msrc_cve-2021-3672
Vulnerability from csaf_microsoft
Published
2021-11-02 00:00
Modified
2025-05-27 00:00
Summary
A flaw was found in c-ares library where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability.
Notes
Additional Resources
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
Disclaimer
The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
{
"document": {
"category": "csaf_vex",
"csaf_version": "2.0",
"distribution": {
"text": "Public",
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "en-US",
"notes": [
{
"category": "general",
"text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
"title": "Additional Resources"
},
{
"category": "legal_disclaimer",
"text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
"title": "Disclaimer"
}
],
"publisher": {
"category": "vendor",
"contact_details": "secure@microsoft.com",
"name": "Microsoft Security Response Center",
"namespace": "https://msrc.microsoft.com"
},
"references": [
{
"category": "self",
"summary": "CVE-2021-3672 A flaw was found in c-ares library where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability. - VEX",
"url": "https://msrc.microsoft.com/csaf/vex/2021/msrc_cve-2021-3672.json"
},
{
"category": "external",
"summary": "Microsoft Support Lifecycle",
"url": "https://support.microsoft.com/lifecycle"
},
{
"category": "external",
"summary": "Common Vulnerability Scoring System",
"url": "https://www.first.org/cvss"
}
],
"title": "A flaw was found in c-ares library where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability.",
"tracking": {
"current_release_date": "2025-05-27T00:00:00.000Z",
"generator": {
"date": "2025-10-19T22:19:06.413Z",
"engine": {
"name": "MSRC Generator",
"version": "1.0"
}
},
"id": "msrc_CVE-2021-3672",
"initial_release_date": "2021-11-02T00:00:00.000Z",
"revision_history": [
{
"date": "2021-11-27T00:00:00.000Z",
"legacy_version": "1",
"number": "1",
"summary": "Information published."
},
{
"date": "2025-02-27T00:00:00.000Z",
"legacy_version": "1.1",
"number": "2",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-02-28T00:00:00.000Z",
"legacy_version": "1.2",
"number": "3",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-01T00:00:00.000Z",
"legacy_version": "1.3",
"number": "4",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-02T00:00:00.000Z",
"legacy_version": "1.4",
"number": "5",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-03T00:00:00.000Z",
"legacy_version": "1.5",
"number": "6",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-04T00:00:00.000Z",
"legacy_version": "1.6",
"number": "7",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-05T00:00:00.000Z",
"legacy_version": "1.7",
"number": "8",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-06T00:00:00.000Z",
"legacy_version": "1.8",
"number": "9",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-08T00:00:00.000Z",
"legacy_version": "1.9",
"number": "10",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-09T00:00:00.000Z",
"legacy_version": "2",
"number": "11",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-10T00:00:00.000Z",
"legacy_version": "2.1",
"number": "12",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-11T00:00:00.000Z",
"legacy_version": "2.2",
"number": "13",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-12T00:00:00.000Z",
"legacy_version": "2.3",
"number": "14",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-13T00:00:00.000Z",
"legacy_version": "2.4",
"number": "15",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-14T00:00:00.000Z",
"legacy_version": "2.5",
"number": "16",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-15T00:00:00.000Z",
"legacy_version": "2.6",
"number": "17",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-16T00:00:00.000Z",
"legacy_version": "2.7",
"number": "18",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-17T00:00:00.000Z",
"legacy_version": "2.8",
"number": "19",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-18T00:00:00.000Z",
"legacy_version": "2.9",
"number": "20",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-19T00:00:00.000Z",
"legacy_version": "3",
"number": "21",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-20T00:00:00.000Z",
"legacy_version": "3.1",
"number": "22",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-21T00:00:00.000Z",
"legacy_version": "3.2",
"number": "23",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-22T00:00:00.000Z",
"legacy_version": "3.3",
"number": "24",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-23T00:00:00.000Z",
"legacy_version": "3.4",
"number": "25",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-24T00:00:00.000Z",
"legacy_version": "3.5",
"number": "26",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-25T00:00:00.000Z",
"legacy_version": "3.6",
"number": "27",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-26T00:00:00.000Z",
"legacy_version": "3.7",
"number": "28",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-27T00:00:00.000Z",
"legacy_version": "3.8",
"number": "29",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-28T00:00:00.000Z",
"legacy_version": "3.9",
"number": "30",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-29T00:00:00.000Z",
"legacy_version": "4",
"number": "31",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-30T00:00:00.000Z",
"legacy_version": "4.1",
"number": "32",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-03-31T00:00:00.000Z",
"legacy_version": "4.2",
"number": "33",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-01T00:00:00.000Z",
"legacy_version": "4.3",
"number": "34",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-03T00:00:00.000Z",
"legacy_version": "4.4",
"number": "35",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-04T00:00:00.000Z",
"legacy_version": "4.5",
"number": "36",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-05T00:00:00.000Z",
"legacy_version": "4.6",
"number": "37",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-06T00:00:00.000Z",
