{"item": {"cve_id": "CVE-2017-6627", "ghsa_id": "", "osv_id": "", "title": "CVE-2017-6627", "description": "A vulnerability in the UDP processing code of Cisco IOS 15.1, 15.2, and 15.4 and IOS XE 3.14 through 3.18 could allow an unauthenticated, remote attacker to cause the input queue of an affected system to hold UDP packets, causing an interface queue wedge and a denial of service (DoS) condition. The vulnerability is due to Cisco IOS Software application changes that create UDP sockets and leave the sockets idle without closing them. An attacker could exploit this vulnerability by sending UDP packets with a destination port of 0 to an affected device. A successful exploit could allow the attacker to cause UDP packets to be held in the input interfaces queue, resulting in a DoS condition. The input interface queue will stop holding UDP packets when it receives 250 packets. Cisco Bug IDs: CSCup10024, CSCva55744, CSCva95506.", "published_at": "2017-09-07T21:29:00.660", "modified_at": "2026-06-17T01:22:40.730", "vendor": "Cisco", "product": "Ios", "affected_versions": ["Cisco IOS and Cisco IOS XE"], "fixed_versions": [], "cvss_score": 7.5, "cvss_version": "3.1", "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "severity": "HIGH", "epss_score": 0.06158, "epss_percentile": 0.93283, "epss_date": "2026-10-06", "is_kev": true, "kev_date": "2022-03-03", "kev_due_date": "2022-03-24", "kev_action": "Apply updates per vendor instructions.", "cwe_ids": ["CWE-399", "CWE-404"], "attack_vector": "NETWORK", "attack_complexity": "LOW", "privileges_required": "NONE", "user_interaction": "NONE", "references": ["http://www.securityfocus.com/bid/100644", "http://www.securitytracker.com/id/1039289", "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-ios-udp", "http://www.securityfocus.com/bid/100644", "http://www.securitytracker.com/id/1039289", "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-ios-udp", "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6627"], "source_urls": {"NVD": "https://nvd.nist.gov/vuln/detail/CVE-2017-6627", "CVE.org": "https://www.cve.org/CVERecord?id=CVE-2017-6627", "CISA": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6627", "FIRST EPSS": "https://api.first.org/data/v1/epss?cve=CVE-2017-6627"}, "patch_available": null, "workaround_available": null, "sources": ["NVD", "CVE.org", "CISA", "FIRST EPSS"], "reference_items": [{"url": "http://www.securityfocus.com/bid/100644", "tags": ["Broken Link", "Third Party Advisory", "VDB Entry"], "source": "NVD", "name": ""}, {"url": "http://www.securitytracker.com/id/1039289", "tags": ["Broken Link", "Third Party Advisory", "VDB Entry"], "source": "NVD", "name": ""}, {"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-ios-udp", "tags": ["Mitigation", "Vendor Advisory"], "source": "NVD", "name": ""}, {"url": "http://www.securityfocus.com/bid/100644", "tags": ["Broken Link", "Third Party Advisory", "VDB Entry", "vdb-entry", "x_refsource_BID", "x_transferred"], "source": "NVD", "name": ""}, {"url": "http://www.securitytracker.com/id/1039289", "tags": ["Broken Link", "Third Party Advisory", "VDB Entry", "vdb-entry", "x_refsource_SECTRACK", "x_transferred"], "source": "NVD", "name": ""}, {"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-ios-udp", "tags": ["Mitigation", "Vendor Advisory", "x_refsource_CONFIRM", "x_transferred"], "source": "NVD", "name": ""}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6627", "tags": ["US Government Resource", "government-resource"], "source": "NVD", "name": ""}], "cvss_v4_score": null, "cvss_v4_vector": "", "cvss_v4_severity": "", "nvd_status": "Analyzed", "cna": "cisco", "date_reserved": "2017-03-09T00:00:00.000Z", "ssvc": {"options": {"Exploitation": "active", "Automatable": "yes", "Technical Impact": "partial"}, "version": "2.0.3", "timestamp": "2025-02-04T15:23:07.787870Z", "role": "CISA Coordinator"}, "affected_products": [{"vendor": "Cisco", "product": "Ios", "ranges": ["15.1(2)gc", "15.1(2)gc1", "15.1(2)gc2", "15.1(4)gc", "15.1(4)gc1", "15.1(4)gc2", "15.2(1)gc", "15.2(1)gc1", "15.2(1)gc2", "15.2(2)gc", "15.2(3)gc", "15.2(3)gc1", "15.2(3r)gca", "15.2(4)gc"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Cisco", "product": "Ios