ncsc-2025-0341
Vulnerability from csaf_ncscnl
Published
2025-10-24 08:19
Modified
2025-10-27 08:24
Summary
Kwetsbaarheden verholpen in BIND 9

Notes

The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions: NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein. NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory. This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings.
Feiten
ISC heeft kwetsbaarheden verholpen in BIND 9 (Specifiek voor versies 9.16.0 tot 9.16.50, 9.18.0 tot 9.18.39, 9.20.0 tot 9.20.13, en 9.21.0 tot 9.21.12).
Interpretaties
De kwetsbaarheden bevinden zich in de DNS-resolvers van BIND 9. De eerste kwetsbaarheid stelt aanvallers in staat om vervalste DNS-records in de cache te injecteren, wat kan leiden tot het omleiden van clients naar kwaadaardige domeinen. Een tweede kwetsbaarheid is gerelateerd aan een zwakte in de Pseudo Random Number Generator (PRNG), waardoor aanvallers bronpoorten en query-ID's kunnen voorspellen, wat kan leiden tot cache poisoning aanvallen. De derde kwetsbaarheid laat ongeauthenticeerde aanvallers toe om misvormde DNSKEY-records te verzenden, wat resulteert in aanzienlijke CPU-uitputting en kan leiden tot een denial-of-service voor legitieme clients. Deze kwetsbaarheden zijn vooral zorgwekkend voor omgevingen die afhankelijk zijn van de specifieke versies van BIND 9. **update** Onderzoekers hebben Proof-of-Concept-code (PoC) gepubliceerd waarmee de kwetsbaarheid kan worden aangetoond in een laboratoriumopstelling waarbij de onderzoeker het BIND9-systeem zelf onder controle heeft. Op dit moment wordt (nog) geen actief misbruik waargenomen. Het NCSC verwacht echter dat op korte termijn de PoC omgezet zal worden door kwaadwillenden in werkende code, waarmee cache-poisoning realistisch wordt. Vooralsnog is het onwaarschijnlijk dat de BIND-server zelf gecompromitteerd kan worden. De mogelijke schade is cache-poisoning. Hierbij gaat de DNS verkeerde antwoorden geven, waardoor kwaadwillenden slachtoffers naar malafide servers kunnen leiden.
Oplossingen
ISC heeft updates uitgebracht om de kwetsbaarheden te verhelpen. Zie bijgevoegde referenties voor meer informatie.
Kans
medium
Schade
high
CWE-338
Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
CWE-341
Predictable from Observable State
CWE-347
Improper Verification of Cryptographic Signature
CWE-349
Acceptance of Extraneous Untrusted Data With Trusted Data
CWE-400
Uncontrolled Resource Consumption
CWE-405
Asymmetric Resource Consumption (Amplification)


