{"item": {"cve_id": "CVE-2020-1350", "ghsa_id": "", "osv_id": "", "title": "CVE-2020-1350", "description": "A remote code execution vulnerability exists in Windows Domain Name System servers when they fail to properly handle requests, aka 'Windows DNS Server Remote Code Execution Vulnerability'.", "published_at": "2020-07-14T23:15:13.087", "modified_at": "2026-06-17T03:01:10.590", "vendor": "Microsoft", "product": "Windows Server 2008", "affected_versions": ["2019", "2019  (Core installation)", "2016", "2016  (Core installation)", "2008 for 32-bit Systems Service Pack 2", "2008 for 32-bit Systems Service Pack 2 (Core installation)", "2008 for x64-based Systems Service Pack 2", "2008 for x64-based Systems Service Pack 2 (Core installation)", "2008 R2 for x64-based Systems Service Pack 1", "2008 R2 for x64-based Systems Service Pack 1 (Core installation)", "2012", "2012 (Core installation)", "2012 R2", "2012 R2 (Core installation)", "unspecified"], "fixed_versions": [], "cvss_score": 10.0, "cvss_version": "3.1", "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "severity": "CRITICAL", "epss_score": 0.96721, "epss_percentile": 0.99885, "epss_date": "2026-10-07", "is_kev": true, "kev_date": "2021-11-03", "kev_due_date": "2022-05-03", "kev_action": "Apply updates per vendor instructions.", "cwe_ids": ["CWE-20"], "attack_vector": "NETWORK", "attack_complexity": "LOW", "privileges_required": "NONE", "user_interaction": "NONE", "references": ["http://packetstormsecurity.com/files/158484/SIGRed-Windows-DNS-Denial-Of-Service.html", "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1350", "http://packetstormsecurity.com/files/158484/SIGRed-Windows-DNS-Denial-Of-Service.html", "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1350", "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1350"], "source_urls": {"NVD": "https://nvd.nist.gov/vuln/detail/CVE-2020-1350", "CVE.org": "https://www.cve.org/CVERecord?id=CVE-2020-1350", "CISA": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1350", "FIRST EPSS": "https://api.first.org/data/v1/epss?cve=CVE-2020-1350"}, "patch_available": null, "workaround_available": null, "sources": ["NVD", "CVE.org", "CISA", "FIRST EPSS"], "reference_items": [{"url": "http://packetstormsecurity.com/files/158484/SIGRed-Windows-DNS-Denial-Of-Service.html", "tags": ["Third Party Advisory", "VDB Entry"], "source": "NVD", "name": ""}, {"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1350", "tags": ["Patch", "Vendor Advisory"], "source": "NVD", "name": ""}, {"url": "http://packetstormsecurity.com/files/158484/SIGRed-Windows-DNS-Denial-Of-Service.html", "tags": ["Third Party Advisory", "VDB Entry", "x_refsource_MISC", "x_transferred"], "source": "NVD", "name": ""}, {"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1350", "tags": ["Patch", "Vendor Advisory", "x_refsource_MISC", "x_transferred"], "source": "NVD", "name": ""}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1350", "tags": ["US Government Resource", "government-resource"], "source": "NVD", "name": ""}], "cvss_v4_score": null, "cvss_v4_vector": "", "cvss_v4_severity": "", "nvd_status": "Analyzed", "cna": "microsoft", "date_reserved": "2019-11-04T00:00:00.000Z", "ssvc": {"options": {"Exploitation": "active", "Automatable": "yes", "Technical Impact": "total"}, "version": "2.0.3", "timestamp": "2025-02-07T14:38:31.758044Z", "role": "CISA Coordinator"}, "affected_products": [{"vendor": "Microsoft", "product": "Windows Server 2008", "ranges": ["toutes versions (selon NVD)", "r2"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Server 2012", "ranges": ["toutes versions (selon NVD)", "r2"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Server 2016", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Server 2019", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Server", "ranges": ["2019", "2019  (Core installation)", "2016", "2016  (Core installation)", "2008 for 32-bit Systems Service Pack 2", "2008 for 32-bit Systems Service Pack 2 (Core installation)", "2008 for x64-based Systems Service Pack 2", "2008 for x64-based Systems Service Pack 2 (Core installation)", "2008 R2 for x64-based Systems Service Pack 1", "2008 R2 for x64-based Systems Service Pack 1 (Core installation)", "2012", "2012 (Core installation)", "2012 R2", "2012 R2 (Core installation)"], "first_unaffected": [], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows Server, version 1909 (Server Core installation)", "ranges": ["unspecified"], "first_unaffected": [], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows Server, version 1903 (Server Core installation)", "ranges": ["unspecified"], "first_unaffected": [], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows