CVE-2022-35897 : Vulnerability Insights and Analysis

A stack buffer overflow vulnerability leading to arbitrary code execution has been identified in Insyde InsydeH2O with kernel versions 5.0 through 5.5. This CVE allows attackers to execute arbitrary code by modifying specific UEFI variables.

Understanding CVE-2022-35897

This section delves into the details of the CVE-2022-35897 vulnerability.

What is CVE-2022-35897?

The CVE-2022-35897 involves a stack buffer overflow vulnerability in Insyde InsydeH2O, allowing attackers to execute arbitrary code by altering specific UEFI variables. These variables are typically read-only at the OS level, necessitating direct SPI modification for an attack.

The Impact of CVE-2022-35897

The impact of this CVE is severe as it enables threat actors to exploit the vulnerability and execute arbitrary code, potentially leading to unauthorized access and system compromise.

Technical Details of CVE-2022-35897

This section provides technical insights into the CVE-2022-35897 vulnerability.

Vulnerability Description

The vulnerability arises from a stack buffer overflow in Insyde InsydeH2O, affecting kernel versions 5.0 through 5.5. Attackers can trigger arbitrary code execution by manipulating specific UEFI variables.

Affected Systems and Versions

The vulnerability affects systems running Insyde InsydeH2O with kernel versions 5.0 through 5.5. Users of these systems are at risk of arbitrary code execution due to the identified stack buffer overflow.

Exploitation Mechanism

To exploit CVE-2022-35897, an attacker must modify specific UEFI variables related to SecureBootEnforce, SecureBoot, and RestoreBootSettings. By altering these values, the attacker can induce a stack overflow and execute malicious code.

Mitigation and Prevention

This section outlines steps to mitigate the CVE-2022-35897 vulnerability.

Immediate Steps to Take

Users are advised to apply security updates and patches provided by Insyde for Insyde InsydeH2O. Additionally, restricting physical access to the UEFI firmware can help prevent unauthorized modifications.

Long-Term Security Practices

Implementing secure boot mechanisms, regularly updating firmware, and monitoring UEFI variables for unauthorized changes are vital for long-term security against stack buffer overflow vulnerabilities.

Patching and Updates

Regularly check for firmware updates and security advisories from Insyde, ensuring that the latest patches are applied promptly to mitigate the risk of arbitrary code execution.