CVE-2022-32477 : Vulnerability Insights and Analysis

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Learn about the impact, technical details, and mitigation strategies for this CVE.

Understanding CVE-2022-32477

A vulnerability in Insyde InsydeH2O with kernel 5.0 through 5.5 can lead to privilege escalation and corruption of SMRAM.

What is CVE-2022-32477?

CVE-2022-32477 is a security vulnerability in Insyde InsydeH2O that could allow DMA attacks on the FvbServicesRuntimeDxe shared buffer, leading to TOCTOU race-condition issues.

The Impact of CVE-2022-32477

Exploiting this vulnerability could result in the corruption of SMRAM and the escalation of privileges, posing a significant security risk.

Technical Details of CVE-2022-32477

This section delves into the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability allows DMA attacks on the shared buffer, potentially leading to TOCTOU race-condition issues affecting the integrity of SMRAM.

Affected Systems and Versions

All systems running Insyde InsydeH2O with kernel versions 5.0 through 5.5 are susceptible to this vulnerability.

Exploitation Mechanism

Attackers could exploit the vulnerability to corrupt SMRAM and escalate privileges through DMA attacks on the FvbServicesRuntimeDxe shared buffer.

Mitigation and Prevention

Discover immediate steps to take and long-term security practices to mitigate the risks posed by CVE-2022-32477.

Immediate Steps to Take

Mitigate this vulnerability by using IOMMU protection for the ACPI runtime memory and copying firmware block services data to SMRAM before verification.

Long-Term Security Practices

Enhance system security by implementing secure coding practices, regular security audits, and employee security awareness training.

Patching and Updates

Stay vigilant for security patches and updates from Insyde that address CVE-2022-32477 to ensure ongoing protection.