CVE-2022-48391 in SC9863A
Summary
by MITRE • 06/06/2023
In telephony service, there is a possible missing permission check. This could lead to local denial of service with no additional execution privileges.
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Analysis
by VulDB Data Team • 01/08/2025
The vulnerability identified as CVE-2022-48391 resides within telephony service implementations where a critical missing permission check has been discovered. This flaw represents a significant security oversight that could potentially be exploited to disrupt telephony services locally without requiring any additional execution privileges. The vulnerability stems from inadequate access control mechanisms that fail to properly validate user permissions before granting access to telephony service functionalities. Such a missing permission check creates an attack surface where unauthorized local processes or users could potentially manipulate telephony service operations, leading to service disruption.
The technical nature of this vulnerability aligns with CWE-284, which specifically addresses improper access control issues in software systems. This weakness manifests when applications fail to properly enforce authorization checks, allowing entities to perform operations they should not be permitted to execute. In the context of telephony services, this could involve unauthorized access to call management functions, voice messaging systems, or other telephony-related features. The vulnerability operates at the system level where permission validation mechanisms have been bypassed, creating a scenario where local processes can manipulate telephony service behavior without proper authorization.
From an operational impact perspective, this vulnerability presents a potential local denial of service threat that could severely disrupt communication services within affected systems. The lack of additional execution privileges required for exploitation suggests that the attack vector is accessible to users with basic local system access, making it particularly concerning for environments where multiple users share the same system or where privilege escalation is possible through other means. The denial of service impact could affect critical communication infrastructure, potentially disrupting emergency services, business communications, or personal telephony functions depending on the deployment environment.
The exploitation of this vulnerability could enable attackers to cause telephony services to become unresponsive or cease functioning entirely, depending on the specific implementation details and the nature of the missing permission checks. Such disruptions could have cascading effects in enterprise environments where telephony services integrate with other business systems, potentially affecting productivity and communication workflows. The low privilege requirement for exploitation makes this vulnerability particularly dangerous as it could be leveraged by malicious actors with minimal system access, potentially leading to prolonged service disruptions that are difficult to detect and remediate.
Mitigation strategies for CVE-2022-48391 should focus on implementing proper access control mechanisms and strengthening permission validation within telephony service implementations. System administrators should ensure that all telephony service components enforce appropriate authorization checks before allowing access to critical functions. This includes implementing robust permission validation at multiple levels within the telephony service architecture and conducting regular security assessments to identify potential access control weaknesses. The remediation approach should involve comprehensive code reviews to ensure that all telephony service operations properly validate user permissions and that appropriate access control policies are enforced throughout the system. Additionally, organizations should consider implementing monitoring solutions to detect unauthorized access attempts to telephony services and establish incident response procedures to quickly address potential exploitation attempts. The vulnerability also highlights the importance of following security best practices such as the principle of least privilege and regular security testing to prevent similar access control weaknesses from being introduced in future implementations.