Read the docs
TI-2023-23365 Aliases CVE-2023-43637GHSA-g7vp-j25f-h34p

Vault Key Partially Predetermined

Priority LOW 35CWE-321Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Security bypass
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-321.

Summary

Due to the implementation of "deriveVaultKey", prior to version 7.10, the generated vault key would always have the last 16 bytes predetermined to be "arfoobarfoobarfo". This issue happens because "deriveVaultKey" calls "retrieveCloudKey" (which will always return "foobarfoobarfoobarfoobarfoobarfo" as the key), and then merges the 32byte randomly generated key with this key (by takeing 16bytes from each, see "mergeKeys"). This makes the key a lot weaker. This issue does not persist in devices that were initialized on/after version 7.10, but devices that were initialized before that and updated to a newer version still have this issue. Roll an update that enforces the full 32bytes key usage.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00142 3rd percentileScored 2026-11-07
Fix Fixed EVE OS ( LF-Edge, Zededa): 7.10github.com/lf-edge/eve (Go): 0.0.0-20220310190112-c0c966dc31e2

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

VendorProductAffected versionsFixed inStatusSource
LF-Edge, ZededaEVE OSbefore 7.107.10Patch availableCNA
—github.com/lf-edge/eve (Go)before 0.0.0-20220310190112-c0c966dc31e20.0.0-20220310190112-c0c966dc31e2Patch availableGHSA-g7vp-j25f-h34p
  • EVE OS VendorLF-Edge, Zededa Affected before 7.10 Fixed in 7.10 Patch available CNA
  • github.com/lf-edge/eve (Go) Vendor— Affected before 0.0.0-20220310190112-c0c966dc31e2 Fixed in 0.0.0-20220310190112-c0c966dc31e2 Patch available GHSA-g7vp-j25f-h34p

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:lfedge:eve:*:*:*:*:*:*:*:*before 7.10VulnerableLF-Edge, Zededa
  • cpe:2.3:o:lfedge:eve:*:*:*:*:*:*:*:* Versions before 7.10 Vulnerable ·LF-Edge, Zededa

Remediation

  • Fix · CNA EVE OS ( LF-Edge, Zededa) Fixed in 7.10
  • Fix · GHSA-g7vp-j25f-h34p github.com/lf-edge/eve (Go) Fixed in 0.0.0-20220310190112-c0c966dc31e2 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-43637
  2. 2026-10-03 Alias added: GHSA-g7vp-j25f-h34p

References

Advisory 2

Other 5

  • TI-2023-23362 Config Partition Not Protected by Measured Boot CVSS 3.1HIGH 8.8
  • TI-2023-23361 Debug Functions Unlockable Without Triggering Measured Boot CVSS 3.1HIGH 8.8

Sources

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