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FKIE_CVE-2018-5743

Vulnerability from fkie_nvd - Published: 2019-10-09 16:15 - Updated: 2026-06-17 02:00
Summary
By design, BIND is intended to limit the number of TCP clients that can be connected at any given time. The number of allowed connections is a tunable parameter which, if unset, defaults to a conservative value for most servers. Unfortunately, the code which was intended to limit the number of simultaneous connections contained an error which could be exploited to grow the number of simultaneous connections beyond this limit. Versions affected: BIND 9.9.0 -> 9.10.8-P1, 9.11.0 -> 9.11.6, 9.12.0 -> 9.12.4, 9.14.0. BIND 9 Supported Preview Edition versions 9.9.3-S1 -> 9.11.5-S3, and 9.11.5-S5. Versions 9.13.0 -> 9.13.7 of the 9.13 development branch are also affected. Versions prior to BIND 9.9.0 have not been evaluated for vulnerability to CVE-2018-5743.
Impacted products
Vendor Product Version
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_local_traffic_manager 15.0.0
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_acceleration_manager 15.0.0
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_advanced_firewall_manager 15.0.0
f5 big-ip_analytics *
f5 big-ip_analytics *
f5 big-ip_analytics *
f5 big-ip_analytics *
f5 big-ip_analytics 15.0.0
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_access_policy_manager 15.0.0
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_application_security_manager 15.0.0
f5 big-ip_edge_gateway *
f5 big-ip_edge_gateway *
f5 big-ip_edge_gateway *
f5 big-ip_edge_gateway *
f5 big-ip_edge_gateway 15.0.0
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_fraud_protection_service 15.0.0
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_global_traffic_manager 15.0.0
f5 big-ip_link_controller *
f5 big-ip_link_controller *
f5 big-ip_link_controller *
f5 big-ip_link_controller *
f5 big-ip_link_controller 15.0.0
f5 big-ip_webaccelerator *
f5 big-ip_webaccelerator *
f5 big-ip_webaccelerator *
f5 big-ip_webaccelerator *
f5 big-ip_webaccelerator 15.0.0
f5 big-ip_policy_enforcement_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 15.0.0
isc bind *
isc bind *
isc bind *
isc bind *
isc bind 9.9.3
isc bind 9.10.8
isc bind 9.11.5
isc bind 9.11.5
isc bind 9.14.0
f5 enterprise_manager 3.1.1
f5 big-iq_centralized_management *
f5 big-iq_centralized_management *
f5 iworkflow 2.3.0
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_domain_name_system 15.0.0

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          "vendor": "ISC",
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              "status": "affected",
              "version": "BIND 9.9.0 -\u003e 9.10.8-P1, 9.11.0 -\u003e 9.11.6, 9.12.0 -\u003e 9.12.4, 9.14.0. BIND 9 Supported Preview Edition versions 9.9.3-S1 -\u003e 9.11.5-S3, and 9.11.5-S5. Versions 9.13.0 -\u003e 9.13.7 of the 9.13 development branch are also affected. Versions prior to BIND 9.9.0 have not been evaluated for vulnerability to CVE-2018-5743."
            }
          ]
        }
      ],
      "source": "security-officer@isc.org"
    }
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      "lang": "en",
      "value": "By design, BIND is intended to limit the number of TCP clients that can be connected at any given time. The number of allowed connections is a tunable parameter which, if unset, defaults to a conservative value for most servers. Unfortunately, the code which was intended to limit the number of simultaneous connections contained an error which could be exploited to grow the number of simultaneous connections beyond this limit. Versions affected: BIND 9.9.0 -\u003e 9.10.8-P1, 9.11.0 -\u003e 9.11.6, 9.12.0 -\u003e 9.12.4, 9.14.0. BIND 9 Supported Preview Edition versions 9.9.3-S1 -\u003e 9.11.5-S3, and 9.11.5-S5. Versions 9.13.0 -\u003e 9.13.7 of the 9.13 development branch are also affected. Versions prior to BIND 9.9.0 have not been evaluated for vulnerability to CVE-2018-5743."
    },
    {
      "lang": "es",
      "value": "Por dise\u00f1o, BIND est\u00e1 destinado a limitar el n\u00famero de clientes TCP que pueden ser conectados en un momento dado. El n\u00famero de conexiones permitidas es un par\u00e1metro sintonizable que, si no se encuentra configurado, por defecto es un valor conservador para la mayor\u00eda de los servidores. Desafortunadamente, el c\u00f3digo que estaba destinado a limitar el n\u00famero de conexiones simult\u00e1neas conten\u00eda un error que podr\u00eda ser explotado para aumentar el n\u00famero de conexiones simult\u00e1neas m\u00e1s all\u00e1 de este l\u00edmite. Versiones afectadas: BIND 9.9.0 hasta 9.10.8-P1, 9.11.0 hasta 9.11.6, 9.12.0 hasta 9.12.4, 9.14.0. BIND 9 Supported Preview Edition versiones 9.9.3-S1 hasta 9.11.5-S3 y 9.11.5-S5. Las versiones 9.13.0 hasta 9.13.7 de la rama de desarrollo 9.13 tambi\u00e9n est\u00e1n afectadas. Las versiones anteriores a BIND 9.9.0 no han sido evaluadas para la vulnerabilidad de CVE-2018-5743."
    }
  ],
  "id": "CVE-2018-5743",
  "lastModified": "2026-06-17T02:00:42.250",
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        "baseSeverity": "MEDIUM",
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          "confidentialityImpact": "NONE",
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          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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        "type": "Secondary"
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  "published": "2019-10-09T16:15:13.763",
  "references": [
    {
      "source": "security-officer@isc.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://kb.isc.org/docs/cve-2018-5743"
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      "url": "https://support.f5.com/csp/article/K74009656?utm_source=f5support\u0026amp%3Butm_medium=RSS"
    },
    {
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      "url": "https://www.synology.com/security/advisory/Synology_SA_19_20"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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    },
    {
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      "url": "https://www.synology.com/security/advisory/Synology_SA_19_20"
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  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
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      ],
      "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

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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.
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  • 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.

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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.


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