CVE-2022-32470 : What You Need to Know
Discover insights into CVE-2022-32470 impacting Insyde InsydeH2O with kernel 5.0 through 5.5. Learn about the vulnerability, impact, affected systems, and mitigation steps.
Understanding CVE-2022-32470
Insyde InsydeH2O with kernel 5.0 through 5.5 is impacted by a security issue related to DMA attacks on the FwBlockServiceSmm shared buffer.
What is CVE-2022-32470?
CVE-2022-32470 involves a TOCTOU race-condition issue that could result in corruption of SMRAM and privilege escalation due to DMA attacks on the FwBlockServiceSmm shared buffer.
The Impact of CVE-2022-32470
Exploitation of this vulnerability can lead to unauthorized access and manipulation of system memory, potentially allowing attackers to escalate their privileges on the affected system.
Technical Details of CVE-2022-32470
This section provides more insight into the vulnerability, affected systems, and exploitation mechanism.
Vulnerability Description
The vulnerability in Insyde InsydeH2O with kernel 5.0 through 5.5 allows for DMA attacks on the FwBlockServiceSmm shared buffer, posing a risk of SMRAM corruption and privilege escalation.
Affected Systems and Versions
The issue affects systems running Insyde InsydeH2O firmware with kernel versions ranging from 5.0 to 5.5.
Exploitation Mechanism
Attackers can exploit this vulnerability through DMA attacks on the shared buffer, potentially leading to privileged escalation and unauthorized access.
Mitigation and Prevention
To address CVE-2022-32470, certain immediate steps and long-term security practices are recommended.
Immediate Steps to Take
Implementing IOMMU protection for ACPI runtime memory and copying firmware block services data to SMRAM before checking can help mitigate the risk associated with this vulnerability.
Long-Term Security Practices
Regular security updates, monitoring for suspicious activities, and restricting access to sensitive areas of the system are essential security practices to prevent and detect potential attacks.
Patching and Updates
Stay informed about security advisories and patches provided by Insyde to address CVE-2022-32470 and ensure timely application of updates to protect your system.