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CVE-2021-25490

Estado: ModificadaMedia (6)—

Un ataque de degradación de keyblob en keymaster versiones anteriores a SMR Oct-2021 Release 1, permite a un atacante desencadenar una vulnerabilidad de reuso de IV con un proceso privilegiado

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)

Google — Android

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-25490",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 3.6,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "mobile.security@samsung.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:L",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.5,
        "exploitabilityScore": 0.5
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
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          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
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          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 0.8
      }
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  },
  "affected": [
    {
      "source": "mobile.security@samsung.com",
      "affectedData": [
        {
          "vendor": "Samsung Mobile",
          "product": "Samsung Mobile Devices",
          "versions": [
            {
              "status": "affected",
              "version": "P(9.0), Q(10.0), R(11.0)",
              "lessThan": "SMR Oct-2021 Release 1",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-10-06T18:15:09.717",
  "references": [
    {
      "url": "https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=10",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "mobile.security@samsung.com"
    },
    {
      "url": "https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=10",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "mobile.security@samsung.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A keyblob downgrade attack in keymaster prior to SMR Oct-2021 Release 1 allows attacker to trigger IV reuse vulnerability with privileged process."
    },
    {
      "lang": "es",
      "value": "Un ataque de degradación de keyblob en keymaster versiones anteriores a SMR Oct-2021 Release 1, permite a un atacante desencadenar una vulnerabilidad de reuso de IV con un proceso privilegiado"
    }
  ],
  "lastModified": "2026-06-17T03:42:10.860",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:google:android:9.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8DFAAD08-36DA-4C95-8200-C29FE5B6B854"
            },
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              "vulnerable": true,
              "matchCriteriaId": "D558D965-FA70-4822-A770-419E73BA9ED3"
            },
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              "vulnerable": true,
              "matchCriteriaId": "109DD7FD-3A48-4C3D-8E1A-4433B98E1E64"
            }
          ],
          "operator": "OR"
        }
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  ],
  "sourceIdentifier": "mobile.security@samsung.com"
}