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CVE-2022-4020— Acer Aspire BIOS vulnerability

Quick assessment

Affected
Acer Aspire A315-22
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.

Acer Extensa Series是中国宏碁（Acer）公司的一系列笔记本电脑。 Acer Extensa Series 存在安全漏洞，该漏洞源于其HQSwSmiDxe DXE驱动程序允许具有更高权限的攻击者通过修改NVRAM变量来修改UEFI安全引导设置。

CVSS 8.1 · High EPSS 0.24% · P15

Possible ATT&CK Techniques 1 AI

T1556 · Modify Authentication Process
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I. Basic Information for CVE-2022-4020

Vulnerability Information
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Vulnerability Title
Acer Aspire BIOS vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Vulnerability in the HQSwSmiDxe DXE driver on some consumer Acer Notebook devices may allow an attacker with elevated privileges to modify UEFI Secure Boot settings by modifying an NVRAM variable.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
缺省权限不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Acer Extensa Series 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Acer Extensa Series是中国宏碁（Acer）公司的一系列笔记本电脑。 Acer Extensa Series 存在安全漏洞，该漏洞源于其HQSwSmiDxe DXE驱动程序允许具有更高权限的攻击者通过修改NVRAM变量来修改UEFI安全引导设置。
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
Acer Aspire A315-22 1.04 ~ 1.11 -
Acer Aspire A115-21 1.04 ~ 1.11 -
Acer Aspire A315-22G 1.04 ~ 1.11 -
Acer Extensa EX215-21 1.04 ~ 1.11 -
Acer Extensa EX215-21G 1.04 ~ 1.11 -

II. Public POCs for CVE-2022-4020

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III. Intelligence Information for CVE-2022-4020

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Other References for CVE-2022-4020 (1)

IV. Related Vulnerabilities

Same vendor: Acer
Same weakness: CWE-276

V. Comments for CVE-2022-4020

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