medium
6.7
CWE
489
Advisory Published
Updated

CVE-2021-3971

First published: Fri Apr 22 2022(Updated: )

A potential vulnerability by a driver used during older manufacturing processes on some consumer Lenovo Notebook devices that was mistakenly included in the BIOS image could allow an attacker with elevated privileges to modify firmware protection region by modifying an NVRAM variable.

Credit: psirt@lenovo.com

Affected SoftwareAffected VersionHow to fix
Lenovo Ideapad 3-14ada05 Firmware<e8cn33ww
Lenovo Ideapad 3-14ada05 Firmware
Lenovo ideapad 3-14ada6 firmware<hbcn21ww
Lenovo ideapad 3-14ada6 firmware
Lenovo Ideapad 3-14ALC6<glcn43ww
Lenovo Ideapad 3-14alc6 firmware
Lenovo IdeaPad 3-14ARE05 Firmware<dzcn42ww
Lenovo IdeaPad 3-14ARE05 Firmware
Lenovo Ideapad 3<hbcn21ww
Lenovo Ideapad 3
Lenovo Ideapad 3-15ALC6 Firmware<glcn43ww
Lenovo Ideapad 3-15ALC6 Firmware
Lenovo Ideapad 3-15ARE05 Firmware<dzcn42ww
Lenovo Ideapad 3-15are05 firmware
Lenovo Ideapad 3-15IGL05 Firmware<dvcn23ww
Lenovo ideapad 3-15igl05 firmware
Lenovo Ideapad 3-17ADA05 Firmware<e8cn33ww
Lenovo Ideapad 3-17ADA05 Firmware
Lenovo Ideapad 3-17ADA6<hbcn21ww
Lenovo Ideapad 3
Lenovo Ideapad 3-17ALC6 Firmware<glcn43ww
Lenovo Ideapad 3-17ALC6 Firmware
Lenovo Ideapad 3-17are05<dzcn42ww
Lenovo Ideapad 3
Lenovo Ideapad 3-17iil05<emcn52ww
Lenovo Ideapad 3-17IIL05 Firmware
Lenovo Ideapad 3-15ada05<e8cn33ww
Lenovo Ideapad 3
Lenovo L3-15ITL6 Firmware<gfcn23ww
Lenovo Ideapad 3-15ITL6
Lenovo L340-15IRH<bgcn35ww
Lenovo L340-15IRH Firmware
Lenovo L340-15IWl Touch Firmware<atcn46ww
Lenovo L340-15IWL Touch
Lenovo L340-15IWL Touch Firmware<atcn46ww
Lenovo L340-15IWL
Lenovo L340-17IRH Firmware<bgcn35ww
Lenovo L340-17IRH Firmware
Lenovo L340-17IWL<atcn46ww
Lenovo L340-17IWL Firmware
Lenovo Legion 5 Pro 16ACH6 Firmware<hhcn25ww
Lenovo Legion 5 Pro 16ACH6H
Lenovo Legion 5 Pro 16ACH6H<gkcn51ww
Lenovo Legion 5 Pro 16ACH6H
Lenovo Legion 5 Pro 16ITH6H Firmware<h1cn46ww
Lenovo Legion 5 Pro 16ITH6
Lenovo Legion 5 Pro 16ITH6H Firmware<h1cn46ww
Lenovo Legion 5 Pro 16ITH6
Lenovo Legion 5-15ACH6A Firmware<hhcn25ww
Lenovo Legion 5-15ACH6 Firmware
Lenovo Legion 5-15ACH6 Firmware<g9cn28ww
Lenovo Legion 5-15ACH6A Firmware
Lenovo Legion 5 - 17ACH6H<gkcn51ww
Lenovo Legion 5-15ACH6H Firmware
Lenovo Legion 5 15ITH6 Firmware<h1cn46ww
Lenovo Legion 5 15ITH6 Firmware
Lenovo Legion 5 15ITH6H<h1cn46ww
Lenovo Legion 5 15ITH6H
Lenovo Legion 5-17ACH6H Firmware<hhcn25ww
Lenovo Legion 5-17ACH6 Firmware
Lenovo Legion 5-17ACH6H Firmware<gkcn51ww
Lenovo Legion 5 - 17ACH6H
Lenovo Legion 5-17ITH6H Firmware<h1cn46ww
Lenovo Legion 5
Lenovo Legion 5 Firmware<h1cn46ww
Lenovo Legion 5-17ITH6H Firmware
Lenovo Legion 7 16ACHG6 Firmware<gkcn51ww
Lenovo Legion 7 16ACHG6 Firmware
Lenovo Legion 7-16ITHG6<gkcn51ww
Lenovo Legion 7 16ITHG6 Firmware
Lenovo Legion Y540<bhcn44ww
Lenovo Legion Y540-15IRH Firmware
Lenovo Legion Y540-15IRH Firmware<bhcn44ww
Lenovo Legion Y540-15IRH
Lenovo Legion Y540-17IRH<bhcn44ww
Lenovo Legion Y540
Lenovo Legion Y540-17IRH Firmware<bhcn44ww
Lenovo Legion Y540-17IRH-PG0 Firmware
Lenovo Legion Y545 Firmware<bhcn44ww
Lenovo Legion Y545 PG0