Xe", "ranges": ["3.14.0s", "3.14.1s", "3.14.2s", "3.14.3s", "3.14.4s", "3.15.0s", "3.15.1cs", "3.15.1s", "3.15.2s", "3.15.3s", "3.15.4s", "3.16.0cs", "3.16.0s", "3.16.1as"], "first_unaffected": [], "source": "NVD"}, {"vendor": "n/a", "product": "Cisco IOS and Cisco IOS XE", "ranges": ["Cisco IOS and Cisco IOS XE"], "first_unaffected": [], "source": "CVE.org"}], "kev_name": "Cisco IOS Software and Cisco IOS XE Software UDP Packet Processing Denial-of-Service Vulnerability", "kev_short_description": "A vulnerability in the UDP processing code of Cisco IOS and IOS XE could allow an unauthenticated, remote attacker to cause the input queue of an affected system to hold UDP packets, causing an interface queue wedge and denial of service.", "kev_ransomware": "Unknown", "kev_notes": "https://nvd.nist.gov/vuln/detail/CVE-2017-6627", "kev_cwes": ["CWE-399"], "wordfence_id": "", "mentions_sources": [], "version_match": "unknown", "risk_score": 56, "risk_class": "Important", "impact": {"confidentialite": "aucun", "integrite": "aucun", "disponibilite": "élevé", "summary": "Un attaquant exploitant cette vulnérabilité pourrait, selon les conditions décrites par les sources, exploitable à distance (réseau), sans authentification préalable, affecter la disponibilité du service.", "basis": "CVSS 3.1"}, "mechanism": "Déni de service : indisponibilité possible du service.", "mitigation": {"correction": {"available": false, "text": "Correctif non identifié dans les sources consultées. Appliquer la mise à jour de l'éditeur dès qu'elle est disponible."}, "mitigation": {"specific": "Aucune mesure de mitigation spécifique confirmée par les sources consultées. Consultez les références officielles pour d'éventuelles mesures détaillées.", "general": ["Maintenir le produit à jour et activer les mises à jour de sécurité.", "Restreindre l'exposition réseau du service au strict nécessaire.", "Appliquer le principe du moindre privilège.", "Surveiller les journaux et les alertes de sécurité."], "specific_links": []}, "containment": {"applicable": true, "actions": ["Action recommandée par la CISA : Apply updates per vendor instructions.", "Isoler ou restreindre l'accès au service concerné.", "Restreindre les flux réseau entrants/sortants liés au composant.", "Renforcer la surveillance des journaux et des accès.", "Désactiver temporairement le composant vulnérable si l'activité le permet."]}, "note": "Priorité aux consignes officielles de l'éditeur et des références. Vérifiez toujours l'avis de sécurité avant toute intervention en production.", "official_links": [{"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-ios-udp", "groupe": "avis_editeur", "groupe_titre": "Avis de sécurité de l'éditeur", "editeur": "Cisco", "domaine": "tools.cisco.com"}]}, "plain": {"verdict": "now", "verdict_label": "Exploité par des attaquants · à traiter aujourd'hui", "verdict_css": "now", "verdict_rank": 0, "headline": "Le service peut être rendu indisponible, à distance et sans compte", "headline_is_derived": true, "action": "Action officielle recommandée par la CISA : Installer les mises à jour publiées par l'éditeur.", "action_kind": "official", "concerned": [{"version": "Cisco IOS and Cisco IOS XE", "state": "hit", "state_label": "Concerné", "todo": "Action officielle recommandée par la CISA : Installer les mises à jour publiées par l'éditeur."}, {"version": "Je ne connais pas ma version", "state": "unknown", "state_label": "À vérifier", "todo": "La version s'affiche généralement dans le menu « À propos » ou « Aide » du logiciel."}], "steps": [{"title": "Sauvegarder avant d'intervenir", "detail": "Une copie récente des données et de la configuration. Si votre hébergeur propose une sauvegarde en un clic, c'est le moment.", "duration": "10 min", "priority": false}, {"title": "Action officielle recommandée par la CISA : Installer les mises à jour publiées par l'éditeur", "detail": "C'est la correction officielle. Tant qu'elle n'est pas appliquée, les autres mesures ne sont que temporaires.", "duration": "15 à 45 min", "priority": true}, {"title": "En attendant : réduire l'exposition sur Internet", "detail": "La faille est exploitable à distance. Limiter l'accès au service depuis l'extérieur (pare-feu, filtrage