CVE-2018-15820 in 30P
Summary
by MITRE
EasyIO EasyIO-30P devices before 2.0.5.27 allow XSS via the dev.htm GDN parameter.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 06/26/2024
The CVE-2018-15820 vulnerability represents a cross-site scripting flaw in EasyIO EasyIO-30P network devices running firmware versions prior to 2.0.5.27. This vulnerability specifically affects the device management interface accessible through the dev.htm web page where the GDN parameter is processed without adequate input validation or output sanitization. The affected devices are commonly used in industrial environments for network monitoring and control applications, making this vulnerability particularly concerning for operational technology infrastructure. The vulnerability resides in the web server component of the device that handles HTTP requests and responses, creating a potential attack vector for malicious actors to exploit.
The technical implementation of this XSS vulnerability occurs when the GDN parameter in the dev.htm URL is not properly sanitized before being rendered in the web interface. This allows an attacker to inject malicious JavaScript code that executes in the context of a victim's browser session. The flaw can be exploited through various means including crafted URLs sent via email phishing campaigns, malicious websites, or through compromised network traffic. When a user visits a maliciously crafted URL containing the XSS payload, the injected script executes in the victim's browser, potentially allowing for session hijacking, data theft, or further exploitation of the device. This vulnerability falls under CWE-79 which specifically addresses cross-site scripting flaws in web applications.
The operational impact of this vulnerability extends beyond simple script execution as it can enable attackers to gain unauthorized access to device management functions, potentially leading to complete device compromise. In industrial control environments, this could result in unauthorized modification of network configurations, data manipulation, or disruption of critical operations. The vulnerability affects devices that may be deployed in sensitive infrastructure environments where security is paramount, such as manufacturing facilities, power grid monitoring systems, or water treatment plants. Attackers could leverage this vulnerability to establish persistent access points within the network, making it particularly dangerous for organizations with limited security monitoring capabilities.
Mitigation strategies for CVE-2018-15820 primarily focus on firmware updates to version 2.0.5.27 or later, which contain proper input validation and output sanitization mechanisms. Network administrators should implement strict access controls and limit administrative access to these devices to trusted personnel only. Additionally, deploying web application firewalls and implementing proper network segmentation can help reduce the attack surface. The vulnerability aligns with ATT&CK technique T1566 which covers social engineering attacks that may leverage XSS vulnerabilities to gain initial access to systems. Organizations should also implement regular security assessments of their industrial control systems and maintain updated vulnerability management processes to address similar issues in other networked devices. The remediation process should include thorough testing of the updated firmware in controlled environments before deployment to production systems.