CVE-2023-40311 Explained : Impact and Mitigation

Multiple stored XSS vulnerabilities were found in OpenNMS Horizon, affecting versions 31.0.8 and earlier than 32.0.2 on various platforms. This vulnerability allows attackers to store malicious scripts in the database and execute them through JSPs or Angular templates. Immediate action is recommended to prevent exploitation.

Understanding CVE-2023-40311

This CVE discloses multiple stored XSS vulnerabilities in OpenNMS Horizon, impacting versions 31.0.8 and prior to 32.0.2, across different platforms.

What is CVE-2023-40311?

CVE-2023-40311 exposes multiple stored XSS flaws in OpenNMS Horizon, letting attackers store and execute malicious scripts via unsanitized parameters in JSP files.

The Impact of CVE-2023-40311

The vulnerability poses a medium risk, with a CVSS base score of 6.7 and high confidentiality and integrity impacts. Successful exploitation could lead to stored XSS attacks, compromising sensitive data.

Technical Details of CVE-2023-40311

The stored XSS vulnerability in OpenNMS Horizon stems from unsanitized parameters in various JSP files, allowing attackers to inject and execute malicious scripts.

Vulnerability Description

The flaw permits attackers to insert malicious scripts into the database and execute them through JSPs or Angular templates, making it a critical security risk.

Affected Systems and Versions

OpenNMS Horizon versions 31.0.8 and below, up to but excluding 32.0.2, are susceptible to the stored XSS vulnerability on Windows, MacOS, and Linux platforms.

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts into JSP files with unsanitized parameters, paving the way for stored cross-site scripting attacks.

Mitigation and Prevention

It is crucial to take immediate action to address CVE-2023-40311 and prevent potential exploitation through the following measures.

Immediate Steps to Take

Upgrade to the latest secure versions, such as Meridian 2023.1.6, 2022.1.19, 2021.1.30, 2020.1.38, or Horizon 32.0.2 to mitigate the stored XSS risk.

Long-Term Security Practices

Ensure secure coding practices, conduct regular security assessments, and educate teams on preventing XSS vulnerabilities to enhance long-term security.

Patching and Updates

Stay informed about security patches and updates from OpenNMS to promptly address any vulnerabilities and secure your systems.