CVE-2025-30054 in Clininet
Summary
by MITRE • 10/23/2026
CGM CLININET is vulnerable to local privilege escalation. The service that processes incoming HL7 messages runs with root privileges, but due to incorrect permissions, its scripts and configuration files can be modified by the uhcapache user. An attacker with uhcapache privileges can modify these files to execute arbitrary code as root.
The vulnerability was confirmed to affect versions up to 2026.MS3 but later versions may also be vulnerable.
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Analysis
by VulDB Data Team • 10/23/2026
CGM CliniNet, a widely deployed clinical information system used for managing patient data and medical workflows, contains a critical local privilege escalation vulnerability that allows an attacker with limited user privileges to gain full administrative control over the host operating system. This flaw stems from a fundamental misconfiguration in how the application handles file permissions for its core processing components. Specifically, the service responsible for parsing and processing incoming HL7 messages operates under root-level credentials to ensure it can interact deeply with hardware interfaces and write critical logs or data files without restriction. While running as root is often necessary for medical devices to maintain reliability and access low-level system resources, this elevated privilege level introduces significant risk if not paired with strict file integrity controls.
The technical flaw lies in the incorrect permission settings applied to the scripts and configuration files utilized by the HL7 processing service. Although the executable binary or daemon runs as root, the associated script files and configuration directories are writable by the uhcapache user account. This user is typically assigned lower privileges for web-based interactions within the application but possesses sufficient access rights to alter these critical system files. Consequently, an attacker who compromises the uhcapache account through any vector such as a cross-site scripting attack on the web interface or exploiting another local vulnerability can directly modify these configuration and script files. By injecting malicious code into these writable locations, the attacker ensures that when the HL7 service executes its next routine task under root privileges, it inadvertently runs the injected payload with full system administrator rights.
This type of vulnerability is classified as CWE-269 Improper Privilege Management because the application fails to enforce the principle of least privilege effectively across all components involved in a privileged operation. The separation between the execution context and file access controls is broken, allowing lower-privileged entities to influence high-privileged processes through shared writable resources. In terms of offensive security frameworks, this aligns with ATT&CK technique T1068 Exploitation for Privilege Escalation, where an adversary leverages software vulnerabilities or misconfigurations to move from a low-level user context to a higher-level system account. The ability to execute arbitrary code as root effectively grants the attacker complete control over the clinical information system, enabling them to exfiltrate sensitive patient health information, modify medical records, disrupt critical care workflows by shutting down services, or use the compromised machine as a pivot point for further network attacks against other hospital systems.
The operational impact of this vulnerability is severe given the sensitivity of healthcare data and the continuous availability requirements of clinical environments. An attacker could manipulate HL7 messages to alter patient diagnoses, medication orders, or lab results before they are processed by downstream systems like electronic health records or pharmacy management tools. Furthermore, gaining root access allows for persistent backdoors that survive system reboots, making detection difficult without comprehensive endpoint monitoring. The vulnerability has been confirmed in versions up to 2026.MS3, but due to the nature of permission misconfigurations often being inherited across releases or requiring specific deployment conditions, later versions may also remain susceptible if not explicitly patched by the vendor.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. The most effective short-term fix is for the system administrator to correct file permissions so that only root-owned processes can write to the HL7 processing scripts and configuration files, removing write access from the uhcapache user entirely. Additionally, implementing mandatory access control systems such as SELinux or AppArmor can restrict what actions even privileged users are allowed to perform on specific files, adding a layer of defense-in-depth. Long-term solutions should involve refactoring the application architecture to minimize root usage for routine tasks and employing code signing mechanisms to verify the integrity of configuration files before execution. Regular security audits focusing on file ownership and permissions across all service accounts are essential to prevent similar privilege escalation vectors in other components of the clinical infrastructure.