CVE-2023-30942 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-2023-30942 represents a critical authorization flaw within telephony service implementations where insufficient permission validation exists for accessing sensitive system information. This missing permission check creates a pathway for unauthorized local access to confidential data that should typically be restricted to privileged processes or users. The vulnerability specifically affects telephony services that handle voice communication protocols and related system components, making it particularly concerning for enterprise environments where communication systems are integral to business operations. The flaw resides in the service's access control mechanisms, where proper authentication and authorization checks are either absent or improperly implemented, allowing any local user to potentially extract sensitive telephony-related information without requiring elevated privileges or additional malicious actions.
From a technical perspective, this vulnerability operates at the application layer where telephony services interface with the operating system's security controls. The missing permission check typically manifests as inadequate validation of caller credentials or process privileges when accessing telephony-related system resources, configuration files, or communication channels. Attackers can exploit this weakness by executing local processes that attempt to access restricted telephony service interfaces, potentially gaining access to call logs, user authentication details, network configuration parameters, or other sensitive information typically protected by proper access controls. This type of vulnerability aligns with CWE-284 which specifically addresses improper access control issues, where the system fails to properly enforce access restrictions for protected resources. The operational impact is significant because the vulnerability does not require additional execution privileges beyond normal user access, making it particularly dangerous in multi-user environments where local accounts might be compromised or where privilege escalation techniques are not necessary to exploit the flaw.
The security implications of CVE-2023-30942 extend beyond simple information disclosure, as the leaked telephony data could potentially enable further attacks within the network infrastructure. Local information disclosure vulnerabilities like this one can serve as initial access points for more sophisticated attacks, allowing threat actors to gather intelligence about network topology, user accounts, and communication patterns that could facilitate lateral movement or targeted attacks against other system components. The vulnerability's exploitation is particularly concerning in enterprise telephony environments where systems handle sensitive communications, customer data, and business-critical voice services. Organizations implementing telephony services that are vulnerable to this flaw face potential regulatory compliance issues, as unauthorized access to communication data could violate privacy regulations and data protection standards. The ATT&CK framework categorizes this vulnerability under privilege escalation and credential access techniques, where the missing permission check enables adversaries to obtain information that would normally require elevated privileges. This makes the vulnerability particularly attractive to attackers who may use the gathered information to plan more targeted attacks against the broader network infrastructure or to conduct social engineering operations that leverage the telephony data for additional exploitation.
Organizations should immediately implement mitigations including thorough access control reviews, mandatory permission validation for all telephony service interfaces, and regular security audits of communication system components. System administrators should ensure that all telephony services are running with the principle of least privilege, limiting access to only authorized processes and users. Network segmentation strategies should be implemented to isolate telephony services from general user access where possible. Additionally, organizations should monitor for unauthorized access attempts to telephony-related system resources and implement logging mechanisms that can detect potential exploitation attempts. The vulnerability highlights the importance of proper security testing during the development lifecycle, particularly for system services that handle sensitive data. Regular updates and patches should be applied to telephony services to address known authorization flaws, while security awareness training should emphasize the importance of proper access control implementation. Organizations should also consider implementing intrusion detection systems that can identify suspicious access patterns to telephony service interfaces, providing early warning capabilities for potential exploitation attempts. The remediation process should include comprehensive testing to ensure that permission checks are properly enforced without disrupting legitimate service functionality, as improper implementation of access controls can lead to denial of service conditions or service interruptions that could impact business operations.