CVE-2022-48461 in SC7731E
Summary
by MITRE • 11/01/2023
In sensor driver, there is a possible out of bounds write due to a missing bounds check. This could lead to local denial of service with System execution privileges needed
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Analysis
by VulDB Data Team • 11/29/2023
The vulnerability identified as CVE-2022-48461 resides within a sensor driver component where an out-of-bounds write condition occurs due to insufficient input validation. This flaw represents a critical security weakness that could be exploited by malicious actors to disrupt system operations or potentially escalate privileges. The vulnerability specifically manifests when the sensor driver fails to perform adequate bounds checking on data inputs, allowing for memory corruption that could result in system instability or complete system failure.
From a technical perspective, this vulnerability stems from a missing bounds check in the sensor driver implementation, which is categorized under CWE-129 as "Improper Validation of Array Index." The absence of proper validation allows an attacker to manipulate input data that is processed by the driver, potentially leading to memory corruption through unauthorized writes beyond allocated buffer boundaries. This type of flaw commonly occurs when developers assume that input data will always conform to expected parameters without implementing sufficient validation mechanisms.
The operational impact of this vulnerability extends beyond simple denial of service scenarios, as it requires system execution privileges to exploit, indicating that a local attacker with access to the system could potentially leverage this weakness to cause persistent disruptions. When an out-of-bounds write occurs in a driver context, the consequences can be severe as drivers operate at the kernel level with high privileges, making such vulnerabilities particularly dangerous. The vulnerability could lead to system crashes, reboot loops, or even allow for privilege escalation if additional attack vectors are present within the system.
The exploitation of CVE-2022-48461 aligns with ATT&CK techniques related to privilege escalation and execution of malicious code within kernel space. This vulnerability could be weaponized through local attack vectors such as crafted sensor data inputs or by leveraging other system weaknesses to gain the necessary execution privileges. Security practitioners should consider this vulnerability in the context of broader system hardening efforts, particularly focusing on input validation and memory safety mechanisms within device drivers. The presence of such flaws highlights the importance of implementing robust code review processes and static analysis tools to identify missing bounds checks before deployment.
Mitigation strategies should include immediate patching of affected sensor driver components, implementation of enhanced input validation mechanisms, and regular security assessments of driver code. Organizations should also consider implementing runtime protections such as address space layout randomization and stack canaries to make exploitation more difficult. Additionally, monitoring for unusual system behavior or crash patterns could help identify potential exploitation attempts. The vulnerability serves as a reminder of the critical importance of memory safety in kernel-level code and the necessity of adhering to secure coding practices that prevent buffer overflows and out-of-bounds memory operations.