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Medium severity · published Apr 22, 2022
CVE-2021-3971
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…
6.7
CVSS
1.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 69% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
I3
Ideapad 3-14ada05 Firmware · Lenovo
before e8cn33ww · source: NVD
I3
Ideapad 3-14ada6 Firmware · Lenovo
before hbcn21ww · source: NVD
I3
Ideapad 3-14alc6 Firmware · Lenovo
before glcn43ww · source: NVD
I3
Ideapad 3-14are05 Firmware · Lenovo
before dzcn42ww · source: NVD
I3
Ideapad 3-15ada05 Firmware · Lenovo
before e8cn33ww · source: NVD
I3
Ideapad 3-15ada6 Firmware · Lenovo
before hbcn21ww · source: NVD
I3
Ideapad 3-15alc6 Firmware · Lenovo
before glcn43ww · source: NVD
I3
Ideapad 3-15are05 Firmware · Lenovo
before dzcn42ww · source: NVD
I3
Ideapad 3-15igl05 Firmware · Lenovo
before dvcn23ww · source: NVD
I3
Ideapad 3-17ada05 Firmware · Lenovo
before e8cn33ww · source: NVD
I3
Ideapad 3-17ada6 Firmware · Lenovo
before hbcn21ww · source: NVD
I3
Ideapad 3-17alc6 Firmware · Lenovo
before glcn43ww · source: NVD
Affected product
I3
Ideapad 3-14ada05 Firmware
Lenovo
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3971
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3971
Vendor Advisory
https://support.lenovo.com/us/en/product_security/LEN-73440
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