CVE-2022-32475 : What You Need to Know

This article provides detailed information about CVE-2022-32475, a security issue discovered in Insyde InsydeH2O with kernel 5.0 through 5.5 that could lead to privilege escalation.

Understanding CVE-2022-32475

In this section, we will delve into the specifics of CVE-2022-32475.

What is CVE-2022-32475?

The issue found in Insyde InsydeH2O with kernel 5.0 through 5.5 involves DMA attacks on the VariableRuntimeDxe shared buffer, potentially leading to TOCTOU race-condition problems, corruption of SMRAM, and privilege escalation by attackers.

The Impact of CVE-2022-32475

The vulnerability could result in the compromise of SMRAM integrity, enabling attackers to escalate their privileges on affected systems.

Technical Details of CVE-2022-32475

This section will cover the technical aspects of CVE-2022-32475.

Vulnerability Description

The vulnerability allows DMA attacks on the VariableRuntimeDxe shared buffer used by SMM and non-SMM code, potentially leading to TOCTOU race-condition issues and SMRAM corruption.

Affected Systems and Versions

The issue impacts systems running Insyde InsydeH2O with kernel versions 5.0 through 5.5.

Exploitation Mechanism

Attackers can exploit DMA attacks on the shared buffer to manipulate SMRAM contents and escalate their privileges on the targeted system.

Mitigation and Prevention

In this section, we will discuss steps to mitigate and prevent CVE-2022-32475.

Immediate Steps to Take

Users are advised to apply the kernel fix that addresses the vulnerability and protects chipset and OEM chipset code from potential exploitation.

Long-Term Security Practices

Enforcing secure coding practices, regular security assessments, and staying updated on security patches can enhance overall system security.

Patching and Updates

Keeping systems up to date with security patches and fixes provided by the vendor is crucial in mitigating security risks.