CVE-2018-11223 in Pandora FMS
Summary
by MITRE
XSS in Artica Pandora FMS before 7.0 NG 723 allows an attacker to execute arbitrary code via a crafted "refr" parameter in a "/pandora_console/index.php?sec=estado&sec2=operation/agentes/estado_agente&refr=" call.
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Analysis
by VulDB Data Team • 02/19/2020
The vulnerability CVE-2018-11223 represents a cross-site scripting flaw in the Artica Pandora FMS platform prior to version 7.0 NG 723. This security weakness resides within the web application's handling of user input parameters, specifically the "refr" parameter in the designated URL path that manages agent status operations. The vulnerability allows malicious actors to inject arbitrary code through carefully crafted input that bypasses the application's security controls. The affected endpoint /pandora_console/index.php?sec=estado&sec2=operation/agentes/estado_agente&refr= demonstrates a classic parameter manipulation attack vector where the application fails to properly sanitize or validate the refr parameter before rendering it in the web response. This particular flaw falls under the CWE-79 category of Cross-Site Scripting, which is a well-documented vulnerability pattern that enables attackers to inject client-side scripts into web pages viewed by other users. The impact extends beyond simple script execution as it can lead to session hijacking, credential theft, and full compromise of user sessions. According to ATT&CK framework, this vulnerability maps to T1059.001 for Command and Scripting Interpreter and T1566 for Phishing, as attackers can leverage the XSS to deliver malicious payloads and establish persistent access to the targeted environment. The vulnerability is particularly dangerous in enterprise monitoring contexts where Pandora FMS is used for critical infrastructure management, as successful exploitation could allow attackers to gain unauthorized access to sensitive operational data and potentially disrupt monitoring operations. The flaw represents a failure in input validation and output encoding practices within the web application's security architecture. When users navigate to the affected URL with malicious input in the refr parameter, the application processes the input without adequate sanitization, allowing malicious scripts to be executed in the context of other users' browsers. This creates a persistent threat that can be exploited by attackers who craft malicious URLs or inject payloads through various attack vectors such as email phishing campaigns or compromised web pages. The vulnerability's severity is amplified by the fact that it affects the core operational functionality of the monitoring platform, potentially allowing attackers to manipulate agent status information and hide malicious activities from detection systems. Organizations using older versions of Pandora FMS should immediately implement security patches or mitigations, as the vulnerability provides attackers with a direct path to execute arbitrary code in user browsers and potentially escalate privileges within the monitored environment. The flaw highlights the importance of implementing proper input validation, output encoding, and security headers to prevent such attacks from occurring in production environments.
The technical exploitation of CVE-2018-11223 requires understanding the web application's architecture and parameter handling mechanisms. Attackers can construct malicious URLs containing script payloads within the refr parameter that will execute when other users access the affected page. The vulnerability exists due to insufficient sanitization of user-supplied data before it is rendered in the web interface, creating an opening for malicious script injection. This type of vulnerability is particularly concerning because it operates at the application layer and can be exploited through simple web browser interactions. The affected version of Pandora FMS fails to implement proper security measures such as Content Security Policy headers, input validation routines, or output encoding mechanisms that would normally prevent such attacks from succeeding. Security researchers have identified that this vulnerability follows common patterns associated with DOM-based XSS attacks where the malicious payload is executed in the browser's DOM rather than being stored on the server. The exploitation process typically involves crafting a URL with malicious JavaScript code embedded in the refr parameter, which when loaded by a victim's browser executes the attacker's payload. This payload can perform various malicious activities including stealing session cookies, redirecting users to malicious sites, or injecting additional malware into the victim's browser environment. The vulnerability's impact is further magnified because it affects the monitoring and management interface of the platform, potentially allowing attackers to gain unauthorized access to operational data and disrupt monitoring activities. Organizations should implement comprehensive security measures including regular patching, web application firewalls, and security monitoring to prevent exploitation of this vulnerability. The attack surface is particularly broad given that the affected URL path is commonly accessed within operational environments where multiple users interact with the monitoring platform on a regular basis. The vulnerability also demonstrates the need for proper security training for developers and administrators to understand the importance of input validation and output encoding in preventing such attacks. According to industry best practices and security frameworks, this vulnerability should be addressed through immediate patching, implementation of security headers, and comprehensive testing of input validation controls to ensure that user-supplied data cannot be used to inject malicious content into the application's output.
The operational impact of CVE-2018-11223 extends beyond simple code execution to encompass potential data breaches, service disruption, and compromise of monitoring integrity. When exploited successfully, this vulnerability allows attackers to inject malicious scripts that can harvest session tokens, credentials, or other sensitive information from users interacting with the Pandora FMS interface. The monitoring platform's role in enterprise security infrastructure makes this vulnerability particularly dangerous as it could be used to hide malicious activities from detection systems or to gain unauthorized access to critical operational data. The vulnerability's persistence across multiple user sessions means that once exploited, attackers can maintain access to the system for extended periods without requiring repeated exploitation attempts. Organizations that rely on Pandora FMS for infrastructure monitoring face significant risk if this vulnerability remains unpatched, as it could enable attackers to manipulate agent status information and potentially disrupt critical monitoring operations. The attack vector is particularly insidious because it can be delivered through seemingly legitimate web interactions, making detection and prevention more challenging for security teams. The vulnerability also creates opportunities for attackers to escalate privileges within the monitored environment, potentially gaining access to additional systems or data beyond the initial compromised session. Security teams should implement comprehensive monitoring solutions to detect anomalous behavior in the web application and establish incident response procedures specifically designed to address XSS vulnerabilities. The vulnerability's presence in the monitoring platform's core functionality means that its exploitation could have cascading effects on the organization's overall security posture, potentially compromising other systems that depend on accurate monitoring data. Mitigation efforts should include immediate patch deployment, implementation of security headers such as Content Security Policy, and regular security assessments to identify similar vulnerabilities in other components of the platform. Organizations should also consider implementing additional security controls such as web application firewalls and intrusion detection systems to provide layered protection against exploitation attempts. The vulnerability's impact is further compounded by the fact that it affects the platform's administrative interface, potentially allowing attackers to gain elevated privileges and access to sensitive configuration data. Proper security awareness training for system administrators and developers is essential to prevent similar vulnerabilities from being introduced in future versions of the platform and to ensure that security considerations are integrated throughout the development lifecycle.