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Fencer Vulns
medium 6.7

CVE-2022-34302 json

A flaw was found in New Horizon Datasys bootloaders before 2022-06-01.

published 2022-08-26 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-37259

cvss
6.7
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits
0
none known

Summary

A flaw was found in New Horizon Datasys 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.

Patch / fix

  • horizondatasys uefi_bootloader 2022-06-01
  • fwupd RHEL 9 1.8.10-2.el9
  • fwupd-plugin-flashrom RHEL 9 1.8.10-2.el9

red hat advisories RHSA-2023:2487

  • fwupd AlmaLinux 9 1.8.10-2.el9.alma
  • fwupd-plugin-flashrom AlmaLinux 9 1.8.10-2.el9.alma

almalinux advisories ALSA-2023:2487

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-34302 updated cvss 7.5

shim: 3rd party shim allow secure boot bypass

  • Red Hat Enterprise Linux 7 fwupd Red Hat Enterprise Linux 8 fwupd
    affected: no fix available
  • Red Hat Enterprise Linux AppStream (v. 9) fwupd-plugin-flashrom 1.8.10-2.el9 Red Hat Enterprise Linux BaseOS (v. 9) fwupd 1.8.10-2.el9 Red Hat Enterprise Linux CRB (v. 9) fwupd-devel 1.8.10-2.el9, fwupd-debuginfo 1.8.10-2.el9, fwupd-debugsource 1.8.10-2.el9, fwupd-tests-debuginfo 1.8.10-2.el9, fwupd-plugin-flashrom-debuginfo 1.8.10-2.el9
    fixed: vendor fix RHSA-2023:2487
  • Red Hat Enterprise Linux 7 shim, mokutil, shim-unsigned, shim-unsigned-x64, shim-unsigned-ia32 Red Hat Enterprise Linux 8 shim, shim-x64, shim-aa64, shim-ia32 Red Hat Enterprise Linux 9 shim, shim-x64, shim-aa64
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.09% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.