Vulnerability-Lookup

GHSA-4C4V-42HC-72P6

Vulnerability from github – Published: 2026-02-04 21:36 – Updated: 2026-02-04 21:36

Summary

EVE's Debug Functions Unlockable Without Triggering Measured Boot

Details

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

Severity

5.9 (Medium)


                  
                    CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N

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JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/lf-edge/eve"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.0-20220708121648-5fef4d92e758"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-43633"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-522",
      "CWE-922"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-04T21:36:42Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nOn 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.\n\n### Patches\n\nFixed in \u200b\u200b10.1.0 and 9.4.3-lts\n\n### Workarounds\n\nNone",
  "id": "GHSA-4c4v-42hc-72p6",
  "modified": "2026-02-04T21:36:42Z",
  "published": "2026-02-04T21:36:42Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/lf-edge/eve/security/advisories/GHSA-4c4v-42hc-72p6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-43633"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lf-edge/eve/commit/5fef4d92e75838cc78010edaed5247dfbdae1889"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lf-edge/eve/commit/aa3501d6c57206ced222c33aea15a9169d629141"
    },
    {
      "type": "WEB",
      "url": "https://asrg.io/security-advisories/cve-2023-43633"
    },
    {
      "type": "WEB",
      "url": "https://asrg.io/security-advisories/debug-functions-unlockable-without-triggering-measured-boot"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/lf-edge/eve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "EVE\u0027s Debug Functions Unlockable Without Triggering Measured Boot"
}

CVE-2023-43633 (GCVE-0-2023-43633)

Vulnerability from cvelistv5 – Published: 2023-09-21 13:08 – Updated: 2024-09-24 17:00

Title

Debug Functions Unlockable Without Triggering Measured Boot

Summary

On boot, the Pillar eve container checks for the existence and content of “/config/GlobalConfig/global.json”. If the file exists, it overrides the existing configuration on the device on boot. This allows an attacker to change the system’s configuration, which also includes some debug functions. This could be used to unlock the ssh with custom “authorized_keys” via the “debug.enable.ssh” key, similar to the “authorized_keys” finding that was noted before. Other usages include unlocking the usb to enable the keyboard via the “debug.enable.usb” key, allowing VNC access via the “app.allow.vnc” key, and more. An attacker could easily enable these debug functionalities without triggering the “measured boot” mechanism implemented by EVE OS, and without marking the device as “UUD” (“Unknown Update Detected”). This is because the “/config” partition is not protected by “measured boot”, it is mutable and it is not encrypted in any way. An attacker can gain full control over the device without changing the PCR values, thereby not triggering the “measured boot” mechanism, and having full access to the vault. Note: This issue was partially fixed in these commits (after disclosure to Zededa), where the config partition measurement was added to PCR13: • aa3501d6c57206ced222c33aea15a9169d629141 • 5fef4d92e75838cc78010edaed5247dfbdae1889. This issue was made viable in version 9.0.0 when the calculation was moved to PCR14 but it was not included in the measured boot.

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-24 16:59 UTC

CWE

CWE-522 - Insufficiently Protected Credentials
CWE-922 - Insecure Storage of Sensitive Information

Assigner

ASRG icscert root Scorecard

References

1 reference

URL	Tags
https://asrg.io/security-advisories/cve-2023-43633/

Impacted products

2 products

Vendor	Product	Version
LF-Edge, Zededa	EVE OS	Affected: 0 , < 8.6.0 (release) Affected: 9.0.0 , < 9.5.0 (release)
lfedge	eve	Affected: 0 , < 8.6.0 (custom) Affected: 9.0.0 , < 9.5.0 (custom) cpe:2.3:o:lfedge:eve::::::::

Credits

Ilay Levi

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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