CVE-2022-47487 in SC9863A
Summary
by MITRE • 05/09/2023
In thermal service, there is a possible out of bounds write due to a missing bounds check. This could lead to local denial of service local denial of service with no additional execution privileges.
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Analysis
by VulDB Data Team • 01/29/2025
The vulnerability identified as CVE-2022-47487 resides within the thermal service component of a system, representing a critical bounds checking failure that manifests as an out-of-bounds write condition. This flaw occurs when the thermal service processes incoming data without properly validating array or buffer boundaries, creating an opportunity for memory corruption that can be exploited to disrupt system operations. The vulnerability specifically affects systems where thermal monitoring services are active and processing external inputs or internal temperature data streams that may contain malformed or excessively sized payloads. The absence of proper bounds validation allows an attacker to manipulate memory locations beyond the intended buffer limits, potentially causing system instability or complete service termination.
The technical implementation of this vulnerability stems from inadequate input validation mechanisms within the thermal service's data processing routines. When the service receives temperature readings, sensor data, or configuration parameters, it fails to verify that the data fits within predetermined memory boundaries before writing to allocated buffers. This condition creates a classic buffer overflow scenario where the service writes data beyond the allocated memory space, potentially overwriting adjacent memory locations including critical control structures, function pointers, or other service state information. The flaw operates at the memory management level and represents a direct violation of secure coding practices, specifically addressing weakness categories outlined in CWE-129 and CWE-787 which detail insufficient bounds checking and out-of-bounds writes respectively.
From an operational perspective, the impact of CVE-2022-47487 manifests as a local denial of service condition that can effectively disable the thermal monitoring capabilities of affected systems. While the vulnerability does not require elevated execution privileges for exploitation, it does necessitate local access to the system where the thermal service is running, making it particularly concerning in environments where physical access or local user accounts are available. The service disruption can lead to complete loss of thermal monitoring functionality, potentially resulting in overheating conditions going undetected, which may cascade into more severe system failures or hardware damage. Attackers can leverage this vulnerability to repeatedly cause service crashes, creating persistent availability issues that may require system restarts or manual intervention to restore normal operations.
The mitigation strategies for this vulnerability primarily focus on implementing proper bounds checking mechanisms within the thermal service codebase. System administrators should prioritize applying vendor-provided patches or updates that address the specific bounds checking deficiencies in the thermal service implementation. Additionally, implementing input validation controls that enforce strict size limits on all data streams processed by the thermal service can prevent exploitation attempts. The solution should incorporate defensive programming practices including array boundary checks, use of safe string handling functions, and memory protection mechanisms that can detect and prevent unauthorized memory access patterns. Organizations should also consider implementing monitoring solutions that can detect anomalous thermal service behavior or repeated service crashes that may indicate exploitation attempts, aligning with ATT&CK technique T1499.004 for avoiding detection through service disruption. Regular security assessments of system components and adherence to secure coding standards should be maintained to prevent similar vulnerabilities from emerging in future implementations.