Vulnerability-Lookup

UBUNTU-CVE-2018-3968 (CVE-2018-3968)

Vulnerability from osv_ubuntu – Published: 2019-03-21 17:29 – Updated: 2025-07-16 04:53 – Source website

Withdrawn 2025-07-18

Details

An exploitable vulnerability exists in the verified boot protection of the Das U-Boot from version 2013.07-rc1 to 2014.07-rc2. The affected versions lack proper FIT signature enforcement, which allows an attacker to bypass U-Boot's verified boot and execute an unsigned kernel, embedded in a legacy image format. To trigger this vulnerability, a local attacker needs to be able to supply the image to boot.

Severity

7.0 (High)


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

8.2 (High)


                    
                      CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

7.0 (High)


                    
                      CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2018-3968	REPORT
	https://talosintelligence.com/vulnerability_repor…	REPORT
	https://www.cve.org/CVERecord?id=CVE-2018-3968	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "u-boot",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
          },
          {
            "binary_name": "u-boot-amlogic",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
          },
          {
            "binary_name": "u-boot-exynos",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
          },
          {
            "binary_name": "u-boot-imx",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
          },
          {
            "binary_name": "u-boot-omap",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
          },
          {
            "binary_name": "u-boot-qcom",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
          },
          {
            "binary_name": "u-boot-rockchip",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
          },
          {
            "binary_name": "u-boot-rpi",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
          },
          {
            "binary_name": "u-boot-sunxi",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
          },
          {
            "binary_name": "u-boot-tegra",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
          },
          {
            "binary_name": "u-boot-tools",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "u-boot",
        "purl": "pkg:deb/ubuntu/u-boot@2019.07+dfsg-1ubuntu4~18.04.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2019.07+dfsg-1ubuntu4~18.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2016.03+dfsg1-6ubuntu2",
        "2018.07~rc3+dfsg1-0ubuntu1~18.04.1",
        "2018.07~rc3+dfsg1-0ubuntu2~18.04.1",
        "2018.07~rc3+dfsg1-0ubuntu3~18.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "An exploitable vulnerability exists in the verified boot protection of the Das U-Boot from version 2013.07-rc1 to 2014.07-rc2. The affected versions lack proper FIT signature enforcement, which allows an attacker to bypass U-Boot\u0027s verified boot and execute an unsigned kernel, embedded in a legacy image format. To trigger this vulnerability, a local attacker needs to be able to supply the image to boot.",
  "id": "UBUNTU-CVE-2018-3968",
  "modified": "2025-07-16T04:53:28Z",
  "published": "2019-03-21T17:29:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2018-3968"
    },
    {
      "type": "REPORT",
      "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2018-0633"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2018-3968"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2018-3968"
  ],
  "withdrawn": "2025-07-18T16:44:25Z"
}

CVE-2018-3968 (GCVE-0-2018-3968)

Vulnerability from cvelistv5 – Published: 2019-03-21 16:36 – Updated: 2024-08-05 04:57

Summary

Severity

8.2 (High)


                        
                          CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CWE

Improper Verification of Cryptographic Signature

Assigner

talos CNA under the mitre root

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

References

1 reference

URL	Tags
https://talosintelligence.com/vulnerability_repor…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
n/a	Das U-Boot	Affected: Das U-Boot 2013.07-rc1 to 2014.07-rc2 OCTEON-SDK 3.1.2 to 5.1 CUJO Smart Firewall - Firmware version 7003

Date Public

2019-03-19 00:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T04:57:24.503Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
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        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2018-0633"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Das U-Boot",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Das U-Boot 2013.07-rc1 to 2014.07-rc2 OCTEON-SDK 3.1.2 to 5.1 CUJO Smart Firewall - Firmware version 7003"
            }
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        }
      ],
      "datePublic": "2019-03-19T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "An exploitable vulnerability exists in the verified boot protection of the Das U-Boot from version 2013.07-rc1 to 2014.07-rc2. The affected versions lack proper FIT signature enforcement, which allows an attacker to bypass U-Boot\u0027s verified boot and execute an unsigned kernel, embedded in a legacy image format. To trigger this vulnerability, a local attacker needs to be able to supply the image to boot."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Improper Verification of Cryptographic Signature",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-04-19T18:07:11.000Z",
        "orgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b",
        "shortName": "talos"
      },
      "references": [
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          "tags": [
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          "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2018-0633"
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      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
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          "ID": "CVE-2018-3968",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Das U-Boot",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "Das U-Boot 2013.07-rc1 to 2014.07-rc2 OCTEON-SDK 3.1.2 to 5.1 CUJO Smart Firewall - Firmware version 7003"
                          }
                        ]
                      }
                    }
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                },
                "vendor_name": "n/a"
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            }
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            "baseSeverity": "High",
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              "name": "https://talosintelligence.com/vulnerability_reports/TALOS-2018-0633",
              "refsource": "MISC",
              "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2018-0633"
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  "cveMetadata": {
    "assignerOrgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b",
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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.

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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.

Action not permitted

UBUNTU-CVE-2018-3968 (CVE-2018-3968)

CVE-2018-3968 (GCVE-0-2018-3968)

Tags

Sightings

Nomenclature

Related by attack behaviour