CVE-2023-43634

Device takeover via omitted PCR 14 sealing

Published Sep 21, 2023 · Updated Sep 24, 2024

Measured-boot bypass in LF Edge EVE allows physically proximate attackers to alter device configuration and access the encrypted vault. Vault-key sealing continues to bind PCR 13 after config-partition measurements moved to PCR 14, so configuration changes do not affect unsealing. Exploitation requires physical access to remove, modify, and reinstall the disk; a successful change permits full device control and vault access.

CVSS severity8.8
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Measured-boot bypass in LF Edge EVE allows physically proximate attackers to alter device configuration and access the encrypted vault. Vault-key sealing continues to bind PCR 13 after config-partition measurements moved to PCR 14, so configuration changes do not affect unsealing. Exploitation requires physical access to remove, modify, and reinstall the disk; a successful change permits full device control and vault access.

The record

CVE
CVE-2023-43634
Published
Sep 21, 2023
Updated
Sep 24, 2024
Vendor
LF Edge
Product
EVE-OS
Classifications
CWE-922, CWE-522, CAPEC-115, T1562.001
Attack vector
physical
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 21, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <8.6.0
  2. Affected versionversion=9.0.0 <9.5.0

What conditions does exploitation require?

Attack vectorphysical
Required privilegesUnavailable in this record.

What is affected?

LF Edge · EVE-OSversion=0 <8.6.0; version=9.0.0 <9.5.0
LF Edge · EVEversion=0 <8.6.0; version=9.0.0 <9.5.0

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
8.8ASRGCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
5.9GitHubCVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-922Insecure Storage of Sensitive Information
CWE-522Insufficiently Protected Credentials
CAPEC-115Authentication Bypass
T1562.001Impair Defenses: Disable or Modify Tools

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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