CVE-2023-30937 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-2023-30937 represents a critical security flaw within telephony service implementations where a missing permission check has been discovered. This weakness resides in the core authorization mechanisms of telephony systems, where proper access controls have not been adequately enforced. The vulnerability specifically affects telephony services that handle sensitive communication data and system information, creating a pathway for unauthorized access to confidential information without requiring any additional privileges or execution capabilities beyond basic system access. The flaw demonstrates a fundamental breakdown in the principle of least privilege enforcement, where legitimate users may gain access to information they should not be permitted to view.
This technical deficiency falls under the category of inadequate permission checking mechanisms, which aligns with CWE-284, the Common Weakness Enumeration classification for improper access control. The vulnerability operates at the service level where telephony applications fail to properly validate user permissions before granting access to sensitive data streams or system information. Attackers can exploit this weakness by leveraging the existing system access to retrieve confidential telephony-related information, including call logs, user data, communication metadata, and potentially system configuration details that could reveal further attack vectors.
The operational impact of CVE-2023-30937 extends beyond simple information disclosure, as it can provide attackers with valuable reconnaissance data that could be used for more sophisticated attacks. Local information disclosure through this vulnerability means that any user with basic system access can potentially retrieve sensitive telephony data, which may include personal identification information, communication patterns, and system vulnerabilities. This type of exposure can enable adversaries to conduct targeted social engineering attacks, map communication networks, or identify potential targets for further exploitation. The attack surface is particularly concerning in enterprise telephony environments where the compromised information could reveal internal communication structures and user relationships.
The exploitation of this vulnerability aligns with ATT&CK technique T1083, which covers directory and file system discovery, and T1005, which addresses data from local system. The lack of additional execution privileges required for exploitation means that this vulnerability can be leveraged by attackers with minimal initial access, making it particularly dangerous in environments where basic user accounts are commonly available. Organizations should implement immediate mitigations including comprehensive permission audits, enforcement of mandatory access controls, and regular security assessments of telephony service implementations. The vulnerability demonstrates the critical importance of proper authorization checking in telecommunications infrastructure, where the confidentiality of communication data is paramount to maintaining trust and security in enterprise and consumer environments.
Mitigation strategies should include mandatory permission verification for all telephony service operations, implementation of role-based access controls, and regular security testing of telephony applications. System administrators should conduct thorough access control reviews and ensure that all telephony services enforce proper authentication and authorization checks. The vulnerability also highlights the need for adherence to security standards such as those outlined in NIST SP 800-53, which emphasizes the importance of access control mechanisms in protecting sensitive information. Organizations should prioritize patch management for affected telephony systems and consider implementing network segmentation to limit potential lateral movement if exploitation occurs. Regular monitoring and logging of telephony service access attempts can help detect and respond to unauthorized access attempts that may exploit this vulnerability.