CVE-2022-1107 : Vulnerability Insights and Analysis

This article provides detailed information about CVE-2022-1107, a vulnerability found in ThinkPad BIOS that could be exploited by an attacker with elevated privileges. It includes the impact, affected systems, technical details, and mitigation steps.

Understanding CVE-2022-1107

CVE-2022-1107 is a vulnerability discovered during an internal product security audit in some ThinkPad models. It involves the use of Boot Services in the SmmOEMInt15 SMI handler, allowing an attacker with elevated privileges to execute malicious code.

What is CVE-2022-1107?

CVE-2022-1107 is a medium-severity vulnerability affecting ThinkPad BIOS in various Lenovo models. It could enable an attacker to execute arbitrary code by exploiting the SMM handler vulnerability.

The Impact of CVE-2022-1107

The vulnerability poses a high risk to confidentiality, integrity, and availability. An attacker with elevated privileges can exploit this issue, leading to unauthorized code execution and potential system compromise.

Technical Details of CVE-2022-1107

Vulnerability Description

The vulnerability stems from improper input validation in the SmmOEMInt15 SMI handler, allowing attackers to execute arbitrary code with elevated privileges.

Affected Systems and Versions

ThinkPad BIOS in various Lenovo systems is affected by CVE-2022-1107 due to the vulnerable SmmOEMInt15 SMI handler.

Exploitation Mechanism

Attackers with elevated privileges can exploit this vulnerability by leveraging the Boot Services in the SmmOEMInt15 SMI handler to execute malicious code.

Mitigation and Prevention

Immediate Steps to Take

Users are advised to update their system firmware to the version specified in the Lenovo advisory LEN-84943 to mitigate the CVE-2022-1107 vulnerability.

Long-Term Security Practices

In addition to applying the recommended firmware update, users should follow best security practices, such as regular system updates, network segmentation, and user privilege management.

Patching and Updates

Lenovo has provided a solution to address CVE-2022-1107. Users should ensure that their systems are running the recommended firmware version or newer to prevent exploitation of this vulnerability.