CVE-2023-42714 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-2023-42714 resides within a firewall service implementation where insufficient permission validation creates an avenue for unauthorized data disclosure. This flaw specifically affects the recording mechanism for application permission usage, where the system fails to properly verify whether an application has legitimate authorization to write permission usage records. The missing permission check represents a critical breakdown in the security model that governs how applications interact with system-level services.
From a technical perspective, this vulnerability manifests as a lack of proper access control enforcement within the firewall service's permission logging subsystem. The system should validate that only authorized applications or processes can write to permission usage records, yet this validation is absent or improperly implemented. The flaw allows any local application to potentially write to these records without proper authorization, creating a pathway for information disclosure. This type of vulnerability aligns with CWE-284 which addresses improper access control and CWE-250 which covers execution with unnecessary privileges.
The operational impact of this vulnerability extends beyond simple information disclosure, as it creates a potential attack surface where malicious applications could manipulate permission usage data to hide their activities or create false logs. Attackers could exploit this weakness to gain insights into system behavior, identify legitimate applications, or potentially use the disclosed information for further exploitation. The vulnerability is particularly concerning because it requires no additional execution privileges beyond normal application execution, making it accessible to any locally running process. This characteristic places it within the ATT&CK framework under T1059 for command and scripting interpreter and T1070 for indicator removal, as attackers could use the information disclosed to refine their attacks or cover their tracks.
The security implications of this flaw demonstrate a fundamental weakness in the principle of least privilege enforcement within the firewall service. Applications should only be permitted to interact with system resources in ways that are explicitly authorized, yet this vulnerability allows for unauthorized write operations to permission usage records. The lack of proper permission validation creates a situation where the system's audit trail could be compromised, potentially affecting the integrity of security monitoring and incident response capabilities. Organizations relying on this firewall service for network security may find their threat detection mechanisms compromised if attackers can manipulate the permission usage data.
Mitigation strategies should focus on implementing robust access control checks within the firewall service's permission logging mechanism. The system must enforce proper authorization validation before allowing any application to write permission usage records. This includes implementing mandatory access controls, validating application identities, and ensuring that only authorized processes can perform write operations to sensitive system records. Additionally, the implementation should include proper logging of all access attempts to permission usage records, enabling administrators to detect and respond to unauthorized access attempts. The fix should be implemented according to security best practices that align with standards such as NIST SP 800-53 and ISO 27001, ensuring that the solution maintains the confidentiality, integrity, and availability of the permission logging functionality while preserving legitimate system operations.