CVE-2018-14889 in Cognito Brain
Summary
by MITRE
CouchDB in Vectra Networks Cognito Brain and Sensor before 4.3 contains a local code execution vulnerability.
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Analysis
by VulDB Data Team • 03/26/2020
CVE-2018-14889 represents a critical local code execution vulnerability affecting CouchDB implementations within Vectra Networks Cognito Brain and Sensor appliances prior to version 4.3. This vulnerability stems from improper input validation and insufficient access controls within the CouchDB database component that powers the Vectra platform's data storage and processing capabilities. The flaw allows attackers with local access to execute arbitrary code on the affected systems, potentially leading to complete system compromise and unauthorized data access.
The technical exploitation of this vulnerability occurs through the manipulation of CouchDB's REST API endpoints, where insufficient sanitization of user-supplied input enables attackers to inject malicious commands that are subsequently executed with elevated privileges. This type of vulnerability falls under CWE-74, which describes "Improper Neutralization of Special Elements in Output Used by a Downstream Component," specifically manifesting in the context of database interactions where user input directly influences database operations. The vulnerability exists due to inadequate validation of parameters passed to CouchDB's administrative functions, allowing for command injection attacks that bypass normal access controls.
From an operational impact perspective, this vulnerability poses significant risks to organizations utilizing Vectra Networks solutions for network security monitoring and threat detection. The local code execution capability means that any attacker who gains access to the appliance's local system can escalate privileges and potentially access sensitive network data, including threat intelligence, sensor configurations, and collected network traffic information. This represents a severe compromise of the security infrastructure, as the affected appliances serve as critical components in detecting and responding to network threats. The vulnerability also aligns with ATT&CK technique T1059, "Command and Scripting Interpreter," where adversaries use legitimate system tools to execute malicious code, and T1068, "Exploitation for Privilege Escalation," which describes how attackers leverage vulnerabilities to gain higher-level permissions.
Organizations should immediately implement mitigations including updating to Vectra Networks Cognito Brain and Sensor version 4.3 or later, which includes patches addressing the CouchDB input validation issues. Network segmentation should be enforced to limit local access to these critical appliances, and privileged access should be restricted through proper authentication mechanisms. Security monitoring should be enhanced to detect unusual command execution patterns and unauthorized access attempts to the appliance's administrative interfaces. The vulnerability demonstrates the importance of maintaining up-to-date security patches for database components within security appliances, as these systems often contain sensitive operational data and serve as attack vectors for more extensive network compromises. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other database components and ensure comprehensive protection of the organization's security infrastructure.