d'adresses, VPN) réduit fortement le risque.", "duration": "30 min", "priority": false}, {"title": "Vérifier que vous n'avez pas déjà été touché", "detail": "Cette faille est activement exploitée. Contrôler les comptes créés récemment, les connexions inhabituelles et les fichiers modifiés depuis la date de publication.", "duration": "30 min", "priority": true}, {"title": "Confirmer que tout fonctionne encore", "detail": "Après correction : page d'accueil, connexion, et les deux ou trois fonctions dont vous vous servez tous les jours.", "duration": "10 min", "priority": false}], "exploited": true, "exploited_label": "Oui, des attaques réelles sont constatées", "fixed_label": "Correctif non identifié dans les sources", "affected_label": "Cisco IOS and Cisco IOS XE"}, "severity_display": "Élevée", "cvss_is_legacy": false, "risk_score_computable": true, "identifier": "CVE-2017-6627", "severity_fr": "Élevée", "epss_pct": 6.2, "source_records": [{"source": "NVD", "label": "NVD, NIST", "date_label": "Publié dans la base", "date": "2017-09-07", "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-6627"}, {"source": "CVE.org", "label": "CVE.org, programme CVE", "date_label": "Publié par l'organisme CNA", "date": "2017-09-07", "url": "https://www.cve.org/CVERecord?id=CVE-2017-6627"}, {"source": "CISA", "label": "CISA KEV", "date_label": "Ajout au catalogue", "date": "2022-03-03", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6627"}, {"source": "FIRST EPSS", "label": "FIRST EPSS", "date_label": "Score daté du", "date": "2026-10-06", "url": "https://api.first.org/data/v1/epss?cve=CVE-2017-6627"}], "exploit_public": false, "reseau_sans_auth": true, "exposition": "À distance, sans compte et sans action d'un utilisateur", "owasp": []}, "presentation": {"en_bref": [{"question": "Est-elle attaquée ?", "ton": "alerte", "reponse": "Oui, attaques constatées", "source": "Catalogue CISA KEV"}, {"question": "Existe-t-il un correctif ?", "ton": "vigilance", "reponse": "Non identifié dans les sources", "source": "Vérifier l'avis de l'éditeur"}, {"question": "Comment l'attaquer ?", "ton": "alerte", "reponse": "À distance, sans compte et sans action d'un utilisateur", "source": "Vecteur CVSS publié"}, {"question": "Risque d'exploitation", "ton": "vigilance", "reponse": "6,2 % sur 30 jours", "source": "Plus probable que 93 % des failles connues"}], "references": [{"cle": "avis_editeur", "titre": "Avis de sécurité de l'éditeur", "explication": "La parole de l'éditeur du produit : elle fait foi pour savoir quoi installer.", "items": [{"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-ios-udp", "domaine": "tools.cisco.com", "editeur": "Cisco", "etiquettes": ["Mesure de contournement", "Avis de l'éditeur"], "nom": "", "lien": true, "casse": false}]}, {"cle": "avis_tiers", "titre": "Avis d'autorités et d'organismes tiers", "explication": "CERT, agences gouvernementales, bases de vulnérabilités, chercheurs.", "items": [{"url": "http://www.securityfocus.com/bid/100644", "domaine": "www.securityfocus.com", "editeur": "", "etiquettes": ["Lien signalé cassé", "Avis d'un tiers", "Base de vulnérabilités"], "nom": "", "lien": true, "casse": true}, {"url": "http://www.securitytracker.com/id/1039289", "domaine": "www.securitytracker.com", "editeur": "", "etiquettes": ["Lien signalé cassé", "Avis d'un tiers", "Base de vulnérabilités"], "nom": "", "lien": true, "casse": true}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6627", "domaine": "www.cisa.gov", "editeur": "CISA", "etiquettes": ["Ressource gouvernementale américaine", "Ressource gouvernementale"], "nom": "", "lien": true, "casse": false}]}], "liens_correction": [{"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-ios-udp", "domaine": "tools.cisco.com", "editeur": "Cisco", "etiquettes": ["Mesure de contournement", "Avis de l'éditeur"], "nom": "", "lien": true, "casse": false, "groupe": "avis_editeur", "groupe_titre": "Avis de sécurité de l'éditeur"}], "nb_exploits": 0, "cvss": {"version": "3.1", "vecteur": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "metriques": [{"code": "AV", "nom": "Vecteur d'attaque", "valeur": "Réseau (à distance, y compris par Internet)", "brut": "N", "explication": "D'où l'attaquant doit agir."