CVE-2022-47322 in SC9863A
Summary
by MITRE • 02/12/2023
In wlan driver, there is a possible missing params check. This could lead to local denial of service in wlan services.
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Analysis
by VulDB Data Team • 03/10/2023
The vulnerability identified as CVE-2022-47322 resides within wireless local area network driver components, specifically affecting the handling of parameter validation during wlan service operations. This issue represents a critical weakness in the driver's input validation mechanisms that could be exploited to disrupt wireless communication services. The flaw manifests when the wlan driver fails to properly validate incoming parameters during service operations, creating a potential attack surface that adversaries could leverage for service disruption. Such vulnerabilities are particularly concerning in wireless infrastructure where uninterrupted connectivity is paramount for network operations and user experience.
From a technical perspective, the vulnerability stems from inadequate parameter checking within the wlan driver's operational code paths. When the driver processes incoming requests or configuration parameters, it does not sufficiently validate the integrity or correctness of these inputs before proceeding with service operations. This missing validation check creates a scenario where malformed or unexpected parameters could cause the driver to enter an undefined state, ultimately leading to service termination or complete denial of wireless service functionality. The flaw aligns with common software security principles where input validation is fundamental to preventing various classes of exploits and system instability. According to CWE classification, this vulnerability maps to CWE-252, which encompasses "Unchecked Return Value" and represents a deviation from proper error handling protocols. The absence of proper parameter validation creates an environment where the driver's state management becomes compromised, potentially leading to resource exhaustion or memory corruption scenarios that could escalate beyond simple denial of service.
The operational impact of CVE-2022-47322 extends beyond simple service disruption to encompass broader network reliability concerns and potential security implications. Local attackers with access to the affected system could exploit this vulnerability to induce persistent denial of service conditions within wlan services, effectively preventing legitimate wireless communication. This disruption could be particularly damaging in enterprise environments where wireless connectivity is critical for business operations, or in scenarios where wireless infrastructure supports time-sensitive applications such as industrial control systems or emergency services communications. The vulnerability's local nature means that exploitation requires physical or network access to the target system, but this access requirement does not diminish its potential impact on overall system availability. From an adversarial perspective, this vulnerability could be leveraged as part of a broader attack chain to degrade network services or create cover for other exploitation techniques, aligning with ATT&CK technique T1499.002 which covers "Network Denial of Service" and T1566.002 for "Phishing via Service" when combined with social engineering approaches to gain local access. The disruption could manifest as complete wireless service outages, intermittent connectivity issues, or gradual degradation of service quality that makes the network unreliable for legitimate users.
Mitigation strategies for CVE-2022-47322 should prioritize immediate patch deployment from vendors, as this represents a critical vulnerability that requires prompt remediation. System administrators should implement comprehensive monitoring for unusual wlan service behavior that could indicate exploitation attempts, including tracking service restart patterns, error logs, and resource utilization anomalies. Network segmentation and access controls should be strengthened to limit potential attack vectors and prevent unauthorized local access to systems running vulnerable wlan drivers. Additionally, implementing runtime protections such as address space layout randomization and stack canaries could help mitigate potential exploitation attempts, though these measures are secondary to proper patch management. Organizations should also consider implementing automated patch management systems to ensure timely deployment of security updates, as delays in patching leave systems vulnerable to exploitation. The vulnerability highlights the importance of robust input validation in device driver code and underscores the need for comprehensive security testing of network infrastructure components. Regular security assessments of wireless infrastructure, including driver firmware updates, should be integrated into overall security management processes to prevent similar vulnerabilities from accumulating in the network ecosystem.