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
Lenovo Ideapad 3-14ada6 Firmware<hbcn21ww
Lenovo Ideapad 3-14ada6
Lenovo Ideapad 3-14alc6 Firmware<glcn43ww
Lenovo Ideapad 3-14alc6
Lenovo Ideapad 3-14are05 Firmware<dzcn42ww
Lenovo Ideapad 3-14are05
Lenovo Ideapad 3-15ada6 Firmware<hbcn21ww
Lenovo Ideapad 3-15ada6
Lenovo Ideapad 3-15alc6 Firmware<glcn43ww
Lenovo Ideapad 3-15alc6
Lenovo Ideapad 3-15are05 Firmware<dzcn42ww
Lenovo Ideapad 3-15are05
Lenovo Ideapad 3-15igl05 Firmware<dvcn23ww
Lenovo Ideapad 3-15igl05
Lenovo Ideapad 3-17ada05 Firmware<e8cn33ww
Lenovo Ideapad 3-17ada05
Lenovo Ideapad 3-17ada6 Firmware<hbcn21ww
Lenovo Ideapad 3-17ada6
Lenovo Ideapad 3-17alc6 Firmware<glcn43ww
Lenovo Ideapad 3-17alc6
Lenovo Ideapad 3-17are05 Firmware<dzcn42ww
Lenovo Ideapad 3-17are05
Lenovo Ideapad 3-17iil05 Firmware<emcn52ww
Lenovo Ideapad 3-17iil05
Lenovo Ideapad 3-15ada05 Firmware<e8cn33ww
Lenovo Ideapad 3-15ada05
Lenovo L3-15itl6 Firmware<gfcn23ww
Lenovo L3-15itl6
Lenovo L340-15irh Firmware<bgcn35ww
Lenovo L340-15irh
Lenovo L340-15iwl Firmware<atcn46ww
Lenovo L340-15iwl
Lenovo L340-15iwl Touch Firmware<atcn46ww
Lenovo L340-15iwl Touch
Lenovo L340-17irh Firmware<bgcn35ww
Lenovo L340-17irh
Lenovo L340-17iwl Firmware<atcn46ww
Lenovo L340-17iwl
Lenovo Legion 5 Pro-16ach6 Firmware<hhcn25ww
Lenovo Legion 5 Pro-16ach6
Lenovo Legion 5 Pro-16ach6h Firmware<gkcn51ww
Lenovo Legion 5 Pro-16ach6h
Lenovo Legion 5 Pro-16ith6 Firmware<h1cn46ww
Lenovo Legion 5 Pro-16ith6
Lenovo Legion 5 Pro-16ith6h Firmware<h1cn46ww
Lenovo Legion 5 Pro-16ith6h
Lenovo Legion 5-15ach6 Firmware<hhcn25ww
Lenovo Legion 5-15ach6
Lenovo Legion 5-15ach6a Firmware<g9cn28ww
Lenovo Legion 5-15ach6a
Lenovo Legion 5-15ach6h Firmware<gkcn51ww
Lenovo Legion 5-15ach6h
Lenovo Legion 5-15ith6 Firmware<h1cn46ww
Lenovo Legion 5-15ith6
Lenovo Legion 5-15ith6h Firmware<h1cn46ww
Lenovo Legion 5-15ith6h
Lenovo Legion 5-17ach6 Firmware<hhcn25ww
Lenovo Legion 5-17ach6
Lenovo Legion 5-17ach6h Firmware<gkcn51ww
Lenovo Legion 5-17ach6h
Lenovo Legion 5-17ith6 Firmware<h1cn46ww
Lenovo Legion 5-17ith6
Lenovo Legion 5-17ith6h Firmware<h1cn46ww
Lenovo Legion 5-17ith6h
Lenovo Legion 7-16achg6 Firmware<gkcn51ww
Lenovo Legion 7-16achg6
Lenovo Legion 7-16ithg6 Firmware<gkcn51ww
Lenovo Legion 7-16ithg6
Lenovo Legion Y540-15irh Firmware<bhcn44ww
Lenovo Legion Y540-15irh