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{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "nl",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions:\n\n    NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein.\n\n    NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory.\n    This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
      },
      {
        "category": "description",
        "text": "ISC heeft kwetsbaarheden verholpen in BIND 9 (Specifiek voor versies 9.16.0 tot 9.16.50, 9.18.0 tot 9.18.39, 9.20.0 tot 9.20.13, en 9.21.0 tot 9.21.12).",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "De kwetsbaarheden bevinden zich in de DNS-resolvers van BIND 9. De eerste kwetsbaarheid stelt aanvallers in staat om vervalste DNS-records in de cache te injecteren, wat kan leiden tot het omleiden van clients naar kwaadaardige domeinen. Een tweede kwetsbaarheid is gerelateerd aan een zwakte in de Pseudo Random Number Generator (PRNG), waardoor aanvallers bronpoorten en query-ID\u0027s kunnen voorspellen, wat kan leiden tot cache poisoning aanvallen. De derde kwetsbaarheid laat ongeauthenticeerde aanvallers toe om misvormde DNSKEY-records te verzenden, wat resulteert in aanzienlijke CPU-uitputting en kan leiden tot een denial-of-service voor legitieme clients. Deze kwetsbaarheden zijn vooral zorgwekkend voor omgevingen die afhankelijk zijn van de specifieke versies van BIND 9.\n\n**update**\n\nOnderzoekers hebben Proof-of-Concept-code (PoC) gepubliceerd waarmee de kwetsbaarheid kan worden aangetoond in een laboratoriumopstelling waarbij de onderzoeker het BIND9-systeem zelf onder controle heeft. Op dit moment wordt (nog) geen actief misbruik waargenomen. Het NCSC verwacht echter dat op korte termijn de PoC omgezet zal worden door kwaadwillenden in werkende code, waarmee cache-poisoning realistisch wordt.\nVooralsnog is het onwaarschijnlijk dat de BIND-server zelf gecompromitteerd kan worden. De mogelijke schade is cache-poisoning. Hierbij gaat de DNS verkeerde antwoorden geven, waardoor kwaadwillenden slachtoffers naar malafide servers kunnen leiden.",
        "title": "Interpretaties"
      },
      {
        "category": "description",
        "text": "ISC heeft updates uitgebracht om de kwetsbaarheden te verhelpen. Zie bijgevoegde referenties voor meer informatie.",
        "title": "Oplossingen"
      },
      {
        "category": "general",
        "text": "medium",
        "title": "Kans"
      },
      {
        "category": "general",
        "text": "high",
        "title": "Schade"
      },
      {
        "category": "general",
        "text": "Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)",
        "title": "CWE-338"
      },
      {
        "category": "general",
        "text": "Predictable from Observable State",
        "title": "CWE-341"
      },
      {
        "category": "general",
        "text": "Improper Verification of Cryptographic Signature",
        "title": "CWE-347"
      },
      {
        "category": "general",
        "text": "Acceptance of Extraneous Untrusted Data With Trusted Data",
        "title": "CWE-349"
      },
      {
        "category": "general",
        "text": "Uncontrolled Resource Consumption",
        "title": "CWE-400"
      },
      {
        "category": "general",
        "text": "Asymmetric Resource Consumption (Amplification)",
        "title": "CWE-405"
      }
    ],
    "publisher": {
      "category": "coordinator",
      "contact_details": "cert@ncsc.nl",
      "name": "Nationaal Cyber Security Centrum",
      "namespace": "https://www.ncsc.nl/"
    },
    "references": [
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://kb.isc.org/docs/cve-2025-40778"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://kb.isc.org/docs/cve-2025-40780"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://kb.isc.org/docs/cve-2025-8677"
      }
    ],
    "title": "Kwetsbaarheden verholpen in BIND 9",
    "tracking": {
      "current_release_date": "2025-10-27T08:24:03.796638Z",
      "generator": {
        "date": "2025-08-04T16:30:00Z",
        "engine": {
          "name": "V.A.",
          "version": "1.3"
        }
      },
      "id": "NCSC-2025-0341",
      "initial_release_date": "2025-10-24T08:19:45.232307Z",
      "revision_history": [
        {
          "date": "2025-10-24T08:19:45.232307Z",
          "number": "1.0.0",
          "summary": "Initiele versie"
        },
        {
          "date": "2025-10-27T08:24:03.796638Z",
          "number": "1.0.1",
          "summary": "Er is Proof-of-Concept-code verschenen waarmee de kwetsbaarheid kan worden aangetoond."
        }
      ],
      "status": "final",
      "version": "1.0.1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:unknown/*",
                "product": {
                  "name": "vers:unknown/*",
                  "product_id": "CSAFPID-1"
                }
              }
            ],
            "category": "product_name",
            "name": "BIND 9"
          }
        ],
        "category": "vendor",
        "name": "ISC"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-40778",
      "cwe": {
        "id": "CWE-349",
        "name": "Acceptance of Extraneous Untrusted Data With Trusted Data"
      },
      "notes": [
        {
          "category": "other",
          "text": "Acceptance of Extraneous Untrusted Data With Trusted Data",
          "title": "CWE-349"
        },
        {
          "category": "other",
          "text": "Improper Verification of Cryptographic Signature",
          "title": "CWE-347"
        },
        {
          "category": "description",
          "text": "A vulnerability in specific versions of BIND 9\u0027s DNS resolver allows cache injection of forged DNS records, posing a risk of redirecting clients to malicious domains, classified as Important due to limited impact.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2025-40778 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2025/cve-2025-40778.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2025-40778"
    },
    {
      "cve": "CVE-2025-40780",
      "cwe": {
        "id": "CWE-341",
        "name": "Predictable from Observable State"
      },
      "notes": [
        {
          "category": "other",
          "text": "Predictable from Observable State",
          "title": "CWE-341"
        },
        {
          "category": "other",
          "text": "Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)",
          "title": "CWE-338"
        },
        {
          "category": "description",
          "text": "A vulnerability in BIND resolvers due to a PRNG weakness allows attackers to predict source ports and query IDs, potentially leading to cache poisoning attacks in specific BIND 9 versions.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2025-40780 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2025/cve-2025-40780.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2025-40780"
    },
    {
      "cve": "CVE-2025-8677",
      "cwe": {
        "id": "CWE-405",
        "name": "Asymmetric Resource Consumption (Amplification)"
      },
      "notes": [
        {
          "category": "other",
          "text": "Asymmetric Resource Consumption (Amplification)",
          "title": "CWE-405"
        },
        {
          "category": "other",
          "text": "Uncontrolled Resource Consumption",
          "title": "CWE-400"
        },
        {
          "category": "description",
          "text": "A vulnerability in specific versions of BIND 9 resolvers allows remote attackers to exhaust CPU resources via malformed DNSKEY records, potentially causing denial of service for legitimate clients.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2025-8677 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2025/cve-2025-8677.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2025-8677"
    }
  ]
}


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