{"api_version":"1","generated_at":"2026-07-24T20:34:46+00:00","cve":"CVE-2021-31400","urls":{"html":"https://cve.report/CVE-2021-31400","api":"https://cve.report/api/cve/CVE-2021-31400.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-31400","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-31400"},"summary":{"title":"CVE-2021-31400","description":"An issue was discovered in tcp_pulloutofband() in tcp_in.c in HCC embedded InterNiche 4.0.1. The TCP out-of-band urgent-data processing function invokes a panic function if the pointer to the end of the out-of-band data points outside of the TCP segment's data. If the panic function hadn't a trap invocation removed, it will enter an infinite loop and therefore cause DoS (continuous loop or a device reset).","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2021-08-19 11:15:00","updated_at":"2021-08-26 17:17:00"},"problem_types":["CWE-835"],"metrics":[],"references":[{"url":"https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/","name":"https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/","refsource":"MISC","tags":[],"title":"New Critical Operational Technology Vulnerabilities Found on NicheStack – Mitigation Advised - Forescout","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.kb.cert.org/vuls/id/608209","name":"VU#608209","refsource":"CERT-VN","tags":[],"title":"VU#608209 - NicheStack embedded TCP/IP has vulnerabilities","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-31400","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31400","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"31400","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"hcc-embedded","cpe5":"nichestack","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2021-31400","qid":"590785","title":"Schneider Electric Lexium ILE ILA ILS and Altivar Multiple Vulnerabilities (SEVD-2021-217-01)"},{"cve":"CVE-2021-31400","qid":"591068","title":"Rockwell Automation Products INFRA:HALT Interniche Multiple Vulnerabilities (PN1575)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2021-31400","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 tcp_pulloutofband() in tcp_in.c in HCC embedded InterNiche 4.0.1. The TCP out-of-band urgent-data processing function invokes a panic function if the pointer to the end of the out-of-band data points outside of the TCP segment's data. If the panic function hadn't a trap invocation removed, it will enter an infinite loop and therefore cause DoS (continuous loop or a device reset)."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"refsource":"MISC","name":"https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/","url":"https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/"},{"refsource":"CERT-VN","name":"VU#608209","url":"https://www.kb.cert.org/vuls/id/608209"}]}},"nvd":{"publishedDate":"2021-08-19 11:15:00","lastModifiedDate":"2021-08-26 17:17:00","problem_types":["CWE-835"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL","baseScore":5},"severity":"MEDIUM","exploitabilityScore":10,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:hcc-embedded:nichestack:*:*:*:*:*:*:*:*","versionEndExcluding":"4.3","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"31400","Ordinal":"206685","Title":"CVE-2021-31400","CVE":"CVE-2021-31400","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"31400","Ordinal":"1","NoteData":"An issue was discovered in tcp_pulloutofband() in tcp_in.c in HCC embedded InterNiche 4.0.1. The TCP out-of-band urgent-data processing function invokes a panic function if the pointer to the end of the out-of-band data points outside of the TCP segment's data. If the panic function hadn't a trap invocation removed, it will enter an infinite loop and therefore cause DoS (continuous loop or a device reset).","Type":"Description","Title":null},{"CveYear":"2021","CveId":"31400","Ordinal":"2","NoteData":"2021-08-19","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"31400","Ordinal":"3","NoteData":"2021-08-19","Type":"Other","Title":"Modified"}]}}}