{"id":5142,"date":"2014-02-25T18:35:38","date_gmt":"2014-02-25T17:35:38","guid":{"rendered":"http:\/\/www.solucominsight.fr\/?p=5142"},"modified":"2019-12-31T11:17:50","modified_gmt":"2019-12-31T10:17:50","slug":"que-devient-la-securite-de-windows-xp-apres-la-fin-de-son-support","status":"publish","type":"post","link":"https:\/\/www.riskinsight-wavestone.com\/en\/2014\/02\/que-devient-la-securite-de-windows-xp-apres-la-fin-de-son-support\/","title":{"rendered":"Que devient la s\u00e9curit\u00e9 de Windows XP apr\u00e8s la fin de son support ?"},"content":{"rendered":"

Apr\u00e8s 12 ans de bons et loyaux services, Windows XP tire sa r\u00e9v\u00e9rence. Arriv\u00e9 en fin de support en 2009, il \u00e9tait jusqu\u2019ici possible de continuer \u00e0 recevoir les mises \u00e0 jour gr\u00e2ce au \u00ab\u00a0support \u00e9tendu\u00a0\u00bb de Microsoft, un abonnement optionnel auquel la majorit\u00e9 des entreprises avaient souscrit. \u00c0 partir du 8 avril 2014, Microsoft ne diffusera plus de mises \u00e0 jour, m\u00eame avec ce support \u00e9tendu. Un support \u00ab\u00a0personnalis\u00e9\u00a0\u00bb\u00a0 sera possible mais \u00e0 un prix tr\u00e8s dissuasif. Quelles sont alors les solutions pour les entreprises\u00a0?<\/p>\n

Tr\u00e8s largement d\u00e9ploy\u00e9 dans le monde – Gartner parle de plus de 1,6 milliards de machines depuis son lancement en 2001, dont quelques 500 millions encore en activit\u00e9 – \u00a0l\u2019OS \u00e9quipe encore de nombreux postes de travail en entreprise. D\u00e8s lors, il est important de comprendre les enjeux de cette fin de support, et les diff\u00e9rentes approches pour y faire face.<\/p>\n

Quels sont les syst\u00e8mes concern\u00e9s et les cons\u00e9quences de cette fin de support\u00a0?<\/h2>\n

Comme le montre l\u2019illustration ci-dessous, le syst\u00e8me concern\u00e9 par cette date butoir est Windows XP dans sa version pour PC. . Notons que la version Embedded <\/em>(pour syst\u00e8mes embarqu\u00e9s), qui \u00e9quipe par exemple certains distributeurs automatiques de billets<\/a>, b\u00e9n\u00e9ficiera elle des correctifs jusqu\u2019en janvier 2016.<\/p>\n

\"\"<\/p>\n

Au-del\u00e0 de l\u2019arr\u00eat des mises \u00e0 jour fonctionnelles, l\u2019arr\u00eat des mises \u00e0 jour de Windows XP signifie la fin des patches de s\u00e9curit\u00e9\u00a0: lorsqu\u2019une nouvelle faille sera d\u00e9tect\u00e9e, elle aura les m\u00eames impacts qu\u2019une vuln\u00e9rabilit\u00e9 0-day<\/a>. Elle sera donc imm\u00e9diatement exploitable pour des actions malveillantes, et ne sera pas corrig\u00e9e.<\/p>\n

Microsoft a cependant annonc\u00e9 r\u00e9cemment que certains produits sp\u00e9cifiques de s\u00e9curit\u00e9 pour Windows XP (tels que MSRT, l\u2019outil de suppression des programmes malveillants) continueraient, eux, \u00e0 recevoir des mises \u00e0 jour de d\u00e9finition antivirales jusqu\u2019en juillet 2015<\/a>.<\/p>\n

Du point de vue de la gestion des risques et de la s\u00e9curit\u00e9, on peut redouter deux impacts majeurs.<\/p>\n

En termes de protection, \u00a0les postes sous Windows XP, d\u00e9j\u00e0 souvent critiqu\u00e9s pour leur pi\u00e8tre niveau de s\u00e9curit\u00e9, deviendront de r\u00e9els points de faiblesse<\/strong> dans la dur\u00e9e. M\u00eame en faible nombre, ils pourront facilement servir de porte d\u2019entr\u00e9e <\/strong>et de point de rebond pour une attaque plus large<\/strong>.<\/p>\n