"legacy_version": "4.7",
"number": "38",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-07T00:00:00.000Z",
"legacy_version": "4.8",
"number": "39",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-08T00:00:00.000Z",
"legacy_version": "4.9",
"number": "40",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-09T00:00:00.000Z",
"legacy_version": "5",
"number": "41",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-11T00:00:00.000Z",
"legacy_version": "5.1",
"number": "42",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-12T00:00:00.000Z",
"legacy_version": "5.2",
"number": "43",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-13T00:00:00.000Z",
"legacy_version": "5.3",
"number": "44",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-14T00:00:00.000Z",
"legacy_version": "5.4",
"number": "45",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-15T00:00:00.000Z",
"legacy_version": "5.5",
"number": "46",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-16T00:00:00.000Z",
"legacy_version": "5.6",
"number": "47",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-17T00:00:00.000Z",
"legacy_version": "5.7",
"number": "48",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-18T00:00:00.000Z",
"legacy_version": "5.8",
"number": "49",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-19T00:00:00.000Z",
"legacy_version": "5.9",
"number": "50",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-20T00:00:00.000Z",
"legacy_version": "6",
"number": "51",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-21T00:00:00.000Z",
"legacy_version": "6.1",
"number": "52",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-25T00:00:00.000Z",
"legacy_version": "6.2",
"number": "53",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-26T00:00:00.000Z",
"legacy_version": "6.3",
"number": "54",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-28T00:00:00.000Z",
"legacy_version": "6.4",
"number": "55",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-29T00:00:00.000Z",
"legacy_version": "6.5",
"number": "56",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-04-30T00:00:00.000Z",
"legacy_version": "6.6",
"number": "57",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-01T00:00:00.000Z",
"legacy_version": "6.7",
"number": "58",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-02T00:00:00.000Z",
"legacy_version": "6.8",
"number": "59",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-03T00:00:00.000Z",
"legacy_version": "6.9",
"number": "60",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-04T00:00:00.000Z",
"legacy_version": "7",
"number": "61",
"summary": "Added c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-05T00:00:00.000Z",
"legacy_version": "7.1",
"number": "62",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-06T00:00:00.000Z",
"legacy_version": "7.2",
"number": "63",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-07T00:00:00.000Z",
"legacy_version": "7.3",
"number": "64",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-08T00:00:00.000Z",
"legacy_version": "7.4",
"number": "65",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-09T00:00:00.000Z",
"legacy_version": "7.5",
"number": "66",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-10T00:00:00.000Z",
"legacy_version": "7.6",
"number": "67",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-11T00:00:00.000Z",
"legacy_version": "7.7",
"number": "68",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-12T00:00:00.000Z",
"legacy_version": "7.8",
"number": "69",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-13T00:00:00.000Z",
"legacy_version": "7.9",
"number": "70",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-14T00:00:00.000Z",
"legacy_version": "8",
"number": "71",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-15T00:00:00.000Z",
"legacy_version": "8.1",
"number": "72",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-16T00:00:00.000Z",
"legacy_version": "8.2",
"number": "73",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-17T00:00:00.000Z",
"legacy_version": "8.3",
"number": "74",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-18T00:00:00.000Z",
"legacy_version": "8.4",
"number": "75",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-19T00:00:00.000Z",
"legacy_version": "8.5",
"number": "76",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-20T00:00:00.000Z",
"legacy_version": "8.6",
"number": "77",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-21T00:00:00.000Z",
"legacy_version": "8.7",
"number": "78",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-22T00:00:00.000Z",
"legacy_version": "8.8",
"number": "79",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-23T00:00:00.000Z",
"legacy_version": "8.9",
"number": "80",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-24T00:00:00.000Z",
"legacy_version": "9",
"number": "81",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-25T00:00:00.000Z",
"legacy_version": "9.1",
"number": "82",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-26T00:00:00.000Z",
"legacy_version": "9.2",
"number": "83",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
},
{
"date": "2025-05-27T00:00:00.000Z",
"legacy_version": "9.3",
"number": "84",
"summary": "Added pgbouncer to CBL-Mariner 2.0\nAdded c-ares to CBL-Mariner 1.0"
}
],
"status": "final",
"version": "84"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"branches": [
{
"category": "product_version",
"name": "1.0",
"product": {
"name": "CBL Mariner 1.0",
"product_id": "16820"
}
},
{
"category": "product_version",
"name": "2.0",
"product": {
"name": "CBL Mariner 2.0",
"product_id": "17086"
}
},
{
"category": "product_version",
"name": "3.0",
"product": {
"name": "Azure Linux 3.0",
"product_id": "17084"
}
}
],
"category": "product_name",
"name": "Azure Linux"
},
{
"branches": [
{
"category": "product_version_range",
"name": "\u003ccm1 pgbouncer 1.16.1-1",
"product": {
"name": "\u003ccm1 pgbouncer 1.16.1-1",
