CVE-2022-35895 : What You Need to Know

An issue was discovered in Insyde InsydeH2O with kernel versions 5.0 through 5.5, where the FwBlockSericceSmm driver fails to properly validate input parameters for a software SMI routine. This vulnerability can lead to memory corruption of arbitrary addresses, including SMRAM, and potentially allow for arbitrary code execution.

Understanding CVE-2022-35895

This section delves into the details of the CVE-2022-35895 vulnerability.

What is CVE-2022-35895?

The vulnerability in Insyde InsydeH2O affects kernel versions 5.0 through 5.5, allowing for memory corruption and potential arbitrary code execution due to improper parameter validation in the FwBlockSericceSmm driver.

The Impact of CVE-2022-35895

The impact of this vulnerability is severe as it can lead to unauthorized memory access and the execution of arbitrary code, posing a significant threat to system integrity and data security.

Technical Details of CVE-2022-35895

This section provides in-depth technical insights into CVE-2022-35895.

Vulnerability Description

The vulnerability arises from the inadequate validation of input parameters for a software SMI routine in the FwBlockSericceSmm driver, resulting in memory corruption that can be exploited for arbitrary code execution.

Affected Systems and Versions

Systems running Insyde InsydeH2O with kernel versions 5.0 through 5.5 are affected by this vulnerability. Users of these systems are at risk of memory corruption and potential code execution attacks.

Exploitation Mechanism

Attackers can exploit this vulnerability by providing malicious input parameters to the FwBlockSericceSmm driver, triggering memory corruption of arbitrary addresses, including SMRAM, and enabling the execution of unauthorized code.

Mitigation and Prevention

This section outlines measures to mitigate and prevent the exploitation of CVE-2022-35895.

Immediate Steps to Take

Users and administrators should apply security patches provided by the vendor promptly. Additionally, restricting access to vulnerable systems and implementing firewall rules can help reduce the risk of exploitation.

Long-Term Security Practices

Implementing secure coding practices, conducting regular security audits, and staying informed about the latest security advisories can enhance long-term security posture.

Patching and Updates

Regularly updating the Insyde InsydeH2O firmware to the latest version that includes patches for CVE-2022-35895 is crucial to address the vulnerability and safeguard system integrity.