La plupart des \u00e9diteurs d\u2019antivirus arr\u00eateront d\u2019ailleurs de fournir un support pour leurs versions sous Windows XP lorsque cela deviendra techniquement (et commercialement) d\u00e9raisonnable, contribuant \u00e0 augmenter m\u00e9caniquement la vuln\u00e9rabilit\u00e9 de ces postes.<\/p>\n

Dans le m\u00eame temps, les entreprises vont se trouver face \u00e0 un risque de perte de conformit\u00e9<\/strong>. En effet, certains standards exigent l\u2019utilisation de syst\u00e8mes support\u00e9s par leur \u00e9diteur. Ainsi, il semblerait que les postes sous Windows XP apr\u00e8s le 8 avril 2014 fassent perdre la conformit\u00e9 HIPAA (donn\u00e9es de sant\u00e9 am\u00e9ricaines). Pour l\u2019industrie bancaire, le risque de perte d\u2019une certification PCI-DSS appara\u00eetra \u00e9galement<\/strong>, la norme exigeant une correction des vuln\u00e9rabilit\u00e9s critiques impossible dans les faits.<\/p>\n

Comment les entreprises peuvent-elle g\u00e9rer ces risques\u00a0?<\/h2>\n

Pour se parer au mieux \u00e0 toute \u00e9ventualit\u00e9 apr\u00e8s le 8 avril, plusieurs approches peuvent \u00eatre adopt\u00e9es.<\/p>\n

1)\u00a0\u00a0\u00a0\u00a0 La mont\u00e9e de version, solution \u00e9vidente mais \u00e0 long terme<\/h4>\n

C\u2019est la solution la plus \u00e9vidente et, bien s\u00fbr, la plus recommand\u00e9e par Microsoft. L\u2019\u00e9diteur pr\u00e9conise le d\u00e9ploiement de Windows 8.1 Pro, l\u00e0 o\u00f9 beaucoup d\u2019entreprises tentent actuellement de terminer (voire de commencer) leur passage \u00e0\u2026 Windows 7.<\/p>\n

La migration vers un OS moderne est l\u2019approche id\u00e9ale, mais les retards de migration sont souvent dus \u00e0 la complexit\u00e9 de portage d\u2019applications historiques, \u00e0 l\u2019obligation de continuer \u00e0 utiliser Windows XP car il est le seul OS support\u00e9 par une application m\u00e9tier critique, voire \u00e0 la limitation d\u2019un mat\u00e9riel pas assez puissant pour une version plus r\u00e9cente.<\/p>\n

Cette situation n\u2019a pas toujours \u00e9t\u00e9 anticip\u00e9e, et il est certain que des postes resteront encore sous XP pendant plusieurs mois, voire plusieurs ann\u00e9es.<\/p>\n

\u00a02) La (co\u00fbteuse) botte secr\u00e8te Microsoft\u00a0: le custom support<\/em><\/h4>\n

Si le \u00ab\u00a0support \u00e9tendu\u00a0\u00bb de Microsoft s\u2019arr\u00eate, l\u2019\u00e9diteur propose toutefois une alternative, \u00e0 travers son Custom Support Agreement, <\/em>ou support personnalis\u00e9<\/a>.<\/p>\n

Il s\u2019agit d\u2019un contrat compl\u00e9mentaire, accessible uniquement aux grands comptes, et factur\u00e9 au nombre de postes que l\u2019on souhaite continuer \u00e0 couvrir. Les chiffres qui circulent publiquement sont de l\u2019ordre de 200$ par poste pour la premi\u00e8re ann\u00e9e de support, 400$ la deuxi\u00e8me, et ainsi de suite\u2026<\/p>\n

L\u2019objectif est ici d\u2019offrir une porte de secours aux grandes entreprises qui n\u2019ont pas encore migr\u00e9 des syst\u00e8mes critiques, tout en les poussant \u00e0 le faire rapidement en rendant le co\u00fbt de support de plus en plus \u00e9lev\u00e9.<\/p>\n

\u00a03) Les solutions d\u00e9di\u00e9es pour s\u00e9curiser les postes sous XP<\/h4>\n

Plusieurs mesures de protection sp\u00e9cifiques peuvent, enfin, \u00eatre mises en \u0153uvre.<\/p>\n

    \n
  • \u00a0Figer le syst\u00e8me dans une approche liste blanche<\/strong><\/li>\n<\/ul>\n

