CVE-2023-42645 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 information disclosure with no additional execution privileges needed
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 11/29/2023
The vulnerability identified as CVE-2023-42645 resides within the sim service component of a mobile operating system, specifically affecting permission handling mechanisms that govern how application usage records are written and managed. This issue represents a critical flaw in the system's access control framework where the sim service fails to properly validate whether an application has the necessary permissions before allowing it to write usage records. The vulnerability stems from a missing permission check that should have been enforced during the execution of the sim service operations, creating an exploitable gap in the security model that governs application behavior and data handling within the operating system environment.
The technical implementation of this vulnerability manifests as a lack of proper authorization validation within the sim service's permission handling subsystem. When an application attempts to write usage records through the sim service interface, the system should verify that the requesting application possesses the appropriate privileges to perform such operations. However, due to the missing permission check, any application can potentially write to the usage record storage without proper authorization, effectively bypassing the intended security boundaries that protect sensitive usage data from unauthorized access or modification. This flaw operates at the kernel or system service level where permission enforcement should be strictly enforced, making it particularly dangerous as it can be exploited by malicious applications without requiring additional privileges or root access.
The operational impact of CVE-2023-42645 extends beyond simple information disclosure, as it creates a persistent vulnerability that allows unauthorized applications to manipulate or access usage data that should remain protected. This vulnerability can be exploited to gather detailed information about other applications installed on the device, including their usage patterns, frequency of execution, and potentially sensitive behavioral data that could be used for targeted attacks or privacy violations. The lack of additional execution privileges required for exploitation means that even standard applications with basic permissions can leverage this vulnerability to gain unauthorized access to information that normally would be restricted to system-level processes or applications with elevated privileges. This creates a significant risk for user privacy and device security, as the vulnerability can be exploited silently without detection by the user or security monitoring systems.
Mitigation strategies for this vulnerability should focus on implementing proper permission validation within the sim service component, ensuring that all operations requiring access to usage records enforce strict authorization checks before allowing data modification. System administrators and device manufacturers should implement immediate patches that restore the missing permission validation logic and conduct thorough security reviews of similar permission handling mechanisms throughout the operating system. The vulnerability aligns with CWE-284 which specifically addresses improper access control and represents a classic example of insufficient privilege checking in system services. From an ATT&CK perspective, this vulnerability maps to privilege escalation techniques and can be leveraged to achieve persistent information gathering capabilities, potentially enabling more sophisticated attacks that exploit the collected usage data for targeted exploitation or further system compromise. Organizations should also implement monitoring mechanisms to detect unauthorized usage record modifications and establish regular security audits to identify similar permission bypass vulnerabilities in other system components.