CVE-2023-30927 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-2023-30927 represents a critical security flaw within telephony service implementations where a missing permission check has been discovered. This weakness exists within the core telephony service component that manages voice communications and related telephony functions on mobile devices and communication systems. The absence of proper authorization verification creates an exploitable condition that allows unauthorized access to sensitive telephony information.
The technical flaw manifests as a failure in the permission validation mechanism that should normally verify whether a requesting process or application has appropriate authorization levels to access specific telephony data. This missing check typically occurs at the service boundary where telephony functions interface with other system components or user applications. The vulnerability specifically affects the telephony service daemon or system component responsible for managing call records, phone numbers, communication logs, and other sensitive telephony metadata. Without proper permission verification, any local process can potentially access this information through direct service invocation or API calls.
The operational impact of this vulnerability is significant as it enables local information disclosure without requiring any additional execution privileges or elevated access rights. An attacker with basic user-level access or a malicious application installed on the device can exploit this weakness to extract sensitive telephony data including call history, contact information, phone numbers, and communication logs. This information disclosure can lead to privacy violations, potential social engineering attacks, and exposure of personal communication patterns that may reveal sensitive location data or social relationships. The vulnerability affects the confidentiality aspect of the system's security model and can compromise the integrity of user communication data.
Security professionals should implement immediate mitigations including enforcing proper permission checks within the telephony service implementation, validating all incoming requests against appropriate authorization policies, and ensuring that sensitive telephony data is properly protected through access control mechanisms. The vulnerability aligns with CWE-284 which addresses improper access control and relates to ATT&CK technique T1068 which covers local privilege escalation and information gathering. Organizations should also consider implementing monitoring and logging of telephony service access attempts to detect potential exploitation attempts and ensure proper audit trails are maintained for security incident response.
The remediation approach should involve comprehensive code review of the telephony service component to identify and correct all missing permission checks, implementation of proper access control lists, and deployment of updated system firmware or software patches. System administrators should also verify that existing security policies properly restrict access to telephony services and that appropriate network segmentation prevents unauthorized access to telephony data. Regular security assessments and penetration testing should be conducted to validate that permission controls are properly enforced and that no similar vulnerabilities exist within the telephony service implementation.