CVE-2018-18005 in Network Camera
Summary
by MITRE
Cross-site scripting in event_script.js in VIVOTEK Network Camera Series products with firmware 0x06x to 0x08x allows remote attackers to execute arbitrary JavaScript via a URL query string parameter.
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Analysis
by VulDB Data Team • 04/26/2020
The vulnerability identified as CVE-2018-18005 represents a critical cross-site scripting flaw within VIVOTEK network camera series devices, specifically affecting firmware versions ranging from 0x06x to 0x08x. This security weakness resides in the event_script.js component of the camera's web interface, creating a significant attack surface that enables remote threat actors to inject malicious JavaScript code through carefully crafted URL query string parameters. The affected devices operate under a web-based management interface that fails to properly sanitize user input, allowing attackers to exploit this vulnerability without requiring authentication or physical access to the device. The flaw manifests when the camera processes URL parameters containing malicious script content, which then gets executed within the context of a victim's browser session, potentially compromising the integrity of the web interface and the security of connected users.
The technical implementation of this vulnerability aligns with CWE-79, which defines cross-site scripting as a code injection attack where malicious scripts are injected into trusted websites. The attack vector specifically targets the event_script.js file, which handles event-related functionality within the camera's web interface. When a user visits a maliciously crafted URL containing JavaScript code within the query string parameters, the camera's web server fails to validate or sanitize the input before rendering it in the browser context. This lack of input validation creates a persistent XSS vulnerability that allows attackers to execute arbitrary JavaScript code in the victim's browser, potentially enabling session hijacking, credential theft, or redirection to malicious websites. The vulnerability is particularly concerning because it operates at the web application layer, where the camera's firmware serves web content directly to users without proper security headers or input sanitization mechanisms.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable sophisticated attack chains that compromise the overall security posture of network camera deployments. Remote attackers can leverage this vulnerability to establish persistent access to the camera's web interface, potentially leading to unauthorized surveillance access, modification of camera settings, or data exfiltration from the network. The attack requires no specialized tools beyond basic web browsing capabilities, making it accessible to threat actors with minimal technical expertise. When multiple cameras are deployed within a network infrastructure, this vulnerability can serve as a foothold for broader network infiltration, as attackers can use the compromised camera as a pivot point to target other networked devices. The vulnerability also affects the trust model of the camera ecosystem, as users who access the camera's web interface may unknowingly execute malicious code that can persist across browser sessions.
Mitigation strategies for CVE-2018-18005 should prioritize immediate firmware updates from VIVOTEK, as the vendor has likely released patches addressing this specific vulnerability. Organizations should implement network segmentation to isolate camera deployments from critical network segments, reducing the potential impact of exploitation. Web application firewalls and content filtering solutions can provide additional protection layers by monitoring and filtering malicious query parameters before they reach the camera's web interface. Security teams should conduct comprehensive vulnerability assessments to identify all affected camera models and firmware versions within their infrastructure, ensuring that all devices are updated to patched versions. Network monitoring solutions should be configured to detect anomalous traffic patterns that might indicate exploitation attempts, particularly focusing on unusual URL query parameters containing JavaScript code. The implementation of proper input validation and output encoding mechanisms within the web application layer provides defense-in-depth against similar vulnerabilities, while regular security audits and penetration testing can help identify other potential XSS vulnerabilities in networked devices. Organizations should also consider implementing browser security policies that restrict script execution and enforce security headers to minimize the impact of potential XSS exploitation attempts.