CVE-2023-29453 : Security Advisory and Response
Learn about CVE-2023-29453, a critical vulnerability in Zabbix's Agent2 package affected by code injection. Understand the impact, technical details, affected versions, and mitigation steps.
This article provides detailed information about CVE-2023-29453, a critical vulnerability affecting Zabbix's Agent2 package built with Go versions.
Understanding CVE-2023-29453
CVE-2023-29453 is a critical vulnerability related to how templates handle backticks in JavaScript strings. This flaw could allow an attacker to inject arbitrary JavaScript code into Go templates, leading to code inclusion.
What is CVE-2023-29453?
Templates in Zabbix do not properly handle backticks in JavaScript strings, potentially allowing malicious injection of JavaScript code into Go templates, leading to code inclusion vulnerabilities.
The Impact of CVE-2023-29453
The vulnerability has a CVSS base score of 9.8, indicating a critical severity level. It has a high impact on confidentiality, integrity, and availability, making it crucial to address promptly.
Technical Details of CVE-2023-29453
The vulnerability arises due to improper handling of backticks in JavaScript strings within Zabbix's templates, enabling attackers to inject malicious code.
Vulnerability Description
Templates in Zabbix fail to escape backticks used in JavaScript strings properly, allowing injection of arbitrary JavaScript code into Go templates, which can lead to code inclusion.
Affected Systems and Versions
Zabbix versions 5.0.0 to 5.0.34, 6.0.0 to 6.0.17, and 6.4.0 to 6.4.2 are affected by this vulnerability when using the Agent2 package.
Exploitation Mechanism
Attackers can exploit this vulnerability by crafting JavaScript strings with backticks to inject malicious code into Go templates, potentially leading to code inclusion and subsequent exploits.
Mitigation and Prevention
To protect systems from CVE-2023-29453, immediate action along with long-term security measures and patching is essential.
Immediate Steps to Take
It is crucial to apply the latest patches provided by Zabbix to address the vulnerability. Additionally, monitor for any unauthorized changes or access to mitigate the risk of exploitation.
Long-Term Security Practices
Implement strict input validation mechanisms, conduct regular security audits, and provide security awareness training to mitigate similar code injection vulnerabilities.
Patching and Updates
Ensure timely installation of security patches released by Zabbix to address CVE-2023-29453 and protect systems from potential exploitation.