gsd-2024-1931
Vulnerability from gsd
Modified
2024-02-28 06:02
Details
NLnet Labs Unbound version 1.18.0 up to and including version 1.19.1 contain a vulnerability that can cause denial of service by a certain code path that can lead to an infinite loop. Unbound 1.18.0 introduced a feature that removes EDE records from responses with size higher than the client's advertised buffer size. Before removing all the EDE records however, it would try to see if trimming the extra text fields on those records would result in an acceptable size while still retaining the EDE codes. Due to an unchecked condition, the code that trims the text of the EDE records could loop indefinitely. This happens when Unbound would reply with attached EDE information on a positive reply and the client's buffer size is smaller than the needed space to include EDE records. The vulnerability can only be triggered when the 'ede: yes' option is used; non default configuration. From version 1.19.2 on, the code is fixed to avoid looping indefinitely.
Aliases


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{
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2024-1931"
      ],
      "details": "NLnet Labs Unbound version 1.18.0 up to and including version 1.19.1 contain a vulnerability that can cause denial of service by a certain code path that can lead to an infinite loop. Unbound 1.18.0 introduced a feature that removes EDE records from responses with size higher than the client\u0027s advertised buffer size. Before removing all the EDE records however, it would try to see if trimming the extra text fields on those records would result in an acceptable size while still retaining the EDE codes. Due to an unchecked condition, the code that trims the text of the EDE records could loop indefinitely. This happens when Unbound would reply with attached EDE information on a positive reply and the client\u0027s buffer size is smaller than the needed space to include EDE records. The vulnerability can only be triggered when the \u0027ede: yes\u0027 option is used; non default configuration. From version 1.19.2 on, the code is fixed to avoid looping indefinitely.",
      "id": "GSD-2024-1931",
      "modified": "2024-02-28T06:02:29.330997Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "sep@nlnetlabs.nl",
        "ID": "CVE-2024-1931",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Unbound",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_name": "1.18.0",
                          "version_value": "1.19.2"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "NLnet Labs"
            }
          ]
        }
      },
      "credits": [
        {
          "lang": "en",
          "value": "Fredrik Pettai, SUNET"
        },
        {
          "lang": "en",
          "value": "Patrik Lundin, SUNET"
        }
      ],
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "NLnet Labs Unbound version 1.18.0 up to and including version 1.19.1 contain a vulnerability that can cause denial of service by a certain code path that can lead to an infinite loop. Unbound 1.18.0 introduced a feature that removes EDE records from responses with size higher than the client\u0027s advertised buffer size. Before removing all the EDE records however, it would try to see if trimming the extra text fields on those records would result in an acceptable size while still retaining the EDE codes. Due to an unchecked condition, the code that trims the text of the EDE records could loop indefinitely. This happens when Unbound would reply with attached EDE information on a positive reply and the client\u0027s buffer size is smaller than the needed space to include EDE records. The vulnerability can only be triggered when the \u0027ede: yes\u0027 option is used; non default configuration. From version 1.19.2 on, the code is fixed to avoid looping indefinitely."
          }
        ]
      },
      "impact": {
        "cvss": [
          {
            "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"
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "cweId": "CWE-835",
                "lang": "eng",
                "value": "CWE-835 Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://www.nlnetlabs.nl/downloads/unbound/CVE-2024-1931.txt",
            "refsource": "MISC",
            "url": "https://www.nlnetlabs.nl/downloads/unbound/CVE-2024-1931.txt"
          },
          {
            "name": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4VCBRQ7KMSIGBQ6A4SBL5PF326DIJIIV/",
            "refsource": "MISC",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4VCBRQ7KMSIGBQ6A4SBL5PF326DIJIIV/"
          },
          {
            "name": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B2JUIFPA7H75Q2W3VXW2TUNHK6NVGOX4/",
            "refsource": "MISC",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B2JUIFPA7H75Q2W3VXW2TUNHK6NVGOX4/"
          },
          {
            "name": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RBR4H7RCVMJ6H76S4LLRSY5EBFTYWGXK/",
            "refsource": "MISC",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RBR4H7RCVMJ6H76S4LLRSY5EBFTYWGXK/"
          }
        ]
      },
      "solution": [
        {
          "lang": "en",
          "value": "This issue is fixed in 1.19.2 and all later versions. For the vulnerable versions 1.18.0 up to and including 1.19.1, the option \u0027ede: no\u0027 (default configuration) is also a solution as it does not exercise the vulnerable code path."
