Lenovo Security Advisory: LEN-94952

Potential Impact: Disable Secure Boot

Severity: High

Scope of Impact: Lenovo-specific

CVE Identifier: CVE-2022-3430, CVE-2022-3431, CVE-2022-3432

Summary Description:

The following vulnerabilities were reported in Lenovo Notebook BIOS.

CVE-2022-3430: A potential vulnerability in the WMI Setup driver on some consumer Lenovo Notebook devices may allow an attacker with elevated privileges to modify secure boot setting by modifying an NVRAM variable.

CVE-2022-3431: A potential vulnerability in a driver used during manufacturing process on some consumer Lenovo Notebook devices that was mistakenly not deactivated may allow an attacker with elevated privileges to modify secure boot setting by modifying an NVRAM variable.

CVE-2022-3432: A potential vulnerability in a driver used during manufacturing process on the Ideapad Y700-14ISK that was mistakenly not deactivated may allow an attacker with elevated privileges to modify secure boot setting by modifying an NVRAM variable.

Mitigation Strategy for Customers (what you should do to protect yourself):

For CVE-2022-3430 and CVE-2022-3431, update system firmware to the version (or newer) indicated for your model in the product Impact section.

For CVE-2022-3432, the Ideapad Y700-14ISK has reached end of development support and no fixes will be released. Lenovo recommends customers adopt secure computing practices, including active system lifecycle management.

Product Impact:

To download the version specified for your product below, follow these steps:

Navigate to the Drivers & Software support site for your product:

• Lenovo Products (sold worldwide, except in China): https://support.lenovo.com/
• Lenovo Products (sold in China): https://newsupport.lenovo.com.cn/
• IBM-branded System x Legacy Products: https://www.ibm.com/support/fixcentral/

1. Search for your product by name or machine type.
2. Click Drivers & Software on the left menu panel.
3. Click on Manual Update to browse by Component type.
4. Compare the minimum fix version for your product from the applicable product table below with the latest version posted on the support site.

Lenovo also offers tools to assist with update management as an alternative to the manual steps described above. Refer to the following for additional help:

PC Products and Software: https://support.lenovo.com/us/en/solutions/ht504759

Server and Enterprise Software: https://support.lenovo.com/us/en/solutions/lnvo-lxcaupd and https://datacentersupport.lenovo.com/us/en/documents/lnvo-center

Click below links to view affected products:

Lenovo Notebook

Acknowledgement:

Lenovo thanks Martin Smolár from ESET for reporting these issues.

Revision History:

For a complete list of all Lenovo Product Security Advisories, click here.

For the most up to date information, please remain current with updates and advisories from Lenovo regarding your equipment and software. The information provided in this advisory is provided on an “as is” basis without any warranty or guarantee of any kind. Lenovo reserves the right to change or update this advisory at any time.

Product Impact:

Lenovo Notebook