"product_id": "6"
}
},
{
"category": "product_version",
"name": "cm1 pgbouncer 1.16.1-1",
"product": {
"name": "cm1 pgbouncer 1.16.1-1",
"product_id": "18853"
}
},
{
"category": "product_version_range",
"name": "\u003ccbl2 pgbouncer 1.16.1-1",
"product": {
"name": "\u003ccbl2 pgbouncer 1.16.1-1",
"product_id": "4"
}
},
{
"category": "product_version",
"name": "cbl2 pgbouncer 1.16.1-1",
"product": {
"name": "cbl2 pgbouncer 1.16.1-1",
"product_id": "18855"
}
}
],
"category": "product_name",
"name": "pgbouncer"
},
{
"branches": [
{
"category": "product_version_range",
"name": "\u003ccm1 c-ares 1.18.1-1",
"product": {
"name": "\u003ccm1 c-ares 1.18.1-1",
"product_id": "5"
}
},
{
"category": "product_version",
"name": "cm1 c-ares 1.18.1-1",
"product": {
"name": "cm1 c-ares 1.18.1-1",
"product_id": "18854"
}
}
],
"category": "product_name",
"name": "c-ares"
},
{
"branches": [
{
"category": "product_version_range",
"name": "\u003cazl3 ceph 18.2.2-1",
"product": {
"name": "\u003cazl3 ceph 18.2.2-1",
"product_id": "8"
}
},
{
"category": "product_version",
"name": "azl3 ceph 18.2.2-1",
"product": {
"name": "azl3 ceph 18.2.2-1",
"product_id": "16855"
}
},
{
"category": "product_version_range",
"name": "\u003cazl3 ceph 18.2.2-8",
"product": {
"name": "\u003cazl3 ceph 18.2.2-8",
"product_id": "3"
}
},
{
"category": "product_version",
"name": "azl3 ceph 18.2.2-8",
"product": {
"name": "azl3 ceph 18.2.2-8",
"product_id": "19666"
}
}
],
"category": "product_name",
"name": "ceph"
},
{
"category": "product_name",
"name": "azl3 rubygem-mini_portile2 2.8.4-1",
"product": {
"name": "azl3 rubygem-mini_portile2 2.8.4-1",
"product_id": "2"
}
},
{
"category": "product_name",
"name": "azl3 tensorflow 2.16.1-9",
"product": {
"name": "azl3 tensorflow 2.16.1-9",
"product_id": "7"
}
},
{
"category": "product_name",
"name": "cbl2 ceph 16.2.10-7",
"product": {
"name": "cbl2 ceph 16.2.10-7",
"product_id": "1"
}
}
],
"category": "vendor",
"name": "Microsoft"
}
],
"relationships": [
{
"category": "default_component_of",
"full_product_name": {
"name": "\u003ccm1 pgbouncer 1.16.1-1 as a component of CBL Mariner 1.0",
"product_id": "16820-6"
},
"product_reference": "6",
"relates_to_product_reference": "16820"
},
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},
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},
{
"category": "default_component_of",
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},
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},
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},
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},
{
"category": "default_component_of",
"full_product_name": {
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},
"product_reference": "4",
"relates_to_product_reference": "17086"
},
{
"category": "default_component_of",
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"name": "cbl2 pgbouncer 1.16.1-1 as a component of CBL Mariner 2.0",
"product_id": "18855-17086"
},
"product_reference": "18855",
"relates_to_product_reference": "17086"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "\u003cazl3 ceph 18.2.2-1 as a component of Azure Linux 3.0",
"product_id": "17084-8"
},
"product_reference": "8",
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},
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"category": "default_component_of",
"full_product_name": {
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},
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},
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},
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]
},
"vulnerabilities": [
{
"cve": "CVE-2021-3672",
"cwe": {
"id": "CWE-79",
"name": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
},
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{
"label": "component_not_present",
"product_ids": [
"17084-2",
"17084-7"
]
},
{
"label": "vulnerable_code_not_present",
"product_ids": [
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]
}
],
"notes": [
{
"category": "general",
"text": "redhat",
"title": "Assigning CNA"
}
],
"product_status": {
"fixed": [
"18853-16820",
"18854-16820",
"18855-17086",
"16855-17084",
"19666-17084"
],
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"16820-6",
"16820-5",
"17086-4",
"17084-8",
"17084-3"
],
"known_not_affected": [
"17084-2",
"17084-7",
"17086-1"
]
},
"references": [
{
"category": "self",
"summary": "CVE-2021-3672 A flaw was found in c-ares library where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability. - VEX",
"url": "https://msrc.microsoft.com/csaf/vex/2021/msrc_cve-2021-3672.json"
}
],
"remediations": [
{
"category": "vendor_fix",
"date": "2021-11-27T00:00:00.000Z",
"details": "1.16.1-1:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
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"16820-6",
"17086-4"
],
"url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
},
{
"category": "vendor_fix",
"date": "2021-11-27T00:00:00.000Z",
"details": "1.18.1-1:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
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],
"url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
},
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"category": "vendor_fix",
"date": "2021-11-27T00:00:00.000Z",
"details": "18.2.2-1:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
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"17084-8",
"17084-3"
],
"url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.6,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"environmentalsScore": 0.0,
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"temporalScore": 5.6,
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
"version": "3.1"
},
"products": [
"16820-6",
"16820-5",
"17086-4",
"17084-8",
"17084-3"
]
}
],
"title": "A flaw was found in c-ares library where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability."
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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