cve-2020-12667
Vulnerability from cvelistv5
Published
2020-05-19 00:00
Modified
2024-08-04 12:04
Summary
Knot Resolver before 5.1.1 allows traffic amplification via a crafted DNS answer from an attacker-controlled server, aka an "NXNSAttack" issue. This is triggered by random subdomains in the NSDNAME in NS records.
References
cve@mitre.orghttp://cyber-security-group.cs.tau.ac.il/#Technical Description, Third Party Advisory
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2020/05/19/2Mailing List, Third Party Advisory
cve@mitre.orghttps://en.blog.nic.cz/2020/05/19/nxnsattack-upgrade-resolvers-to-stop-new-kind-of-random-subdomain-attack/Technical Description, Vendor Advisory
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2024/04/msg00017.html
cve@mitre.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/76Y4FITMOH6RVPWAANGV7NB2ZHPJJGDQ/
cve@mitre.orghttps://www.knot-resolver.cz/2020-05-19-knot-resolver-5.1.1.htmlRelease Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://cyber-security-group.cs.tau.ac.il/#Technical Description, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2020/05/19/2Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://en.blog.nic.cz/2020/05/19/nxnsattack-upgrade-resolvers-to-stop-new-kind-of-random-subdomain-attack/Technical Description, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/76Y4FITMOH6RVPWAANGV7NB2ZHPJJGDQ/
af854a3a-2127-422b-91ae-364da2661108https://www.knot-resolver.cz/2020-05-19-knot-resolver-5.1.1.htmlRelease Notes, Vendor Advisory
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website


{
   containers: {
      adp: [
         {
            affected: [
               {
                  cpes: [
                     "cpe:2.3:a:nic:knot_resolver:-:*:*:*:*:*:*:*",
                  ],
                  defaultStatus: "unknown",
                  product: "knot_resolver",
                  vendor: "nic",
                  versions: [
                     {
                        status: "affected",
                        version: "-",
                     },
                  ],
               },
            ],
            metrics: [
               {
                  cvssV3_1: {
                     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",
                  },
               },
               {
                  other: {
                     content: {
                        id: "CVE-2020-12667",
                        options: [
                           {
                              Exploitation: "none",
                           },
                           {
                              Automatable: "yes",
                           },
                           {
                              "Technical Impact": "partial",
                           },
                        ],
                        role: "CISA Coordinator",
                        timestamp: "2024-04-26T17:02:23.525566Z",
                        version: "2.0.3",
                     },
                     type: "ssvc",
                  },
               },
            ],
            problemTypes: [
               {
                  descriptions: [
                     {
                        cweId: "CWE-400",
                        description: "CWE-400 Uncontrolled Resource Consumption",
                        lang: "en",
                        type: "CWE",
                     },
                  ],
               },
            ],
            providerMetadata: {
               dateUpdated: "2024-06-04T17:12:29.314Z",
               orgId: "134c704f-9b21-4f2e-91b3-4a467353bcc0",
               shortName: "CISA-ADP",
            },
            title: "CISA ADP Vulnrichment",
         },
         {
            providerMetadata: {
               dateUpdated: "2024-08-04T12:04:22.538Z",
               orgId: "af854a3a-2127-422b-91ae-364da2661108",
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            },
            references: [
               {
                  tags: [
                     "x_transferred",
                  ],
                  url: "https://en.blog.nic.cz/2020/05/19/nxnsattack-upgrade-resolvers-to-stop-new-kind-of-random-subdomain-attack/",
               },
               {
                  tags: [
                     "x_transferred",
                  ],
                  url: "https://www.knot-resolver.cz/2020-05-19-knot-resolver-5.1.1.html",
               },
               {
                  name: "[oss-security] 20200519 [CVE-2020-12667] Knot Resolver 5.1.1 NXNSAttack mitigation",
                  tags: [
                     "mailing-list",
                     "x_transferred",
                  ],
