CVE-2023-42711 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-2023-42711 resides within a firewall service component where insufficient permission validation creates an unintended pathway for unauthorized data access. This flaw represents a critical security oversight that undermines the fundamental principle of least privilege enforcement typically expected from system services. The vulnerability manifests when the firewall service attempts to write permission usage records for applications without verifying whether the requesting process possesses adequate authorization levels. This missing permission check creates a condition where any local process can potentially access and disclose information about application permissions, effectively bypassing the intended security boundaries.
The technical nature of this vulnerability aligns with CWE-284, which describes improper access control mechanisms that allow unauthorized entities to access system resources. The flaw operates at the service level where permission auditing functionality becomes compromised due to inadequate validation of caller credentials. When an application or process requests permission usage record creation, the firewall service fails to validate whether the requesting entity has legitimate authorization to perform such operations. This oversight creates a privilege escalation vector where local processes can access sensitive information about application permissions without requiring additional execution privileges, making the vulnerability particularly dangerous in multi-user environments.
The operational impact of CVE-2023-42711 extends beyond simple information disclosure to potentially enable more sophisticated attacks. An attacker with local access could leverage this vulnerability to gather detailed information about application permissions, user privileges, and system access controls. This intelligence gathering capability could facilitate further exploitation attempts, including privilege escalation or targeted attacks against specific applications. The vulnerability's low barrier to exploitation means that even minimal local access could yield significant information disclosure, making it attractive to threat actors seeking to understand system configurations and access patterns. From an attack chain perspective, this vulnerability maps to ATT&CK technique T1068, which involves exploiting local privileges to gain elevated access, and T1083, which focuses on discovering system information through local enumeration techniques.
Mitigation strategies for this vulnerability should focus on implementing robust permission validation mechanisms within the firewall service. System administrators should ensure that all permission-related operations require explicit authentication and authorization checks before proceeding with record creation or modification. The service should enforce mandatory access controls that validate process credentials against established security policies before allowing any permission usage record operations. Additionally, regular security audits should verify that all system services properly implement permission validation and that access control mechanisms function as intended. Organizations should also consider implementing monitoring solutions that can detect unauthorized attempts to access permission records, providing early warning capabilities for potential exploitation attempts. The vulnerability demonstrates the critical importance of maintaining proper access control boundaries even within trusted system components, as the failure to validate permissions can result in significant information disclosure risks that compromise overall system security posture.