« Back to list

CVE-2021-38296

Status: ModifiedHigh (7.5)—

Apache Spark supports end-to-end encryption of RPC connections via "spark.authenticate" and "spark.network.crypto.enabled". In versions 3.1.2 and earlier, it uses a bespoke mutual authentication protocol that allows for full encryption key recovery. After an initial interactive attack, this would allow someone to decrypt plaintext traffic offline. Note that this does not affect security mechanisms controlled by "spark.authenticate.enableSaslEncryption", "spark.io.encryption.enabled", "spark.ssl", "spark.ui.strictTransportSecurity". Update to Apache Spark 3.1.3 or later

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (2)

Apache — SparkOracle — Financial Services Crime AND Compliance Management Studio

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2021-38296",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security@apache.org",
      "affectedData": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache Spark",
          "versions": [
            {
              "status": "affected",
              "version": "up to and including version 3.1.2",
              "versionType": "custom",
              "lessThanOrEqual": "3.1.2"
            }
          ]
        }
      ]
    }
  ],
  "published": "2022-03-10T09:15:07.000",
  "references": [
    {
      "url": "https://lists.apache.org/thread/70x8fw2gx3g9ty7yk0f2f1dlpqml2smd",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ],
      "source": "security@apache.org"
    },
    {
      "url": "https://www.oracle.com/security-alerts/cpujul2022.html",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security@apache.org"
    },
    {
      "url": "https://lists.apache.org/thread/70x8fw2gx3g9ty7yk0f2f1dlpqml2smd",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.oracle.com/security-alerts/cpujul2022.html",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@apache.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-294"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-294"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Apache Spark supports end-to-end encryption of RPC connections via \"spark.authenticate\" and \"spark.network.crypto.enabled\". In versions 3.1.2 and earlier, it uses a bespoke mutual authentication protocol that allows for full encryption key recovery. After an initial interactive attack, this would allow someone to decrypt plaintext traffic offline. Note that this does not affect security mechanisms controlled by \"spark.authenticate.enableSaslEncryption\", \"spark.io.encryption.enabled\", \"spark.ssl\", \"spark.ui.strictTransportSecurity\". Update to Apache Spark 3.1.3 or later"
    },
    {
      "lang": "es",
      "value": "Apache Spark soporta el cifrado de extremo a extremo de las conexiones RPC por medio de \"spark.authenticate\" y \"spark.network.crypto.enabled\". En versiones 3.1.2 y anteriores, usa un protocolo de autenticación mutua a medida que permite la recuperación total de la clave de cifrado. Después de un ataque interactivo inicial, esto permitiría a alguien descifrar el tráfico de texto plano fuera de línea. Tenga en cuenta que esto no afecta a los mecanismos de seguridad controlados por \"spark.authenticate.enableSaslEncryption\", \"spark.io.encryption.enabled\", \"spark.ssl\", \"spark.ui.strictTransportSecurity\". Actualice a Apache Spark versión 3.1.3 o posterior"
    }
  ],
  "lastModified": "2026-06-17T04:01:49.240",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:apache:spark:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "064126C5-A909-4417-A1C6-A9D50375F926",
              "versionEndExcluding": "3.1.3"
            }
          ],
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:oracle:financial_services_crime_and_compliance_management_studio:8.0.8.2.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "55F091C7-0869-4FD6-AC73-DA697D990304"
            },
            {
              "criteria": "cpe:2.3:a:oracle:financial_services_crime_and_compliance_management_studio:8.0.8.3.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4D134C60-F9E2-46C2-8466-DB90AD98439E"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@apache.org"
}