CVE-2022-48256 - Vulnerability Details - OpenCVE

Description

Technitium DNS Server before 10.0 allows a self-CNAME denial-of-service attack in which a CNAME loop causes an answer to contain hundreds of records.

Published: 2023-01-13

Score: 7.5 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:technitium:dns_server:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2022-50965	Technitium DNS Server before 10.0 allows a self-CNAME denial-of-service attack in which a CNAME loop causes an answer to contain hundreds of records.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00411.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#version-100

History

No history.

Subscriptions

Technitium Dns Server

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2023-01-13T00:00:00.000Z

Updated: 2025-04-07T15:40:46.877Z

Reserved: 2023-01-13T00:00:00.000Z

Link: CVE-2022-48256

Vulnrichment

No data.

NVD

Status : Modified

Published: 2023-01-13T01:15:10.143

Modified: 2025-04-07T16:15:18.900

Link: CVE-2022-48256

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-835

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2022-48256", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2025-04-07T15:40:46.877Z", "dateReserved": "2023-01-13T00:00:00.000Z", "datePublished": "2023-01-13T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2023-01-13T00:00:00.000Z"}, "descriptions": [{"lang": "en", "value": "Technitium DNS Server before 10.0 allows a self-CNAME denial-of-service attack in which a CNAME loop causes an answer to contain hundreds of records."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#version-100"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T15:10:59.544Z"}, "title": "CVE Program Container", "references": [{"url": "https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#version-100", "tags": ["x_transferred"]}]}, {"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-835", "lang": "en", "description": "CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')"}]}], "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": {"timestamp": "2025-04-07T15:39:49.211323Z", "id": "CVE-2022-48256", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-04-07T15:40:46.877Z"}}]}}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:technitium:dns_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "82696A51-5A54-4E04-BD3D-8B4F1267E8DD", "versionEndExcluding": "10.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Technitium DNS Server before 10.0 allows a self-CNAME denial-of-service attack in which a CNAME loop causes an answer to contain hundreds of records."}, {"lang": "es", "value": "Technitium DNS Server anterior a 10.0 permite un ataque de denegaci\u00f3n de servicio CNAME propio en el que un bucle CNAME provoca que una respuesta contenga cientos de registros."}], "id": "CVE-2022-48256", "lastModified": "2025-04-07T16:15:18.900", "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": "nvd@nist.gov", "type": "Primary"}, {"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2023-01-13T01:15:10.143", "references": [{"source": "cve@mitre.org", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#version-100"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#version-100"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-835"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-835"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}