CVE-2022-47366 in SC9863A
Summary
by MITRE • 02/12/2023
In wlan driver, there is a possible out of bounds write due to a missing bounds 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-2022-47366 resides within wireless local area network driver components, specifically exposing a critical out-of-bounds write condition that arises from insufficient input validation mechanisms. This flaw manifests when the wireless driver fails to properly validate array indices or buffer boundaries before performing write operations, creating an exploitable condition that can be leveraged by malicious actors with local system access. The absence of proper bounds checking in the driver's memory management routines allows for unauthorized data to be written beyond allocated memory regions, potentially corrupting adjacent memory structures and compromising system stability. The vulnerability is classified under CWE-129 as an insufficient bounds checking issue, which directly relates to improper validation of input data before memory operations. From an operational security perspective, this weakness represents a significant risk to wireless network services as it can be exploited to trigger denial of service conditions that disrupt wireless connectivity and network availability.
The technical implementation of this vulnerability stems from the driver's failure to validate user-supplied parameters or network frame data before processing and storing information in memory buffers. When wireless network packets are received and processed by the driver, the absence of proper boundary checks means that malformed or oversized data structures can cause the driver to write data beyond the intended memory allocation. This condition typically occurs during the parsing of wireless management frames or data packets where the driver calculates buffer sizes based on received field values without verifying that these values remain within acceptable limits. The lack of validation creates a scenario where an attacker can craft malicious wireless frames that, when processed by the vulnerable driver, trigger memory corruption through out-of-bounds writes. This flaw aligns with ATT&CK technique T1059.007 for command and scripting interpreter usage, as exploitation may involve crafting specific wireless frames or network conditions to trigger the vulnerable code path.
The operational impact of CVE-2022-47366 extends beyond simple service disruption to potentially compromise the entire wireless subsystem of affected devices. Local attackers with access to the system can leverage this vulnerability to cause persistent denial of service conditions that affect wireless connectivity for extended periods, requiring system restarts or driver reinstallation to restore normal functionality. The vulnerability's exploitable nature means that any device running the affected wireless driver version is at risk, particularly in environments where wireless network services are critical for operations. Network administrators must consider the potential for cascading failures when wireless services become unavailable, as many enterprise and consumer devices rely heavily on wireless connectivity for communication and data transfer. The attack surface is further expanded by the fact that the vulnerability can be triggered through normal wireless network operations, making it difficult to detect and prevent through conventional network monitoring approaches. Organizations utilizing wireless infrastructure should implement immediate patch management strategies to address this vulnerability, as the potential for exploitation increases with the complexity of wireless network environments and the number of connected devices.
Mitigation strategies for CVE-2022-47366 should prioritize immediate patch deployment from vendors, as the vulnerability represents a clear and present danger to wireless network availability. System administrators should also implement network monitoring solutions that can detect anomalous wireless traffic patterns that may indicate exploitation attempts, particularly focusing on malformed wireless frames or unusual network behavior. The implementation of network segmentation and access controls can help limit the potential impact of exploitation by restricting local access to systems running vulnerable wireless drivers. Additionally, organizations should conduct thorough vulnerability assessments to identify all devices running affected driver versions and establish monitoring protocols to detect potential exploitation attempts. From a defensive standpoint, the vulnerability highlights the importance of robust input validation and bounds checking in device driver development, emphasizing the need for adherence to secure coding practices that prevent memory corruption vulnerabilities. Regular security audits of driver components and implementation of automated patch management systems will help ensure that similar vulnerabilities are identified and addressed before they can be exploited in real-world scenarios. The incident also underscores the necessity of maintaining up-to-date security patches for all network infrastructure components, as wireless drivers represent critical attack vectors that can compromise entire network ecosystems.