CVE-2023-42703 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-2023-42703 resides within a firewall service component where insufficient permission validation allows unauthorized applications to write permission usage records. This flaw represents a critical security oversight in the system's access control mechanisms, as it enables malicious or benign applications to potentially log permission activities without proper authorization. The vulnerability stems from the absence of adequate permission checks during the recording process of application permission usage, creating an unintended pathway for information disclosure.
This technical weakness manifests as a failure in the principle of least privilege enforcement, where the firewall service does not properly validate whether an application has legitimate authorization to write permission usage logs. The vulnerability is classified under CWE-284, which addresses improper access control issues, specifically focusing on inadequate permission validation during system operations. The flaw operates at the system level where application behavior monitoring and logging mechanisms are improperly secured, allowing any application to potentially record permission usage data that should be restricted to authorized system components.
The operational impact of this vulnerability extends beyond simple information disclosure, as it creates potential attack vectors for adversaries seeking to gather sensitive system information. An attacker could leverage this weakness to monitor and log permission usage patterns of other applications, potentially identifying system configurations, user behaviors, and application dependencies. This information could then be used to craft more sophisticated attacks or to understand system architecture for further exploitation. The vulnerability is particularly concerning because it requires no additional execution privileges, making it easily exploitable by any local application with basic system access.
From a threat modeling perspective, this vulnerability aligns with ATT&CK technique T1083, which covers directory and file system discovery activities. The flaw enables unauthorized data collection that could support broader reconnaissance efforts. Mitigation strategies should focus on implementing robust permission validation mechanisms before any permission usage records are written to system logs. The recommended approach involves enforcing strict access controls during the logging process, ensuring that only authorized system components can write to permission usage databases. Additionally, implementing proper audit trails and monitoring for unauthorized logging activities would provide early detection of potential exploitation attempts. System administrators should also consider applying the principle of least privilege to firewall service components and regularly review permission configurations to prevent unauthorized access to sensitive logging mechanisms.