{"api_version":"1","generated_at":"2026-07-23T11:02:39+00:00","cve":"CVE-1999-1150","urls":{"html":"https://cve.report/CVE-1999-1150","api":"https://cve.report/api/cve/CVE-1999-1150.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-1999-1150","nvd":"https://nvd.nist.gov/vuln/detail/CVE-1999-1150"},"summary":{"title":"CVE-1999-1150","description":"Livingston Portmaster routers running ComOS use the same initial sequence number (ISN) for TCP connections, which allows remote attackers to conduct spoofing and hijack TCP sessions.","state":"PUBLISHED","assigner":"mitre","published_at":"1998-06-30 04:00:00","updated_at":"2025-04-03 01:03:51"},"problem_types":["NVD-CWE-Other","n/a"],"metrics":[{"version":"2.0","source":"nvd@nist.gov","type":"Primary","score":"7.5","severity":"","vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","data":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P","baseScore":7.5,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"}}],"references":[{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/1882","name":"https://exchange.xforce.ibmcloud.com/vulnerabilities/1882","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"IBM X-Force Exchange","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.securityfocus.com/archive/1/9723","name":"http://www.securityfocus.com/archive/1/9723","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"],"title":"SecurityFocus","mime":"text/html","httpstatus":"-1","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-1999-1150","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-1999-1150","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"n/a","product":"n/a","version":"affected n/a","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"1999","cve_id":"1150","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"livingston_portmaster","cpe5":"portmaster","cpe6":"initial","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"providerMetadata":{"dateUpdated":"2024-08-01T17:02:53.746Z","orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE"},"references":[{"name":"19980630 Livingston Portmaster - ISN generation is loosy!","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"],"url":"http://www.securityfocus.com/archive/1/9723"},{"name":"portmaster-fixed-isn(1882)","tags":["vdb-entry","x_refsource_XF","x_transferred"],"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/1882"}],"title":"CVE Program Container"}],"cna":{"affected":[{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}],"datePublic":"1998-06-30T00:00:00.000Z","descriptions":[{"lang":"en","value":"Livingston Portmaster routers running ComOS use the same initial sequence number (ISN) for TCP connections, which allows remote attackers to conduct spoofing and hijack TCP sessions."}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"dateUpdated":"2017-12-18T21:57:01.000Z","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","shortName":"mitre"},"references":[{"name":"19980630 Livingston Portmaster - ISN generation is loosy!","tags":["mailing-list","x_refsource_BUGTRAQ"],"url":"http://www.securityfocus.com/archive/1/9723"},{"name":"portmaster-fixed-isn(1882)","tags":["vdb-entry","x_refsource_XF"],"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/1882"}],"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-1999-1150","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":"Livingston Portmaster routers running ComOS use the same initial sequence number (ISN) for TCP connections, which allows remote attackers to conduct spoofing and hijack TCP sessions."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"19980630 Livingston Portmaster - ISN generation is loosy!","refsource":"BUGTRAQ","url":"http://www.securityfocus.com/archive/1/9723"},{"name":"portmaster-fixed-isn(1882)","refsource":"XF","url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/1882"}]}}}},"cveMetadata":{"assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","assignerShortName":"mitre","cveId":"CVE-1999-1150","datePublished":"2001-09-12T04:00:00.000Z","dateReserved":"2001-08-31T00:00:00.000Z","dateUpdated":"2024-08-01T17:02:53.746Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.1"},"nvd":{"publishedDate":"1998-06-30 04:00:00","lastModifiedDate":"2025-04-03 01:03:51","problem_types":["NVD-CWE-Other","n/a"],"metrics":{"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P","baseScore":7.5,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"},"baseSeverity":"HIGH","exploitabilityScore":10,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:h:livingston_portmaster:portmaster:initial:*:*:*:*:*:*:*","matchCriteriaId":"CBBFF404-7EDB-417C-B530-7EDEC38B3475"}]}]}]},"legacy_mitre":{"record":{"CveYear":"1999","CveId":"1150","Ordinal":"1","Title":"CVE-1999-1150","CVE":"CVE-1999-1150","Year":"1999"},"notes":[{"CveYear":"1999","CveId":"1150","Ordinal":"1","NoteData":"Livingston Portmaster routers running ComOS use the same initial sequence number (ISN) for TCP connections, which allows remote attackers to conduct spoofing and hijack TCP sessions.","Type":"Description","Title":"CVE-1999-1150"},{"CveYear":"1999","CveId":"1150","Ordinal":"2","NoteData":"2001-09-12","Type":"Other","Title":"Published"},{"CveYear":"1999","CveId":"1150","Ordinal":"3","NoteData":"2017-12-18","Type":"Other","Title":"Modified"}]}}}