    Il est possible de figer les syst\u00e8mes obsol\u00e8tes, comme cela a parfois d\u00e9j\u00e0 \u00e9t\u00e9 fait avec les pr\u00e9d\u00e9cesseurs de\u00a0 Windows XP. Certains outils du march\u00e9, tel qu\u2019Integrity Control de McAfee, permettent en effet de limiter la liste des ex\u00e9cutables autoris\u00e9s sur un poste donn\u00e9, v\u00e9rifiant ainsi que seuls des logiciels approuv\u00e9s et non modifi\u00e9s sont utilis\u00e9s.<\/p>\n

    Si cette m\u00e9thode peut s\u2019av\u00e9rer efficace pour les postes m\u00e9tier ou de production industrielle subissant peu de changements, elle montrera vite ses limites avec des postes de travail bureautiques.<\/p>\n

      \n
    • \u00a0D\u00e9ployer des solutions sp\u00e9cifiques de r\u00e9duction du risque<\/strong><\/li>\n<\/ul>\n

      Certains \u00e9diteurs offrent des solutions cibl\u00e9es, \u00e0 l\u2019instar d\u2019Arkoon avec sa solution ExtendedXP. Dans ce cas, il s\u2019agit alors de cumuler un service de veille d\u00e9di\u00e9 aux failles touchant l\u2019OS, et un outil de d\u00e9tection d\u2019intrusion (HIPS) sur les postes de travail concern\u00e9s, afin de r\u00e9agir en temps r\u00e9el \u00e0 toute nouvelle vuln\u00e9rabilit\u00e9, d\u2019adapter les r\u00e8gles de d\u00e9tection de l\u2019outil, et de r\u00e9duire ainsi le risque de compromission ou d\u2019attaque.<\/p>\n

        \n
      • \u00a0Se pr\u00e9parer \u00e0 l\u2019\u00e9ventualit\u00e9 d\u2019une crise\u2026 en attendant la migration <\/strong><\/li>\n<\/ul>\n

        Quelle que soit l\u2019approche retenue, couvrir le risque tout en conservant des postes sous Windows XP sera difficile. Il peut donc \u00eatre utile d\u2019anticiper une gestion de crise, en int\u00e9grant ce cas sp\u00e9cifique aux processus existants : pr\u00e9vention aupr\u00e8s des utilisateurs et du Helpdesk, alerte des \u00e9quipes IT, et formalisation d\u2019une cha\u00eene d\u2019escalade adapt\u00e9e.<\/p>\n

        Ces \u00e9tapes sont d\u00e9j\u00e0 en cours chez nombre de nos clients. M\u00eame si elles peuvent repr\u00e9senter des solutions d\u2019attente, la migration est aujourd\u2019hui plus que n\u00e9cessaire\u00a0!<\/p>\n","protected":false},"excerpt":{"rendered":"

