CVE-2018-10369 in Win 240
Summary
by MITRE
A Cross-site scripting (XSS) vulnerability was discovered on Intelbras Win 240 V1.1.0 devices. An attacker can change the Admin Password without a Login.
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Analysis
by VulDB Data Team • 03/16/2020
The CVE-2018-10369 vulnerability represents a critical cross-site scripting flaw affecting Intelbras Win 240 V1.1.0 network devices that operates under the CWE-79 category for cross-site scripting. This vulnerability enables malicious actors to manipulate the device's administrative interface through a sophisticated attack vector that bypasses normal authentication mechanisms. The flaw specifically resides in how the device handles user input within its web-based management interface, creating an exploitable condition where crafted malicious payloads can be executed in the context of an authenticated administrator session.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding within the device's web server component. When administrators interact with the device's management portal, improperly sanitized parameters allow attackers to inject malicious javascript code that executes in the browser of any user who visits the affected pages. This particular weakness creates a persistent threat where attackers can manipulate device configurations, including changing administrative passwords, without possessing legitimate credentials. The vulnerability's classification as a persistent XSS flaw means that the malicious script remains active within the device's interface until manually removed or the session expires, providing attackers with extended access windows.
The operational impact of this vulnerability extends beyond simple password manipulation to encompass complete administrative control of the affected network infrastructure. Attackers who successfully exploit this weakness can establish persistent backdoors within the device's configuration, potentially compromising the entire network segment that relies on the device for connectivity or security functions. The vulnerability's ability to circumvent authentication mechanisms aligns with ATT&CK technique T1078.004 for valid accounts and represents a significant threat to network integrity and availability. Organizations utilizing Intelbras Win 240 devices in production environments face severe risks including data exfiltration, network disruption, and unauthorized access to sensitive network resources.
Mitigation strategies for CVE-2018-10369 should prioritize immediate firmware updates from Intelbras to address the underlying XSS implementation flaws. Network administrators must implement robust input validation measures including regular security audits of device web interfaces and deployment of web application firewalls to detect and prevent malicious payload injection attempts. The vulnerability's exploitation potential necessitates network segmentation and restricted access controls to limit the blast radius of successful attacks. Additionally, security monitoring should include detection of anomalous administrative activity patterns and regular vulnerability scanning to identify similar weaknesses across the network infrastructure. Organizations should also consider implementing multi-factor authentication mechanisms and regular credential rotation as additional defensive measures against persistent threats exploiting this class of vulnerability.