CVE-2018-6922

{"containers": {"cna": {"affected": [{"product": "FreeBSD", "vendor": "FreeBSD", "versions": [{"status": "affected", "version": "All versions prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, 10.4-RELEASE-p10"}]}], "datePublic": "2018-08-08T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "One of the data structures that holds TCP segments in all versions of FreeBSD prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, and 10.4-RELEASE-p10 uses an inefficient algorithm to reassemble the data. This causes the CPU time spent on segment processing to grow linearly with the number of segments in the reassembly queue. An attacker who has the ability to send TCP traffic to a victim system can degrade the victim system's network performance and/or consume excessive CPU by exploiting the inefficiency of TCP reassembly handling, with relatively small bandwidth cost."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-400", "description": "CWE-400: Uncontrolled Resource Consumption ('Resource Exhaustion')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2019-01-16T18:57:01.000Z", "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109", "shortName": "freebsd"}, "references": [{"name": "FreeBSD-SA-18:08", "tags": ["vendor-advisory", "x_refsource_FREEBSD"], "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-18:08.tcp.asc"}, {"name": "1041425", "tags": ["vdb-entry", "x_refsource_SECTRACK"], "url": "http://www.securitytracker.com/id/1041425"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html"}, {"name": "105058", "tags": ["vdb-entry", "x_refsource_BID"], "url": "http://www.securityfocus.com/bid/105058"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://security.netapp.com/advisory/ntap-20180815-0002/"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "secteam@freebsd.org", "DATE_PUBLIC": "2018-08-08T00:00:00", "ID": "CVE-2018-6922", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "FreeBSD", "version": {"version_data": [{"version_value": "All versions prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, 10.4-RELEASE-p10"}]}}]}, "vendor_name": "FreeBSD"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "One of the data structures that holds TCP segments in all versions of FreeBSD prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, and 10.4-RELEASE-p10 uses an inefficient algorithm to reassemble the data. This causes the CPU time spent on segment processing to grow linearly with the number of segments in the reassembly queue. An attacker who has the ability to send TCP traffic to a victim system can degrade the victim system's network performance and/or consume excessive CPU by exploiting the inefficiency of TCP reassembly handling, with relatively small bandwidth cost."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-400: Uncontrolled Resource Consumption ('Resource Exhaustion')"}]}]}, "references": {"reference_data": [{"name": "FreeBSD-SA-18:08", "refsource": "FREEBSD", "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-18:08.tcp.asc"}, {"name": "1041425", "refsource": "SECTRACK", "url": "http://www.securitytracker.com/id/1041425"}, {"name": "https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html", "refsource": "CONFIRM", "url": "https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html"}, {"name": "105058", "refsource": "BID", "url": "http://www.securityfocus.com/bid/105058"}, {"name": "https://security.netapp.com/advisory/ntap-20180815-0002/", "refsource": "CONFIRM", "url": "https://security.netapp.com/advisory/ntap-20180815-0002/"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T06:17:17.137Z"}, "title": "CVE Program Container", "references": [{"name": "FreeBSD-SA-18:08", "tags": ["vendor-advisory", "x_refsource_FREEBSD", "x_transferred"], "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-18:08.tcp.asc"}, {"name": "1041425", "tags": ["vdb-entry", "x_refsource_SECTRACK", "x_transferred"], "url": "http://www.securitytracker.com/id/1041425"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html"}, {"name": "105058", "tags": ["vdb-entry", "x_refsource_BID", "x_transferred"], "url": "http://www.securityfocus.com/bid/105058"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://security.netapp.com/advisory/ntap-20180815-0002/"}]}]}, "cveMetadata": {"assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109", "assignerShortName": "freebsd", "cveId": "CVE-2018-6922", "datePublished": "2018-08-09T18:00:00.000Z", "dateReserved": "2018-02-12T00:00:00.000Z", "dateUpdated": "2024-09-16T17:53:10.816Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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This causes the CPU time spent on segment processing to grow linearly with the number of segments in the reassembly queue. An attacker who has the ability to send TCP traffic to a victim system can degrade the victim system's network performance and/or consume excessive CPU by exploiting the inefficiency of TCP reassembly handling, with relatively small bandwidth cost."}, {"lang": "es", "value": "Una de las estructuras de datos que contienen segmentos TCP en todas las versiones de FreeBSD anteriores a 11.2-RELEASE-p1, 11.1-RELEASE-p12 y 10.4-RELEASE-p10 emplea un algoritmo ineficiente para volver a ensamblar los datos. Esto provoca que el tiempo de CPU que se gasta en el procesamiento de segmentos crezca linealmente con el n\u00famero de segmentos en la cola de reensamblado. Un atacante que pueda enviar tr\u00e1fico TCP en un sistema objetivo puede degradar el rendimiento de la red del sistema v\u00edctima y/o consumir demasiada CPU explotando la ineficiencia del manejo del reensamblado TCP, con un coste de ancho de banda relativamente peque\u00f1o."}], "id": "CVE-2018-6922", "lastModified": "2026-06-17T02:02:28.067", "metrics": {"cvssMetricV2": [{"acInsufInfo": true, "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}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2018-08-09T18:29:00.277", "references": [{"source": "secteam@freebsd.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/105058"}, {"source": "secteam@freebsd.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securitytracker.com/id/1041425"}, {"source": "secteam@freebsd.org", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20180815-0002/"}, {"source": "secteam@freebsd.org", "tags": ["Patch", "Vendor Advisory"], "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-18:08.tcp.asc"}, {"source": "secteam@freebsd.org", "tags": ["Patch"], "url": "https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/105058"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securitytracker.com/id/1041425"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20180815-0002/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-18:08.tcp.asc"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html"}], "sourceIdentifier": "secteam@freebsd.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "secteam@freebsd.org", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-400"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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