CVE-2023-30941 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 • 08/02/2023
The vulnerability identified as CVE-2023-30941 represents a critical permission bypass issue within telephony service components that exposes sensitive information through inadequate access controls. This flaw exists in telephony service implementations where proper authorization checks have been omitted, allowing unauthorized local access to confidential data. The vulnerability specifically affects systems where telephony services operate with elevated privileges but fail to validate whether requesting processes possess appropriate permissions before granting access to sensitive information. The missing permission check creates a pathway for local attackers to extract confidential telephony data without requiring additional execution privileges, making the attack vector particularly concerning for environments where local access is commonly available.
The technical implementation flaw stems from the absence of proper authorization validation mechanisms within the telephony service framework. When applications or processes request access to telephony-related information, the system should verify that the requesting entity has appropriate permissions before fulfilling the request. This missing validation typically occurs at the service level where access control lists or permission verification routines are either absent or improperly implemented. The vulnerability manifests when legitimate telephony service components attempt to access sensitive data such as call logs, contact information, device configuration details, or communication metadata without proper authorization checks. This type of flaw aligns with CWE-284 which specifically addresses improper access control and represents a classic example of insufficient authorization in system components.
The operational impact of CVE-2023-30941 extends beyond simple information disclosure to potentially compromise the integrity of telephony communications and user privacy. Local attackers who can exploit this vulnerability gain access to sensitive telephony data that may include personal communication records, device identification information, and potentially confidential business communications. The lack of additional execution privileges required for exploitation means that even low-privilege local accounts can potentially access this sensitive information, creating a significant risk for environments where multiple users share systems or where privilege escalation opportunities exist. This vulnerability particularly affects mobile devices, enterprise communication systems, and any platform that relies on telephony services for core functionality. The information disclosed through this vulnerability could enable further attacks including social engineering, targeted phishing campaigns, or comprehensive surveillance operations.
Organizations should implement immediate mitigations including comprehensive permission audits to ensure all telephony service components properly validate access requests. System administrators should review existing access control policies and implement mandatory permission checking mechanisms for all telephony service interactions. The implementation of principle of least privilege should be enforced where telephony services only access necessary data and require explicit authorization for each access request. Regular security assessments should be conducted to identify similar permission bypass vulnerabilities across telephony service implementations. Patch management procedures should be prioritized to ensure timely deployment of vendor-provided fixes. Additionally, monitoring and logging should be enhanced to detect unauthorized access attempts to telephony services, providing visibility into potential exploitation attempts. Organizations should also consider implementing network segmentation and access controls to limit local access to telephony services where possible.
The vulnerability demonstrates characteristics consistent with ATT&CK technique T1074.001 which involves data staging through local data staging mechanisms and T1566.001 which covers spearphishing through social engineering. The missing permission check creates an environment where adversaries can collect sensitive telephony data without requiring additional privileges, aligning with the broader category of privilege escalation and information gathering techniques. This vulnerability also relates to the broader concept of insecure direct object references as described in CWE-639, where the lack of proper access control allows unauthorized access to telephony service objects. Security teams should incorporate this vulnerability into their threat modeling exercises and consider its implications for overall security posture, particularly in environments where telephony services are integral to business operations and user communications.