CVE-2023-30913 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-2023-30913 represents a critical security flaw within telephony service implementations where proper permission validation mechanisms are absent. This missing permission check creates an exploitable condition that allows unauthorized local access to sensitive information without requiring any additional privileges or execution capabilities. The flaw exists at the authorization layer of the telephony service architecture, where the system fails to properly verify whether a requesting entity has appropriate clearance to access specific telephony-related data or functions. Such a vulnerability directly contravenes fundamental security principles of least privilege and mandatory access control that are essential for maintaining system integrity and data confidentiality.
The technical implementation of this vulnerability stems from inadequate input validation and access control enforcement within the telephony service component. When legitimate telephony operations are performed, the system should verify that the calling process or user possesses the necessary permissions before granting access to telephony resources. However, in this case, the permission checking mechanism has been omitted or bypassed, creating a pathway for local processes to access telephony service data that should otherwise be restricted. This issue can be categorized under CWE-284 which specifically addresses improper access control vulnerabilities, and aligns with ATT&CK technique T1068 which covers local privilege escalation and information gathering through improper access controls. The flaw manifests as a lack of proper authentication and authorization checks that should occur during service interactions, particularly when dealing with sensitive telephony information such as call logs, contact details, or configuration parameters.
The operational impact of CVE-2023-30913 extends beyond simple information disclosure, as local attackers can potentially extract sensitive telephony data that may contain personal information, business communications, or other confidential details. This vulnerability is particularly concerning because it requires no additional execution privileges or elevated permissions, making it accessible to any local process or user who can interact with the telephony service. Attackers could leverage this flaw to gather intelligence about communication patterns, identify potential targets for social engineering attacks, or extract sensitive data that could be used for further exploitation. The local nature of the vulnerability means that it could be exploited by malware or compromised applications running on the same system, potentially leading to more extensive compromise through information gathering and reconnaissance activities. Organizations using affected telephony services may experience unauthorized access to call records, contact information, and potentially system configuration details that could reveal additional attack vectors.
Mitigation strategies for CVE-2023-30913 should focus on implementing robust permission checking mechanisms within the telephony service components. System administrators should ensure that all telephony service operations enforce proper authentication and authorization checks before granting access to sensitive data or functions. This includes implementing mandatory access controls, validating user credentials, and enforcing privilege levels for different telephony operations. Organizations should also conduct comprehensive security audits of their telephony service implementations to identify and remediate similar permission checking deficiencies. The fix should involve adding proper permission validation code that verifies the requesting entity's authorization level before allowing access to telephony resources, which aligns with security best practices outlined in industry standards such as NIST SP 800-53 and ISO 27001. Regular security testing and code reviews should be implemented to prevent similar vulnerabilities from being introduced in future updates or modifications to the telephony service components.