Vulnerability-Lookup

GHSA-5H7V-G49C-H887

Vulnerability from github – Published: 2026-02-04 23:14 – Updated: 2026-02-04 23:14

Summary

EVE Doesn't Protect Rootfs

Details

Impact

Measured boot validates BIOS, grub, kernel cmdline, and initrd but not the entire rootfs. Thus, an attacker can create an EVE-OS rootfs squashfs image with some files modified and take out the disk and replace the existing rootfs image without that being detected by measure boot and remote attestation.

Patches

Fixed in 8.6.0 and 8.12.1-lts

Workarounds

None

Severity

6.7 (Medium)


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

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/lf-edge/eve/pkg/grub"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.0-20220708121648-5fef4d92e758"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-43636"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-345"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-04T23:14:42Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nMeasured boot validates BIOS, grub, kernel cmdline, and initrd but not the entire rootfs. Thus, an attacker can create an EVE-OS rootfs squashfs image with some files modified and take out the disk and replace the existing rootfs image without that being detected by measure boot and remote attestation.\n\n### Patches\n\nFixed in 8.6.0 and 8.12.1-lts\n\n### Workarounds\n\nNone",
  "id": "GHSA-5h7v-g49c-h887",
  "modified": "2026-02-04T23:14:42Z",
  "published": "2026-02-04T23:14:42Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/lf-edge/eve/security/advisories/GHSA-5h7v-g49c-h887"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-43636"
    },
    {
      "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/19274"
    },
    {
      "type": "WEB",
      "url": "https://asrg.io/security-advisories/cve-2023-43636"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/lf-edge/eve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:P/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "EVE Doesn\u0027t Protect Rootfs"
}

CVE-2023-43636 (GCVE-0-2023-43636)

Vulnerability from cvelistv5 – Published: 2023-09-20 14:50 – Updated: 2024-09-24 18:32

Title

Rootfs Not Protected

Summary

In EVE OS, the “measured boot” mechanism prevents a compromised device from accessing the encrypted data located in the vault. As per the “measured boot” design, the PCR values calculated at different stages of the boot process will change if any of their respective parts are changed. This includes, among other things, the configuration of the bios, grub, the kernel cmdline, initrd, and more. However, this mechanism does not validate the entire rootfs, so an attacker can edit the filesystem and gain control over the system. As the default filesystem used by EVE OS is squashfs, this is somewhat harder than an ext4, which is easily changeable. This will not stop an attacker, as an attacker can repackage the squashfs with their changes in it and replace the partition altogether. This can also be done directly on the device, as the “003-storage-init” container contains the “mksquashfs” and “unsquashfs” binaries (with the corresponding libs). An attacker can gain full control over the device without changing the PCR values, thus 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 18:32 UTC

CWE

CWE-345 - Insufficient Verification of Data Authenticity

Assigner

ASRG CNA under the icscert root

CNA scorecard – unranked: 8 records in the last 180 days, 10 needed details

References

1 reference

URL	Tags
https://asrg.io/security-advisories/cve-2023-43636/

Impacted products

1 product

Vendor	Product	Version
LF-Edge, Zededa	EVE OS	Affected: 9.0.0 , < 9.5.0 (release) Affected: 0 , < 8.6.0 (release)

Date Public

2023-09-20 14:46

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.

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