CVE-2023-42707 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-2023-42707 resides within a firewall service component where insufficient permission validation creates an avenue for unauthorized data exposure. This flaw represents a critical security oversight that allows applications to potentially write permission usage records without proper authorization checks, fundamentally undermining the integrity of the system's access control mechanisms. The vulnerability manifests in scenarios where the firewall service fails to validate whether an application has legitimate authorization to perform specific permission-related operations, creating a pathway for information disclosure that requires no additional execution privileges beyond basic system access.
The technical implementation of this vulnerability stems from a missing permission check within the firewall service's permission handling logic. When applications attempt to write permission usage records, the system should verify that the requesting entity possesses appropriate authorization levels before granting access to sensitive permission data. However, the absence of this validation check means that any application with access to the firewall service interface can potentially write to permission usage records and subsequently access information that should be restricted. This flaw operates at the intersection of improper privilege management and inadequate input validation, creating a persistent security weakness that can be exploited by malicious actors with minimal privileges.
The operational impact of CVE-2023-42707 extends beyond simple information disclosure, as it enables attackers to gather sensitive permission-related data that could be leveraged for further exploitation. An attacker with local access to the system could potentially enumerate permission usage patterns, identify access control configurations, and map out the security landscape of the affected system. This information disclosure capability aligns with attack patterns documented in the ATT&CK framework under the privilege escalation and credential access domains, where adversaries seek to understand system permissions and access controls to plan more sophisticated attacks. The vulnerability's low execution privilege requirement makes it particularly dangerous as it can be exploited by threat actors with minimal initial access, potentially serving as a stepping stone for more extensive compromise.
Mitigation strategies for CVE-2023-42707 should focus on implementing robust permission validation mechanisms within the firewall service. System administrators should ensure that all permission-related operations undergo strict authorization checks before any data access or modification occurs. The implementation should include mandatory permission verification for all permission usage record operations, with proper logging of access attempts to detect anomalous behavior. This vulnerability maps to CWE-284 which describes improper access control, and addresses the need for proper authorization checks in security-critical components. Organizations should also implement principle of least privilege configurations, ensuring that applications only receive the minimum permissions necessary for their operation, thereby reducing the potential impact of such vulnerabilities. Regular security audits and code reviews focused on permission handling logic can help identify similar flaws before they can be exploited in real-world scenarios.