Vulnerability-Lookup

FKIE_CVE-2021-20376

Vulnerability from fkie_nvd - Published: 2021-10-07 18:15 - Updated: 2026-06-17 03:33

Severity

4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Summary

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.

References

URL	Tags
psirt@us.ibm.com	https://exchange.xforce.ibmcloud.com/vulnerabilities/195568	VDB Entry, Vendor Advisory
psirt@us.ibm.com	https://www.ibm.com/support/pages/node/6496789	Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://exchange.xforce.ibmcloud.com/vulnerabilities/195568	VDB Entry, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.ibm.com/support/pages/node/6496789	Patch, Vendor Advisory

Impacted products

Vendor	Product	Version
ibm	sterling_b2b_integrator	*
ibm	sterling_b2b_integrator	*
ibm	sterling_b2b_integrator	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Sterling File Gateway",
          "vendor": "IBM",
          "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"
            }
          ]
        }
      ],
      "source": "psirt@us.ibm.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:ibm:sterling_b2b_integrator:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C893D1D7-595B-4F18-9B8D-26B147381C60",
              "versionEndIncluding": "5.2.6.5_3",
              "versionStartIncluding": "2.2.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:ibm:sterling_b2b_integrator:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2D0AE86C-118E-4C7F-AD75-7D7D857DBAA1",
              "versionEndIncluding": "6.0.3.4",
              "versionStartIncluding": "6.0.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:ibm:sterling_b2b_integrator:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E0BC5C66-A045-428C-97F5-F5383C85AD7F",
              "versionEndIncluding": "6.1.0.1",
              "versionStartIncluding": "6.1.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "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, podr\u00eda 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"
    }
  ],
  "id": "CVE-2021-20376",
  "lastModified": "2026-06-17T03:33:46.053",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "NONE",
          "baseScore": 4.0,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.0"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "psirt@us.ibm.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-10-07T18:15:07.930",
  "references": [
    {
      "source": "psirt@us.ibm.com",
      "tags": [
        "VDB Entry",
        "Vendor Advisory"
      ],
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/195568"
    },
    {
      "source": "psirt@us.ibm.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://www.ibm.com/support/pages/node/6496789"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "VDB Entry",
        "Vendor Advisory"
      ],
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/195568"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://www.ibm.com/support/pages/node/6496789"
    }
  ],
  "sourceIdentifier": "psirt@us.ibm.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-203"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2021-20376 (GCVE-0-2021-20376)

Vulnerability from cvelistv5 – Published: 2021-10-07 18:05 – Updated: 2024-09-17 03:38

Summary

Severity

4.3 (Medium)


                        
                          CVSS:3.0/I:N/AC:L/PR:L/AV:N/UI:N/A:N/C:L/S:U/RL:O/E:U/RC:C

CWE

Obtain Information

Assigner

ibm mitre root

References

2 references

URL	Tags
https://www.ibm.com/support/pages/node/6496789	x_refsource_CONFIRM
https://exchange.xforce.ibmcloud.com/vulnerabilit…	vdb-entryx_refsource_XF

Impacted products

1 product

Vendor	Product	Version
IBM	Sterling File Gateway	Affected: 2.2.0.0 Affected: 6.0.0.0 Affected: 5.2.6.5_3 Affected: 6.0.3.4 Affected: 6.1.0.0 Affected: 6.1.0.1

Date Public

2021-10-06 00:00

Show details on NVD website

JSON

To clipboard

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          "dateUpdated": "2024-08-03T17:37:24.153Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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          {
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              "x_transferred"
            ],
            "url": "https://www.ibm.com/support/pages/node/6496789"
          },
          {
            "name": "ibm-sterling-cve202120376-info-disc (195568)",
            "tags": [
              "vdb-entry",
              "x_refsource_XF",
              "x_transferred"
            ],
            "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/195568"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Sterling File Gateway",
          "vendor": "IBM",
          "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"
            }
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      ],
      "datePublic": "2021-10-06T00:00:00.000Z",
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      "metrics": [
        {
          "cvssV3_0": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
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            "baseSeverity": "MEDIUM",
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            "exploitCodeMaturity": "UNPROVEN",
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            "privilegesRequired": "LOW",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 3.8,
            "temporalSeverity": "LOW",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/I:N/AC:L/PR:L/AV:N/UI:N/A:N/C:L/S:U/RL:O/E:U/RC:C",
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                          {
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                          {
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.