CVE-2018-14890 in Cognito Brain
Summary
by MITRE
Vectra Networks Cognito Brain and Sensor before 4.2 contains a cross-site scripting (XSS) vulnerability in the Web Management Console.
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Analysis
by VulDB Data Team • 03/26/2020
The vulnerability identified as CVE-2018-14890 affects Vectra Networks Cognito Brain and Sensor systems prior to version 4.2, representing a critical cross-site scripting weakness within the web management console interface. This vulnerability exposes organizations to potential exploitation through malicious web content injection attacks that can compromise user sessions and system integrity. The affected components operate as network security monitoring solutions that provide threat detection and response capabilities, making this vulnerability particularly concerning for security operations centers that rely on these platforms for network defense.
The technical flaw manifests as a failure in proper input validation and output encoding within the web management console's user interface components. Attackers can craft malicious payloads that get executed when legitimate users interact with the affected web application, typically through crafted URLs or form submissions containing malicious script content. This vulnerability falls under CWE-79 which specifically addresses cross-site scripting flaws, where the application fails to sanitize user-supplied data before incorporating it into dynamically generated web pages. The vulnerability enables attackers to execute arbitrary JavaScript code within the context of the victim's browser session, potentially leading to session hijacking, data theft, or further exploitation of the compromised system.
The operational impact of this vulnerability extends beyond simple script execution as it can enable attackers to bypass security controls and escalate privileges within the network monitoring environment. Organizations using Vectra Cognito systems face significant risk of unauthorized access to sensitive security monitoring data, potential disruption of threat detection capabilities, and possible lateral movement within their network infrastructure. The web management console serves as the primary interface for security administrators to configure and monitor the system, making successful exploitation particularly damaging as it could allow attackers to modify detection rules, disable security features, or access confidential network data. This vulnerability directly impacts the CIA triad by potentially compromising confidentiality through data exfiltration, integrity through configuration tampering, and availability through service disruption.
Mitigation strategies for CVE-2018-14890 primarily focus on immediate patch deployment to upgrade affected Vectra Cognito systems to version 4.2 or later, which includes proper input validation and output encoding fixes. Organizations should also implement network segmentation to limit access to the web management console to authorized administrative personnel only, employ web application firewalls to filter malicious traffic, and conduct regular security assessments of web interfaces. Additional protective measures include implementing strict access controls, monitoring for suspicious user activities, and maintaining comprehensive network traffic monitoring to detect potential exploitation attempts. The vulnerability demonstrates the importance of secure coding practices and input validation in web applications, aligning with ATT&CK technique T1059.007 for command and scripting interpreter and T1566.001 for spearphishing attachments, as attackers may leverage this vulnerability as an initial access vector or for privilege escalation within compromised environments.