CVE-2023-30936 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-2023-30936 represents a critical security flaw within telephony service implementations where a missing permission check has been discovered. This weakness exists in the underlying system architecture that governs telephony operations and communications. The vulnerability specifically affects the authorization mechanisms that should normally validate user privileges before granting access to sensitive telephony data. Without proper permission validation, unauthorized access to telephony information becomes possible through local system interactions. The flaw resides in the service layer that manages telephony functions, where access controls have been improperly configured or omitted entirely. This creates a scenario where any local user or process can potentially retrieve confidential telephony data without requiring additional privileges or execution rights.
The technical nature of this vulnerability aligns with CWE-284, which describes improper access control mechanisms in software systems. This weakness allows for unauthorized information disclosure by bypassing the normal permission validation processes that should occur before data access. The attack vector leverages local system access points where the missing permission check creates a direct pathway for information retrieval. The vulnerability does not require any special execution privileges or elevated user rights to exploit, making it particularly dangerous as it can be exploited by any local entity with basic system access. This type of flaw typically occurs when developers fail to implement proper access control validation or when the permission checking logic has been inadvertently removed or bypassed during system development or updates.
The operational impact of CVE-2023-30936 extends beyond simple information disclosure, potentially compromising the integrity and confidentiality of telephony communications. Local attackers can gain access to sensitive telephony data including call logs, contact information, voice mail messages, and potentially system configuration details that could be used for further attacks. The vulnerability creates a persistent security risk that remains active as long as the affected telephony service continues to operate without proper patching. Organizations may experience significant reputational damage and regulatory compliance issues if telephony data is compromised through this vulnerability. The lack of additional execution privileges required for exploitation means that even basic user accounts or unprivileged processes can exploit this weakness, expanding the potential attack surface considerably.
Mitigation strategies for CVE-2023-30936 should focus on implementing robust permission checking mechanisms within the telephony service framework. System administrators must ensure that all access points to telephony data are properly validated through comprehensive authorization checks before any information is returned. The fix typically involves patching the affected telephony service to restore proper permission validation logic and implementing additional monitoring for unauthorized access attempts. Organizations should also consider implementing network segmentation and access controls to limit local system access where possible. Security teams should conduct regular vulnerability assessments and penetration testing to identify similar permission checking gaps in other system components. The remediation process should include thorough code reviews to ensure that all data access points properly validate user privileges and that no similar permission checking mechanisms have been inadvertently removed from the system. Implementation of principle of least privilege and regular access control audits will help prevent similar issues from emerging in future system deployments and updates.