CVE-2025-34078

A local privilege escalation vulnerability exists in NSClient++ 0.5.2.35 when both the web interface and ExternalScripts features are enabled. The configuration file (nsclient.ini) stores the administrative password in plaintext and is readable by local users. By extracting this password, an attacker can authenticate to the NSClient++ web interface (typically accessible on port 8443) and abuse the ExternalScripts plugin to inject and execute arbitrary commands as SYSTEM by registering a custom script, saving the configuration, and triggering it via the API. This behavior is documented but insecure, as the plaintext credential exposure undermines access isolation between local users and administrative functions.

CVSS

No CVSS.

References

Link	Resource
https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/local/nscp_pe.rb
https://vulncheck.com/advisories/nsclient-localtoremote-system-compromise
https://www.exploit-db.com/exploits/46802
https://www.exploit-db.com/exploits/48360

Configurations

No configuration.

History

03 Jul 2025, 15:13

Type	Values Removed	Values Added
Summary		(es) Existe una vulnerabilidad de escalada de privilegios local en NSClient++ 0.5.2.35 cuando tanto la interfaz web como las funciones de ExternalScripts están habilitadas. El archivo de configuración (nsclient.ini) almacena la contraseña administrativa en texto plano y es legible para los usuarios locales. Al extraer esta contraseña, un atacante puede autenticarse en la interfaz web de NSClient++ (normalmente accesible en el puerto 8443) y abusar del complemento ExternalScripts para inyectar y ejecutar comandos arbitrarios como SYSTEM. Para ello, registra un script personalizado, guarda la configuración y lo activa mediante la API. Este comportamiento está documentado, pero es inseguro, ya que la exposición de las credenciales en texto plano vulnera el aislamiento de acceso entre los usuarios locales y las funciones administrativas.

02 Jul 2025, 20:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-07-02 20:15

Updated : 2025-07-03 15:13

NVD link : CVE-2025-34078

Mitre link : CVE-2025-34078

CVE.ORG link : CVE-2025-34078

JSON object : View

Products Affected

No product.

CWE

CWE-269

Improper Privilege Management

CWE-312

Cleartext Storage of Sensitive Information

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