CVE-2019-15230 in LibreNMS
Summary
by MITRE
LibreNMS v1.54 has XSS in the Create User, Inventory, Add Device, Notifications, Alert Rule, Create Maintenance, and Alert Template sections of the admin console. This could lead to cookie stealing and other malicious actions. This vulnerability can be exploited with an authenticated account.
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Analysis
by VulDB Data Team • 12/07/2023
LibreNMS version 1.54 contains a cross-site scripting vulnerability classified as CVE-2019-15230 that affects multiple administrative sections of the application. This vulnerability exists in the Create User, Inventory, Add Device, Notifications, Alert Rule, Create Maintenance, and Alert Template functionalities within the admin console. The flaw represents a critical security weakness that allows authenticated attackers to inject malicious scripts into web pages viewed by other users. The vulnerability stems from insufficient input validation and output encoding mechanisms that fail to properly sanitize user-supplied data before rendering it in the application's web interface. Attackers can exploit this weakness by submitting malicious payloads through the affected form fields, which then get executed in the context of other users' browsers. This type of vulnerability falls under the CWE-79 category for Cross-Site Scripting, specifically representing a stored XSS attack vector where malicious scripts are permanently stored on the server and executed whenever affected pages are accessed.
The operational impact of this vulnerability is severe as it provides attackers with the capability to perform cookie theft, session hijacking, and other malicious activities within the targeted environment. When authenticated users view pages containing the injected scripts, their browser sessions become compromised, potentially allowing attackers to impersonate legitimate users and gain unauthorized access to sensitive administrative functions. The vulnerability affects the entire administrative console functionality, making it particularly dangerous as it spans multiple critical areas of the application. An attacker could leverage this vulnerability to escalate privileges, modify user accounts, access confidential network information, or even execute arbitrary commands within the application's context. The stored nature of the XSS vulnerability means that once the malicious payload is injected, it can affect multiple users over time without requiring repeated exploitation attempts.
Security practitioners should implement immediate mitigations to address this vulnerability through comprehensive input validation, output encoding, and proper content security policy implementation. The most effective approach involves sanitizing all user inputs across the affected administrative sections and ensuring that all output is properly encoded before rendering in web pages. Organizations should also consider implementing strict content security policies to prevent script execution in the browser context. Regular security updates and patches should be applied immediately upon availability, as this vulnerability affects a core administrative functionality that provides attackers with significant access privileges. The ATT&CK framework categorizes this vulnerability under T1059.007 for Scripting and T1531 for Account Access Removal, highlighting the potential for privilege escalation and unauthorized access to system resources. Additionally, organizations should conduct thorough security assessments of their LibreNMS installations to identify any other potential XSS vulnerabilities and implement proper web application firewall rules to detect and block suspicious script injection attempts.