CVE-2023-42655 in T760
Summary
by MITRE • 11/01/2023
In sim 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 escalation of privilege with System execution privileges needed
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Analysis
by VulDB Data Team • 09/05/2024
The vulnerability identified as CVE-2023-42655 resides within the system service component of a mobile operating system environment where improper permission validation creates a pathway for unauthorized privilege escalation. This flaw specifically affects the simulation service functionality that manages how applications interact with system resources and user data. The core issue manifests when the system fails to properly validate whether an application has adequate permissions before allowing it to write permission usage records, creating a potential attack vector for malicious actors seeking elevated system privileges.
The technical implementation of this vulnerability stems from a missing permission check mechanism within the system service layer that governs how permission usage data is logged and maintained. When an application attempts to write permission usage records, the system should verify that the requesting entity possesses the necessary authorization levels to perform such operations. However, due to the absence of this validation step, any application with basic execution privileges can potentially write to permission usage records, effectively bypassing the normal access control mechanisms that should restrict such operations. This design flaw allows for the manipulation of system-level permission logs that could be leveraged to gain deeper system access.
The operational impact of this vulnerability extends beyond simple permission record manipulation, as it provides a potential pathway for local privilege escalation to system-level execution privileges. Attackers can exploit this weakness by crafting malicious applications that leverage the missing permission check to write unauthorized permission usage records, which could then be used to manipulate system behavior or gain elevated privileges within the operating environment. The vulnerability requires only system execution privileges to exploit, making it particularly dangerous as it can be triggered by applications that have already gained some level of system access through other means.
From a cybersecurity perspective, this vulnerability aligns with CWE-284, which addresses improper access control mechanisms, and represents a classic example of privilege escalation through insufficient input validation. The ATT&CK framework categorizes this under privilege escalation techniques where adversaries leverage system-level weaknesses to gain elevated permissions. The vulnerability's impact is amplified by the fact that it operates at the system service level, meaning that successful exploitation could potentially allow attackers to modify system behavior, access sensitive data, or establish persistent access to the device. Organizations should prioritize immediate remediation of this vulnerability through proper permission validation implementation and system updates to prevent potential exploitation by malicious actors seeking to elevate their privileges within the affected platforms.
The remediation approach for CVE-2023-42655 requires implementation of proper permission validation checks within the system service layer before allowing any application to write permission usage records. This involves ensuring that all permission-related operations undergo strict authorization verification processes that confirm the requesting entity has appropriate privileges before permitting the operation. System administrators should also implement monitoring solutions to detect anomalous permission usage record modifications and establish robust patch management procedures to ensure timely deployment of security updates. The vulnerability demonstrates the critical importance of maintaining proper access controls and input validation mechanisms within system services to prevent unauthorized privilege escalation attacks that could compromise entire operating environments.