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CVE-2021-20376

Estado: ModificadaMedia (4.3)—

IBM Sterling File Gateway 2.2.0.0 through 6.1.1.0 could allow an authenticated attacker to enumerate usernames due to there being an observable discrepancy in returned messages. IBM X-Force ID: 195568.

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)

IBM — Sterling B2B Integrator

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-20376",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:N/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Secondary",
        "source": "psirt@us.ibm.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 4.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 4.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "psirt@us.ibm.com",
      "affectedData": [
        {
          "vendor": "IBM",
          "product": "Sterling File Gateway",
          "versions": [
            {
              "status": "affected",
              "version": "2.2.0.0"
            },
            {
              "status": "affected",
              "version": "6.0.0.0"
            },
            {
              "status": "affected",
              "version": "5.2.6.5_3"
            },
            {
              "status": "affected",
              "version": "6.0.3.4"
            },
            {
              "status": "affected",
              "version": "6.1.0.0"
            },
            {
              "status": "affected",
              "version": "6.1.0.1"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-10-07T18:15:07.930",
  "references": [
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/195568",
      "tags": [
        "VDB Entry",
        "Vendor Advisory"
      ],
      "source": "psirt@us.ibm.com"
    },
    {
      "url": "https://www.ibm.com/support/pages/node/6496789",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "psirt@us.ibm.com"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/195568",
      "tags": [
        "VDB Entry",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.ibm.com/support/pages/node/6496789",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-203"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "IBM Sterling File Gateway 2.2.0.0 through 6.1.1.0 could allow an authenticated attacker to enumerate usernames due to there being an observable discrepancy in returned messages. IBM X-Force ID: 195568."
    },
    {
      "lang": "es",
      "value": "IBM Sterling File Gateway versiones 2.2.0.0 hasta 6.1.1.0, podría permitir a un atacante autenticado enumerar nombres de usuario debido a que se presenta una discrepancia observable en los mensajes devueltos. IBM X-Force ID: 195568"
    }
  ],
  "lastModified": "2026-06-17T03:33:46.053",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:ibm:sterling_b2b_integrator:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C893D1D7-595B-4F18-9B8D-26B147381C60",
              "versionEndIncluding": "5.2.6.5_3",
              "versionStartIncluding": "2.2.0.0"
            },
            {
              "criteria": "cpe:2.3:a:ibm:sterling_b2b_integrator:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2D0AE86C-118E-4C7F-AD75-7D7D857DBAA1",
              "versionEndIncluding": "6.0.3.4",
              "versionStartIncluding": "6.0.0.0"
            },
            {
              "criteria": "cpe:2.3:a:ibm:sterling_b2b_integrator:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E0BC5C66-A045-428C-97F5-F5383C85AD7F",
              "versionEndIncluding": "6.1.0.1",
              "versionStartIncluding": "6.1.0.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "psirt@us.ibm.com"
}