CVE-2023-30930 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-2023-30930 represents a critical security flaw within telephony service implementations where a missing permission check has been discovered. This weakness exists in the authorization mechanisms that govern access to telephony-related functionalities and data. The vulnerability specifically affects systems where telephony services operate, potentially exposing sensitive information to unauthorized local users who do not possess elevated privileges. The absence of proper permission validation creates an attack surface that allows malicious actors to access confidential telephony data without requiring additional execution privileges or elevated system access rights.
The technical nature of this flaw aligns with common security misconfigurations and authorization bypass vulnerabilities that fall under CWE-284, which addresses improper access control mechanisms. This vulnerability operates at the application level where the telephony service fails to properly validate user permissions before granting access to sensitive information. The missing permission check typically occurs when the system does not adequately verify whether the requesting entity has sufficient privileges to access specific telephony resources, such as call logs, contact information, voice messages, or system configuration data. The flaw is particularly concerning because it requires no additional execution privileges, making it accessible to any local user who can interact with the telephony service interface.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can lead to significant privacy breaches and potential escalation of attacks within telephony environments. Local information disclosure through this vulnerability allows attackers to access sensitive telephony data that may include personal communication records, contact details, call histories, and potentially system configuration information. This type of exposure can facilitate further attacks including social engineering campaigns, targeted phishing attempts, or even more sophisticated exploitation if the disclosed information includes system credentials or operational details. The vulnerability affects both enterprise telephony systems and consumer-grade telephony applications, making it particularly dangerous in environments where multiple users share the same system resources.
Mitigation strategies for CVE-2023-30930 should focus on implementing proper access control mechanisms and strengthening the authorization checks within telephony service implementations. Organizations should ensure that all telephony service components perform rigorous permission validation before granting access to sensitive data or functionality. This includes implementing principle of least privilege access controls, regular security audits of telephony service interfaces, and proper input validation to prevent unauthorized access attempts. The remediation process should involve comprehensive code reviews to identify and address missing permission checks, along with implementing proper logging and monitoring to detect unauthorized access attempts. Security professionals should also consider implementing network segmentation to limit local access to telephony services and ensure that system updates and patches are applied promptly to address this and similar authorization vulnerabilities. The ATT&CK framework categorizes this type of vulnerability under privilege escalation and credential access techniques, emphasizing the importance of proper access control implementation in preventing unauthorized information disclosure.