Overview
CVE-2025-34322 describes an authenticated command injection vulnerability affecting Nagios Log Server versions prior to 2026R1.0.1. This vulnerability resides within the experimental ‘Natural Language Queries’ feature. Specifically, insufficient validation of configuration values allows an authenticated user with access to global configuration settings to inject and execute arbitrary operating system commands.
Technical Details
The vulnerability stems from the ‘Natural Language Queries’ feature in Nagios Log Server, which allows users to query logs using natural language. Configuration values related to this feature are read from the application settings. These settings are then incorporated into a system command that is executed by the server. Due to a lack of proper input sanitization or restriction of special characters, an attacker can manipulate these configuration values to inject arbitrary commands. This allows an authenticated user, with the necessary permissions to modify global configuration settings, to execute malicious commands with the privileges of the web server account.
The attack vector involves modifying vulnerable configuration parameters within the ‘Natural Language Queries’ settings to include shell metacharacters (e.g., `;`, `|`, `&&`, `||`). When the server processes these maliciously crafted settings, the injected commands are executed alongside the intended system commands.
CVSS Analysis
Currently, a CVSS score has not been assigned for CVE-2025-34322. However, given the potential for arbitrary command execution and the resulting compromise of the Log Server host, a high severity rating is anticipated. A CVSS score will be updated here as soon as it becomes available.
Note: CVSS score will be updated upon official assignment.
Possible Impact
Successful exploitation of CVE-2025-34322 can lead to a complete compromise of the Nagios Log Server host. An attacker can leverage this vulnerability to:
- Gain unauthorized access to sensitive data stored on the server.
- Modify or delete log data, potentially covering up malicious activity.
- Pivot to other systems within the network.
- Install malware or other malicious software on the Log Server host.
- Disrupt the operation of the Log Server and related services.
Because Nagios Log Server often handles a large volume of security related logs, compromise can seriously impact forensic and incident response capabilities.
Mitigation and Patch Steps
The recommended mitigation is to upgrade to Nagios Log Server version 2026R1.0.1 or later. This version contains a fix that addresses the command injection vulnerability by implementing proper input validation and sanitization of configuration values.
- Upgrade Nagios Log Server: The primary mitigation is to upgrade to the latest version (2026R1.0.1 or later) of Nagios Log Server.
- Restrict Access: Limit access to global configuration settings to only authorized personnel. Use strong authentication mechanisms.
- Monitor System Activity: Implement monitoring solutions to detect suspicious activity on the Log Server, such as unexpected processes or network connections.
References
Nagios Log Server 2026R1.0.1 Changelog
Nagios Security Information
VulnCheck Advisory for CVE-2025-34322
