TI-2023-23362 Aliases CVE-2023-43634 GHSA-wc42-fcjp-v8vq

Config Partition Not Protected by Measured Boot

LOW 39CWE-522Published 2023-09-21 · Updated 2024-09-24

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-522.

Summary

When sealing/unsealing the “vault” key, a list of PCRs is used, which defines which PCRs are used. In a previous project, CYMOTIVE found that the configuration is not protected by the secure boot, and in response Zededa implemented measurements on the config partition that was mapped to PCR 13. In that process, PCR 13 was added to the list of PCRs that seal/unseal the key. In commit “56e589749c6ff58ded862d39535d43253b249acf”, the config partition measurement moved from PCR 13 to PCR 14, but PCR 14 was not added to the list of PCRs that seal/unseal the key. This change makes the measurement of PCR 14 effectively redundant as it would not affect the sealing/unsealing of the key. An attacker could modify the config partition without triggering the measured boot, this could result in the attacker gaining full control over the device with full access to the contents of the encrypted “vault”

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00171 6th percentileScored 2026-11-07

Fix Fixed EVE OS ( LF-Edge, Zededa): 8.6.0, 9.5.0github.com/lf-edge/eve (Go): 0.0.0-20230519072751-977f42b07fa9

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
LF-Edge, Zededa	EVE OS	before 8.6.0; 9.0.0 to before 9.5.0	8.6.0, 9.5.0	Patch available	CNA
—	github.com/lf-edge/eve (Go)	before 0.0.0-20230519072751-977f42b07fa9	0.0.0-20230519072751-977f42b07fa9	Patch available	GHSA-wc42-fcjp-v8vq

EVE OS VendorLF-Edge, Zededa Affected before 8.6.0; 9.0.0 to before 9.5.0 Fixed in 8.6.0, 9.5.0 Patch available CNA
github.com/lf-edge/eve (Go) Vendor— Affected before 0.0.0-20230519072751-977f42b07fa9 Fixed in 0.0.0-20230519072751-977f42b07fa9 Patch available GHSA-wc42-fcjp-v8vq

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:o:lfedge:eve::::::::	before 8.6.0; 9.0.0 to before 9.5.0	Vulnerable	LF-Edge, Zededa

cpe:2.3:o:lfedge:eve:*:*:*:*:*:*:*:* Versions before 8.6.0; 9.0.0 to before 9.5.0 Vulnerable ·LF-Edge, Zededa

Remediation

Fix · CNA EVE OS ( LF-Edge, Zededa) Fixed in 8.6.0, 9.5.0
Fix · GHSA-wc42-fcjp-v8vq github.com/lf-edge/eve (Go) Fixed in 0.0.0-20230519072751-977f42b07fa9 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2023-09-21
LF-Edge, Zededa EVE OS 8.6.0, 9.5.0
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2023-23361 Debug Functions Unlockable Without Triggering Measured BootPriority LOW 39
- TI-2023-23359 SSH as Root Unlockable Without Triggering Measured BootPriority LOW 39
Show all 3 records →

Timeline

2026-10-02 Threatist record created from CVE-2023-43634
2026-10-03 Alias added: GHSA-wc42-fcjp-v8vq

References

Advisory 2

Other 4

TI-2023-23361 Debug Functions Unlockable Without Triggering Measured Boot CVSS 3.1HIGH 8.8
TI-2023-23365 Vault Key Partially Predetermined CVSS 3.1HIGH 7.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences