CVE-2021-4210 : What You Need to Know

A potential vulnerability in the SMI callback function used in the NVME driver in some Lenovo Desktop, ThinkStation, and ThinkEdge models may allow an attacker with local access and elevated privileges to execute arbitrary code.

Understanding CVE-2021-4210

This CVE affects Lenovo devices due to a vulnerability in the NVME driver's SMI callback function.

What is CVE-2021-4210?

CVE-2021-4210 is a vulnerability in the NVME driver on select Lenovo devices that could be exploited by a local attacker with elevated privileges to run arbitrary code.

The Impact of CVE-2021-4210

The vulnerability poses a medium-severity risk with high impacts on confidentiality, integrity, and availability, requiring elevated privileges and local access for exploitation.

Technical Details of CVE-2021-4210

The vulnerability is categorized under CWE-20 (Improper Input Validation) and has a CVSSv3.1 base score of 6.7 (Medium severity).

Vulnerability Description

The flaw allows a local attacker with elevated privileges to execute arbitrary code via the SMI callback function in the NVME driver.

Affected Systems and Versions

Lenovo Desktop, ThinkStation, and ThinkEdge models with various BIOS versions are impacted.

Exploitation Mechanism

The vulnerability can be exploited by a threat actor with local access and elevated privileges.

Mitigation and Prevention

To address CVE-2021-4210, Lenovo recommends updating system firmware to the version indicated for the affected model in the LEN-77639 Product Impact section.

Immediate Steps to Take

Immediately apply the recommended firmware update to mitigate the risk of exploitation.

Long-Term Security Practices

Regularly check for firmware updates and security advisories from Lenovo to stay protected against potential vulnerabilities.

Patching and Updates

Stay updated on security patches and apply them promptly to ensure the security of your Lenovo devices.