CVE-2023-42710 in SC7731E
Summary
by MITRE • 12/04/2023
In firewall service, there is a possible way to write permission usage records of an app due to a missing permission check. This could lead to local information disclosure with no additional execution privileges needed
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Analysis
by VulDB Data Team • 12/22/2023
The vulnerability identified as CVE-2023-42710 resides within a firewall service implementation where insufficient permission validation creates an exploitable condition for unauthorized data access. This flaw represents a critical security oversight that allows malicious applications to bypass normal access controls and write permission usage records without proper authorization. The vulnerability specifically impacts the permission management subsystem of the firewall service, where the absence of adequate validation mechanisms enables arbitrary applications to manipulate permission logging data.
From a technical perspective, the flaw manifests as a missing permission check during the write operation of permission usage records within the firewall service. This missing validation occurs at the application programming interface level where the service fails to verify whether the requesting application possesses the necessary privileges to perform the specific write operation. The vulnerability is classified as a permission escalation issue that operates at the system level, where the firewall service processes requests without proper authentication or authorization verification. This type of flaw typically falls under CWE-284 which describes improper access control, specifically inadequate access control mechanisms that allow unauthorized access to system resources.
The operational impact of this vulnerability extends beyond simple information disclosure, as it creates a persistent backdoor for unauthorized data collection and monitoring. Attackers can leverage this weakness to gain insights into other applications' permission usage patterns, potentially identifying sensitive access relationships within the system. The vulnerability requires no additional execution privileges to exploit, making it particularly dangerous as it can be leveraged by any application with basic system access. This characteristic aligns with ATT&CK technique T1068 which describes local privilege escalation through improper access control mechanisms, and T1070 which covers indicator removal and data manipulation through system-level access.
The implications of this vulnerability are significant for system security posture, as it undermines the fundamental principle of least privilege that should govern all system operations. Once exploited, the vulnerability allows attackers to manipulate permission usage records which could be used to mask malicious activities or to gather intelligence about other applications' access patterns. The firewall service, which should act as a security boundary, becomes compromised and loses its ability to properly enforce access controls. This creates a scenario where attackers can both read and write permission data, effectively bypassing the security controls that the firewall service is designed to maintain.
Mitigation strategies for CVE-2023-42710 should focus on implementing proper access control validation at the service level. The firewall service must be updated to include comprehensive permission checks before allowing any write operations to permission usage records. This involves implementing role-based access control mechanisms that verify application privileges before permitting data modifications. Security patches should enforce strict authorization protocols that validate both the identity of the requesting application and its entitlements to perform specific operations. Additionally, system administrators should conduct comprehensive audits of all permission management operations to identify any potential exploitation that may have already occurred. The remediation process should also include monitoring for unauthorized access attempts and implementing logging mechanisms that track all permission-related activities to detect suspicious behavior patterns.