Server, version 2004 (Server Core installation)", "ranges": ["unspecified"], "first_unaffected": [], "source": "CVE.org"}], "kev_name": "Microsoft Windows DNS Server Remote Code Execution Vulnerability", "kev_short_description": "Microsoft Windows DNS Servers fail to properly handle requests, allowing an attacker to perform remote code execution in the context of the Local System Account. The vulnerability is also known under the moniker of SIGRed.", "kev_ransomware": "Unknown", "kev_notes": "Reference CISA's ED 20-03 (https://www.cisa.gov/news-events/directives/ed-20-03-mitigate-windows-dns-server-remote-code-execution-vulnerability-july-2020-patch-tuesday) for further guidance and requirements. Note: The due date for addressing this vulnerability aligns with the requirements outlined in ED 20-03. https://nvd.nist.gov/vuln/detail/CVE-2020-1350", "kev_cwes": [], "wordfence_id": "", "mentions_sources": [], "version_match": "unknown", "risk_score": 81, "risk_class": "Critique", "impact": {"confidentialite": "élevé", "integrite": "élevé", "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 confidentialité des données, l'intégrité du système et la disponibilité du service.", "basis": "CVSS 3.1"}, "mechanism": "Validation d'entrée insuffisante : des données non conformes sont acceptées.", "mitigation": {"correction": {"available": true, "text": "Appliquer le correctif de l'éditeur dès que possible (lien ci-dessous)."}, "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://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1350", "groupe": "correctif", "groupe_titre": "Correctifs et versions corrigées", "editeur": "Microsoft", "domaine": "portal.msrc.microsoft.com"}]}, "plain": {"verdict": "now", "verdict_label": "Exploité par des attaquants · à traiter aujourd'hui", "verdict_css": "now", "verdict_rank": 0, "headline": "Des données mal vérifiées sont acceptées par Windows Server 2008, 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": "2019, 2019  (Core installation), 2016, 2016  (Core installation)", "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": "2019, 2019  (Core installation), 2016, 2016  (Core installation)"}, "severity_display": "Critique", "cvss_is_legacy": false, "risk_score_computable": true, "identifier": "CVE-2020-1350", "severity_fr": "Critique", "epss_pct": 96.7, "source_records": [{"source": "NVD", "label": "NVD, NIST", "date_label": "Publié dans la base", "date": "2020-07-14", "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-1350"}, {"source": "CVE.org", "label": "CVE.org, programme CVE", "date_label": "Publié par l'organisme CNA", "date": "2020-07-14", "url": "https://www.cve.org/CVERecord?id=CVE-2020-1350"}, {"source": "CISA", "label": "CISA KEV", "date_label": "Ajout au catalogue", "date": "2021-11-03", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1350"}, {"source": "FIRST EPSS", "label": "FIRST EPSS", "date_label": "Score daté du", "date": "2026-10-07", "url": "https://api.first.org/data/v1/epss?cve=CVE-2020-1350"}], "exploit_public": false, "reseau_sans_auth": true, "exposition": "À distance, sans compte et sans action d'un utilisateur", "owasp": [{"code": "A05", "nom": "Injection", "nom_officiel": "Injection", "slug": "a05-injection", "libelle": "A05:2025 Injection", "url_officielle": "https://top10.owasp.org/2025/A05_2025-Injection/"}]}, "presentation": {"en_bref": [{"question": "Est-elle attaquée ?", "ton": "alerte", "reponse": "Oui, attaques constatées", "source": "Catalogue CISA KEV"}, {"question": "Existe-t-il un correctif ?", "ton": "bon", "reponse": "Oui, un correctif est référencé", "source": "Lien étiqueté « correctif »"}, {"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": "alerte", "reponse": "96,7 % sur 30 jours", "source": "Plus probable que 100 % des failles connues"}], "references": [{"cle": "correctif", "titre": "Correctifs et versions corrigées", "explication": "Les pages que les sources désignent comme correctif ou notes de version.", "items": [{"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1350", "domaine": "portal.msrc.microsoft.com", "editeur": "Microsoft", "etiquettes": ["Correctif", "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://packetstormsecurity.com/files/158484/SIGRed-Windows-DNS-Denial-Of-Service.html", "domaine": "packetstormsecurity.com", "editeur": "Packet Storm", "etiquettes": ["Avis d'un tiers", "Base de vulnérabilités"], "nom": "", "lien": true, "casse": false}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1350", "domaine": "www.cisa.gov", "editeur": "CISA", "etiquettes": ["Ressource gouvernementale américaine", "Ressource gouvernementale"], "nom": "", "lien": true, "casse": false}]}], "liens_correction": [{"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1350", "domaine": "portal.msrc.microsoft.com", "editeur": "Microsoft", "etiquettes": ["Correctif", "Avis de l'éditeur"], "nom": "", "lien": true, "casse": false, "groupe": "correctif", "groupe_titre": "Correctifs et versions corrigées"}], "nb_exploits": 0, "cvss": {"version": "3.1", "vecteur": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/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": "Modifiée (d'autres composants peuvent être touchés)", "brut": "C", "explication": "L'attaque peut-elle toucher d'autres composants que celui qui est vulnérable ?"