CVE-2023-30932 in SC9863A
Summary
by MITRE • 07/12/2023
In telephony 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 • 07/30/2023
The vulnerability identified as CVE-2023-30932 resides within telephony service implementations where a critical missing permission check has been discovered. This flaw exists in the core telephony subsystem that manages voice calls, SMS messaging, and other communication services on mobile devices and telephony platforms. The absence of proper authorization validation creates a significant security gap that allows unauthorized access to sensitive telephony data. The vulnerability specifically affects systems where telephony services operate with elevated privileges but fail to verify whether incoming requests originate from authorized processes or users. This missing validation occurs at the service boundary where telephony functions are exposed to other system components or applications.
The technical implementation flaw stems from inadequate access control mechanisms within the telephony service architecture. When applications or system components attempt to access telephony-related data or functionality, the service should verify proper authorization before granting access. However, in this case, the permission checking logic has been omitted or bypassed entirely, allowing any local process to potentially query or retrieve telephony information. The vulnerability manifests when legitimate telephony service operations are performed without proper authentication verification, creating an attack surface where unauthorized entities can exploit this weakness. This type of flaw commonly occurs in systems where security controls are not properly integrated into service interfaces or where legacy code patterns have been maintained without adequate security review. The absence of proper input validation and access control checks places the entire telephony data ecosystem at risk.
The operational impact of CVE-2023-30932 is substantial as it enables local information disclosure without requiring any additional privileges or execution capabilities from the attacker. This means that any application running with basic user permissions on the device can potentially access sensitive telephony data including call logs, contact information, SMS messages, and potentially device identification details. The information disclosure can lead to privacy violations, data breaches, and potential escalation to more serious security incidents. Attackers can leverage this vulnerability to gather intelligence about user communication patterns, device usage, and personal information without needing to escalate privileges or exploit additional vulnerabilities. The impact extends beyond simple data exposure as this information can be used for social engineering attacks, targeted phishing campaigns, or to build comprehensive profiles of user behavior and communication patterns. This vulnerability directly aligns with CWE-284 which addresses improper access control, and represents a classic example of insufficient authorization checks in service interfaces.
Mitigation strategies for CVE-2023-30932 should focus on implementing robust permission checking mechanisms within telephony service implementations. System administrators and developers must ensure that all telephony service interfaces properly validate access control before granting information access. This includes implementing proper authentication checks, establishing clear authorization policies, and ensuring that service components verify the identity and privileges of requesting processes. The remediation process should involve code reviews to identify all telephony service endpoints that lack proper access control validation, followed by implementation of mandatory permission checks. Additionally, organizations should consider implementing runtime monitoring to detect unauthorized access attempts to telephony services and establish proper logging mechanisms to track access patterns. The solution aligns with ATT&CK technique T1074 which involves data staging through legitimate credentials, and addresses the fundamental security principle of least privilege enforcement. Regular security assessments and penetration testing should be conducted to verify that access control mechanisms are properly implemented and functioning as intended, ensuring that the telephony service maintains appropriate isolation between different application contexts and user sessions.