Lenovo Legion Y540-15irh-pg0 Firmware<bhcn44ww
Lenovo Legion Y540-15irh-pg0
Lenovo Legion Y540-17irh Firmware<bhcn44ww
Lenovo Legion Y540-17irh
Lenovo Legion Y540-17irh-pg0 Firmware<bhcn44ww
Lenovo Legion Y540-17irh-pg0
Lenovo Legion Y545 Firmware<bhcn44ww
Lenovo Legion Y545
Lenovo Legion Y545-pg0 Firmware<bhcn44ww
Lenovo Legion Y545-pg0
Lenovo Legion Y7000-2019 Firmware<bhcn44ww
Lenovo Legion Y7000-2019
Lenovo Legion Y7000-2019-pg0 Firmware<bhcn44ww
Lenovo Legion Y7000-2019-pg0
Lenovo S145-14api Firmware<bucn31ww
Lenovo S145-14api
Lenovo S145-14ast Firmware<aycn26ww
Lenovo S145-14ast
Lenovo S145-14igm Firmware<awcn28ww
Lenovo S145-14igm
Lenovo S145-14iil Firmware<dkcn54ww
Lenovo S145-14iil
Lenovo S145-15api Firmware<bucn31ww
Lenovo S145-15api
Lenovo S145-15ast Firmware<aycn26ww
Lenovo S145-15ast
Lenovo S145-15igm Firmware<awcn28ww
Lenovo S145-15igm
Lenovo S145-15iil Firmware<dkcn54ww
Lenovo S145-15iil
Lenovo S540-13api Firmware<cxcn34ww
Lenovo S540-13api
Lenovo V14 G2-acl Firmware<glcn43ww
Lenovo V14 G2-acl
Lenovo V14-ada Firmware<e8cn33ww
Lenovo V14-ada
Lenovo V14-are Firmware<dzcn42ww
Lenovo V14-are
Lenovo V14-igl Firmware<dvcn23ww
Lenovo V14-igl
Lenovo V14-iil Firmware<dkcn54ww
Lenovo V14-iil
Lenovo V140-15iwl Firmware<atcn46ww
Lenovo V140-15iwl
Lenovo V15 G2-alc Firmware<glcn43ww
Lenovo V15 G2-alc
Lenovo V15-ada Firmware<e8cn33ww
Lenovo V15-ada
Lenovo V15-igl Firmware<dvcn23ww
Lenovo V15-igl
Lenovo V15-iil Firmware<dkcn54ww
Lenovo V15-iil
Lenovo V17-iil Firmware<emcn52ww
Lenovo V17-iil
Lenovo V340-17iwl Firmware<atcn46ww
Lenovo V340-17iwl
Lenovo Yoga Slim 7 Pro-14ach5 D Firmware<hecn24ww
Lenovo Yoga Slim 7 Pro-14ach5 D
Lenovo Yoga Slim 7 Pro-14ach5 Od Firmware<hecn24ww
Lenovo Yoga Slim 7 Pro-14ach5 Od
Lenovo Ideapad 3-14iil05 Firmware<dvcn23ww
Lenovo Ideapad 3-14iil05
Lenovo Ideapad 3-14igl05 Firmware<emcn52ww
Lenovo Ideapad 3-14igl05
Lenovo Ideapad 3-15iil05 Firmware<emcn52ww
Lenovo Ideapad 3-15iil05
Lenovo Ideapad 5-15are05 Firmware<e7cn44ww
Lenovo Ideapad 5-15are05
Lenovo Ideapad Creator 5-15imh05 Firmware<egcn36ww
Lenovo Ideapad Creator 5-15imh05
Lenovo Ideapad Gaming 3-15arh05 Firmware<fccn17ww
Lenovo Ideapad Gaming 3-15arh05
Lenovo Ideapad Gaming 3-15imh05 Firmware<egcn36ww
Lenovo Ideapad Gaming 3-15imh05

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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