CVE-2024-0670 in Checkmk
Summary
by MITRE • 03/11/2024
Privilege escalation in windows agent plugin in Checkmk before 2.2.0p23, 2.1.0p40 and 2.0.0 (EOL) allows local user to escalate privileges
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Analysis
by VulDB Data Team • 12/10/2024
The vulnerability identified as CVE-2024-0670 represents a critical privilege escalation flaw within the Windows agent plugin component of Checkmk monitoring software. This issue affects multiple versions including the latest stable releases before 2.2.0p23 and 2.1.0p40, as well as the end-of-life 2.0.0 version. The vulnerability specifically targets local users who can exploit this weakness to elevate their privileges from standard user level to administrative rights, creating a significant security risk for organizations relying on Checkmk for system monitoring. The flaw exists within the Windows agent plugin implementation and demonstrates a fundamental failure in privilege management and access control mechanisms.
The technical root cause of this privilege escalation vulnerability stems from improper handling of permissions and access controls within the Windows agent plugin. When a local user interacts with the monitoring agent, the system fails to properly validate or restrict privilege levels during certain operations, allowing unauthorized elevation of privileges. This type of vulnerability typically falls under CWE-276 which specifically addresses improper privilege management, and may also relate to CWE-732 which covers inadequate permissions for critical resources. The flaw likely involves insufficient input validation, improper privilege separation, or inadequate access control checks that enable a local user to manipulate system resources beyond their intended scope.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with the foundation for more sophisticated attacks within the compromised system. Once a local user achieves administrative privileges through this vulnerability, they can execute arbitrary code, modify system configurations, access sensitive data, and potentially establish persistent access points. This creates a significant risk for organizations where Checkmk is deployed, as the vulnerability can be exploited by both malicious insiders and external attackers who gain initial access through other means. The impact is particularly severe in enterprise environments where monitoring systems are often granted elevated privileges and serve as critical infrastructure components. From an ATT&CK framework perspective, this vulnerability maps to techniques such as privilege escalation and persistence, potentially enabling tactics like T1068 (Local Privilege Escalation) and T1543 (Create or Modify System Process) to be executed more effectively.
Organizations affected by this vulnerability should immediately implement the available patches from Checkmk, specifically upgrading to versions 2.2.0p23, 2.1.0p40 or later releases. System administrators should also conduct comprehensive security assessments of their Checkmk installations, reviewing access controls and privilege assignments to minimize the attack surface. Additional mitigations include implementing least privilege principles for the monitoring agent, disabling unnecessary features, and monitoring for suspicious privilege escalation activities. Network segmentation and access controls should be reviewed to ensure that even if exploitation occurs, lateral movement remains limited. The vulnerability highlights the importance of maintaining up-to-date monitoring solutions and implementing proper security controls around critical infrastructure components, as these systems often serve as targets for attackers seeking to establish persistent access within networks.