CVE-2023-4099 in QSige
Summary
by MITRE • 10/25/2023
The QSige Monitor application does not have an access control mechanism to verify whether the user requesting a resource has sufficient permissions to do so. As a prerequisite, it is necessary to log into the application.
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Analysis
by VulDB Data Team • 10/25/2023
The QSige Monitor application presents a critical access control vulnerability that undermines the fundamental security posture of the system. This weakness stems from the absence of proper authorization checks within the application's architecture, creating a scenario where authenticated users can potentially access resources beyond their designated permissions. The vulnerability manifests as a lack of role-based access control mechanisms that should validate user privileges before granting access to specific functionalities or data within the monitoring application. According to CWE-284, this represents an improper access control flaw that allows actors with valid credentials to escalate their privileges or access unauthorized resources. The security model of the application fails to implement mandatory access controls or attribute-based access control mechanisms that would normally prevent such unauthorized access patterns.
The technical implementation of this vulnerability allows attackers who have successfully authenticated to the application to exploit the missing access control checks and potentially gain access to sensitive monitoring data, configuration settings, or administrative functions. This weakness is particularly dangerous because it operates at the application level where users have already passed the initial authentication barrier, making it easier for threat actors to escalate their privileges without additional authentication challenges. The vulnerability creates a path for privilege escalation attacks where a regular user might access resources typically restricted to administrators or specialized monitoring personnel. This flaw aligns with ATT&CK technique T1078 which describes legitimate credentials being used to gain access to systems, but in this case the access is unauthorized due to the missing access control verification. The application's architecture appears to rely solely on authentication without implementing authorization matrices that would normally define what authenticated users can and cannot access.
The operational impact of this vulnerability extends beyond simple unauthorized access, potentially enabling data exfiltration, system compromise, or disruption of monitoring operations. An attacker could access sensitive operational data, view system configurations, or manipulate monitoring parameters that could affect the integrity of the entire monitoring infrastructure. The absence of access control verification means that users with minimal privileges might gain access to critical system functions, creating opportunities for both insider threats and external exploitation. Organizations relying on QSige Monitor for security monitoring could experience significant operational disruptions if attackers exploit this vulnerability to access or modify critical monitoring data. The vulnerability's impact is further amplified by the fact that it affects the application's core security model, potentially undermining the trust placed in the monitoring system's ability to provide accurate and secure operational visibility.
Mitigation strategies for this vulnerability should focus on implementing comprehensive access control mechanisms within the QSige Monitor application. Organizations should deploy role-based access control systems that define granular permissions for different user roles and ensure that all resource requests are validated against the user's assigned privileges. The application should implement a robust authorization framework that checks user permissions before granting access to any resource, including administrative functions, monitoring data, and configuration settings. Security patches should be applied to address the missing access control checks, and organizations should consider implementing additional security controls such as audit logging to track access attempts and potential unauthorized access events. Regular security assessments should be conducted to verify that access control mechanisms are properly implemented and functioning as intended. The solution must align with security standards such as NIST SP 800-53 and ISO 27001 which emphasize the importance of access control and authorization mechanisms in maintaining system security. Organizations should also consider implementing multi-factor authentication and session management controls to further strengthen the security posture of the monitoring application.