CVE-2023-30938 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-2023-30938 represents a critical permission flaw within telephony service components that exposes sensitive information through improper access controls. This issue affects systems where telephony services operate with insufficient authorization validation mechanisms, creating potential entry points for unauthorized data access. The vulnerability stems from a missing permission check that should have been implemented to verify user credentials and privileges before granting access to telephony-related information. Such lapses in access control are particularly concerning in telephony environments where call logs, contact information, voice messages, and other sensitive communication data may be accessible through compromised service interfaces.
The technical implementation flaw manifests as a failure in the service's authorization framework where the system does not properly validate whether a requesting entity has adequate permissions to access specific telephony resources. This missing validation occurs at the service layer where telephony functions are exposed to client applications or internal processes. The vulnerability operates under the principle of least privilege violation, where entities can access resources beyond their designated permissions. Attackers can exploit this weakness by directly accessing telephony service endpoints without requiring additional execution privileges or elevated access rights, making the attack surface significantly broader than typical permission-based exploits.
From an operational perspective, this vulnerability creates substantial risk for organizations relying on telephony services for business communications, as it enables local information disclosure without requiring malicious code execution or privilege escalation. The impact extends beyond simple data exposure to potentially compromise user privacy, business intelligence, and communication security. In enterprise environments, this could lead to unauthorized access to sensitive business communications, personal information of employees or customers, and potentially expose communication patterns that could be leveraged for further attacks. The lack of additional execution privileges needed makes this particularly dangerous as it requires minimal attack complexity to achieve information disclosure objectives.
The vulnerability aligns with CWE-284 which specifically addresses improper access control, and maps to ATT&CK technique T1074.001 for data staging through local data collection. Organizations should implement comprehensive access control measures including proper authentication checks, authorization validation, and privilege enforcement mechanisms. Mitigation strategies include immediate implementation of permission validation checks, regular security audits of service interfaces, and deployment of network segmentation controls to limit access to telephony services. Additionally, organizations should conduct thorough vulnerability assessments to identify similar permission flaws in other service components and establish robust monitoring systems to detect unauthorized access attempts to telephony resources. The remediation process must ensure that all telephony service endpoints properly validate user credentials and enforce appropriate access controls based on role-based permissions to prevent unauthorized information disclosure.