        Apr\u00e8s 12 ans de bons et loyaux services, Windows XP tire sa r\u00e9v\u00e9rence. Arriv\u00e9 en fin de support en 2009, il \u00e9tait jusqu\u2019ici possible de continuer \u00e0 recevoir les mises \u00e0 jour gr\u00e2ce au \u00ab\u00a0support \u00e9tendu\u00a0\u00bb de Microsoft, un abonnement…<\/p>\n","protected":false},"author":13,"featured_media":4886,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"page-templates\/tmpl-one.php","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[3223,36,35],"tags":[244,141,3302,1253],"coauthors":[801],"class_list":["post-5142","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cloud-next-gen-it-security","category-cybersecurity-digital-trust","category-strategie-projets-it","tag-crise","tag-poste-de-travail","tag-security-architecture","tag-windows-xp"],"acf":[],"yoast_head":"\nQue devient la s\u00e9curit\u00e9 de Windows XP apr\u00e8s la fin de son support ? - SolucomINSIGHT<\/title>\n<meta name=\"description\" content=\"Apr\u00e8s 12 ans de bons et loyaux services, Windows XP tire sa r\u00e9v\u00e9rence. Arriv\u00e9 en fin de support en 2009, il \u00e9tait jusqu\u2019ici possible de continuer \u00e0 recevoir les mises \u00e0 jour gr\u00e2ce au \u00ab support \u00e9tendu \u00bb de Microsoft, un abonnement optionnel auquel la majorit\u00e9 des entreprises avaient souscrit. \u00c0 partir du 8 avril 2014, Microsoft ne diffusera plus de mises \u00e0 jour, m\u00eame avec ce support \u00e9tendu. Un support \u00ab personnalis\u00e9 \u00bb sera possible mais \u00e0 un prix tr\u00e8s dissuasif. Quelles sont alors les solutions pour les entreprises ?\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.riskinsight-wavestone.com\/2014\/02\/que-devient-la-securite-de-windows-xp-apres-la-fin-de-son-support\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Que devient la s\u00e9curit\u00e9 de Windows XP apr\u00e8s la fin de son support ? - SolucomINSIGHT\" \/>\n<meta property=\"og:description\" content=\"Apr\u00e8s 12 ans de bons et loyaux services, Windows XP tire sa r\u00e9v\u00e9rence. Arriv\u00e9 en fin de support en 2009, il \u00e9tait jusqu\u2019ici possible de continuer \u00e0 recevoir les mises \u00e0 jour gr\u00e2ce au \u00ab support \u00e9tendu \u00bb de Microsoft, un abonnement optionnel auquel la majorit\u00e9 des entreprises avaient souscrit. \u00c0 partir du 8 avril 2014, Microsoft ne diffusera plus de mises \u00e0 jour, m\u00eame avec ce support \u00e9tendu. Un support \u00ab personnalis\u00e9 \u00bb sera possible mais \u00e0 un prix tr\u00e8s dissuasif. Quelles sont alors les solutions pour les entreprises ?\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.riskinsight-wavestone.com\/2014\/02\/que-devient-la-securite-de-windows-xp-apres-la-fin-de-son-support\/\" \/>\n<meta property=\"og:site_name\" content=\"RiskInsight\" \/>\n<meta property=\"article:published_time\" content=\"2014-02-25T17:35:38+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-12-31T10:17:50+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2014\/01\/Fotolia_54227657_Subscription_Monthly_XXL-e1417689110988.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1900\" \/>\n\t<meta property=\"og:image:height\" content=\"1845\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Chadi Hantouche\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Chadi Hantouche\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/2014\/02\/que-devient-la-securite-de-windows-xp-apres-la-fin-de-son-support\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/2014\/02\/que-devient-la-securite-de-windows-xp-apres-la-fin-de-son-support\/\"},\"author\":{\"name\":\"Chadi Hantouche\",\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/en\/#\/schema\/person\/f79d84b363b7e5b8090ca3839d396efc\"},\"headline\":\"Que devient la s\u00e9curit\u00e9 de Windows XP apr\u00e8s la fin de son support ?\",\"datePublished\":\"2014-02-25T17:35:38+00:00\",\"dateModified\":\"2019-12-31T10:17:50+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/2014\/02\/que-devient-la-securite-de-windows-xp-apres-la-fin-de-son-support\/\"},\"wordCount\":1160,\"publisher\":{\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/en\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/2014\/02\/que-devient-la-securite-de-windows-xp-apres-la-fin-de-son-support\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2014\/01\/Fotolia_54227657_Subscription_Monthly_XXL-e1417689110988.jpg\",\"keywords\":[\"crise\",\"poste de travail\",\"security architecture\",\"Windows XP\"],\"articleSection\":[\"Cloud & Next-Gen IT Security\",\"Cybersecurity & Digital Trust\",\"M\u00e9tiers - Strat\u00e9gie & projets IT\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/2014\/02\/que-devient-la-securite-de-windows-xp-apres-la-fin-de-son-support\/\",\"url\":\"https:\/\/www.riskinsight-wavestone.com\/2014\/02\/que-devient-la-securite-de-windows-xp-apres-la-fin-de-son-support\/\",\"name\":\"Que devient la s\u00e9curit\u00e9 de Windows XP apr\u00e8s la fin de son support ? - SolucomINSIGHT\",\"isPartOf\":{\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/en\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/2014\/02\/que-devient-la-securite-de-windows-xp-apres-la-fin-de-son-support\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/2014\/02\/que-devient-la-securite-de-windows-xp-apres-la-fin-de-son-support\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2014\/01\/Fotolia_54227657_Subscription_Monthly_XXL-e1417689110988.jpg\",\"datePublished\":\"2014-02-25T17:35:38+00:00\",\"dateModified\":\"2019-12-31T10:17:50+00:00\",\"description\":\"Apr\u00e8s 12 ans de bons et loyaux services, Windows XP tire sa r\u00e9v\u00e9rence. 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