{"id":27818,"date":"2025-07-07T16:45:21","date_gmt":"2025-07-07T14:45:21","guid":{"rendered":"https:\/\/perseus.de\/vulnerabilites-critiques-dans-citrix-netscaler\/"},"modified":"2026-03-31T07:21:43","modified_gmt":"2026-03-31T05:21:43","slug":"vulnerabilites-critiques-dans-citrix-netscaler","status":"publish","type":"post","link":"https:\/\/perseus.de\/fr\/vulnerabilites-critiques-dans-citrix-netscaler\/","title":{"rendered":"Vuln\u00e9rabilit\u00e9s critiques dans Citrix NetScaler"},"content":{"rendered":"\t\t
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07.07.2025<\/h6>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Vuln\u00e9rabilit\u00e9s critiques dans Citrix NetScaler \u2013 attaques actives observ\u00e9es<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Ces derni\u00e8res semaines, plusieurs vuln\u00e9rabilit\u00e9s de s\u00e9curit\u00e9 s\u00e9rieuses ont \u00e9t\u00e9 d\u00e9couvertes dans <\/span>l\u2019ADC et la passerelle Citrix NetScaler<\/b> <\/a>\u2013 certaines \u00e9tant connues sous le nom de <\/span>\u00ab CitrixBleed 2 \u00bb.<\/b> Bien que les vuln\u00e9rabilit\u00e9s aient d\u00e9j\u00e0 \u00e9t\u00e9 corrig\u00e9es par le fabricant, les experts les classent comme <\/span>critiques<\/b> .<\/span><\/p>

Les chercheurs en s\u00e9curit\u00e9 informatique rapportent <\/span>des attaques actives<\/b> dans lesquelles, entre autres, des sessions web existantes ont \u00e9t\u00e9 compromises et des authentifications obtenues \u00e0 l\u2019insu des utilisateurs \u2013 <\/span>ce qui sugg\u00e8re que l\u2019authentification active \u00e0 facteurs multiples pourrait \u00e9galement \u00eatre<\/b> contourn\u00e9e.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Que s\u2019est-il pass\u00e9 ?<\/b><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Actuellement, CERT.at et de nombreux fournisseurs de s\u00e9curit\u00e9 des e-mails constatent une augmentation des campagnes de phishing utilisant des pi\u00e8ces jointes aux emails au format Scalable Vector Graphics (SVG). Ces graphiques vectoriels contiennent du code JavaScript int\u00e9gr\u00e9 qui peut \u00eatre ex\u00e9cut\u00e9 depuis le navigateur lorsqu\u2019ils sont ouverts. Les attaquants utilisent cela pour charger de fausses pages de connexion ou installer des logiciels malveillants \u2013 dans le but de r\u00e9cup\u00e9rer les donn\u00e9es d\u2019acc\u00e8s. Les fichiers SVG concern\u00e9s se d\u00e9guisent souvent en factures, messages vocaux ou documents \u00e0 signer. <\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\n\t\t\t\t\t\t\t\t\tVuln\u00e9rabilit\u00e9s signal\u00e9es
(Source : <\/b>BSI)<\/b><\/a><\/b>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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\"\"<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Qui est concern\u00e9 ?<\/b><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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  • NetScaler ADC et NetScaler Gateway 14.1 avant 14.1-47.46 <\/span><\/li>
  • NetScaler ADC et NetScaler Gateway 13.1 avant 13.1-59.19 <\/span><\/li>
  • NetScaler ADC 13.1-FIPS et NDcPP avant 13.1-37.236-FIPS et NDcPP <\/span><\/li>
  • NetScaler ADC 12.1-FIPS avant 12.1-55.328-FIPS (non affect\u00e9 par CVE-2025-6543)<\/span><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    Comment puis-je me prot\u00e9ger ?<\/b><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    1. Installer des mises \u00e0 jour de s\u00e9curit\u00e9 (en urgence !)<\/b><\/p>

    Installez <\/span> imm\u00e9diatement les correctifs fournis par le fabricant :<\/span><\/b><\/p>

    • 14.1-47.46 ou plus r\u00e9cente<\/span><\/li>
    • 13.1-59.19 ou plus r\u00e9cente<\/span><\/li>
    • 13.1-37.236-FIPS\/NDcPP ou plus r\u00e9cent<\/span><\/li><\/ul>


      <\/b><\/p>

      2. V\u00e9rifiez la configuration<\/b><\/p>

      • N\u2019autoriser l\u2019acc\u00e8s \u00e0 l\u2019interface de gestion que depuis des r\u00e9seaux de confiance.<\/span><\/li>
      • D\u00e9sactivez les services et interfaces inutiles.<\/span><\/li><\/ul>

        <\/span><\/p>

        3. Surveillance des syst\u00e8mes<\/b><\/p>

        • Activez la journalisation et la d\u00e9tection d\u2019intrusion.<\/span><\/li>
        • Surveillez toute activit\u00e9 suspecte (par exemple, comportement inhabituel de session, \u00e9checs de connexions).<\/span><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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          Que fait exactement le Citrix Netscaler ADC ? <\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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          Citrix NetScaler ADC (Application Delivery Controller)<\/b> est un syst\u00e8me qui permet un acc\u00e8s s\u00e9curis\u00e9, rapide et fiable aux applications web \u2013 m\u00eame sous fortes charges. Il est largement utilis\u00e9 dans les entreprises pour l\u2019\u00e9quilibrage de charge, l\u2019optimisation des performances et la s\u00e9curit\u00e9.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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          \n\t\t\t\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

          Plusieurs vuln\u00e9rabilit\u00e9s critiques dans Citrix NetScaler ADC et Gateway permettent aux attaquants de prendre le contr\u00f4le des sessions web actives, parfois m\u00eame en contournant l\u2019authentification multi-facteurs. <\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[65],"tags":[],"class_list":["post-27818","post","type-post","status-publish","format-standard","hentry","category-alerte-aux-dangers"],"acf":[],"yoast_head":"\nVuln\u00e9rabilit\u00e9s critiques dans Citrix NetScaler - Perseus Technologies<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/perseus.de\/fr\/vulnerabilites-critiques-dans-citrix-netscaler\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Vuln\u00e9rabilit\u00e9s critiques dans Citrix NetScaler - 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