high
7.2
CWE
20
Advisory Published
Updated

CVE-2021-3843: Input Validation

First published: Fri Nov 12 2021(Updated: )

A potential vulnerability in the SMI function to access EEPROM in some ThinkPad models may allow an attacker with local access and elevated privileges to execute arbitrary code.

Credit: psirt@lenovo.com

Affected SoftwareAffected VersionHow to fix
Lenovo Thinkpad 11e 3rd Gen Firmware<=1.22
Lenovo Thinkpad 11e 3rd Gen
Lenovo Thinkpad 11e 3rd Gen Firmware<=1.29
Lenovo Thinkpad 11e 4th Gen I3 Firmware<=1.22
Lenovo Thinkpad 11e 4th Gen I3
Lenovo Thinkpad 11e 4th Gen I7 Firmware<=1.22
Lenovo Thinkpad 11e 4th Gen I7
Lenovo Thinkpad 11e 4th Gen I5 Firmware<=1.22
Lenovo Thinkpad 11e 4th Gen I5
Lenovo Thinkpad 11e 4th Gen Celeron Firmware<=1.27
Lenovo Thinkpad 11e 4th Gen Celeron
Lenovo Thinkpad 11e Yoga Gen 6 Firmware<=1.12
Lenovo Thinkpad 11e Yoga Gen 6
Lenovo Thinkpad 13 Gen 2 Firmware<=1.29
Lenovo Thinkpad 13 Gen 2
Lenovo Thinkpad L13 Firmware<=1.31
Lenovo Thinkpad L13
Lenovo Thinkpad L13 Gen 2 Firmware<=1.11
Lenovo Thinkpad L13 Gen 2
Lenovo Thinkpad L13 Gen 2 Firmware<=1.08
Lenovo Thinkpad L13 Yoga Firmware<=1.31
Lenovo Thinkpad L13 Yoga
Lenovo Thinkpad L13 Yoga Gen 2 Firmware<=1.11
Lenovo Thinkpad L13 Yoga Gen 2
Lenovo Thinkpad L13 Yoga Gen 2 Firmware<=1.08
Lenovo Thinkpad L14 Gen 1 Firmware<1.15
Lenovo Thinkpad L14 Gen 1
Lenovo Thinkpad L14 Firmware<1.20.1.17
Lenovo Thinkpad L14
Lenovo Thinkpad L15 Gen 1 Firmware<1.15
Lenovo Thinkpad L15 Gen 1
Lenovo Thinkpad L15 Firmware<1.20.1.17
Lenovo Thinkpad L15
Lenovo Thinkpad L380 Firmware<=1.26
Lenovo Thinkpad L380
Lenovo Thinkpad L380 Yoga Firmware<=1.26
Lenovo Thinkpad L380 Yoga
Lenovo Thinkpad L390 Yoga Firmware<=1.35
Lenovo Thinkpad L390 Yoga
Lenovo Thinkpad L390 Firmware<=1.35
Lenovo Thinkpad L390
Lenovo Thinkpad S5 2nd Gen Firmware<=1.28
Lenovo Thinkpad S5 2nd Gen
Lenovo Thinkpad T460 Firmware<=1.43.1.11
Lenovo ThinkPad T460
Lenovo Thinkpad S2 Gen 6 Firmware<=2021-09-30
Lenovo Thinkpad S2 Gen 6
Lenovo Thinkpad S2 Yoga Gen 6 Firmware<=2021-09-30
Lenovo Thinkpad S2 Yoga Gen 6
Lenovo Thinkpad X12 Detachable Gen 1 Firmware<1.16
Lenovo Thinkpad X12 Detachable Gen 1
Lenovo Thinkpad X260 Firmware<=1.47\/1.15
Lenovo Thinkpad X260
Lenovo Thinkpad X380 Yoga Firmware<=1.34
Lenovo Thinkpad X380 Yoga
Lenovo Thinkpad X390 Yoga Firmware<n2let87w
Lenovo Thinkpad X390 Yoga
Lenovo Thinkpad 11e 5th Gen Firmware<=1.13
Lenovo Thinkpad 11e 5th Gen
Lenovo Thinkpad Yoga 370
Lenovo Thinkpad X1 Fold Gen 1 Firmware<n2pet50w
Lenovo Thinkpad X1 Fold Gen 1

Remedy

Update system firmware to the version (or newer) indicated for your model in the Product Impact section in LEN-72619.

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