NSClient++ 0.5.2.35 Local Privilege Escalation via ExternalScripts and Web Interface

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.

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不充分的凭证保护机制

NSClient++ 安全漏洞

NSClient++是NSClient开源的一个用于Windows系统的监控代理程序。 NSClient++ 0.5.2.35版本存在安全漏洞，该漏洞源于配置不安全，可能导致权限提升。

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