                  url: "http://www.openwall.com/lists/oss-security/2020/05/19/2",
               },
               {
                  tags: [
                     "x_transferred",
                  ],
                  url: "http://cyber-security-group.cs.tau.ac.il/#",
               },
               {
                  name: "FEDORA-2020-bf68101ad3",
                  tags: [
                     "vendor-advisory",
                     "x_transferred",
                  ],
                  url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/76Y4FITMOH6RVPWAANGV7NB2ZHPJJGDQ/",
               },
               {
                  name: "[debian-lts-announce] 20240426 [SECURITY] [DLA 3795-1] knot-resolver security update",
                  tags: [
                     "mailing-list",
                     "x_transferred",
                  ],
                  url: "https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html",
               },
            ],
            title: "CVE Program Container",
         },
      ],
      cna: {
         affected: [
            {
               product: "n/a",
               vendor: "n/a",
               versions: [
                  {
                     status: "affected",
                     version: "n/a",
                  },
               ],
            },
         ],
         datePublic: "2020-05-19T00:00:00",
         descriptions: [
            {
               lang: "en",
               value: "Knot Resolver before 5.1.1 allows traffic amplification via a crafted DNS answer from an attacker-controlled server, aka an \"NXNSAttack\" issue. This is triggered by random subdomains in the NSDNAME in NS records.",
            },
         ],
         problemTypes: [
            {
               descriptions: [
                  {
                     description: "n/a",
                     lang: "en",
                     type: "text",
                  },
               ],
            },
         ],
         providerMetadata: {
            dateUpdated: "2024-04-26T07:06:02.945535",
            orgId: "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
            shortName: "mitre",
         },
         references: [
            {
               url: "https://en.blog.nic.cz/2020/05/19/nxnsattack-upgrade-resolvers-to-stop-new-kind-of-random-subdomain-attack/",
            },
            {
               url: "https://www.knot-resolver.cz/2020-05-19-knot-resolver-5.1.1.html",
            },
            {
               name: "[oss-security] 20200519 [CVE-2020-12667] Knot Resolver 5.1.1 NXNSAttack mitigation",
               tags: [
                  "mailing-list",
               ],
               url: "http://www.openwall.com/lists/oss-security/2020/05/19/2",
            },
            {
               url: "http://cyber-security-group.cs.tau.ac.il/#",
            },
            {
               name: "FEDORA-2020-bf68101ad3",
               tags: [
                  "vendor-advisory",
               ],
               url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/76Y4FITMOH6RVPWAANGV7NB2ZHPJJGDQ/",
            },
            {
               name: "[debian-lts-announce] 20240426 [SECURITY] [DLA 3795-1] knot-resolver security update",
               tags: [
                  "mailing-list",
               ],
               url: "https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html",
            },
         ],
      },
   },
   cveMetadata: {
      assignerOrgId: "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
      assignerShortName: "mitre",
      cveId: "CVE-2020-12667",
      datePublished: "2020-05-19T00:00:00",
      dateReserved: "2020-05-05T00:00:00",
      dateUpdated: "2024-08-04T12:04:22.538Z",
      state: "PUBLISHED",
   },
   dataType: "CVE_RECORD",
   dataVersion: "5.1",
   "vulnerability-lookup:meta": {
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Esto es activado por subdominios aleatorios en los registros NS en NSDNAME.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:N/I:N/A:P\",\"baseScore\":5.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-400\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-400\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:nic:knot_resolver:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"5.1.1\",\"matchCriteriaId\":\"CFA28A54-33C9-49D7-9B04-28088B14DCE2\"}]}]}],\"references\":[{\"url\":\"http://cyber-security-group.cs.tau.ac.il/#\",\"source\":\"cve@mitre.org\",\"tags\":[\"Technical Description\",\"Third Party Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2020/05/19/2\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://en.blog.nic.cz/2020/05/19/nxnsattack-upgrade-resolvers-to-stop-new-kind-of-random-subdomain-attack/\",\"source\":\"cve@mitre.org\",\"tags\":[\"Technical Description\",\"Vendor Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/76Y4FITMOH6RVPWAANGV7NB2ZHPJJGDQ/\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://www.knot-resolver.cz/2020-05-19-knot-resolver-5.1.1.