CVE-2022-33983 : Security Advisory and Response
Get insights into CVE-2022-33983, a vulnerability concerning DMA transactions targeting input buffers of the NvmExpressLegacy software SMI handler, leading to SMRAM corruption through TOCTOU attack.
This article provides detailed information about CVE-2022-33983, a vulnerability related to DMA transactions targeted at input buffers used for the NvmExpressLegacy software SMI handler, leading to SMRAM corruption through a TOCTOU attack.
Understanding CVE-2022-33983
This section dives into the vulnerability, its impact, technical details, and mitigation strategies.
What is CVE-2022-33983?
CVE-2022-33983 involves DMA transactions aimed at input buffers used by the NvmExpressLegacy software SMI handler, causing SMRAM corruption due to a TOCTOU attack.
The Impact of CVE-2022-33983
The vulnerability enables attackers to corrupt SMRAM, potentially leading to unauthorized access or control over system resources and sensitive data.
Technical Details of CVE-2022-33983
Explore specific technical aspects of the vulnerability, including its description, affected systems, and the exploitation mechanism.
Vulnerability Description
Insyde engineering identified that DMA transactions targeting specific input buffers utilized by the NvmExpressLegacy driver could result in SMRAM corruption due to a TOCTOU attack.
Affected Systems and Versions
The vulnerability impacts the NvmExpressLegacy driver across multiple kernel versions, including kernel 5.2, 5.3, 5.4, and 5.5.
Exploitation Mechanism
Attackers can exploit this vulnerability by manipulating DMA transactions directed at the input buffers of the NvmExpressLegacy software SMI handler.
Mitigation and Prevention
Discover effective strategies to mitigate the risks associated with CVE-2022-33983 and prevent potential exploits.
Immediate Steps to Take
Users are advised to apply the relevant patches released for kernel versions affected by CVE-2022-33983 to eliminate the vulnerability.
Long-Term Security Practices
Implement strict access controls, regularly update software and firmware, and conduct security assessments to enhance overall system security.
Patching and Updates
Stay informed about security updates related to the NvmExpressLegacy driver and ensure timely application to protect systems from potential attacks.