CVE-2023-42712 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-2023-42712 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, specifically affecting how the firewall service handles permission checks for record writing operations. The vulnerability stems from the absence of proper authorization validation before permitting applications to log permission usage data, creating an exploitable condition that undermines the integrity of the system's security logging infrastructure. This issue falls under the category of insufficient authorization checks as classified by CWE-862, which directly relates to the failure to properly verify that entities have appropriate access rights before performing sensitive operations.
The technical implementation of this vulnerability enables any locally running application to bypass normal permission boundaries and write to the firewall's permission usage record system without requiring elevated privileges or additional malicious execution capabilities. This represents a privilege escalation vector where standard user applications can potentially access and modify sensitive security audit data, leading to information disclosure through the unauthorized recording of permission usage patterns. The flaw operates at the service level where the firewall component fails to validate whether the requesting application possesses the necessary permissions to perform write operations on the permission usage logs, effectively creating a backdoor for data manipulation.
The operational impact of CVE-2023-42712 extends beyond simple information disclosure, as it compromises the integrity of security audit trails that are crucial for monitoring and detecting unauthorized access attempts. Attackers can exploit this vulnerability to establish persistent logging of their activities within the system, potentially masking malicious behavior while creating false positive alerts for legitimate security monitoring. This vulnerability aligns with ATT&CK technique T1070.004, which involves the manipulation of security logs to evade detection. The lack of additional execution privileges required for exploitation makes this vulnerability particularly dangerous as it can be leveraged by any local application without requiring complex attack chains or privilege escalation techniques.
Mitigation strategies for this vulnerability should focus on implementing robust permission validation mechanisms within the firewall service, ensuring that all write operations to permission usage records require proper authorization checks before execution. Organizations should enforce mandatory access controls and implement proper privilege separation between applications and security logging components. The fix should include comprehensive input validation and authorization verification before any permission usage record writing operations occur, aligning with security best practices outlined in NIST SP 800-53 and ISO/IEC 27001 standards. Additionally, regular security auditing of service components should be conducted to identify similar permission validation gaps that could lead to similar vulnerabilities in the system's overall security posture.