medium
6.7
CWE
489
Advisory Published
Updated

CVE-2021-3972

First published: Fri Apr 22 2022(Updated: )

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

Credit: psirt@lenovo.com

Affected SoftwareAffected VersionHow to fix
Lenovo Ideapad 1-14ada05<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
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 3-14ada6 firmware<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 3-17ITL6<ggcn33ww
Lenovo Ideapad 3-17itl6 Firmware
Lenovo Ideapad 3 15 Firmware<e8cn33ww
Lenovo Ideapad 3 15 Firmware
Lenovo IdeaPad L3 15IML05<ejcn27ww
Lenovo IdeaPad L3 15IML05
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<atcn46ww
Lenovo L340-15IWL Touch Firmware
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 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 Firmware<g8cn19ww
Lenovo Legion 5-15IMH6 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
Lenovo Legion S7-15ACH6<hacn35ww
Lenovo Legion S7-15ACH6 Firmware
Lenovo Legion Y540 Firmware<bhcn44ww
Lenovo Legion Y540
Lenovo Legion Y540-15IRH Firmware<bhcn44ww
Lenovo Legion Y540-15IRH
Lenovo Legion Y540-17IRH-PG0 Firmware<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 PG0 Firmware<bhcn44ww
Lenovo Legion Y7000 2019
Lenovo Legion Y7000-2019 Firmware<bhcn44ww
Lenovo Legion Y7000 2019
Lenovo S14 G2 ITL<ggcn33ww
Lenovo S14 G2 ITL Firmware
Lenovo S145-14IGM Firmware<bucn31ww
Lenovo S145-14ast
Lenovo S145-14IGM Firmware<aycn26ww
Lenovo S145
Lenovo S145-14IGM Firmware<awcn28ww
Lenovo S145-14API
Lenovo S145<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
Lenovo S540-13API<cxcn34ww
Lenovo S540-13API Firmware
Lenovo S540-13IML
Lenovo S540-13ITL
Lenovo Slim 7 Pro 14IHU5 Firmware
Lenovo Slim 7 Pro 14IHU5 Firmware
Lenovo Yoga Slim 9-14ITL05 Firmware
Lenovo Yoga Slim 9-14ITL05
Lenovo v14 g1-iml<dxcn41ww
Lenovo v14 G1-IML
Lenovo V14 G2 ACL Firmware<glcn43ww
Lenovo V14 G2 ACL
Lenovo V14 G2 ITL<ggcn33ww
Lenovo V14 G2 ITL
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
Lenovo v15 G1-IML Firmware<dxcn41ww
Lenovo v15 G1-IML Firmware
Lenovo V15 G2-ALC<glcn43ww
Lenovo v15 g2 ijl
Lenovo v15 G2 ITL Firmware<ggcn33ww
Lenovo v15 g2-itl firmware
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 G2 ITL Firmware<ggcn33ww
Lenovo V17 G2 ITL
Lenovo v17-iil firmware<emcn52ww
Lenovo v17-iil
Lenovo v340-17iwl<atcn46ww
Lenovo v340-17iwl firmware
Lenovo Yoga 7-14ACN6 Firmware<h9cn26ww
Lenovo Yoga 7-14ACN6 Firmware
Lenovo Yoga C740-14IML<bncn44ww
Lenovo Yoga C740-14IML Firmware
Lenovo Yoga C740-15IML<bncn44ww
Lenovo Yoga C740-15IML Firmware
Lenovo Yoga C940 Firmware
Lenovo Yoga C940 Firmware
Lenovo Yoga Slim 7 Pro<hecn24ww
Lenovo Yoga Slim 7 Pro-14ach5
Lenovo Yoga Slim 7 Pro 14ACH5 Firmware<gzcn27ww
Lenovo Yoga Slim 7 Pro
Lenovo Yoga Slim 7 Pro 14ACH5 O Firmware<gzcn27ww
Lenovo Yoga Slim 7 Pro-14ach5
Lenovo Yoga Slim 7 Pro 14ACH5 O Firmware<hecn24ww
Lenovo Yoga Slim 7 Pro-14ach5
Lenovo Yoga Slim 7 Pro 14ARH5 Firmware<g7cn21ww
Lenovo Yoga Slim 7 Pro
Lenovo Yoga Slim 7 Pro 14IHU5 Firmware
Lenovo Slim 7 Pro 14IHU5 Firmware
Lenovo Yoga Slim 7 Pro 14IHU5 Firmware
Lenovo Slim 7 Pro 14IHU5 Firmware
Lenovo Yoga Slim 7 Pro 14ITL5 Firmware
Lenovo Yoga Slim 7 Pro 14ITL5
Lenovo Yoga Slim 9 14IAP7 Firmware
Lenovo Slim 9 14ITL05 Firmware
Lenovo Ideapad 3 14iil05 Firmware<dvcn23ww
Lenovo Ideapad 3 14iil05 Firmware
Lenovo Ideapad 3-14IGL05 Firmware<emcn52ww
Lenovo ideapad 3-14igl05 firmware
Lenovo ideapad 3-14iml05<dxcn41ww
Lenovo Ideapad 3 14
Lenovo Ideapad 3-14itl6 firmware<gccn26ww
Lenovo ideapad 3-14itl6
Lenovo Ideapad 3-14ITL6<ggcn33ww
Lenovo Ideapad 3 14
Lenovo Ideapad 3 15 Firmware<emcn52ww
Lenovo Ideapad 3 15iil05
Lenovo L3 15IML05 Firmware<dxcn41ww
Lenovo L3 15IML05 Firmware
Lenovo Ideapad 3 15 Firmware<gccn26ww
Lenovo Ideapad 3-15itl05
Lenovo Ideapad 3-15ITL6<ggcn33ww
Lenovo Ideapad 3
Lenovo ideapad 3 17IML05 firmware<dxcn41ww
Lenovo Ideapad 3 17IML05 firmware
Lenovo ideapad 5-14are05 firmware<e7cn44ww
Lenovo Ideapad 5-15are05 Firmware
Lenovo Ideapad 5-15iil05<dpcn54ww
Lenovo Ideapad 5-15iil05
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-2021-3972?

    CVE-2021-3972 is classified as a high severity vulnerability.

  • How do I fix CVE-2021-3972?

    To fix CVE-2021-3972, update the firmware for affected Lenovo Ideapad models to the latest version as specified by Lenovo.

  • What devices are affected by CVE-2021-3972?

    CVE-2021-3972 affects certain models of Lenovo Ideapad notebooks including 3-14ADA05, 3-14ADA6, and 3-15ADA6 among others.

  • What kind of attack can exploit CVE-2021-3972?

    An attacker with elevated privileges can exploit CVE-2021-3972 to modify the secure boot setting by altering an NVRAM variable.

  • When was CVE-2021-3972 discovered?

    CVE-2021-3972 was discovered in 2021 and reported as part of Lenovo's ongoing product security efforts.

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