Overview
CVE-2025-58122 is a security vulnerability identified in Checkmk version 2.4.0 before version 2.4.0p16. This vulnerability stems from insufficient permission validation within the REST API, allowing low-privileged users to modify notification parameters. This unauthorized access can lead to a variety of security risks, including unauthorized actions and potential information disclosure.
Technical Details
The vulnerability lies in the lack of proper authorization checks when handling requests to modify notification parameters via the Checkmk REST API. A low-privileged user, with limited access rights, can exploit this flaw to alter notification settings. This means they could potentially redirect notifications, modify their content, or even disable them entirely. The specific REST API endpoints affected require further investigation within the Checkmk codebase, but the core issue revolves around the absence of adequate validation to confirm the user’s authority to modify these settings.
CVSS Analysis
Currently, a CVSS score and severity rating are not available (N/A) for CVE-2025-58122. However, the potential impact of unauthorized notification modification suggests a medium to high severity, depending on the criticality of the monitored systems and the sensitivity of the information contained in the notifications. A formal CVSS score is expected to be published as analysis is completed. Evaluate based on your specific Checkmk environment.
Possible Impact
The potential impact of CVE-2025-58122 can be significant:
- Unauthorized Actions: Attackers could manipulate notifications to trigger false alarms or suppress genuine alerts, disrupting monitoring processes.
- Information Disclosure: Modified notification parameters might inadvertently expose sensitive information contained in the original notifications.
- Denial of Service (DoS): By disabling or flooding notification channels, attackers could prevent legitimate administrators from receiving critical alerts about system issues.
- Privilege Escalation: While not a direct privilege escalation, the ability to control notifications could be a stepping stone to further compromise the system.
Mitigation or Patch Steps
The primary mitigation step is to upgrade Checkmk to version 2.4.0p16 or later. This version includes the necessary security fixes to address the insufficient permission validation.
- Upgrade Checkmk: Immediately upgrade your Checkmk instance to version 2.4.0p16 or a later version.
- Review User Permissions: Audit and review user permissions within Checkmk, ensuring that low-privileged users have only the necessary access rights.
- Monitor REST API Usage: Implement monitoring and logging mechanisms to detect suspicious activity on the Checkmk REST API.
