{"id":27821,"date":"2025-07-07T16:45:21","date_gmt":"2025-07-07T14:45:21","guid":{"rendered":"https:\/\/perseus.de\/vulnerabilidades-criticas-en-citrix-netscaler\/"},"modified":"2026-03-31T07:22:02","modified_gmt":"2026-03-31T05:22:02","slug":"vulnerabilidades-criticas-en-citrix-netscaler","status":"publish","type":"post","link":"https:\/\/perseus.de\/es\/vulnerabilidades-criticas-en-citrix-netscaler\/","title":{"rendered":"Vulnerabilidades cr\u00edticas en 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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Vulnerabilidades cr\u00edticas en Citrix NetScaler \u2013 ataques activos observados<\/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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En las \u00faltimas semanas, se han descubierto varias vulnerabilidades graves de seguridad en <\/span>el ADC y Gateway de Citrix NetScaler<\/b><\/a>, algunas de ellas conocidas como <\/span>\u00abCitrixBleed 2\u00bb.<\/b> Aunque las vulnerabilidades ya han sido corregidas por el fabricante, los expertos las clasifican como <\/span>cr\u00edticas<\/b>.<\/span><\/p>

Investigadores en seguridad inform\u00e1tica informan <\/span>de ataques activos<\/b> en los que, entre otras cosas, las sesiones web existentes fueron comprometidas y se obtuvieron autenticaciones sin que los usuarios lo supieran, lo <\/span>que sugiere que la autenticaci\u00f3n activa multifactor tambi\u00e9n podr\u00eda ser eludida<\/b>.<\/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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\u00bfQu\u00e9 ha pasado?<\/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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Actualmente, CERT.at y numerosos proveedores de seguridad de correo electr\u00f3nico est\u00e1n experimentando un aumento de campa\u00f1as de phishing que utilizan archivos adjuntos en formato de Gr\u00e1ficos Vectoriales Escalables (SVG). Estos gr\u00e1ficos vectoriales contienen c\u00f3digo JavaScript incrustado que puede ejecutarse desde el navegador al abrirse. Los atacantes utilizan esto para cargar p\u00e1ginas de inicio de sesi\u00f3n falsas o instalar malware, con el objetivo de obtener datos de acceso. Los archivos SVG afectados a menudo se disfrazan de facturas, mensajes de voz o documentos a firmar. <\/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\tVulnerabilidades reportadas
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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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\u00bfQui\u00e9n est\u00e1 afectado?<\/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 y NetScaler Gateway 14.1 antes de 14.1-47.46 <\/span><\/li>
  • NetScaler ADC y NetScaler Gateway 13.1 antes de la versi\u00f3n 13.1-59.19 <\/span><\/li>
  • NetScaler ADC 13.1-FIPS y NDcPP antes de 13.1-37.236-FIPS y NDcPP <\/span><\/li>
  • NetScaler ADC 12.1-FIPS antes de 12.1-55.328-FIPS (no afectado por 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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    \u00bfC\u00f3mo puedo protegerme?<\/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. Instalar actualizaciones de seguridad (\u00a1urgentemente!)<\/b><\/p>

    Instala <\/span> inmediatamente los parches proporcionados por el fabricante:<\/span><\/b><\/p>

    • 14.1-47.46 o m\u00e1s reciente<\/span><\/li>
    • 13.1-59.19 o m\u00e1s reciente<\/span><\/li>
    • 13.1-37.236-FIPS\/NDcPP o m\u00e1s reciente<\/span><\/li><\/ul>


      <\/b><\/p>

      2. Comprueba la configuraci\u00f3n<\/b><\/p>

      • Permitir el acceso a la interfaz de gesti\u00f3n solo desde redes de confianza.<\/span><\/li>
      • Desactiva los servicios e interfaces innecesarios.<\/span><\/li><\/ul>

        <\/span><\/p>

        3. Sistemas de monitorizaci\u00f3n<\/b><\/p>

        • Activa el registro y la detecci\u00f3n de intrusiones.<\/span><\/li>
        • Monitoriza actividades sospechosas (por ejemplo, comportamientos inusuales en la sesi\u00f3n, accesos fallidos).<\/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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          \u00bfQu\u00e9 hace exactamente el ADC Netscaler de Citrix? <\/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> es un sistema que permite un acceso seguro, r\u00e1pido y fiable a aplicaciones web, incluso bajo cargas elevadas. Se utiliza ampliamente en empresas para el balanceo de carga, la optimizaci\u00f3n del rendimiento y la seguridad.<\/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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          Varias vulnerabilidades cr\u00edticas en Citrix NetScaler ADC y Gateway permiten a los atacantes tomar el control de sesiones web activas, a veces incluso salt\u00e1ndose la autenticaci\u00f3n multifactor. <\/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":[66],"tags":[],"class_list":["post-27821","post","type-post","status-publish","format-standard","hentry","category-advertencia-de-peligro"],"acf":[],"yoast_head":"\nVulnerabilidades cr\u00edticas en 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\/es\/vulnerabilidades-criticas-en-citrix-netscaler\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Vulnerabilidades cr\u00edticas en Citrix NetScaler - 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