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CVE-2021-3897

Quick assessment

Affected
Lenovo Fan Power Controller2 (FPC2)
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 Fan Power Controller2（Lenovo Fpc2）是中国联想（Lenovo）公司的一个风扇电源控制器固件。 Lenovo Fan Power Controller2 (FPC2) 和 Lenovo System Management Module (SMM) 固件的内部服务中存在安全漏洞，该漏洞可能允许未经身份验证的攻击者在 SMM 和 FPC2 上执行命令。SMM2 不受影响。

CVSS 9.8 · Critical EPSS 1.30% · P69
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I. Basic Information for CVE-2021-3897

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An authentication bypass vulnerability was discovered in an internal service of the Lenovo Fan Power Controller2 (FPC2) and Lenovo System Management Module (SMM) firmware during an that could allow an unauthenticated attacker to execute commands on the SMM and FPC2. SMM2 is not affected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用候选路径或通道进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
Lenovo Fan Power Controller2 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Lenovo Fan Power Controller2（Lenovo Fpc2）是中国联想（Lenovo）公司的一个风扇电源控制器固件。 Lenovo Fan Power Controller2 (FPC2) 和 Lenovo System Management Module (SMM) 固件的内部服务中存在安全漏洞，该漏洞可能允许未经身份验证的攻击者在 SMM 和 FPC2 上执行命令。SMM2 不受影响。
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 Fan Power Controller2 (FPC2) various -
Lenovo Lenovo System Management Module (SMM) various -

II. Public POCs for CVE-2021-3897

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III. Intelligence Information for CVE-2021-3897

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Vendor Advisories for CVE-2021-3897 (1)

Same Patch Batch · Lenovo · 2022-04-22 · 15 CVEs total

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-2021-3970 6.7 MEDIUM Lenovo Notebook 输入验证错误漏洞
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

Same product: Fan Power Controller2 (FPC2)
Same vendor: Lenovo
Same weakness: CWE-288

V. Comments for CVE-2021-3897

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