CVE-2019-18792

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "datePublic": "2019-11-21T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "An issue was discovered in Suricata 5.0.0. It is possible to bypass/evade any tcp based signature by overlapping a TCP segment with a fake FIN packet. The fake FIN packet is injected just before the PUSH ACK packet we want to bypass. The PUSH ACK packet (containing the data) will be ignored by Suricata because it overlaps the FIN packet (the sequence and ack number are identical in the two packets). The client will ignore the fake FIN packet because the ACK flag is not set. Both linux and windows clients are ignoring the injected packet."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2020-01-30T17:06:09.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://redmine.openinfosecfoundation.org/issues/3324"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/OISF/suricata/commit/fa692df37a796c3330c81988d15ef1a219afc006"}, {"tags": ["x_refsource_MISC"], "url": "https://redmine.openinfosecfoundation.org/issues/3394"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/OISF/suricata/commit/1c63d3905852f746ccde7e2585600b2199cefb4b"}, {"name": "[debian-lts-announce] 20200130 [SECURITY] [DLA 2087-1] suricata security update", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "https://lists.debian.org/debian-lts-announce/2020/01/msg00032.html"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2019-18792", "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 Suricata 5.0.0. It is possible to bypass/evade any tcp based signature by overlapping a TCP segment with a fake FIN packet. The fake FIN packet is injected just before the PUSH ACK packet we want to bypass. The PUSH ACK packet (containing the data) will be ignored by Suricata because it overlaps the FIN packet (the sequence and ack number are identical in the two packets). The client will ignore the fake FIN packet because the ACK flag is not set. Both linux and windows clients are ignoring the injected packet."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://redmine.openinfosecfoundation.org/issues/3324", "refsource": "MISC", "url": "https://redmine.openinfosecfoundation.org/issues/3324"}, {"name": "https://github.com/OISF/suricata/commit/fa692df37a796c3330c81988d15ef1a219afc006", "refsource": "CONFIRM", "url": "https://github.com/OISF/suricata/commit/fa692df37a796c3330c81988d15ef1a219afc006"}, {"name": "https://redmine.openinfosecfoundation.org/issues/3394", "refsource": "MISC", "url": "https://redmine.openinfosecfoundation.org/issues/3394"}, {"name": "https://github.com/OISF/suricata/commit/1c63d3905852f746ccde7e2585600b2199cefb4b", "refsource": "CONFIRM", "url": "https://github.com/OISF/suricata/commit/1c63d3905852f746ccde7e2585600b2199cefb4b"}, {"name": "[debian-lts-announce] 20200130 [SECURITY] [DLA 2087-1] suricata security update", "refsource": "MLIST", "url": "https://lists.debian.org/debian-lts-announce/2020/01/msg00032.html"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T02:02:39.647Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://redmine.openinfosecfoundation.org/issues/3324"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/OISF/suricata/commit/fa692df37a796c3330c81988d15ef1a219afc006"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://redmine.openinfosecfoundation.org/issues/3394"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/OISF/suricata/commit/1c63d3905852f746ccde7e2585600b2199cefb4b"}, {"name": "[debian-lts-announce] 20200130 [SECURITY] [DLA 2087-1] suricata security update", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "https://lists.debian.org/debian-lts-announce/2020/01/msg00032.html"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2019-18792", "datePublished": "2020-01-06T17:52:54.000Z", "dateReserved": "2019-11-06T00:00:00.000Z", "dateUpdated": "2024-08-05T02:02:39.647Z", "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:oisf:suricata:*:*:*:*:*:*:*:*", "matchCriteriaId": "FE67AEB2-4237-48F9-97F5-D80071AD27F2", "versionEndExcluding": "4.1.6", "versionStartIncluding": "4.1.5", "vulnerable": true}, {"criteria": "cpe:2.3:a:oisf:suricata:5.0.0:*:*:*:*:*:*:*", "matchCriteriaId": "91532ED8-EDCD-4220-9E0F-552B3D3C8AB4", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in Suricata 5.0.0. It is possible to bypass/evade any tcp based signature by overlapping a TCP segment with a fake FIN packet. The fake FIN packet is injected just before the PUSH ACK packet we want to bypass. The PUSH ACK packet (containing the data) will be ignored by Suricata because it overlaps the FIN packet (the sequence and ack number are identical in the two packets). The client will ignore the fake FIN packet because the ACK flag is not set. Both linux and windows clients are ignoring the injected packet."}, {"lang": "es", "value": "Se descubri\u00f3 un problema en Suricata versi\u00f3n 5.0.0. Es posible omitir y evadir cualquier firma basada en TCP mediante la superposici\u00f3n de un segmento TCP con un paquete FIN falso. El paquete FIN falso es inyectado justo antes del paquete PUSH ACK que queremos omitir. Suricata ignorar\u00e1 el paquete PUSH ACK (que contiene los datos) porque se superpone al paquete FIN (la secuencia y el n\u00famero ack son id\u00e9nticos en los dos paquetes). El cliente ignorar\u00e1 el paquete FIN falso porque el flag ACK no est\u00e1 configurado. Tanto los clientes de Linux y Windows ignoran el paquete inyectado."}], "id": "CVE-2019-18792", "lastModified": "2026-06-17T02:25:20.603", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.4, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/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": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-01-06T18:15:23.183", "references": [{"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/OISF/suricata/commit/1c63d3905852f746ccde7e2585600b2199cefb4b"}, {"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/OISF/suricata/commit/fa692df37a796c3330c81988d15ef1a219afc006"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2020/01/msg00032.html"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://redmine.openinfosecfoundation.org/issues/3324"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://redmine.openinfosecfoundation.org/issues/3394"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/OISF/suricata/commit/1c63d3905852f746ccde7e2585600b2199cefb4b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/OISF/suricata/commit/fa692df37a796c3330c81988d15ef1a219afc006"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2020/01/msg00032.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://redmine.openinfosecfoundation.org/issues/3324"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://redmine.openinfosecfoundation.org/issues/3394"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-436"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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