CVE-2023-30865 in SC9863A
Summary
by MITRE • 06/06/2023
In dialer service, there is 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 • 01/08/2025
The vulnerability identified as CVE-2023-30865 resides within the dialer service component of a mobile operating system, specifically exposing a critical missing permission check that enables unauthorized information disclosure. This flaw exists in the service responsible for managing phone dialing operations and related telephony functions, where proper access controls have been omitted or incorrectly implemented. The absence of adequate permission validation allows any local application or process to potentially access sensitive telephony data without requiring elevated privileges or additional malicious execution capabilities. This represents a significant security weakness in the system's privilege model and access control mechanisms.
The technical nature of this vulnerability stems from a failure in the Android operating system's security architecture, where the dialer service does not properly verify whether requesting processes have appropriate permissions before granting access to telephony-related information. This missing permission check creates an attack surface that can be exploited by malicious applications that are already running on the device with standard user privileges. The flaw aligns with CWE-284, which describes improper access control vulnerabilities where systems fail to properly enforce access restrictions. The vulnerability operates at the system level where telephony data such as call logs, contact information, or dialing history could be accessed without proper authorization, potentially exposing sensitive user communication data.
From an operational impact perspective, this vulnerability enables local information disclosure attacks that can compromise user privacy and sensitive communication data. Attackers can exploit this weakness to extract personal information including phone numbers, call records, and potentially other telephony-related data that should remain protected. The lack of additional execution privileges required means that even basic applications can leverage this vulnerability, making it particularly dangerous as it can be exploited by malicious software that is already present on the device. This type of vulnerability directly impacts the principle of least privilege and can lead to data breaches that compromise user confidentiality and potentially enable further attacks.
The security implications extend beyond simple information disclosure to potentially enable more sophisticated attacks that could lead to identity theft, social engineering, or other privacy violations. The vulnerability represents a failure in the Android security model's defense-in-depth approach, where multiple layers of protection should normally prevent unauthorized access to sensitive system components. Mitigation strategies should include implementing proper permission checks within the dialer service, ensuring that all access to telephony data requires appropriate authorization tokens or user consent. Organizations should also consider applying security patches and updates as soon as they become available, while monitoring for suspicious activity that might indicate exploitation attempts. This vulnerability demonstrates the critical importance of maintaining proper access control mechanisms in system services and aligns with ATT&CK technique T1074 which involves data staging through local system information discovery.