        }
      ]
    },
    "nvd.nist.gov": {
      "cve": {
        "descriptions": [
          {
            "lang": "en",
            "value": "NLnet Labs Unbound version 1.18.0 up to and including version 1.19.1 contain a vulnerability that can cause denial of service by a certain code path that can lead to an infinite loop. Unbound 1.18.0 introduced a feature that removes EDE records from responses with size higher than the client\u0027s advertised buffer size. Before removing all the EDE records however, it would try to see if trimming the extra text fields on those records would result in an acceptable size while still retaining the EDE codes. Due to an unchecked condition, the code that trims the text of the EDE records could loop indefinitely. This happens when Unbound would reply with attached EDE information on a positive reply and the client\u0027s buffer size is smaller than the needed space to include EDE records. The vulnerability can only be triggered when the \u0027ede: yes\u0027 option is used; non default configuration. From version 1.19.2 on, the code is fixed to avoid looping indefinitely."
          },
          {
            "lang": "es",
            "value": "NLnet Labs Unbound versi\u00f3n 1.18.0 hasta la versi\u00f3n 1.19.1 incluida contiene una vulnerabilidad que puede causar denegaci\u00f3n de servicio mediante una determinada ruta de c\u00f3digo que puede conducir a un bucle infinito. Unbound 1.18.0 introdujo una caracter\u00edstica que elimina los registros EDE de las respuestas con un tama\u00f1o superior al tama\u00f1o de b\u00fafer anunciado por el cliente. Sin embargo, antes de eliminar todos los registros EDE, intentar\u00eda ver si recortar los campos de texto adicionales en esos registros dar\u00eda como resultado un tama\u00f1o aceptable y al mismo tiempo conservar\u00eda los c\u00f3digos EDE. Debido a una condici\u00f3n no marcada, el c\u00f3digo que recorta el texto de los registros EDE podr\u00eda repetirse indefinidamente. Esto sucede cuando Unbound responde con informaci\u00f3n EDE adjunta en una respuesta positiva y el tama\u00f1o del b\u00fafer del cliente es menor que el espacio necesario para incluir registros EDE. La vulnerabilidad s\u00f3lo puede activarse cuando se utiliza la opci\u00f3n \u0027ede: yes\u0027; configuraci\u00f3n no predeterminada. A partir de la versi\u00f3n 1.19.2, el c\u00f3digo se corrige para evitar bucles indefinidos."
          }
        ],
        "id": "CVE-2024-1931",
        "lastModified": "2024-04-28T04:15:11.000",
        "metrics": {
          "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": "sep@nlnetlabs.nl",
              "type": "Secondary"
            }
          ]
        },
        "published": "2024-03-07T10:15:07.037",
        "references": [
          {
            "source": "sep@nlnetlabs.nl",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4VCBRQ7KMSIGBQ6A4SBL5PF326DIJIIV/"
          },
          {
            "source": "sep@nlnetlabs.nl",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B2JUIFPA7H75Q2W3VXW2TUNHK6NVGOX4/"
          },
          {
            "source": "sep@nlnetlabs.nl",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RBR4H7RCVMJ6H76S4LLRSY5EBFTYWGXK/"
          },
          {
            "source": "sep@nlnetlabs.nl",
            "url": "https://www.nlnetlabs.nl/downloads/unbound/CVE-2024-1931.txt"
          }
        ],
        "sourceIdentifier": "sep@nlnetlabs.nl",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-835"
              }
            ],
            "source": "sep@nlnetlabs.nl",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}


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