CVE-2016-10203 in ZoneMinder
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Zoneminder 1.30 and earlier allows remote attackers to inject arbitrary web script or HTML via the name when creating a new monitor.
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Analysis
by VulDB Data Team • 09/03/2020
The vulnerability identified as CVE-2016-10203 represents a critical cross-site scripting flaw within ZoneMinder version 1.30 and earlier systems. This security weakness exists in the monitor creation functionality where user-supplied input is not properly sanitized before being rendered in web pages. The vulnerability specifically affects the name parameter used when creating new monitor entries, making it a prime target for malicious actors seeking to exploit web application security gaps. ZoneMinder, a popular open-source video surveillance software, is widely deployed in security monitoring environments where such vulnerabilities can have significant operational consequences.
The technical implementation of this XSS vulnerability stems from inadequate input validation and output encoding practices within the ZoneMinder web interface. When administrators or users create new monitor entries, the system accepts the name parameter without proper sanitization of potentially malicious script code. This occurs because the application fails to implement proper HTML escaping or content security policies before displaying user-provided data in web contexts. The flaw allows attackers to inject arbitrary JavaScript code or HTML content that executes in the context of other users' browsers who view the affected monitor entries. This type of vulnerability falls under CWE-79 which specifically addresses cross-site scripting vulnerabilities in software applications. The vulnerability is classified as a remote attack vector since malicious input can be submitted through web forms without requiring local access to the system.
The operational impact of this vulnerability extends beyond simple data theft or defacement scenarios. Attackers can leverage this weakness to establish persistent access to monitored environments, potentially capturing credentials, executing unauthorized administrative commands, or redirecting users to malicious sites. In security monitoring contexts, this vulnerability is particularly dangerous because it allows attackers to manipulate the very systems designed to protect against unauthorized access. The attack surface is broad since any user with permission to create monitor entries can potentially exploit this flaw, and the impact is amplified in environments where multiple administrators manage surveillance systems. The vulnerability aligns with ATT&CK technique T1566 which covers spearphishing attacks that often leverage XSS vulnerabilities to establish initial access or maintain persistence within target networks. Organizations relying on ZoneMinder for security monitoring face potential compromise of their entire surveillance infrastructure if this vulnerability remains unpatched.
Mitigation strategies for CVE-2016-10203 require immediate implementation of proper input validation and output encoding mechanisms within the ZoneMinder application. System administrators should upgrade to ZoneMinder version 1.31 or later where this vulnerability has been addressed through proper sanitization of user inputs. Additionally, implementing Content Security Policies (CSP) can provide an additional layer of protection against XSS attacks by restricting script execution in web pages. Network segmentation and privilege separation should be enforced to limit the impact of potential exploitation, ensuring that only authorized personnel have the ability to create monitor entries. Regular security assessments and input validation testing should be implemented to identify similar vulnerabilities in other web applications. The remediation process should also include comprehensive user education regarding the risks of clicking on suspicious links or visiting untrusted websites that may attempt to exploit such vulnerabilities in surveillance systems. Organizations should also consider implementing web application firewalls to detect and block malicious payloads attempting to exploit this and similar vulnerabilities in their security infrastructure.