Is CVE-2022-34303 in the CISA KEV catalog?

No. CVE-2022-34303 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-34303?

CVE-2022-34303 has a CVSS v3 base score of 6.7 (MEDIUM).

What is the EPSS score for CVE-2022-34303?

CVE-2022-34303 has an EPSS score of 0.81% (53th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-34303?

Install KB5012170 for Windows 10. Fixes are available for 34 affected products.

CVE & CISA-KEV Catalog

CVE-2022-34303

MEDIUM

6.7

CVSS v3

NVD

Description

A flaw was found in Eurosoft bootloaders before 2022-06-01. An attacker may use this bootloader to bypass or tamper with Secure Boot protections. In order to load and execute arbitrary code in the pre-boot stage, an attacker simply needs to replace the existing signed bootloader currently in use with this bootloader. Access to the EFI System Partition is required for booting using external media.

How to fix

Remediation Available

Windows 10Windows

Install:KB5012170Microsoft

Windows 10 Version 1607Windows

Install:KB5012170Microsoft

Windows 10 Version 1809Windows

Install:KB5012170Microsoft

Windows 10 Version 20H2Windows

Install:KB5012170Microsoft

Windows 10 Version 21H1Windows

Install:KB5012170Microsoft

Windows 10 Version 21H2Windows

Install:KB5012170Microsoft

Windows 11 version 21H2Windows

Install:KB5016629Microsoft

Windows 8.1Windows

Install:KB5012170Microsoft

Windows RT 8.1Windows

Install:KB5012170

Windows Server 2012Windows

Install:KB5012170Microsoft

Windows Server 2012 (Server Core installation)Windows

Install:KB5012170Microsoft

Windows Server 2012 R2Windows

Install:KB5012170Microsoft

Windows Server 2012 R2 (Server Core installation)Windows

Install:KB5012170Microsoft

Windows Server 2016Windows

Install:KB5012170Microsoft

Windows Server 2016 (Server Core installation)Windows

Install:KB5012170Microsoft

Windows Server 2019Windows

Install:KB5012170Microsoft

Windows Server 2019 (Server Core installation)Windows

Install:KB5012170Microsoft

Windows Server 2022Windows

Install:KB5016627Microsoft

Windows Server 2022 (Server Core installation)Windows

Install:KB5016627Microsoft

Windows Server, version 20H2 (Server Core Installation)Windows

Install:KB5016616Microsoft

fwupdRed Hat / RHEL

Fixed in:0:1.8.10-2.el9RHSA-2023:2487

fwupdRocky

Fixed in:0:1.8.10-2.el9RHSA-2023:2487

fwupd-debuginfoRed Hat / RHEL

Fixed in:0:1.8.10-2.el9RHSA-2023:2487

fwupd-debuginfoRocky

Fixed in:0:1.8.10-2.el9RHSA-2023:2487

fwupd-debugsourceRocky

Fixed in:0:1.8.10-2.el9RHSA-2023:2487

fwupd-debugsourceRed Hat / RHEL

Fixed in:0:1.8.10-2.el9RHSA-2023:2487

fwupd-develRed Hat / RHEL

Fixed in:0:1.8.10-2.el9RHSA-2023:2487

fwupd-develRocky

Fixed in:0:1.8.10-2.el9RHSA-2023:2487

fwupd-plugin-flashromRed Hat / RHEL

Fixed in:0:1.8.10-2.el9RHSA-2023:2487

fwupd-plugin-flashromRocky

Fixed in:0:1.8.10-2.el9RHSA-2023:2487

fwupd-plugin-flashrom-debuginfoRocky

Fixed in:0:1.8.10-2.el9RHSA-2023:2487

fwupd-plugin-flashrom-debuginfoRed Hat / RHEL

Fixed in:0:1.8.10-2.el9RHSA-2023:2487

fwupd-tests-debuginfoRocky

Fixed in:0:1.8.10-2.el9RHSA-2023:2487

fwupd-tests-debuginfoRed Hat / RHEL

Fixed in:0:1.8.10-2.el9RHSA-2023:2487

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.81%probability of exploitation in 30 days

53rdpercentile

Moderate risk: more likely to be exploited than 53% of all known CVEs.

References

Third-Party Advisory2

Other references1

intel.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.