CVE-2002-0518

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "datePublic": "2002-04-16T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "The SYN cache (syncache) and SYN cookie (syncookie) mechanism in FreeBSD 4.5 and earlier allows remote attackers to cause a denial of service (crash) (1) via a SYN packet that is accepted using syncookies that causes a null pointer to be referenced for the socket's TCP options, or (2) by killing and restarting a process that listens on the same socket, which does not properly clear the old inpcb pointer on restart."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2005-08-17T00:00:00.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"name": "FreeBSD-SA-02:20", "tags": ["vendor-advisory", "x_refsource_FREEBSD"], "url": "ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:20.syncache.asc"}, {"name": "6046", "tags": ["vdb-entry", "x_refsource_OSVDB"], "url": "http://www.osvdb.org/6046"}, {"name": "bsd-syncookie-pointer-dos(8873)", "tags": ["vdb-entry", "x_refsource_XF"], "url": "http://www.iss.net/security_center/static/8873.php"}, {"name": "bsd-syncache-inpcb-dos(8875)", "tags": ["vdb-entry", "x_refsource_XF"], "url": "http://www.iss.net/security_center/static/8875.php"}, {"name": "4524", "tags": ["vdb-entry", "x_refsource_BID"], "url": "http://www.securityfocus.com/bid/4524"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2002-0518", "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": "The SYN cache (syncache) and SYN cookie (syncookie) mechanism in FreeBSD 4.5 and earlier allows remote attackers to cause a denial of service (crash) (1) via a SYN packet that is accepted using syncookies that causes a null pointer to be referenced for the socket's TCP options, or (2) by killing and restarting a process that listens on the same socket, which does not properly clear the old inpcb pointer on restart."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "FreeBSD-SA-02:20", "refsource": "FREEBSD", "url": "ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:20.syncache.asc"}, {"name": "6046", "refsource": "OSVDB", "url": "http://www.osvdb.org/6046"}, {"name": "bsd-syncookie-pointer-dos(8873)", "refsource": "XF", "url": "http://www.iss.net/security_center/static/8873.php"}, {"name": "bsd-syncache-inpcb-dos(8875)", "refsource": "XF", "url": "http://www.iss.net/security_center/static/8875.php"}, {"name": "4524", "refsource": "BID", "url": "http://www.securityfocus.com/bid/4524"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-08T02:49:28.879Z"}, "title": "CVE Program Container", "references": [{"name": "FreeBSD-SA-02:20", "tags": ["vendor-advisory", "x_refsource_FREEBSD", "x_transferred"], "url": "ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:20.syncache.asc"}, {"name": "6046", "tags": ["vdb-entry", "x_refsource_OSVDB", "x_transferred"], "url": "http://www.osvdb.org/6046"}, {"name": "bsd-syncookie-pointer-dos(8873)", "tags": ["vdb-entry", "x_refsource_XF", "x_transferred"], "url": "http://www.iss.net/security_center/static/8873.php"}, {"name": "bsd-syncache-inpcb-dos(8875)", "tags": ["vdb-entry", "x_refsource_XF", "x_transferred"], "url": "http://www.iss.net/security_center/static/8875.php"}, {"name": "4524", "tags": ["vdb-entry", "x_refsource_BID", "x_transferred"], "url": "http://www.securityfocus.com/bid/4524"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2002-0518", "datePublished": "2002-06-11T04:00:00.000Z", "dateReserved": "2002-06-07T00:00:00.000Z", "dateUpdated": "2024-08-08T02:49:28.879Z", "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:o:freebsd:freebsd:4.5:release:*:*:*:*:*:*", "matchCriteriaId": "3D41CB12-7894-4D25-80EC-23C56171D973", "vulnerable": true}, {"criteria": "cpe:2.3:o:freebsd:freebsd:4.5:stable:*:*:*:*:*:*", "matchCriteriaId": "09789843-6A1A-4CDB-97E8-89E82B79DDB5", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The SYN cache (syncache) and SYN cookie (syncookie) mechanism in FreeBSD 4.5 and earlier allows remote attackers to cause a denial of service (crash) (1) via a SYN packet that is accepted using syncookies that causes a null pointer to be referenced for the socket's TCP options, or (2) by killing and restarting a process that listens on the same socket, which does not properly clear the old inpcb pointer on restart."}, {"lang": "es", "value": "Los mecanismos SYN cache (syncache) y SYN cookie (syncookie) en FreeBSD 4.5 y anteriores, permite a atacantes remotos provocar la Denegaci\u00f3n de Servicios (por caida) por algunos de los siguiente m\u00e9todos:\r\n\r\n mediante un paquete SYN aceptado utilizando syncookies, que provoca que las opciones TCP del conector (socket) referencien a un puntero nulo.\r\n eliminando y reiniciando un proceso que espera en el mismo conector (socket) que no elimin\u00f3 adecuadamente el contenido anterior del puntero inpcb en el reinicio."}], "id": "CVE-2002-0518", "lastModified": "2026-06-16T21:57:35.900", "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}]}, "published": "2002-08-12T04:00:00.000", "references": [{"source": "cve@mitre.org", "url": "ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:20.syncache.asc"}, {"source": "cve@mitre.org", "url": "http://www.iss.net/security_center/static/8873.php"}, {"source": "cve@mitre.org", "tags": ["Patch", "Vendor Advisory"], "url": "http://www.iss.net/security_center/static/8875.php"}, {"source": "cve@mitre.org", "url": "http://www.osvdb.org/6046"}, {"source": "cve@mitre.org", "tags": ["Patch", "Vendor Advisory"], "url": "http://www.securityfocus.com/bid/4524"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:20.syncache.asc"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.iss.net/security_center/static/8873.php"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "http://www.iss.net/security_center/static/8875.php"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.osvdb.org/6046"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "http://www.securityfocus.com/bid/4524"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-Other"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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