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FKIE_CVE-2020-3994

Vulnerability from fkie_nvd - Published: 2020-10-20 17:15 - Updated: 2026-06-17 03:19
Severity
7.4 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Summary
VMware vCenter Server (6.7 before 6.7u3, 6.6 before 6.5u3k) contains a session hijack vulnerability in the vCenter Server Appliance Management Interface update function due to a lack of certificate validation. A malicious actor with network positioning between vCenter Server and an update repository may be able to perform a session hijack when the vCenter Server Appliance Management Interface is used to download vCenter updates.
References
security@vmware.comhttps://www.vmware.com/security/advisories/VMSA-2020-0023.htmlPatch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.vmware.com/security/advisories/VMSA-2020-0023.htmlPatch, Vendor Advisory
Impacted products
Vendor Product Version
vmware cloud_foundation *
vmware vcenter_server 6.5
vmware vcenter_server 6.5
vmware vcenter_server 6.5
vmware vcenter_server 6.5
vmware vcenter_server 6.5
vmware vcenter_server 6.5
vmware vcenter_server 6.5
vmware vcenter_server 6.5
vmware vcenter_server 6.5
vmware vcenter_server 6.5
vmware vcenter_server 6.5
vmware vcenter_server 6.5
vmware vcenter_server 6.5
vmware vcenter_server 6.5
vmware vcenter_server 6.5
vmware vcenter_server 6.5
vmware vcenter_server 6.5
vmware vcenter_server 6.5
vmware vcenter_server 6.5
vmware vcenter_server 6.5
vmware vcenter_server 6.7
vmware vcenter_server 6.7
vmware vcenter_server 6.7
vmware vcenter_server 6.7
vmware vcenter_server 6.7
vmware vcenter_server 6.7
vmware vcenter_server 6.7
vmware vcenter_server 6.7
vmware vcenter_server 6.7
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "vCenter Server",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "vCenter Server (6.7 before 6.7u3, 6.6 before 6.5u3k)"
            }
          ]
        }
      ],
      "source": "security@vmware.com"
    }
  ],
  "configurations": [
    {
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "VMware vCenter Server (6.7 before 6.7u3, 6.6 before 6.5u3k) contains a session hijack vulnerability in the vCenter Server Appliance Management Interface update function due to a lack of certificate validation. A malicious actor with network positioning between vCenter Server and an update repository may be able to perform a session hijack when the vCenter Server Appliance Management Interface is used to download vCenter updates."
    },
    {
      "lang": "es",
      "value": "VMware vCenter Server (versiones 6.7 anteriores a 6.7u3, versiones 6.6 anteriores a 6.5u3k), contiene una vulnerabilidad de secuestro de sesi\u00f3n en la funci\u00f3n de actualizaci\u00f3n de la vCenter Server Appliance Management Interface debido a la falta de comprobaci\u00f3n del certificado.\u0026#xa0;Un actor malicioso con posicionamiento de red entre vCenter Server y un repositorio de actualizaciones puede ser capaz de realizar un secuestro de sesi\u00f3n cuando la vCenter Server Appliance Management Interface es usado para descargar actualizaciones de vCenter"
    }
  ],
  "id": "CVE-2020-3994",
  "lastModified": "2026-06-17T03:19:23.880",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.8,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 4.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-10-20T17:15:12.967",
  "references": [
    {
      "source": "security@vmware.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://www.vmware.com/security/advisories/VMSA-2020-0023.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://www.vmware.com/security/advisories/VMSA-2020-0023.html"
    }
  ],
  "sourceIdentifier": "security@vmware.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-295"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


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.