« Volver al listado

CVE-2021-3746

Estado: ModificadaMedia (6.5)—

A flaw was found in the libtpms code that may cause access beyond the boundary of internal buffers. The vulnerability is triggered by specially-crafted TPM2 command packets that then trigger the issue when the state of the TPM2's volatile state is written. The highest threat from this vulnerability is to system availability. This issue affects libtpms versions before 0.8.5, before 0.7.9 and before 0.6.6.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (3)

Fedoraproject — FedoraLibtpms Project — LibtpmsRedhat — Enterprise Linux

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-3746",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.1,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:C",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 6.9,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "libtpms",
          "versions": [
            {
              "status": "affected",
              "version": "libtpms 0.8.5, libtpms 0.7.9, libtpms 0.6.6"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-10-19T15:15:08.003",
  "references": [
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1998588",
      "tags": [
        "Issue Tracking",
        "Patch",
        "Third Party Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1998588",
      "tags": [
        "Issue Tracking",
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secalert@redhat.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in the libtpms code that may cause access beyond the boundary of internal buffers. The vulnerability is triggered by specially-crafted TPM2 command packets that then trigger the issue when the state of the TPM2's volatile state is written. The highest threat from this vulnerability is to system availability. This issue affects libtpms versions before 0.8.5, before 0.7.9 and before 0.6.6."
    },
    {
      "lang": "es",
      "value": "Se ha encontrado un fallo en el código de libtpms que puede causar un acceso más allá de los límites de los búferes internos. La vulnerabilidad es desencadenada mediante paquetes de comandos del TPM2 especialmente diseñados que luego desencadenan el problema cuando es escrito el estado volátil del TPM2. La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema. Este problema afecta a libtpms versiones anteriores a 0.8.5, 0.7.9 y 0.6.6"
    }
  ],
  "lastModified": "2026-06-17T04:05:41.203",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:libtpms_project:libtpms:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E732D289-1BA4-4F9E-9C55-3FBA9FC1387F",
              "versionEndExcluding": "0.6.6",
              "versionStartIncluding": "0.6.0"
            },
            {
              "criteria": "cpe:2.3:a:libtpms_project:libtpms:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A035D468-60DC-4122-972B-2F6AAFF72E15",
              "versionEndExcluding": "0.7.9",
              "versionStartIncluding": "0.7.0"
            },
            {
              "criteria": "cpe:2.3:a:libtpms_project:libtpms:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "355B2394-4B55-4269-9585-C8BF4462ACDD",
              "versionEndExcluding": "0.8.5",
              "versionStartIncluding": "0.8.0"
            }
          ],
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835"
            }
          ],
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "053C1B35-3869-41C2-9551-044182DE0A64"
            },
            {
              "criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3AA08768-75AF-4791-B229-AE938C780959"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secalert@redhat.com"
}