What is the CVSS score of CVE-2022-4020?

CVE-2022-4020 has a CVSS 3.1 base score of 8.2 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Aspire A315 22G Firmware CVE-2022-4020

HIGH

Incorrect Default Permissions (CWE-276)

2022-11-28 security@eset.com

Privilege Escalation Aspire A315 22G Firmware Aspire A115 21 Firmware Aspire A315 22 Firmware Extensa Ex215 21 Firmware Extensa Ex215 21G Firmware

8.2

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.2 HIGH

AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Nov 28, 2022 - 13:15 nvd

HIGH 8.2

DescriptionNVD

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.

AnalysisAI

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. Rated high severity (CVSS 8.2), this vulnerability is low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Incorrect Default Permissions (CWE-276), which allows attackers to access resources due to overly permissive default settings. 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. Affected products include: Acer Aspire A315-22G Firmware, Acer Aspire A115-21 Firmware, Acer Aspire A315-22 Firmware, Acer Extensa Ex215-21 Firmware, Acer Extensa Ex215-21G Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Set restrictive default permissions, follow principle of least privilege, review defaults during deployment.