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CVE-2021-27098

Estado: ModificadaAlta (8.1)—

In SPIRE 0.8.1 through 0.8.4 and before versions 0.9.4, 0.10.2, 0.11.3 and 0.12.1, specially crafted requests to the FetchX509SVID RPC of SPIRE Server’s Legacy Node API can result in the possible issuance of an X.509 certificate with a URI SAN for a SPIFFE ID that the agent is not authorized to distribute. Proper controls are in place to require that the caller presents a valid agent certificate that is already authorized to issue at least one SPIFFE ID, and the requested SPIFFE ID belongs to the same trust domain, prior to being able to trigger this vulnerability. This issue has been fixed in SPIRE versions 0.8.5, 0.9.4, 0.10.2, 0.11.3 and 0.12.1.

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 (1)

Cncf — Spire

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-27098",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.1,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-03-05T17:15:14.920",
  "references": [
    {
      "url": "https://github.com/spiffe/spire/security/advisories/GHSA-h746-rm5q-8mgq",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/spiffe/spire/security/advisories/GHSA-h746-rm5q-8mgq",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-295"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In SPIRE 0.8.1 through 0.8.4 and before versions 0.9.4, 0.10.2, 0.11.3 and 0.12.1, specially crafted requests to the FetchX509SVID RPC of SPIRE Server’s Legacy Node API can result in the possible issuance of an X.509 certificate with a URI SAN for a SPIFFE ID that the agent is not authorized to distribute. Proper controls are in place to require that the caller presents a valid agent certificate that is already authorized to issue at least one SPIFFE ID, and the requested SPIFFE ID belongs to the same trust domain, prior to being able to trigger this vulnerability. This issue has been fixed in SPIRE versions 0.8.5, 0.9.4, 0.10.2, 0.11.3 and 0.12.1."
    },
    {
      "lang": "es",
      "value": "En SPIRE versiones 0.8.1 hasta 0.8.4 y versiones anteriores a 0.9.4, 0.10.2, 0.11.3 y 0.12.1, unas peticiones especialmente diseñadas para FetchX509SVID RPC de la API del Legacy Node de SPIRE Server, pueden resultar en una posible emisión de un Certificado X.509 con un URI SAN para un ID de SPIFFE que el agente no está autorizado a distribuir. Se presentan controles apropiados para requerir que la persona que llama presente un certificado de agente válido que ya esté autorizado para emitir al menos un ID de SPIFFE, y que el ID de SPIFFE pedido pertenezca al mismo dominio confiable, antes de poder desencadenar esta vulnerabilidad. Este problema ha sido corregido en versiones 0.8.5, 0.9.4, 0.10.2, 0.11.3 y 0.12.1 de SPIRE"
    }
  ],
  "lastModified": "2026-06-17T03:44:17.403",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:cncf:spire:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "53FC0C26-EC3F-45EE-ADAC-FC283813FBE1",
              "versionEndIncluding": "0.8.4",
              "versionStartIncluding": "0.8.1"
            },
            {
              "criteria": "cpe:2.3:a:cncf:spire:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E7436751-C627-4143-A890-8B04D9C6642D",
              "versionEndExcluding": "0.9.4",
              "versionStartIncluding": "0.9.0"
            },
            {
              "criteria": "cpe:2.3:a:cncf:spire:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E330A728-6B22-4C71-B37A-119BD2D3EADB",
              "versionEndExcluding": "0.10.2",
              "versionStartIncluding": "0.10.0"
            },
            {
              "criteria": "cpe:2.3:a:cncf:spire:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EA57458D-53C5-4E8D-AFC2-D56826904304",
              "versionEndExcluding": "0.11.3",
              "versionStartIncluding": "0.11.0"
            },
            {
              "criteria": "cpe:2.3:a:cncf:spire:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F05F1090-6FFC-4C74-B9D3-D63B3259A46A",
              "versionEndExcluding": "0.12.1",
              "versionStartIncluding": "0.12.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}