CVE-2020-17467

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "datePublic": "2020-12-08T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "An issue was discovered in FNET through 4.6.4. The code for processing the hostname from an LLMNR request doesn't check for '\\0' termination. Therefore, the deduced length of the hostname doesn't reflect the correct length of the actual data. This may lead to Information Disclosure in _fnet_llmnr_poll in fnet_llmnr.c during a response to a malicious request of the DNS class IN."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2020-12-11T22:36:31.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://www.kb.cert.org/vuls/id/815128"}, {"tags": ["x_refsource_MISC"], "url": "https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01"}, {"tags": ["x_refsource_CONFIRM"], "url": "http://fnet.sourceforge.net/manual/fnet_history.html"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2020-17467", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "An issue was discovered in FNET through 4.6.4. The code for processing the hostname from an LLMNR request doesn't check for '\\0' termination. Therefore, the deduced length of the hostname doesn't reflect the correct length of the actual data. This may lead to Information Disclosure in _fnet_llmnr_poll in fnet_llmnr.c during a response to a malicious request of the DNS class IN."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://www.kb.cert.org/vuls/id/815128", "refsource": "MISC", "url": "https://www.kb.cert.org/vuls/id/815128"}, {"name": "https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01", "refsource": "MISC", "url": "https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01"}, {"name": "http://fnet.sourceforge.net/manual/fnet_history.html", "refsource": "CONFIRM", "url": "http://fnet.sourceforge.net/manual/fnet_history.html"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T13:53:17.399Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.kb.cert.org/vuls/id/815128"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "http://fnet.sourceforge.net/manual/fnet_history.html"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2020-17467", "datePublished": "2020-12-11T22:36:31.000Z", "dateReserved": "2020-08-10T00:00:00.000Z", "dateUpdated": "2024-08-04T13:53:17.399Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:butok:fnet:*:*:*:*:*:*:*:*", "matchCriteriaId": "F8E2831C-6C9A-4130-8993-2E5DF9F8F6F3", "versionEndIncluding": "4.6.4", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in FNET through 4.6.4. The code for processing the hostname from an LLMNR request doesn't check for '\\0' termination. Therefore, the deduced length of the hostname doesn't reflect the correct length of the actual data. This may lead to Information Disclosure in _fnet_llmnr_poll in fnet_llmnr.c during a response to a malicious request of the DNS class IN."}, {"lang": "es", "value": "Se detect\u00f3 un problema en FNET versiones hasta 4.6.4. El c\u00f3digo para procesar el nombre de host de una petici\u00f3n LLMNR no comprueba la terminaci\u00f3n '\\ 0'. Por lo tanto, la longitud deducida del nombre de host no refleja la longitud correcta de los datos reales. Esto puede conllevar a una divulgaci\u00f3n de informaci\u00f3n en la funci\u00f3n _fnet_llmnr_poll en el archivo fnet_llmnr.c durante una respuesta a una petici\u00f3n maliciosa de la clase de DNS IN"}], "id": "CVE-2020-17467", "lastModified": "2026-06-17T02:58:58.723", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.4, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-12-11T23:15:13.557", "references": [{"source": "cve@mitre.org", "tags": ["Release Notes", "Third Party Advisory"], "url": "http://fnet.sourceforge.net/manual/fnet_history.html"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://www.kb.cert.org/vuls/id/815128"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "http://fnet.sourceforge.net/manual/fnet_history.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://www.kb.cert.org/vuls/id/815128"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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