fkie_cve-2020-17469
Vulnerability from fkie_nvd
Published
2020-12-11 23:15
Modified
2024-11-21 05:08
Severity ?
Summary
An issue was discovered in FNET through 4.6.4. The code for IPv6 fragment reassembly tries to access a previous fragment starting from a network incoming fragment that still doesn't have a reference to the previous one (which supposedly resides in the reassembly list). When faced with an incoming fragment that belongs to a non-empty fragment list, IPv6 reassembly must check that there are no empty holes between the fragments: this leads to an uninitialized pointer dereference in _fnet_ip6_reassembly in fnet_ip6.c, and causes Denial-of-Service.
References
▼ | URL | Tags | |
---|---|---|---|
cve@mitre.org | http://fnet.sourceforge.net/manual/fnet_history.html | Release Notes, Third Party Advisory | |
cve@mitre.org | https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 | Third Party Advisory, US Government Resource | |
cve@mitre.org | https://www.kb.cert.org/vuls/id/815128 | Third Party Advisory, US Government Resource | |
af854a3a-2127-422b-91ae-364da2661108 | http://fnet.sourceforge.net/manual/fnet_history.html | Release Notes, Third Party Advisory | |
af854a3a-2127-422b-91ae-364da2661108 | https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 | Third Party Advisory, US Government Resource | |
af854a3a-2127-422b-91ae-364da2661108 | https://www.kb.cert.org/vuls/id/815128 | Third Party Advisory, US Government Resource |
{ "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 IPv6 fragment reassembly tries to access a previous fragment starting from a network incoming fragment that still doesn\u0027t have a reference to the previous one (which supposedly resides in the reassembly list). When faced with an incoming fragment that belongs to a non-empty fragment list, IPv6 reassembly must check that there are no empty holes between the fragments: this leads to an uninitialized pointer dereference in _fnet_ip6_reassembly in fnet_ip6.c, and causes Denial-of-Service." }, { "lang": "es", "value": "Se detect\u00f3 un problema en FNET versiones hasta 4.6.4.\u0026#xa0;El c\u00f3digo para el reensamblaje de fragmentos IPv6 intenta acceder a un fragmento anterior a partir de un fragmento entrante de red que a\u00fan no cuenta con una referencia al anterior (que supuestamente reside en la lista de reensamblado).\u0026#xa0;Cuando se enfrenta a un fragmento entrante que pertenece a una lista de fragmentos no vac\u00edos, el reensamblaje de IPv6 debe comprobar que no haya huecos vac\u00edos entre los fragmentos: esto conlleva a una desreferencia del puntero no inicializado en la funci\u00f3n _fnet_ip6_reassembly en el archivo fnet_ip6.c, y causa una Denegaci\u00f3n de Servicio" } ], "id": "CVE-2020-17469", "lastModified": "2024-11-21T05:08:10.583", "metrics": { "cvssMetricV2": [ { "acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": { "accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0" }, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false } ], "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" } ] }, "published": "2020-12-11T23:15:13.683", "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-824" } ], "source": "nvd@nist.gov", "type": "Primary" } ] }
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Sightings
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Nomenclature
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