CVE-2022-32473 : Security Advisory and Response
Learn about CVE-2022-32473 affecting Insyde InsydeH2O firmware, involving DMA attacks, TOCTOU race conditions, SMRAM corruption, and privilege escalation. Find mitigation steps and more.
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5, where DMA attacks on the HddPassword shared buffer could lead to TOCTOU race-condition issues, corruption of SMRAM, and privilege escalation.
Understanding CVE-2022-32473
This article provides insights into the CVE-2022-32473 vulnerability affecting Insyde InsydeH2O firmware.
What is CVE-2022-32473?
The CVE-2022-32473 vulnerability involves DMA attacks on the HddPassword shared buffer in Insyde InsydeH2O firmware, leading to potential privilege escalation.
The Impact of CVE-2022-32473
The vulnerability could result in TOCTOU race-condition issues that allow attackers to corrupt SMRAM and escalate their privileges on the affected systems.
Technical Details of CVE-2022-32473
Find more technical information about the CVE-2022-32473 vulnerability in this section.
Vulnerability Description
The vulnerability arises from DMA attacks on the HddPassword shared buffer, creating opportunities for attackers to escalate privileges and manipulate system memory.
Affected Systems and Versions
All systems running Insyde InsydeH2O firmware with kernel versions 5.0 through 5.5 are susceptible to this vulnerability.
Exploitation Mechanism
Attackers exploit the vulnerable shared buffer to conduct DMA attacks, causing TOCTOU race-condition issues and potentially corrupting SMRAM.
Mitigation and Prevention
Discover the steps to mitigate and prevent CVE-2022-32473 vulnerability in this section.
Immediate Steps to Take
Mitigate the vulnerability by employing IOMMU protection for the ACPI runtime memory and copying firmware block services data to SMRAM before validation.
Long-Term Security Practices
Implement robust access controls, regular security audits, and firmware updates to enhance the overall security posture of the systems.
Patching and Updates
Stay updated with security patches provided by Insyde to address the CVE-2022-32473 vulnerability and enhance the security of the affected systems.