msrc_cve-2020-12662
Vulnerability from csaf_microsoft
Published
2020-05-02 00:00
Modified
2021-12-16 00:00
Summary
Unbound before 1.10.1 has Insufficient Control of Network Message Volume aka an "NXNSAttack" issue. This is triggered by random subdomains in the NSDNAME in NS records.
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-2020-12662 Unbound before 1.10.1 has Insufficient Control of Network Message Volume aka an \"NXNSAttack\" issue. This is triggered by random subdomains in the NSDNAME in NS records. - VEX",
"url": "https://msrc.microsoft.com/csaf/vex/2020/msrc_cve-2020-12662.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": "Unbound before 1.10.1 has Insufficient Control of Network Message Volume aka an \"NXNSAttack\" issue. This is triggered by random subdomains in the NSDNAME in NS records.",
"tracking": {
"current_release_date": "2021-12-16T00:00:00.000Z",
"generator": {
"date": "2025-10-19T17:53:44.614Z",
"engine": {
"name": "MSRC Generator",
"version": "1.0"
}
},
"id": "msrc_CVE-2020-12662",
"initial_release_date": "2020-05-02T00:00:00.000Z",
"revision_history": [
{
"date": "2020-09-25T00:00:00.000Z",
"legacy_version": "1",
"number": "1",
"summary": "Information published."
},
{
"date": "2021-12-16T00:00:00.000Z",
"legacy_version": "1.1",
"number": "2",
"summary": "Added unbound to CBL-Mariner 2.0"
}
],
"status": "final",
"version": "2"
}
},
"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_name",
"name": "Azure Linux"
},
{
"branches": [
{
"category": "product_version_range",
"name": "\u003ccm1 unbound 1.10.0-3",
"product": {
"name": "\u003ccm1 unbound 1.10.0-3",
"product_id": "1"
}
},
{
"category": "product_version",
"name": "cm1 unbound 1.10.0-3",
"product": {
"name": "cm1 unbound 1.10.0-3",
"product_id": "19164"
}
},
{
"category": "product_version_range",
"name": "\u003ccbl2 unbound 1.10.0-5",
"product": {
"name": "\u003ccbl2 unbound 1.10.0-5",
"product_id": "2"
}
},
{
"category": "product_version",
"name": "cbl2 unbound 1.10.0-5",
"product": {
"name": "cbl2 unbound 1.10.0-5",
"product_id": "19149"
}
}
],
"category": "product_name",
"name": "unbound"
}
],
"category": "vendor",
"name": "Microsoft"
}
],
"relationships": [
{
"category": "default_component_of",
"full_product_name": {
"name": "\u003ccm1 unbound 1.10.0-3 as a component of CBL Mariner 1.0",
"product_id": "16820-1"
},
"product_reference": "1",
"relates_to_product_reference": "16820"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "cm1 unbound 1.10.0-3 as a component of CBL Mariner 1.0",
"product_id": "19164-16820"
},
"product_reference": "19164",
"relates_to_product_reference": "16820"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "\u003ccbl2 unbound 1.10.0-5 as a component of CBL Mariner 2.0",
"product_id": "17086-2"
},
"product_reference": "2",
"relates_to_product_reference": "17086"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "cbl2 unbound 1.10.0-5 as a component of CBL Mariner 2.0",
"product_id": "19149-17086"
},
"product_reference": "19149",
"relates_to_product_reference": "17086"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2020-12662",
"cwe": {
"id": "CWE-400",
"name": "Uncontrolled Resource Consumption"
},
"notes": [
{
"category": "general",
"text": "mitre",
"title": "Assigning CNA"
}
],
"product_status": {
"fixed": [
"19164-16820",
"19149-17086"
],
"known_affected": [
"16820-1",
"17086-2"
]
},
"references": [
{
"category": "self",
"summary": "CVE-2020-12662 Unbound before 1.10.1 has Insufficient Control of Network Message Volume aka an \"NXNSAttack\" issue. This is triggered by random subdomains in the NSDNAME in NS records. - VEX",
"url": "https://msrc.microsoft.com/csaf/vex/2020/msrc_cve-2020-12662.json"
}
],
"remediations": [
{
"category": "vendor_fix",
"date": "2020-09-25T00:00:00.000Z",
"details": "1.10.0-3:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
"product_ids": [
"16820-1"
],
"url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
},
{
"category": "vendor_fix",
"date": "2020-09-25T00:00:00.000Z",
"details": "1.10.0-5:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
"product_ids": [
"17086-2"
],
"url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"environmentalsScore": 0.0,
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"temporalScore": 7.5,
"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"
},
"products": [
"16820-1",
"17086-2"
]
}
],
"title": "Unbound before 1.10.1 has Insufficient Control of Network Message Volume aka an \"NXNSAttack\" issue. This is triggered by random subdomains in the NSDNAME in NS records."
}
]
}
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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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