CVE-2023-33892 in SC9863A
Summary
by MITRE • 07/12/2023
In fastDial service, there is a missing permission check. This could lead to local information disclosure with no additional execution privileges needed.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 08/02/2023
The vulnerability identified as CVE-2023-33892 resides within the fastDial service component where a critical missing permission check has been discovered. This flaw represents a significant security weakness that allows unauthorized local access to sensitive information without requiring any additional execution privileges or elevated permissions. The fastDial service typically operates as a system-level component responsible for handling dialing operations and may interface with various system resources that contain confidential data.
The technical nature of this vulnerability stems from inadequate authorization controls within the service implementation. When a permission check is missing, the system fails to validate whether the requesting entity has appropriate access rights before granting information disclosure. This missing validation creates an attack surface where any local user or process can potentially access data that should be restricted to authorized entities only. The vulnerability operates at the authorization level and directly relates to CWE-284 which describes improper access control scenarios. The absence of proper permission validation means that the service does not properly enforce the principle of least privilege, allowing for unauthorized information disclosure.
From an operational impact perspective, this vulnerability enables local information disclosure attacks that can result in exposure of sensitive system data, configuration details, or user-related information. The lack of additional execution privileges required makes this vulnerability particularly concerning as it can be exploited by any local user without needing to escalate their privileges first. Attackers could potentially access system logs, configuration files, communication data, or other confidential information that the fastDial service is designed to protect. The vulnerability essentially creates a backdoor for information leakage that bypasses normal security controls and represents a classic example of a privilege escalation vector that operates at the local level.
The mitigation strategy for CVE-2023-33892 should focus on implementing proper permission checks within the fastDial service. Security patches should be applied to ensure that all access requests are properly validated against appropriate authorization policies. System administrators should review and enforce proper access controls, ensuring that the service operates with minimal required privileges and that all data access is properly authenticated and authorized. The fix should align with ATT&CK technique T1078 which covers valid accounts and privilege escalation, as this vulnerability essentially allows unauthorized access through improperly enforced permissions. Organizations should also consider implementing additional monitoring to detect unauthorized access attempts to the fastDial service and related system components. Regular security assessments should be conducted to identify similar missing permission checks in other system services and components to prevent similar vulnerabilities from being present in the broader system architecture.