CVE-2021-3970
Quick assessment
Affected
Lenovo Notebook BIOS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Lenovo Notebook是中国联想（Lenovo）公司的联想的一款笔记本电脑。 Lenovo Notebook存在输入验证错误漏洞，该漏洞的存在是由于对 LenovoVariable SMI 处理程序中用户提供的输入的验证不充分。本地用户可以运行特制程序以提升权限执行任意代码。该漏洞允许本地用户提升系统的权限。
Possible ATT&CK Techniques 1 AI
T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2021-3970
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Lenovo Notebook 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Lenovo Notebook是中国联想（Lenovo）公司的联想的一款笔记本电脑。 Lenovo Notebook存在输入验证错误漏洞，该漏洞的存在是由于对 LenovoVariable SMI 处理程序中用户提供的输入的验证不充分。本地用户可以运行特制程序以提升权限执行任意代码。该漏洞允许本地用户提升系统的权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Lenovo | Notebook BIOS | various | - |
|
II. Public POCs for CVE-2021-3970
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2021-3970 (1)
-
https://support.lenovo.com/us/en/product_security/LEN-73440 x_refsource_MISC
Same Patch Batch · Lenovo · 2022-04-22 · 15 CVEs total
| CVE-2021-3897 | 9.8 CRITICAL | Lenovo Fan Power Controller2 授权问题漏洞 |
| CVE-2021-3849 | 9.8 CRITICAL | Lenovo Fan Power Controller2和Lenovo System Management Module 授权问题漏洞 |
| CVE-2022-0354 | 7.3 HIGH | Lenovo Vantage代码注入漏洞 |
| CVE-2022-0192 | 7.3 HIGH | Lenovo PCManager 代码问题漏洞 |
| CVE-2022-1108 | 6.7 MEDIUM | Lenovo ThinkPad 缓冲区错误漏洞 |
| CVE-2022-1107 | 6.7 MEDIUM | Lenovo ThinkPad 权限许可和访问控制问题漏洞 |
| CVE-2021-4212 | 6.7 MEDIUM | Lenovo Notebook 输入验证错误漏洞 |
| CVE-2021-4211 | 6.7 MEDIUM | Intel Processors 输入验证错误漏洞 |
| CVE-2021-4210 | 6.7 MEDIUM | Intel Processors 安全漏洞 |
| CVE-2021-3972 | 6.7 MEDIUM | Lenovo Notebook 安全漏洞 |
| CVE-2021-3971 | 6.7 MEDIUM | Lenovo Notebook 安全漏洞 |
| CVE-2021-3721 | 5.5 MEDIUM | Lenovo Pcmanager 缓冲区错误漏洞 |
| CVE-2022-0636 | 5.0 MEDIUM | Lenovo Thin Installer 输入验证错误漏洞 |
| CVE-2021-3722 | 5.0 MEDIUM | Lenovo Pcmanager 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2021-3970
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