CVE-2021-3970: Input Validation
Published Apr 22, 2022
·Updated
A potential vulnerability in LenovoVariable SMI Handler due to insufficient validation in some Lenovo Notebook models BIOS may allow an attacker with local access and elevated privileges to execute arbitrary code.
Affected Software
210 affected components
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 3-17itl6 Firmware<ggcn33ww
Lenovo Ideapad 3-17itl6
Lenovo Ideapad 3-15ada05 Firmware<e8cn33ww
Lenovo Ideapad 3-15ada05
Lenovo L3 15iml05 Firmware<ejcn27ww
Lenovo L3 15iml05
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 5-15imh6 Firmware<g8cn19ww
Lenovo Legion 5-15imh6
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 S7-15ach6 Firmware<hacn35ww
Lenovo Legion S7-15ach6
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 S14 G2 Itl Firmware<ggcn33ww
Lenovo S14 G2 Itl
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 S540-13iml Firmware
Lenovo S540-13iml
Lenovo Slim 7 Pro-14ihu5 Firmware
Lenovo Slim 7 Pro-14ihu5
Lenovo Slim 9-14itl05 Firmware
Lenovo Slim 9-14itl05
Lenovo V14 G1-iml Firmware<dxcn41ww
Lenovo V14 G1-iml
Lenovo V14 G2-acl Firmware<glcn43ww
Lenovo V14 G2-acl
Lenovo V14 G2-itl Firmware<ggcn33ww
Lenovo V14 G2-itl
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 G1-iml Firmware<dxcn41ww
Lenovo V15 G1-iml
Lenovo V15 G2-alc Firmware<glcn43ww
Lenovo V15 G2-alc
Lenovo V15 G2-itl Firmware<ggcn33ww
Lenovo V15 G2-itl
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 G2-itl Firmware<ggcn33ww
Lenovo V17 G2-itl
Lenovo V17-iil Firmware<emcn52ww
Lenovo V17-iil
Lenovo V340-17iwl Firmware<atcn46ww
Lenovo V340-17iwl
Lenovo Yoga 7-14acn6 Firmware<h9cn26ww
Lenovo Yoga 7-14acn6
Lenovo Yoga C740-14iml Firmware<bncn44ww
Lenovo Yoga C740-14iml
Lenovo Yoga C740-15iml Firmware<bncn44ww
Lenovo Yoga C740-15iml
Lenovo Yoga C940-14iil Firmware
Lenovo Yoga C940-14iil
Lenovo Yoga Slim 7 Pro-14ach5 D Firmware<hecn24ww
Lenovo Yoga Slim 7 Pro-14ach5 D
Lenovo Yoga Slim 7 Pro-14ach5 Firmware<gzcn27ww
Lenovo Yoga Slim 7 Pro-14ach5
Lenovo Yoga Slim 7 Pro-14ach5 O Firmware<gzcn27ww
Lenovo Yoga Slim 7 Pro-14ach5 O
Lenovo Yoga Slim 7 Pro-14ach5 Od Firmware<hecn24ww
Lenovo Yoga Slim 7 Pro-14ach5 Od
Lenovo Yoga Slim 7 Pro-14arh5 Firmware<g7cn21ww
Lenovo Yoga Slim 7 Pro-14arh5
Lenovo Yoga Slim 7 Pro-14ihu5 Firmware
Lenovo Yoga Slim 7 Pro-14ihu5
Lenovo Yoga Slim 7 Pro-14ihu5 O Firmware
Lenovo Yoga Slim 7 Pro-14ihu5 O
Lenovo Yoga Slim 7 Pro-14itl5 Firmware
Lenovo Yoga Slim 7 Pro-14itl5
Lenovo Yoga Slim 9-14itl05 Firmware
Lenovo Yoga Slim 9-14itl05
Lenovo Ideapad 3-14iil05 Firmware<dvcn23ww
Lenovo Ideapad 3-14iil05
Lenovo Ideapad 3-14igl05 Firmware<emcn52ww
Lenovo Ideapad 3-14igl05
Lenovo Ideapad 3-14iml05 Firmware<dxcn41ww
Lenovo Ideapad 3-14iml05
Lenovo Ideapad 3-14itl05 Firmware<gccn26ww
Lenovo Ideapad 3-14itl05
Lenovo Ideapad 3-14itl6 Firmware<ggcn33ww
Lenovo Ideapad 3-14itl6
Lenovo Ideapad 3-15iil05 Firmware<emcn52ww
Lenovo Ideapad 3-15iil05
Lenovo Ideapad 3-15iml05 Firmware<dxcn41ww
Lenovo Ideapad 3-15iml05
Lenovo Ideapad 3-15itl05 Firmware<gccn26ww
Lenovo Ideapad 3-15itl05
Lenovo Ideapad 3-15itl6 Firmware<ggcn33ww
Lenovo Ideapad 3-15itl6
Lenovo Ideapad 3-17iml05 Firmware<dxcn41ww
Lenovo Ideapad 3-17iml05
Lenovo Ideapad 5-15are05 Firmware<e7cn44ww
Lenovo Ideapad 5-15are05
Lenovo Ideapad 5-15iil05 Firmware<dpcn54ww
Lenovo Ideapad 5-15iil05
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
Remediation
Information
Update system firmware to the version (or newer) indicated for your model in the Product Impact section of LEN-73440.
Event History
Apr 22, 2022
CVE Published
via MITRE·08:30 PM
Data Sourced
via MITRE·08:30 PM
RemedyDescriptionSeverityWeakness
Frequently Asked Questions
1
What is the severity of CVE-2021-3970?
The severity of CVE-2021-3970 is classified as high due to its potential to allow arbitrary code execution with local access.
2
How do I fix CVE-2021-3970?
To fix CVE-2021-3970, users should update the BIOS on affected Lenovo Notebook models to the latest version provided by Lenovo.
3
Which Lenovo models are affected by CVE-2021-3970?
CVE-2021-3970 affects various Lenovo ideapad models such as the 3-14ADA05, 3-14ADA6, and others specified in the security advisory.
4
What are the risks associated with CVE-2021-3970?
The risks associated with CVE-2021-3970 include potential unauthorized access and control over the affected system, posing a significant security threat.
5
Is local access required to exploit CVE-2021-3970?
Yes, local access is required to exploit CVE-2021-3970, making it a targeted risk mainly for environments with unauthorized physical access.