CVE-2026-33243 (GCVE-0-2026-33243)
Vulnerability from cvelistv5
Published
2026-03-20 22:51
Modified
2026-03-26 20:08
CWE
  • CWE-345 - Insufficient Verification of Data Authenticity
Summary
barebox is a bootloader. In barebox from version 2016.03.0 to before version 2026.03.1 (and the corresponding backport to 2025.09.3), an attacker could exploit a FIT signature verification vulnerability to trick the bootloader into booting different images than those that were verified as part of a signed configuration. mkimage(1) sets the hashed-nodes property of the FIT signature node to list which nodes of the FIT were hashed as part of the signing process as these will need to be verified later on by the bootloader. However, hashed-nodes itself is not part of the hash and could therefore be modified to allow booting different images than those that have been verified. This issue has been patched in barebox versions 2026.03.1 and backported to 2025.09.3.
Impacted products
Vendor Product Version
barebox barebox Version: >= 2016.03.0, < 2025.09.3
Version: >= 2025.10.0, < 2026.03.1
Create a notification for this product.
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-33243",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-24T15:31:22.066555Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-24T15:31:34.971Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "barebox",
          "vendor": "barebox",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2016.03.0, \u003c 2025.09.3"
            },
            {
              "status": "affected",
              "version": "\u003e= 2025.10.0, \u003c 2026.03.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "barebox is a bootloader. In barebox from version 2016.03.0 to before version 2026.03.1 (and the corresponding backport to 2025.09.3), an attacker could exploit a FIT signature verification vulnerability to trick the bootloader into booting different images than those that were verified as part of a signed configuration. mkimage(1) sets the hashed-nodes property of the FIT signature node to list which nodes of the FIT were hashed as part of the signing process as these will need to be verified later on by the bootloader. However, hashed-nodes itself is not part of the hash and could therefore be modified to allow booting different images than those that have been verified. This issue has been patched in barebox versions 2026.03.1 and backported to 2025.09.3."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 8.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-345",
              "description": "CWE-345: Insufficient Verification of Data Authenticity",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-26T20:08:12.009Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/barebox/barebox/security/advisories/GHSA-3fvj-q26p-j6h4",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/barebox/barebox/security/advisories/GHSA-3fvj-q26p-j6h4"
        },
        {
          "name": "https://github.com/barebox/barebox/commit/aca01795056d51060cb096f9a1ea309361743e05",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/barebox/barebox/commit/aca01795056d51060cb096f9a1ea309361743e05"
        }
      ],
      "source": {
        "advisory": "GHSA-3fvj-q26p-j6h4",
        "discovery": "UNKNOWN"
      },
      "title": "barebox: FIT Signature Verification Bypass Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-33243",
    "datePublished": "2026-03-20T22:51:15.938Z",
    "dateReserved": "2026-03-18T02:42:27.509Z",
    "dateUpdated": "2026-03-26T20:08:12.009Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-33243\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-24T15:31:22.066555Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-24T15:31:31.448Z\"}}], \"cna\": {\"title\": \"barebox: FIT Signature Verification Bypass Vulnerability\", \"source\": {\"advisory\": \"GHSA-3fvj-q26p-j6h4\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 8.3, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"HIGH\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"barebox\", \"product\": \"barebox\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= 2016.03.0, \u003c 2025.09.3\"}, {\"status\": \"affected\", \"version\": \"\u003e= 2025.10.0, \u003c 2026.03.1\"}]}], \"references\": [{\"url\": \"https://github.com/barebox/barebox/security/advisories/GHSA-3fvj-q26p-j6h4\", \"name\": \"https://github.com/barebox/barebox/security/advisories/GHSA-3fvj-q26p-j6h4\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/barebox/barebox/commit/aca01795056d51060cb096f9a1ea309361743e05\", \"name\": \"https://github.com/barebox/barebox/commit/aca01795056d51060cb096f9a1ea309361743e05\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"barebox is a bootloader. In barebox from version 2016.03.0 to before version 2026.03.1 (and the corresponding backport to 2025.09.3), an attacker could exploit a FIT signature verification vulnerability to trick the bootloader into booting different images than those that were verified as part of a signed configuration. mkimage(1) sets the hashed-nodes property of the FIT signature node to list which nodes of the FIT were hashed as part of the signing process as these will need to be verified later on by the bootloader. However, hashed-nodes itself is not part of the hash and could therefore be modified to allow booting different images than those that have been verified. This issue has been patched in barebox versions 2026.03.1 and backported to 2025.09.3.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-345\", \"description\": \"CWE-345: Insufficient Verification of Data Authenticity\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-03-26T20:08:12.009Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-33243\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-26T20:08:12.009Z\", \"dateReserved\": \"2026-03-18T02:42:27.509Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-03-20T22:51:15.938Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


Loading…

Loading…