GSD-2020-8621

Vulnerability from gsd - Updated: 2023-12-13 01:21
Details
In BIND 9.14.0 -> 9.16.5, 9.17.0 -> 9.17.3, If a server is configured with both QNAME minimization and 'forward first' then an attacker who can send queries to it may be able to trigger the condition that will cause the server to crash. Servers that 'forward only' are not affected.
Aliases
Aliases
CVE-2020-8621
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{
  "GSD": {
    "alias": "CVE-2020-8621",
    "description": "In BIND 9.14.0 -\u003e 9.16.5, 9.17.0 -\u003e 9.17.3, If a server is configured with both QNAME minimization and \u0027forward first\u0027 then an attacker who can send queries to it may be able to trigger the condition that will cause the server to crash. Servers that \u0027forward only\u0027 are not affected.",
    "id": "GSD-2020-8621",
    "references": [
      "https://www.suse.com/security/cve/CVE-2020-8621.html",
      "https://ubuntu.com/security/CVE-2020-8621"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-8621"
      ],
      "details": "In BIND 9.14.0 -\u003e 9.16.5, 9.17.0 -\u003e 9.17.3, If a server is configured with both QNAME minimization and \u0027forward first\u0027 then an attacker who can send queries to it may be able to trigger the condition that will cause the server to crash. Servers that \u0027forward only\u0027 are not affected.",
      "id": "GSD-2020-8621",
      "modified": "2023-12-13T01:21:53.557351Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security-officer@isc.org",
        "DATE_PUBLIC": "2020-08-20T18:35:08.000Z",
        "ID": "CVE-2020-8621",
        "STATE": "PUBLIC",
        "TITLE": "Attempting QNAME minimization after forwarding can lead to an assertion failure in resolver.c"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "BIND9",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003e=",
                          "version_name": "",
                          "version_value": "9.14.0"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "",
                          "version_value": "9.16.6"
                        },
                        {
                          "version_affected": "\u003e=",
                          "version_name": "",
                          "version_value": "9.17.0"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "",
                          "version_value": "9.17.4"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "ISC"
            }
          ]
        }
      },
      "credit": [
        {
          "lang": "eng",
          "value": "ISC would like to thank Joseph Gullo for bringing this vulnerability to our attention."
        }
      ],
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "In BIND 9.14.0 -\u003e 9.16.5, 9.17.0 -\u003e 9.17.3, If a server is configured with both QNAME minimization and \u0027forward first\u0027 then an attacker who can send queries to it may be able to trigger the condition that will cause the server to crash. Servers that \u0027forward only\u0027 are not affected."
          }
        ]
      },
      "exploit": [
        {
          "lang": "eng",
          "value": "We are not aware of any active exploits."
        }
      ],
      "generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "impact": {
        "cvss": {
          "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"
        }
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "While query forwarding and QNAME minimization are mutually incompatible, BIND did sometimes allow QNAME minimization when continuing with recursion after \u0027forward first\u0027 did not result in an answer. In these cases the data used by QNAME minimization might be inconsistent, leading to an assertion failure, causing the server to exit.  Affects BIND 9.14.0 -\u003e 9.16.5, 9.17.0 -\u003e 9.17.3"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://kb.isc.org/docs/cve-2020-8621",
            "refsource": "CONFIRM",
            "url": "https://kb.isc.org/docs/cve-2020-8621"
          },
          {
            "name": "https://security.netapp.com/advisory/ntap-20200827-0003/",
            "refsource": "CONFIRM",
            "url": "https://security.netapp.com/advisory/ntap-20200827-0003/"
          },
          {
            "name": "USN-4468-1",
            "refsource": "UBUNTU",
            "url": "https://usn.ubuntu.com/4468-1/"
          },
          {
            "name": "GLSA-202008-19",
            "refsource": "GENTOO",
            "url": "https://security.gentoo.org/glsa/202008-19"
          },
          {
            "name": "https://www.synology.com/security/advisory/Synology_SA_20_19",
            "refsource": "CONFIRM",
            "url": "https://www.synology.com/security/advisory/Synology_SA_20_19"
          },
          {
            "name": "openSUSE-SU-2020:1699",
            "refsource": "SUSE",
            "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html"
          },
          {
            "name": "openSUSE-SU-2020:1701",
            "refsource": "SUSE",
            "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html"
          }
        ]
      },
      "solution": [
        {
          "lang": "eng",
          "value": "Upgrade to the patched release most closely related to your current version of BIND:\n\n    BIND 9.16.6\n    BIND 9.17.4\n"
        }
      ],
      "source": {
        "discovery": "USER"
      },
      "work_around": [
        {
          "lang": "eng",
          "value": "No workarounds known."
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndIncluding": "9.16.5",
                "versionStartIncluding": "9.14.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndIncluding": "9.17.3",
                "versionStartIncluding": "9.17.0",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:synology:dns_server:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "2.2.2-5027",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
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          }
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      },
      "cve": {
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          "ID": "CVE-2020-8621"
        },
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        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
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              "lang": "en",
              "value": "In BIND 9.14.0 -\u003e 9.16.5, 9.17.0 -\u003e 9.17.3, If a server is configured with both QNAME minimization and \u0027forward first\u0027 then an attacker who can send queries to it may be able to trigger the condition that will cause the server to crash. Servers that \u0027forward only\u0027 are not affected."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-617"
                }
              ]
            }
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        },
        "references": {
          "reference_data": [
            {
              "name": "https://kb.isc.org/docs/cve-2020-8621",
              "refsource": "CONFIRM",
              "tags": [
                "Vendor Advisory"
              ],
              "url": "https://kb.isc.org/docs/cve-2020-8621"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20200827-0003/",
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              "tags": [
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              ],
              "url": "https://security.netapp.com/advisory/ntap-20200827-0003/"
            },
            {
              "name": "USN-4468-1",
              "refsource": "UBUNTU",
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              "url": "https://usn.ubuntu.com/4468-1/"
            },
            {
              "name": "GLSA-202008-19",
              "refsource": "GENTOO",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://security.gentoo.org/glsa/202008-19"
            },
            {
              "name": "https://www.synology.com/security/advisory/Synology_SA_20_19",
              "refsource": "CONFIRM",
              "tags": [
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              ],
              "url": "https://www.synology.com/security/advisory/Synology_SA_20_19"
            },
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              "name": "openSUSE-SU-2020:1699",
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              "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html"
            },
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              "refsource": "SUSE",
              "tags": [
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                "Third Party Advisory"
              ],
              "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 4.3,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 8.6,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "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
        }
      },
      "lastModifiedDate": "2022-04-28T18:27Z",
      "publishedDate": "2020-08-21T21:15Z"
    }
  }
}


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  • 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.
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