

Regularly review and update user roles and permissions.
Implement network segmentation to restrict unauthorized access.

Patching and Updates

Apply the latest patches and updates provided by Zabbix to address the vulnerability.