}, {"code": "C", "nom": "Confidentialité", "valeur": "Élevé", "brut": "H", "explication": "Accès à des informations protégées."}, {"code": "I", "nom": "Intégrité", "valeur": "Élevé", "brut": "H", "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:C/C:H/I:H/A:H", "specification": "https://www.first.org/cvss/v3.1/specification-document"}, "cvss4": null, "cwe": [{"id": "CWE-20", "nom": "Improper Input Validation", "url": "https://cwe.mitre.org/data/definitions/20.html"}], "owasp": [{"code": "A05", "nom": "Injection", "nom_officiel": "Injection", "slug": "a05-injection", "libelle": "A05:2025 Injection", "url_officielle": "https://top10.owasp.org/2025/A05_2025-Injection/"}], "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": "Total : contrôle complet du composant ou de ses informations", "brut": "total"}], "version": "2.0.3", "date": "2025-02-07", "role": "CISA Coordinator", "url": "https://www.cisa.gov/stakeholder-specific-vulnerability-categorization-ssvc"}, "chronologie": [{"date": "2019-11-04", "libelle": "Identifiant réservé", "qui": "Programme CVE"}, {"date": "2020-07-14", "libelle": "Publication de la vulnérabilité", "qui": "microsoft"}, {"date": "2021-11-03", "libelle": "Ajout au catalogue des failles exploitées", "qui": "CISA"}, {"date": "2022-05-03", "libelle": "Échéance de correction fixée par la CISA", "qui": "CISA"}, {"date": "2025-02-07", "libelle": "Décision SSVC publiée", "qui": "CISA"}, {"date": "2026-06-17", "libelle": "Dernière mise à jour de la fiche source", "qui": "Source"}, {"date": "2026-10-07", "libelle": "Calcul du score EPSS affiché", "qui": "FIRST"}], "liens_officiels": [{"nom": "NVD (NIST)", "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-1350", "description": "Fiche de référence : CVSS, CPE, références étiquetées."}, {"nom": "CVE.org", "url": "https://www.cve.org/CVERecord?id=CVE-2020-1350", "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-2020-1350", "description": "Entrée du catalogue des failles activement exploitées."}, {"nom": "FIRST EPSS", "url": "https://api.first.org/data/v1/epss?cve=CVE-2020-1350", "description": "Score de probabilité d'exploitation du jour."}, {"nom": "OSV.dev", "url": "https://osv.dev/vulnerability/CVE-2020-1350", "description": "Paquets open source concernés et versions corrigées."}, {"nom": "GitHub Advisory Database", "url": "https://github.com/advisories?query=CVE-2020-1350", "description": "Avis de sécurité des dépendances logicielles."}], "produits": [{"vendor": "Microsoft", "product": "Windows Server 2008", "ranges": ["toutes versions (selon NVD)", "r2"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Server 2012", "ranges": ["toutes versions (selon NVD)", "r2"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Server 2016", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Server 2019", "ranges": ["toutes versions (selon NVD)"], "first_unaffected": [], "source": "NVD"}, {"vendor": "Microsoft", "product": "Windows Server", "ranges": ["2019", "2019  (Core installation)", "2016", "2016  (Core installation)", "2008 for 32-bit Systems Service Pack 2", "2008 for 32-bit Systems Service Pack 2 (Core installation)", "2008 for x64-based Systems Service Pack 2", "2008 for x64-based Systems Service Pack 2 (Core installation)", "2008 R2 for x64-based Systems Service Pack 1", "2008 R2 for x64-based Systems Service Pack 1 (Core installation)", "2012", "2012 (Core installation)", "2012 R2", "2012 R2 (Core installation)"], "first_unaffected": [], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows Server, version 1909 (Server Core installation)", "ranges": ["unspecified"], "first_unaffected": [], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows Server, version 1903 (Server Core installation)", "ranges": ["unspecified"], "first_unaffected": [], "source": "CVE.org"}, {"vendor": "Microsoft", "product": "Windows Server, version 2004 (Server Core installation)", "ranges": ["unspecified"], "first_unaffected": [], "source": "CVE.org"}], "notes_kev": ["https://nvd.nist.gov/vuln/detail/CVE-2020-1350"]}, "consulted_at": "2026-10-08T12:31:07.489961+00:00"}