CVE-2023-42732 in SC7731E
Summary
by MITRE • 12/04/2023
In telephony service, there is a possible 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 • 12/22/2023
The vulnerability identified as CVE-2023-42732 represents a critical permission oversight within telephony service implementations that exposes systems to unauthorized information disclosure. This flaw resides in the core telephony service component responsible for managing voice communications and related system functions. The missing permission check creates a pathway for malicious actors to access sensitive telephony data without requiring elevated privileges or additional execution capabilities. Such vulnerabilities are particularly concerning in telephony environments where system integrity and user privacy are paramount. The vulnerability demonstrates a fundamental failure in access control mechanisms that should prevent unauthorized data exposure. The security implications extend beyond simple information disclosure as telephony systems often contain sensitive communication metadata, user identification information, and system configuration details that could be leveraged for further attacks.
The technical flaw manifests as an insufficient validation of user permissions within the telephony service architecture, allowing local processes to bypass expected authorization checks. This type of vulnerability aligns with CWE-284, which specifically addresses improper access control issues in software systems. The vulnerability operates at the service level where legitimate telephony operations should enforce strict permission boundaries, yet fails to validate whether requesting processes possess adequate authorization. The missing check typically occurs in function calls or API endpoints that handle telephony data access, where the system assumes that authorized processes can freely access all telephony-related resources. This design oversight creates a persistent security gap that can be exploited by any local user or process with basic system access, effectively removing the need for complex exploitation techniques or privilege escalation methods.
The operational impact of CVE-2023-42732 extends significantly beyond immediate information disclosure, as telephony systems often serve as critical infrastructure components within enterprise environments. Local information disclosure can expose call logs, user authentication data, device identification information, and communication patterns that adversaries could use for social engineering attacks or targeted exploitation. The vulnerability's accessibility means that even low-privilege local accounts could potentially access sensitive telephony data, creating a substantial risk for organizations relying on secure communication systems. Security professionals should consider this vulnerability in the context of the ATT&CK framework, specifically under the T1083 discovery technique where adversaries gather information about the system environment. The vulnerability's exploitation requires no additional execution privileges, making it particularly dangerous as it can be leveraged by malicious insiders or compromised local accounts without requiring additional attack vectors or privilege escalation mechanisms.
Organizations should implement immediate mitigations including comprehensive permission reviews of telephony service components, implementation of mandatory access controls, and regular security assessments of system interfaces. The vulnerability highlights the importance of principle of least privilege enforcement and proper authorization validation within service-oriented architectures. System administrators should conduct thorough audits of telephony service configurations, ensuring that all data access points properly validate user permissions and implement appropriate access controls. Additionally, organizations should consider deploying monitoring solutions that can detect unauthorized access attempts to telephony data and establish incident response procedures specifically addressing information disclosure vulnerabilities. The remediation approach should include code-level fixes that enforce proper permission checking, along with system-level configurations that restrict access to telephony service components based on verified user credentials and authorization levels.