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Release Notes\",\"Vendor Advisory\"]},{\"url\":\"http://cyber-security-group.cs.tau.ac.il/#\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Technical Description\",\"Third Party Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2020/05/19/2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://en.blog.nic.cz/2020/05/19/nxnsattack-upgrade-resolvers-to-stop-new-kind-of-random-subdomain-attack/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Technical Description\",\"Vendor Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/76Y4FITMOH6RVPWAANGV7NB2ZHPJJGDQ/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://www.knot-resolver.cz/2020-05-19-knot-resolver-5.1.1.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Release Notes\",\"Vendor Advisory\"]}]}}",
      vulnrichment: {
         containers: "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://en.blog.nic.cz/2020/05/19/nxnsattack-upgrade-resolvers-to-stop-new-kind-of-random-subdomain-attack/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://www.knot-resolver.cz/2020-05-19-knot-resolver-5.1.1.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2020/05/19/2\", \"name\": \"[oss-security] 20200519 [CVE-2020-12667] Knot Resolver 5.1.1 NXNSAttack mitigation\", \"tags\": [\"mailing-list\", \"x_transferred\"]}, {\"url\": \"http://cyber-security-group.cs.tau.ac.il/#\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/76Y4FITMOH6RVPWAANGV7NB2ZHPJJGDQ/\", \"name\": \"FEDORA-2020-bf68101ad3\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html\", \"name\": \"[debian-lts-announce] 20240426 [SECURITY] [DLA 3795-1] knot-resolver security update\", \"tags\": [\"mailing-list\", \"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T12:04:22.538Z\"}}, {\"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2020-12667\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-04-26T17:02:23.525566Z\"}}}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:nic:knot_resolver:-:*:*:*:*:*:*:*\"], \"vendor\": \"nic\", \"product\": \"knot_resolver\", \"versions\": [{\"status\": \"affected\", \"version\": \"-\"}], \"defaultStatus\": \"unknown\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-400\", \"description\": \"CWE-400 Uncontrolled Resource Consumption\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-04-26T17:12:53.294Z\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"affected\": [{\"vendor\": \"n/a\", \"product\": \"n/a\", \"versions\": [{\"status\": \"affected\", \"version\": \"n/a\"}]}], \"datePublic\": \"2020-05-19T00:00:00\", \"references\": [{\"url\": \"https://en.blog.nic.cz/2020/05/19/nxnsattack-upgrade-resolvers-to-stop-new-kind-of-random-subdomain-attack/\"}, {\"url\": \"https://www.knot-resolver.cz/2020-05-19-knot-resolver-5.1.1.html\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2020/05/19/2\", \"name\": \"[oss-security] 20200519 [CVE-2020-12667] Knot Resolver 5.1.1 NXNSAttack mitigation\", \"tags\": [\"mailing-list\"]}, {\"url\": \"http://cyber-security-group.cs.tau.ac.il/#\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/76Y4FITMOH6RVPWAANGV7NB2ZHPJJGDQ/\", \"name\": \"FEDORA-2020-bf68101ad3\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html\", \"name\": \"[debian-lts-announce] 20240426 [SECURITY] [DLA 3795-1] knot-resolver security update\", \"tags\": [\"mailing-list\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Knot Resolver before 5.1.1 allows traffic amplification via a crafted DNS answer from an attacker-controlled server, aka an \\\"NXNSAttack\\\" issue. This is triggered by random subdomains in the NSDNAME in NS records.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"text\", \"description\": \"n/a\"}]}], \"providerMetadata\": {\"orgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"shortName\": \"mitre\", \"dateUpdated\": \"2024-04-26T07:06:02.945535\"}}}",
         cveMetadata: "{\"cveId\": \"CVE-2020-12667\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-08-04T12:04:22.538Z\", \"dateReserved\": \"2020-05-05T00:00:00\", \"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"datePublished\": \"2020-05-19T00:00:00\", \"assignerShortName\": \"mitre\"}",
         dataType: "CVE_RECORD",
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}


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