CVE-2023-42701 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-2023-42701 resides within a firewall service implementation where insufficient permission validation creates an avenue for unauthorized data exposure. This flaw manifests as a missing permission check that allows applications to write permission usage records without proper authorization verification. The vulnerability falls under the category of inadequate permission checks as classified by CWE-284, which specifically addresses improper access control mechanisms that permit unauthorized operations. The absence of proper permission validation creates a path where malicious or legitimate applications can bypass intended security boundaries to access information they should not be able to retrieve.
The technical implementation flaw occurs at the service level where the firewall component fails to validate whether an application has appropriate permissions before allowing it to write to permission usage record storage. This represents a classic access control vulnerability where the system assumes that any application with access to the service can perform all operations without proper authorization verification. The vulnerability operates at the application layer and potentially affects system-level security controls that rely on accurate permission logging for access monitoring. The flaw does not require additional execution privileges to exploit, meaning that any application with basic access to the firewall service can potentially trigger the information disclosure.
The operational impact of this vulnerability extends beyond simple information disclosure as it undermines the fundamental security model of the firewall service. Attackers can leverage this weakness to gather sensitive information about application permissions and usage patterns without requiring elevated privileges or additional attack vectors. This creates a persistent threat where unauthorized applications can accumulate detailed logs of permission usage, potentially exposing system architecture details, user behavior patterns, and application security configurations. The vulnerability essentially weakens the integrity of the permission monitoring system, which is critical for maintaining proper access control and security auditing capabilities.
Mitigation strategies for CVE-2023-42701 should focus on implementing proper access control validation mechanisms within the firewall service. Organizations should enforce mandatory permission checks before allowing any application to write to permission usage records, ensuring that only authorized processes can perform such operations. The implementation should follow principle of least privilege concepts and include proper authentication mechanisms to verify application identities before granting write access to sensitive logging systems. Security controls should also include monitoring for unauthorized permission usage record modifications and implementing proper logging of access attempts to detect potential exploitation attempts. This vulnerability aligns with ATT&CK technique T1562.001 which covers "Modify System Image" and represents a failure in maintaining proper system integrity controls. The remediation process must involve comprehensive code review to identify similar permission validation gaps and implementation of standardized access control frameworks that prevent unauthorized data manipulation.