FKIE_CVE-2021-38576

Vulnerability from fkie_nvd - Published: 2022-01-03 22:15 - Updated: 2026-06-17 04:02
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
A BIOS bug in firmware for a particular PC model leaves the Platform authorization value empty. This can be used to permanently brick the TPM in multiple ways, as well as to non-permanently DoS the system.
References
infosec@edk2.groups.iohttps://bugzilla.tianocore.org/show_bug.cgi?id=3499Issue Tracking, Permissions Required, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.tianocore.org/show_bug.cgi?id=3499Issue Tracking, Permissions Required, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/06/msg00007.html
Impacted products
Vendor Product Version
tianocore edk2 201808
tianocore edk2 201811
tianocore edk2 201903
tianocore edk2 201905
tianocore edk2 201908
tianocore edk2 201911
tianocore edk2 202002
tianocore edk2 202005
tianocore edk2 202008
tianocore edk2 202011
tianocore edk2 202102
tianocore edk2 202105
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "EDK II",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "edk2-stable202105, edk2-stable202102, edk2-stable202011, edk2-stable202008, edk2-stable202005, edk2-stable202002, edk2-stable201911, edk2-stable201908, edk2-stable201905, edk2-stable201903, edk2-stable201811, edk2-stable201808"
            }
          ]
        }
      ],
      "source": "infosec@edk2.groups.io"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:tianocore:edk2:201808:*:*:*:*:*:*:*",
              "matchCriteriaId": "8757385B-6944-488F-B565-417A37C24774",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:tianocore:edk2:201811:*:*:*:*:*:*:*",
              "matchCriteriaId": "E5C29B4B-635D-498E-BFA0-C99810C7867F",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:tianocore:edk2:201903:*:*:*:*:*:*:*",
              "matchCriteriaId": "A599E9E7-B318-4C66-A2F8-6137DE9EF8AC",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:tianocore:edk2:201905:*:*:*:*:*:*:*",
              "matchCriteriaId": "5A3F577A-A397-4185-B477-C31065B6F598",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:tianocore:edk2:201908:*:*:*:*:*:*:*",
              "matchCriteriaId": "76E6EC0C-BA9E-47AD-9A8E-D40BE97CAAFA",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:tianocore:edk2:201911:*:*:*:*:*:*:*",
              "matchCriteriaId": "B2AFB7F1-63CF-4E11-8FD5-1E8D054616CF",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:tianocore:edk2:202002:*:*:*:*:*:*:*",
              "matchCriteriaId": "02217318-D1DB-41BB-BE48-89BC3F0FA38C",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:tianocore:edk2:202005:*:*:*:*:*:*:*",
              "matchCriteriaId": "5193EFCE-3330-48FA-8C63-4CE328A2D339",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:tianocore:edk2:202008:*:*:*:*:*:*:*",
              "matchCriteriaId": "1C45BEB6-1F89-4813-B2CF-90639F9CE525",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:tianocore:edk2:202011:*:*:*:*:*:*:*",
              "matchCriteriaId": "C76CE4FB-3BDE-464B-9807-093839D6DB24",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:tianocore:edk2:202102:*:*:*:*:*:*:*",
              "matchCriteriaId": "063761E2-5C4D-480F-90FE-41D5ECC35E94",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:tianocore:edk2:202105:*:*:*:*:*:*:*",
              "matchCriteriaId": "07F01519-D5C8-4BEE-A89B-8090F9A415CF",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A BIOS bug in firmware for a particular PC model leaves the Platform authorization value empty. This can be used to permanently brick the TPM in multiple ways, as well as to non-permanently DoS the system."
    },
    {
      "lang": "es",
      "value": "Un error de la BIOS en el firmware de un determinado modelo de PC deja vac\u00edo el valor de autorizaci\u00f3n de la plataforma. Esto puede ser usado para brickear permanentemente el TPM de m\u00faltiples maneras, as\u00ed como para DoS no permanente del sistema"
    }
  ],
  "id": "CVE-2021-38576",
  "lastModified": "2026-06-17T04:02:23.653",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 7.8,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 6.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2022-01-03T22:15:09.903",
  "references": [
    {
      "source": "infosec@edk2.groups.io",
      "tags": [
        "Issue Tracking",
        "Permissions Required",
        "Third Party Advisory"
      ],
      "url": "https://bugzilla.tianocore.org/show_bug.cgi?id=3499"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Issue Tracking",
        "Permissions Required",
        "Third Party Advisory"
      ],
      "url": "https://bugzilla.tianocore.org/show_bug.cgi?id=3499"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.debian.org/debian-lts-announce/2025/06/msg00007.html"
    }
  ],
  "sourceIdentifier": "infosec@edk2.groups.io",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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