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CVE-2023-4979 : Exploit Details and Defense Strategies

CVE-2023-4979: Cross-site Scripting (XSS) flaw in GitHub librenms/librenms < v23.9.0. Impact rated HIGH. Learn mitigation steps & update info.

This CVE-2023-4979 involves a Cross-site Scripting (XSS) vulnerability that is reflected in the GitHub repository librenms/librenms before version 23.9.0.

Understanding CVE-2023-4979

This section will provide insights into the nature of CVE-2023-4979 and its impact on systems.

What is CVE-2023-4979?

CVE-2023-4979 is a Cross-site Scripting (XSS) vulnerability found in the GitHub repository librenms/librenms. This vulnerability exists in versions prior to 23.9.0, allowing attackers to inject malicious scripts into web pages viewed by other users.

The Impact of CVE-2023-4979

The impact of this vulnerability is rated as HIGH, with a base score of 8.8 according to the CVSS v3.0 metrics. It can lead to significant confidentiality, integrity, and availability issues for affected systems.

Technical Details of CVE-2023-4979

Delving deeper into the technical aspects of CVE-2023-4979 to understand its implications better.

Vulnerability Description

The vulnerability stems from improper neutralization of input during web page generation (CWE-79), enabling attackers to execute malicious scripts in the context of legitimate user sessions.

Affected Systems and Versions

The vulnerability affects the vendor librenms in the product librenms/librenms with versions less than 23.9.0 being susceptible to exploitation.

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting specially formatted URLs or input fields that, when executed, inject malicious scripts into web pages viewed by unsuspecting users.

Mitigation and Prevention

Taking immediate steps to mitigate the risks posed by CVE-2023-4979 is crucial to safeguard systems and data.

Immediate Steps to Take

        Update to version 23.9.0 or later of librenms/librenms to patch the vulnerability and prevent exploitation.
        Implement strict input validation mechanisms to sanitize user input and prevent script injection.
        Educate users about the dangers of clicking on suspicious links or input fields to reduce the risk of XSS attacks.

Long-Term Security Practices

        Regularly monitor and audit web applications for potential security vulnerabilities, including XSS flaws.
        Stay informed about security updates and best practices from reliable sources to enhance overall cybersecurity posture.
        Conduct thorough security testing, including vulnerability scanning and penetration testing, to identify and address potential weaknesses proactively.

Patching and Updates

Ensure timely application of security patches and updates released by librenms to address known vulnerabilities like CVE-2023-4979 and enhance the security of systems and applications.

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