Lenovo Legion Y545 Firmware<bhcn44ww
Lenovo Legion Y545
Lenovo Legion Y7000P 2019 Firmware<bhcn44ww
Lenovo Legion Y7000 2019
Lenovo Legion Y7000-2019 Firmware<bhcn44ww
Lenovo Legion Y7000 2019
Lenovo S145-14IGM Firmware<bucn31ww
Lenovo S145-14API
Lenovo S145-14IGM Firmware<aycn26ww
Lenovo S145-14AST
Lenovo S145-14IGM Firmware<awcn28ww
Lenovo S145-14API
Lenovo S145-14IGM Firmware<dkcn54ww
Lenovo S145-14IIL Firmware
Lenovo S145-15api Firmware<bucn31ww
Lenovo S145-15api Firmware
Lenovo S145-15AST Firmware<aycn26ww
Lenovo S145-15api Firmware
Lenovo S145-15IGM<awcn28ww
Lenovo S145
Lenovo s145-15iil<dkcn54ww
Lenovo s145-15iil firmware
Lenovo S540-13API<cxcn34ww
Lenovo S540-13API Firmware
Lenovo V14 G2 ACL Firmware<glcn43ww
Lenovo V14 G2 ACL
Lenovo v14-ada firmware<e8cn33ww
Lenovo v14-ada firmware
Lenovo v14-are firmware<dzcn42ww
Lenovo v14-are firmware
Lenovo v14-igl firmware<dvcn23ww
Lenovo v14-igl firmware
Lenovo v14-iil firmware<dkcn54ww
Lenovo v14-iil firmware
Lenovo v140-15iwl<atcn46ww
Lenovo v140-15iwl firmware
Lenovo V15 G2-ALC<glcn43ww
Lenovo v15 g2 ijl
Lenovo v15-ada firmware<e8cn33ww
Lenovo v15-ada firmware
Lenovo v15-igl firmware<dvcn23ww
Lenovo v15-igl
Lenovo v15-iil<dkcn54ww
Lenovo v15-iil firmware
Lenovo v17-iil firmware<emcn52ww
Lenovo v17-iil
Lenovo v340-17iwl<atcn46ww
Lenovo v340-17iwl firmware
Lenovo Yoga Slim 7 Pro 14ACH5 Firmware<hecn24ww
Lenovo Yoga Slim 7 Pro-14ach5
Lenovo Yoga Slim 7 Pro 14ACH5 O Firmware<hecn24ww
Lenovo Yoga Slim 7 Pro-14ach5
Lenovo Ideapad 3 14iil05 Firmware<dvcn23ww
Lenovo Ideapad 3 14iil05 Firmware
Lenovo Ideapad 3-14IGL05 Firmware<emcn52ww
Lenovo ideapad 3-14igl05 firmware
Lenovo Ideapad 3-15IIL05 Firmware<emcn52ww
Lenovo Ideapad 3 15iil05
Lenovo ideapad 5-14are05 firmware<e7cn44ww
Lenovo Ideapad 5-15are05 Firmware
Lenovo Ideapad Creator 5-15imh05 Firmware<egcn36ww
Lenovo Ideapad Creator 5-15imh05 Firmware
Lenovo Ideapad Gaming 3-15ARH05<fccn17ww
Lenovo Ideapad Gaming 3-15ARH05 Firmware
Lenovo Ideapad Gaming 3-15IMH05<egcn36ww
Lenovo Ideapad Gaming 3-15IMH05 Firmware

Remedy

Update system firmware to the version (or newer) indicated for your model in the Product Impact section of LEN-73440.

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-3971?

    The severity of CVE-2021-3971 is rated as medium risk due to potential unauthorized modifications to firmware protection regions.

  • What devices are affected by CVE-2021-3971?

    CVE-2021-3971 affects multiple Lenovo IdeaPad notebook models, specifically those with certain firmware versions.

  • How do I fix CVE-2021-3971?

    To fix CVE-2021-3971, users should update their firmware to the latest version provided by Lenovo that addresses this vulnerability.

  • Can CVE-2021-3971 be exploited remotely?

    CVE-2021-3971 requires elevated privileges, meaning an attacker would need physical access to the device to exploit this vulnerability.

  • What impact does CVE-2021-3971 have on users?

    Exploitation of CVE-2021-3971 could compromise the integrity of firmware, potentially allowing malicious modifications to the system.

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