CVE-2023-32789 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 • 08/02/2023
The vulnerability identified as CVE-2023-32789 represents a critical authorization flaw within telephony service implementations that exposes sensitive system information to unauthorized local users. This issue stems from a missing permission check mechanism that fails to validate whether requesting processes possess appropriate access rights before granting information disclosure privileges. The vulnerability specifically affects telephony service components that handle communication protocols and system status information, creating a pathway for local attackers to access confidential data without requiring elevated privileges or additional malicious code execution.
The technical implementation flaw manifests as an insufficient access control validation within the telephony service framework where certain system resources and communication metadata are exposed without proper authentication verification. This missing permission check creates a direct information disclosure vector that allows local processes to retrieve telephony-related data including call logs, network status information, device identifiers, and potentially sensitive communication parameters. The vulnerability operates at the system level where the telephony service fails to enforce proper privilege boundaries, enabling any local user to exploit this weakness regardless of their actual authorization status within the system.
From an operational impact perspective, this vulnerability significantly weakens the security posture of affected systems by providing local attackers with unauthorized access to telephony service information that could be leveraged for further exploitation. The information disclosure encompasses data that may reveal network topology, device configurations, communication patterns, and potentially sensitive user information that could aid in crafting more sophisticated attacks. Attackers could use this information to map network infrastructure, identify vulnerable components, or gather intelligence for privilege escalation attempts. The lack of additional execution privileges required for exploitation means that even users with minimal system access can potentially compromise telephony service confidentiality.
Security professionals should consider this vulnerability in relation to CWE-284 which addresses improper access control and ATT&CK technique T1083 which covers file and directory discovery. The vulnerability aligns with these frameworks as it represents a failure in access control mechanisms that results in unauthorized information disclosure. Organizations should implement immediate mitigations including enforcing proper permission checks within telephony service components, reviewing access control policies, and ensuring that system resources are properly protected from unauthorized local access. Additionally, system administrators should conduct thorough audits of telephony service configurations to identify and remediate similar permission check gaps that may exist in other system components.
The remediation approach should focus on implementing comprehensive access control validation mechanisms within telephony service frameworks, ensuring that all information disclosure operations require proper authentication and authorization checks. This includes establishing clear privilege boundaries, implementing role-based access controls, and conducting regular security assessments to identify potential missing permission checks. Organizations should also consider deploying monitoring solutions that can detect unauthorized access attempts to telephony service resources and implement proper logging mechanisms to track information disclosure events. Regular security updates and patches should be applied to address this vulnerability and prevent exploitation by threat actors who may target telephony service information for reconnaissance or further attacks.