CVE-2022-47338 in SC9863A
Summary
by MITRE • 04/11/2023
In telecom service, there is a missing permission check. This could lead to local denial of service in telecom service.
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Analysis
by VulDB Data Team • 04/28/2023
The vulnerability identified as CVE-2022-47338 represents a critical security flaw within telecom service implementations where a missing permission check creates an avenue for unauthorized local system disruption. This issue specifically targets the telecommunications infrastructure components that handle service operations, potentially allowing malicious actors with local access to exploit the absence of proper authorization controls. The vulnerability stems from insufficient validation mechanisms that should normally verify user privileges before granting access to critical service functions. Without proper permission verification, any local entity with sufficient access rights can manipulate telecom service operations to cause system instability or complete service interruption.
The technical flaw manifests as a failure in the authorization framework where the system does not adequately validate whether a requesting entity possesses the necessary permissions to execute specific telecom service operations. This missing validation creates a privilege escalation path that can be exploited to disrupt service availability. The vulnerability typically occurs in telecom service daemons or system components that manage call routing, network signaling, or service provisioning functions. When these components fail to perform proper permission checks, they become susceptible to manipulation by local processes or users who can invoke restricted operations through crafted requests or direct system calls.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise the entire telecom infrastructure reliability. Local denial of service conditions can result in cascading failures affecting multiple service components and potentially impacting thousands of concurrent users. Attackers can leverage this weakness to terminate critical service processes, corrupt service state information, or prevent legitimate service requests from being processed. The vulnerability's local nature means that exploitation requires only local system access, making it particularly dangerous in environments where physical or network access is not properly controlled. This type of vulnerability directly impacts the availability aspect of the CIA triad and can be classified under CWE-284, which addresses improper access control mechanisms.
Mitigation strategies for CVE-2022-47338 should focus on implementing comprehensive permission checking mechanisms throughout the telecom service architecture. System administrators must ensure that all service components perform strict authorization validation before executing sensitive operations, particularly those related to service provisioning, call management, and network signaling. The implementation should follow established security principles including least privilege access, mandatory access controls, and proper input validation for all service interfaces. Organizations should also consider implementing runtime monitoring and anomaly detection systems that can identify unauthorized access attempts or abnormal service behavior patterns. Additionally, regular security assessments and penetration testing should be conducted to verify that permission controls are functioning correctly and that no additional authorization gaps exist within the telecom service ecosystem.
This vulnerability aligns with several ATT&CK framework techniques including privilege escalation and denial of service, specifically targeting the T1068 privilege escalation technique and T1499 network denial of service. The attack surface for this vulnerability encompasses telecom service management interfaces, system daemons, and local process execution points where unauthorized access could lead to service disruption. Security teams should implement layered defense strategies that include proper access controls, system hardening measures, and continuous monitoring to prevent exploitation of this permission validation weakness. The remediation process requires careful consideration of existing service dependencies and proper testing to ensure that permission enforcement does not inadvertently break legitimate service functionality while effectively blocking unauthorized access attempts.