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Debug Functions Unlockable Without Triggering Measured Boot

Moderate
eriknordmark published GHSA-4c4v-42hc-72p6 Feb 4, 2026

Package

gomod github.com/lf-edge/eve/pkg/pillar/evetpm (Go)

Affected versions

<​​ 10.1.0 and < 9.4.3-lts

Patched versions

​​10.1.0 and 9.4.3-lts

Description

Impact

On boot, Pillar checks for /config/GlobalConfig/global.json and overrides system configuration if present. This allows enabling debug functions like SSH (debug.enable.ssh), USB keyboard (debug.enable.usb), and VNC access (app.allow.vnc) without triggering the measured boot.

Thus a user with physical access can take out the disk and modify the content of this file in the /config partition and then re-insert the disk.

Patches

Fixed in ​​10.1.0 and 9.4.3-lts

Workarounds

None

References

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Physical
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality
Low
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N

CVE ID

CVE-2023-43633

Weaknesses

Insufficiently Protected Credentials

The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval. Learn more on MITRE.

Insecure Storage of Sensitive Information

The product stores sensitive information without properly limiting read or write access by unauthorized actors. Learn more on MITRE.