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FKIE_CVE-2018-5506

Vulnerability from fkie_nvd - Published: 2018-04-13 13:29 - Updated: 2026-06-17 02:00
Summary
In F5 BIG-IP 13.0.0, 12.1.0-12.1.2, 11.6.1, 11.5.1-11.5.5, or 11.2.1 the Apache modules apache_auth_token_mod and mod_auth_f5_auth_token.cpp allow possible unauthenticated bruteforce on the em_server_ip authorization parameter to obtain which SSL client certificates used for mutual authentication between BIG-IQ or Enterprise Manager (EM) and managed BIG-IP devices.
Impacted products
Vendor Product Version
f5 big-ip_local_traffic_manager *
f5 big-ip_local_traffic_manager *
f5 big-ip_local_traffic_manager 11.2.1
f5 big-ip_local_traffic_manager 11.6.1
f5 big-ip_local_traffic_manager 13.0.0
f5 big-ip_application_acceleration_manager *
f5 big-ip_application_acceleration_manager *
f5 big-ip_application_acceleration_manager 11.2.1
f5 big-ip_application_acceleration_manager 11.6.1
f5 big-ip_application_acceleration_manager 13.0.0
f5 big-ip_advanced_firewall_manager *
f5 big-ip_advanced_firewall_manager *
f5 big-ip_advanced_firewall_manager 11.2.1
f5 big-ip_advanced_firewall_manager 11.6.1
f5 big-ip_advanced_firewall_manager 13.0.0
f5 big-ip_analytics *
f5 big-ip_analytics *
f5 big-ip_analytics 11.2.1
f5 big-ip_analytics 11.6.1
f5 big-ip_analytics 13.0.0
f5 big-ip_access_policy_manager *
f5 big-ip_access_policy_manager *
f5 big-ip_access_policy_manager 11.2.1
f5 big-ip_access_policy_manager 11.6.1
f5 big-ip_access_policy_manager 13.0.0
f5 big-ip_application_security_manager *
f5 big-ip_application_security_manager *
f5 big-ip_application_security_manager 11.2.1
f5 big-ip_application_security_manager 11.6.1
f5 big-ip_application_security_manager 13.0.0
f5 big-ip_edge_gateway *
f5 big-ip_edge_gateway *
f5 big-ip_edge_gateway 11.2.1
f5 big-ip_edge_gateway 11.6.1
f5 big-ip_edge_gateway 13.0.0
f5 big-ip_global_traffic_manager *
f5 big-ip_global_traffic_manager *
f5 big-ip_global_traffic_manager 11.2.1
f5 big-ip_global_traffic_manager 11.6.1
f5 big-ip_global_traffic_manager 13.0.0
f5 big-ip_link_controller *
f5 big-ip_link_controller *
f5 big-ip_link_controller 11.2.1
f5 big-ip_link_controller 11.6.1
f5 big-ip_link_controller 13.0.0
f5 big-ip_policy_enforcement_manager *
f5 big-ip_policy_enforcement_manager *
f5 big-ip_policy_enforcement_manager 11.2.1
f5 big-ip_policy_enforcement_manager 11.6.1
f5 big-ip_policy_enforcement_manager 13.0.0
f5 big-ip_webaccelerator *
f5 big-ip_webaccelerator *
f5 big-ip_webaccelerator 11.2.1
f5 big-ip_webaccelerator 11.6.1
f5 big-ip_webaccelerator 13.0.0
f5 big-ip_websafe *
f5 big-ip_websafe *
f5 big-ip_websafe 11.2.1
f5 big-ip_websafe 11.6.1
f5 big-ip_websafe 13.0.0
f5 big-ip_domain_name_system *
f5 big-ip_domain_name_system *
f5 big-ip_domain_name_system 11.2.1
f5 big-ip_domain_name_system 11.6.1
f5 big-ip_domain_name_system 13.0.0

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          "vendor": "F5 Networks, Inc.",
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      "source": "f5sirt@f5.com"
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              "versionEndIncluding": "11.5.5",
              "versionStartIncluding": "11.5.1",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "76C8BE66-5528-468B-8C07-804E34D9B66A",
              "versionEndIncluding": "12.1.3.1",
              "versionStartIncluding": "12.1.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_websafe:11.2.1:*:*:*:*:*:*:*",
              "matchCriteriaId": "BFD9136F-100A-4747-84B7-33D6D8905DDB",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_websafe:11.6.1:*:*:*:*:*:*:*",
              "matchCriteriaId": "452C59B8-230D-4FC0-B76D-FA6E381E3713",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_websafe:13.0.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "B2E56D76-1A89-46AB-9C17-CB24662FFDE7",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "0B8B038F-8E96-463E-83E9-5D5A6ACD7E9F",
              "versionEndIncluding": "11.5.5",
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            },
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              "vulnerable": true
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          "operator": "OR"
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      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In F5 BIG-IP 13.0.0, 12.1.0-12.1.2, 11.6.1, 11.5.1-11.5.5, or 11.2.1 the Apache modules apache_auth_token_mod and mod_auth_f5_auth_token.cpp allow possible unauthenticated bruteforce on the em_server_ip authorization parameter to obtain which SSL client certificates used for mutual authentication between BIG-IQ or Enterprise Manager (EM) and managed BIG-IP devices."
    },
    {
      "lang": "es",
      "value": "En F5 BIG-IP, en su versi\u00f3n 13.0.0, de la versi\u00f3n 12.1.0a la 12.1.2, la versi\u00f3n 11.6.1, de la versi\u00f3n 11.5.1 a la 11.5.5 o en la versi\u00f3n 11.2.1, los m\u00f3dulos de Apache apache_auth_token_mod y mod_auth_f5_auth_token.cpp permiten un posible ataque de fuerza bruta sin autenticar en el par\u00e1metro de autorizaci\u00f3n em_server_ip para obtener qu\u00e9 certificados de cliente SSL se emplean para autenticaci\u00f3n mutua entre dispositivos BIG-IQ o Enterprise Manager (EM) y dispositivos gestionados BIG-IP."
    }
  ],
  "id": "CVE-2018-5506",
  "lastModified": "2026-06-17T02:00:25.857",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.0,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2018-04-13T13:29:00.627",
  "references": [
    {
      "source": "f5sirt@f5.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.f5.com/csp/article/K65355492"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.f5.com/csp/article/K65355492"
    }
  ],
  "sourceIdentifier": "f5sirt@f5.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "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.

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Detection rules are retrieved from Rulezet.

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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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