CVE-2023-23548 : Security Advisory and Response

This CVE-2023-23548, assigned by Tribe29, was published on August 1, 2023. It pertains to a reflected Cross-Site Scripting (XSS) vulnerability found in the business intelligence feature of the Checkmk software versions below 2.2.0p8, 2.1.0p32, 2.0.0p38, and 1.6.0p30.

Understanding CVE-2023-23548

This section delves into the details of CVE-2023-23548, focusing on the vulnerability, its impacts, and affected systems and versions.

What is CVE-2023-23548?

The CVE-2023-23548 revolves around a reflected XSS vulnerability within the business intelligence component of Checkmk software versions below 2.2.0p8, 2.1.0p32, 2.0.0p38, and 1.6.0p30. This vulnerability can potentially allow attackers to inject malicious scripts into web pages viewed by other users.

The Impact of CVE-2023-23548

The impact of CVE-2023-23548 is assessed with a CVSS v3.1 base score of 5.4, categorizing it as a MEDIUM severity issue. The exploitability of this vulnerability depends on network access, user interaction, and the security context of the system.

Technical Details of CVE-2023-23548

This section provides technical insights into the vulnerability, including its description, affected systems, versions, and the mechanism of exploitation.

Vulnerability Description

The vulnerability involves a reflected Cross-Site Scripting (XSS) in the business intelligence feature of affected Checkmk versions. Attackers could leverage this flaw to execute malicious scripts in the context of a user's session.

Affected Systems and Versions

Checkmk software versions 2.2.0p8 and below, 2.1.0p32 and below, 2.0.0p38 and below, as well as 1.6.0p30 and below are susceptible to this XSS vulnerability.

Exploitation Mechanism

Exploiting this vulnerability entails crafting a malicious link or script that, when accessed by a victim through Checkmk's business intelligence feature, executes arbitrary code within the user's session.

Mitigation and Prevention

To address CVE-2023-23548, it is essential to take immediate steps, adopt long-term security practices, and apply necessary patches and updates to secure the affected systems.

Immediate Steps to Take

Users are advised to update their Checkmk software to versions that address the XSS vulnerability promptly. Additionally, organizations should educate users about the risks of interacting with untrusted links or content.

Long-Term Security Practices

Implementing secure coding practices, conducting regular security assessments, and staying informed about emerging threats are crucial for maintaining a robust security posture and preventing XSS vulnerabilities.

Patching and Updates

Checkmk users should regularly check for security updates and patches provided by the vendor to mitigate vulnerabilities like the one addressed in CVE-2023-23548. Keeping software up-to-date is key to reducing the risk of exploitation.