FKIE_CVE-2020-5921

Vulnerability from fkie_nvd - Published: 2020-08-26 16:15 - Updated: 2026-06-17 03:22
Summary
in BIG-IP versions 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, 14.1.0-14.1.2.6, 13.1.0-13.1.3.4, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.2, Syn flood causes large number of MCPD context messages destined to secondary blades consuming memory leading to MCPD failure. This issue affects only VIPRION hosts with two or more blades installed. Single-blade VIPRION hosts are not affected.
Impacted products
Vendor Product Version
f5 big-ip_access_policy_manager *
f5 big-ip_access_policy_manager *
f5 big-ip_access_policy_manager *
f5 big-ip_access_policy_manager *
f5 big-ip_advanced_firewall_manager *
f5 big-ip_advanced_firewall_manager *
f5 big-ip_advanced_firewall_manager *
f5 big-ip_advanced_firewall_manager *
f5 big-ip_analytics *
f5 big-ip_analytics *
f5 big-ip_analytics *
f5 big-ip_analytics *
f5 big-ip_application_acceleration_manager *
f5 big-ip_application_acceleration_manager *
f5 big-ip_application_acceleration_manager *
f5 big-ip_application_acceleration_manager *
f5 big-ip_application_security_manager *
f5 big-ip_application_security_manager *
f5 big-ip_application_security_manager *
f5 big-ip_application_security_manager *
f5 big-ip_domain_name_system *
f5 big-ip_domain_name_system *
f5 big-ip_domain_name_system *
f5 big-ip_domain_name_system *
f5 big-ip_fraud_protection_service *
f5 big-ip_fraud_protection_service *
f5 big-ip_fraud_protection_service *
f5 big-ip_fraud_protection_service *
f5 big-ip_global_traffic_manager *
f5 big-ip_global_traffic_manager *
f5 big-ip_global_traffic_manager *
f5 big-ip_global_traffic_manager *
f5 big-ip_link_controller *
f5 big-ip_link_controller *
f5 big-ip_link_controller *
f5 big-ip_link_controller *
f5 big-ip_local_traffic_manager *
f5 big-ip_local_traffic_manager *
f5 big-ip_local_traffic_manager *
f5 big-ip_local_traffic_manager *
f5 big-ip_policy_enforcement_manager *
f5 big-ip_policy_enforcement_manager *
f5 big-ip_policy_enforcement_manager *
f5 big-ip_policy_enforcement_manager *

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "BIG-IP",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "15.1.0-15.1.0.4, 15.0.0-15.0.1.3, 14.1.0-14.1.2.6, 13.1.0-13.1.3.4, 12.1.0-12.1.5.1, 11.6.1-11.6.5.2"
            }
          ]
        }
      ],
      "source": "f5sirt@f5.com"
    }
  ],
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          "negate": false,
          "operator": "OR"
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      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "in BIG-IP versions 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, 14.1.0-14.1.2.6, 13.1.0-13.1.3.4, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.2, Syn flood causes large number of MCPD context messages destined to secondary blades consuming memory leading to MCPD failure. This issue affects only VIPRION hosts with two or more blades installed. Single-blade VIPRION hosts are not affected."
    },
    {
      "lang": "es",
      "value": "En BIG-IP versiones 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, 14.1.0-14.1.2.6, 13.1.0-13.1.3.4, 12.1.0-12.1.5.1 y 11.6.1- 11.6.5.2, una inundaci\u00f3n Syn provoca una gran cantidad de mensajes de contexto de MCPD destinados a blades secundarios que consumen memoria y provocan fallos MCPD. Este problema afecta solo a los hosts VIPRION con dos o m\u00e1s blades instalados. Los hosts VIPRION de un blade \u00fanico no est\u00e1n afectados"
    }
  ],
  "id": "CVE-2020-5921",
  "lastModified": "2026-06-17T03:22:27.657",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-08-26T16:15:12.823",
  "references": [
    {
      "source": "f5sirt@f5.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.f5.com/csp/article/K00103216"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.f5.com/csp/article/K00103216"
    }
  ],
  "sourceIdentifier": "f5sirt@f5.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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  • 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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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Events included in the timeline

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    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.