CVE-2019-7341 in ZoneMinder
Summary
by MITRE
Reflected - Cross Site Scripting (XSS) exists in ZoneMinder through 1.32.3, allowing an attacker to execute HTML or JavaScript code via a vulnerable 'newMonitor[LinkedMonitors]' parameter value in the view monitor (monitor.php) because proper filtration is omitted.
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Analysis
by VulDB Data Team • 07/06/2023
The vulnerability identified as CVE-2019-7341 represents a critical reflected cross site scripting flaw within ZoneMinder version 1.32.3 and earlier. This security weakness resides in the monitor.php web application component where user input is not properly sanitized before being rendered back to the browser. The specific parameter 'newMonitor[LinkedMonitors]' serves as the attack vector, allowing malicious actors to inject arbitrary HTML or JavaScript code that executes in the context of other users' browsers. This vulnerability falls under the CWE-79 category of Cross Site Scripting, which is classified as a fundamental web application security flaw that enables attackers to inject client-side scripts into web pages viewed by other users. The reflected nature of this vulnerability means that the malicious script is reflected off the web server back to the victim's browser, making it particularly dangerous for web applications that process user input directly without proper validation or encoding mechanisms.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform various malicious activities including session hijacking, credential theft, data exfiltration, and redirection to malicious websites. An attacker could craft a malicious URL containing crafted JavaScript code within the LinkedMonitors parameter, which when clicked by an authenticated user would execute the payload in their browser context. This could lead to unauthorized access to surveillance footage, modification of monitoring configurations, or even complete compromise of the ZoneMinder system if the attacker can escalate privileges through the XSS attack. The vulnerability is particularly concerning for security monitoring environments where ZoneMinder is used, as it undermines the integrity of the security infrastructure and could allow attackers to bypass monitoring systems that rely on the application's trust model. The attack requires minimal sophistication and can be executed through social engineering tactics, making it a significant threat to organizations that depend on ZoneMinder for their security operations.
Organizations utilizing ZoneMinder should implement immediate mitigations including input validation and output encoding for all user-supplied parameters. The recommended approach involves implementing proper sanitization of the 'newMonitor[LinkedMonitors]' parameter through the use of HTML entity encoding before rendering any user input in the web interface. Additionally, implementing Content Security Policy headers can provide an additional layer of protection against XSS attacks by restricting the sources from which scripts can be loaded. The vulnerability demonstrates the critical importance of input validation and output encoding practices as outlined in the OWASP Top Ten and MITRE ATT&CK framework under the technique T1059.007 for Command and Scripting Interpreter. Security teams should also consider implementing web application firewalls to detect and block malicious payloads attempting to exploit this vulnerability. Regular security updates and patch management processes should be enforced to ensure that all systems running ZoneMinder remain protected against known vulnerabilities. The remediation process should include comprehensive testing of the application's input handling mechanisms to verify that all user-supplied data is properly validated and encoded before being processed or displayed in the user interface.