}, {"code": "AC", "nom": "Complexité de l'attaque", "valeur": "Faible", "brut": "L", "explication": "Conditions hors du contrôle de l'attaquant."}, {"code": "PR", "nom": "Privilèges requis", "valeur": "Aucun (pas de compte)", "brut": "N", "explication": "Droits dont l'attaquant a besoin avant d'attaquer."}, {"code": "UI", "nom": "Interaction de l'utilisateur", "valeur": "Aucune", "brut": "N", "explication": "Une victime doit-elle cliquer ou ouvrir quelque chose ?"}, {"code": "S", "nom": "Portée", "valeur": "Inchangée", "brut": "U", "explication": "L'attaque peut-elle toucher d'autres composants que celui qui est vulnérable ?"}, {"code": "C", "nom": "Confidentialité", "valeur": "Aucun", "brut": "N", "explication": "Accès à des informations protégées."}, {"code": "I", "nom": "Intégrité", "valeur": "Aucun", "brut": "N", "explication": "Modification de données ou du système."}, {"code": "A", "nom": "Disponibilité", "valeur": "Élevé", "brut": "H", "explication": "Arrêt ou ralentissement du service."}], "calculateur": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "specification": "https://www.first.org/cvss/v3.1/specification-document"}, "cvss4": null, "cwe": [{"id": "CWE-399", "nom": "", "url": "https://cwe.mitre.org/data/definitions/399.html"}, {"id": "CWE-404", "nom": "", "url": "https://cwe.mitre.org/data/definitions/404.html"}], "owasp": [], "ssvc": {"lignes": [{"nom": "Exploitation", "valeur": "Exploitation active constatée", "brut": "active"}, {"nom": "Automatisable", "valeur": "Oui : l'attaque peut être enchaînée sans intervention humaine", "brut": "yes"}, {"nom": "Impact technique", "valeur": "Partiel : contrôle ou informations limités", "brut": "partial"}], "version": "2.0.3", "date": "2025-02-04", "role": "CISA Coordinator", "url": "https://www.cisa.gov/stakeholder-specific-vulnerability-categorization-ssvc"}, "chronologie": [{"date": "2017-03-09", "libelle": "Identifiant réservé", "qui": "Programme CVE"}, {"date": "2017-09-07", "libelle": "Publication de la vulnérabilité", "qui": "cisco"}, {"date": "2022-03-03", "libelle": "Ajout au catalogue des failles exploitées", "qui": "CISA"}, {"date": "2022-03-24", "libelle": "Échéance de correction fixée par la CISA", "qui": "CISA"}, {"date": "2025-02-04", "libelle": "Décision SSVC publiée", "qui": "CISA"}, {"date": "2026-06-17", "libelle": "Dernière mise à jour de la fiche source", "qui": "Source"}, {"date": "2026-10-06", "libelle": "Calcul du score EPSS affiché", "qui": "FIRST"}], "liens_officiels": [{"nom": "NVD (NIST)", "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-6627", "description": "Fiche de référence : CVSS, CPE, références étiquetées."}, {"nom": "CVE.org", "url": "https://www.cve.org/CVERecord?id=CVE-2017-6627", "description": "Enregistrement officiel publié par l'organisme qui a attribué l'identifiant."}, {"nom": "CISA KEV", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6627", "description": "Entrée du catalogue des failles activement exploitées."}, {"nom": "FIRST EPSS", "url": "https://api.first.org/data/v1/epss?cve=CVE-2017-6627", "description": "Score de probabilité d'exploitation du jour."}, {"nom": "OSV.dev", "url": "https://osv.dev/vulnerability/CVE-2017-6627", "description": "Paquets open source concernés et versions corrigées."}, {"nom": "GitHub Advisory Database", "url": "https://github.com/advisories?query=CVE-2017-6627", "description": "Avis de sécurité des dépendances logicielles."}], "produits": [{"vendor": "Cisco", "product": "Ios", "ranges": ["15.1(2)gc", "15.1(2)gc1", "15.1(2)gc2", "15.1(4)gc", "15.1(4)gc1", "15.1(4)gc2", "15.2(1)gc", "15.2(1)gc1", "15.2(1)gc2", "15.2(2)gc", "15.2(3)gc", "15.2(3)gc1", "15.2(3r)gca", "15.2(4)gc"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Cisco", "product": "Ios Xe", "ranges": ["3.14.0s", "3.14.1s", "3.14.2s", "3.14.3s", "3.14.4s", "3.15.0s", "3.15.1cs", "3.15.1s", "3.15.2s", "3.15.3s", "3.15.4s", "3.16.0cs", "3.16.0s", "3.16.1as"], "first_unaffected": [], "source": "NVD"}, {"vendor": "n/a", "product": "Cisco IOS and Cisco IOS XE", "ranges": ["Cisco IOS and Cisco IOS XE"], "first_unaffected": [], "source": "CVE.org"}], "notes_kev": ["https://nvd.nist.gov/vuln/detail/CVE-2017-6627"]}, "consulted_at": "2026-10-07T00:03:44.055332+00:00"}