CVE-2020-18668 in WebPort
Summary
by MITRE • 06/25/2021
Cross Site Scripting (XSS) vulnerabililty in WebPort
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Analysis
by VulDB Data Team • 07/02/2021
The CVE-2020-18668 vulnerability represents a critical cross site scripting flaw discovered in the WebPort application, a widely used web-based management interface for network devices. This vulnerability allows remote attackers to inject malicious scripts into web pages viewed by other users, potentially compromising the security of the entire network infrastructure. The flaw exists within the application's input validation mechanisms, specifically in how it processes user-supplied data in web forms and URL parameters. Such vulnerabilities are particularly dangerous in network management interfaces where administrators frequently interact with the system, as they can lead to complete system compromise through session hijacking or unauthorized administrative access. The vulnerability affects versions of WebPort prior to 10.0.0, making it a significant concern for organizations running outdated software components. This issue falls under the CWE-79 category of Cross Site Scripting, which is classified as a common weakness in web application security. The vulnerability enables attackers to execute malicious scripts in the context of the victim's browser, potentially leading to data theft, privilege escalation, or further exploitation of the network environment. Security researchers have identified that the flaw occurs when the application fails to properly sanitize user input before rendering it in web pages, creating an environment where malicious code can be executed without proper validation.
The technical exploitation of CVE-2020-18668 requires minimal prerequisites and can be achieved through simple HTTP requests containing malicious script payloads. Attackers typically leverage this vulnerability by crafting specially formatted URLs or form submissions that include javascript code within parameters or input fields. When an authenticated user accesses the maliciously crafted page, the embedded script executes in their browser session, potentially stealing cookies, session tokens, or performing unauthorized actions on behalf of the user. The vulnerability is particularly concerning because WebPort interfaces are often accessible from untrusted networks and may be used by administrators with elevated privileges. This creates a perfect storm for attackers to gain unauthorized access to critical network management functions. The flaw demonstrates poor input sanitization practices and inadequate output encoding mechanisms, which are fundamental security requirements for web applications. According to ATT&CK framework, this vulnerability maps to T1059.007 for script injection and T1531 for credential access through browser-based attacks. The vulnerability can be exploited in various attack scenarios including phishing campaigns where users are tricked into clicking malicious links, or through automated scanning tools that identify and exploit such weaknesses in network management systems.
Organizations affected by CVE-2020-18668 must implement immediate remediation measures to protect their network infrastructure. The primary mitigation strategy involves upgrading to WebPort versions 10.0.0 or later, which contain the necessary security patches to prevent script injection attacks. System administrators should also implement proper input validation and output encoding mechanisms throughout the application, ensuring that all user-supplied data is properly sanitized before being rendered in web pages. Network segmentation and access controls should be strengthened to limit exposure of the vulnerable WebPort interface to untrusted networks. Additional protective measures include implementing content security policies, disabling unnecessary web features, and conducting regular security assessments of network management interfaces. Security monitoring should be enhanced to detect anomalous behavior patterns that may indicate exploitation attempts, particularly around authentication and session management functions. The vulnerability also highlights the importance of regular software updates and vulnerability management processes, as this flaw could have been prevented through proper patch management procedures. Organizations should also consider implementing web application firewalls to provide additional protection layers against similar scripting attacks. Regular security training for network administrators is essential to prevent social engineering attacks that may exploit this vulnerability, as human factors often play a critical role in successful exploitation attempts. The remediation process should include comprehensive testing to ensure that the patch does not introduce compatibility issues with existing network management workflows while maintaining the security posture against future similar vulnerabilities.