{"id":247952,"date":"2022-01-17T08:00:28","date_gmt":"2022-01-17T07:00:28","guid":{"rendered":"https:\/\/www.stormshield.com\/?p=247952"},"modified":"2023-06-26T15:13:21","modified_gmt":"2023-06-26T14:13:21","slug":"cybersecurite-et-postes-de-travail-vers-une-stricte-limitation-aux-usages-professionnels","status":"publish","type":"post","link":"https:\/\/www.stormshield.com\/fr\/actus\/cybersecurite-et-postes-de-travail-vers-une-stricte-limitation-aux-usages-professionnels\/","title":{"rendered":"Cybers\u00e9curit\u00e9 et postes de travail : vers une stricte limitation aux usages professionnels&nbsp;?"},"content":{"rendered":"<p><strong>\u00c0 quelques exceptions pr\u00e8s, en particulier dans les secteurs les plus sensibles, l\u2019habitude est souvent prise d\u2019utiliser son poste de travail professionnel pour certains (si ce n\u2019est tous) usages personnels. D\u2019autant plus lorsqu\u2019il s\u2019agit d\u2019un poste portable. Or, ce sont ces postes qui constituent le vecteur le plus \u00ab\u00a0efficace\u00a0\u00bb des malveillances \u00e0 l\u2019encontre du SI des organisations. D\u00e8s lors, peut-on imaginer un monde aux usages num\u00e9riques professionnels et personnels strictement \u00e9tanches\u00a0?<\/strong><\/p>\n<p>&nbsp;<\/p>\n<h2>Postes de travail : une porte ouverte vers l\u2019ensemble du Syst\u00e8me d'Information<\/h2>\n<p>Par principe, les attaques malveillantes \u00e0 l\u2019encontre des entreprises ou administrations ont g\u00e9n\u00e9ralement deux objectifs, bien souvent coupl\u00e9s\u00a0: l\u2019argent et l\u2019information. Et dans tous les cas, elles sont men\u00e9es via des m\u00e9thodes industrielles, assurant efficacit\u00e9 et reproductibilit\u00e9 aux assaillants.\u00a0Parmi ces m\u00e9thodes, le piratage de r\u00e9seaux WiFi non prot\u00e9g\u00e9s est efficace mais il n\u00e9cessite un acc\u00e8s physique. Les attaques de serveurs mal prot\u00e9g\u00e9s peuvent cr\u00e9er des d\u00e9g\u00e2ts, mais ils restent souvent circonscrits \u00e0 leurs environnements applicatifs. Il est aussi possible de s\u2019attaquer au VPN SSL de l\u2019organisation lorsque celui-ci est vuln\u00e9rable. Mais rien n\u2019est comparable \u00e0 la r\u00e9ussite du ciblage utilisateurs, par mail (phishing) ou surf (<a href=\"https:\/\/www.stormshield.com\/fr\/actus\/poste-de-travail-immersion-dans-le-monde-des-comportements-suspects\/\">implantation de logiciels malveillants sur les postes<\/a> via des sites web corrompus).<\/p>\n<p>M\u00eame bien prot\u00e9g\u00e9, le poste utilisateur reste de loin le plus vuln\u00e9rable car, par d\u00e9finition, il est connect\u00e9 \u00e0 l\u2019Active Directory de l\u2019entreprise (l\u2019outil d\u2019annuaire le plus repr\u00e9sent\u00e9 sur le march\u00e9). Et cette solution, malgr\u00e9 l\u2019effort des d\u00e9veloppeurs, reste sujette \u00e0 de nombreuses vuln\u00e9rabilit\u00e9s permettant l\u2019acc\u00e8s distant et l\u2019\u00e9l\u00e9vation de privil\u00e8ges depuis un compte utilisateur. C\u2019est la porte ouverte au fameux \u00ab\u00a0Admin access\u00a0\u00bb et \u00e0 l\u2019ensemble des donn\u00e9es de l\u2019entreprise.<\/p>\n<p>&nbsp;<\/p>\n<h2>Une cybers\u00e9curit\u00e9 proactive et transparente pour l\u2019usager<\/h2>\n<p>Pour se pr\u00e9munir au maximum de ces risques, rien de plus simple <em>a priori<\/em> : en plus des logiciels de cybers\u00e9curit\u00e9 d\u00e9di\u00e9s, il suffirait <a href=\"https:\/\/www.stormshield.com\/fr\/actus\/pourquoi-les-mises-a-jour-sont-elles-un-probleme-dans-la-cybersecurite\/\">de maintenir ses postes de travail \u00e0 jour<\/a> pour \u00e9viter l\u2019exploitation de failles connues. Certes, mais c\u2019est encore sans compter sur les failles Zero-Day, sur lesquelles les cyberattaquants sont de plus en plus productifs. Pour contrer ces risques, la mise en \u0153uvre de solutions capables de bloquer des actions non habituelles des applications ou du syst\u00e8me demeure une pratique efficace, car proactive. Par essence en effet, les logiciels malveillants ont des comportements tr\u00e8s sp\u00e9cifiques, cherchant tout type d\u2019ouverture pour s\u2019introduire et modifier les syst\u00e8mes.<\/p>\n<p>Dans tous les cas en revanche, ces outils doivent \u00eatre le plus transparent possible pour l\u2019usager, afin qu\u2019il puisse accomplir sereinement ses t\u00e2ches quotidiennes et ne pas perdre en productivit\u00e9 du fait de blocages permanents. Ce qui ne doit en rien l\u2019emp\u00eacher de rester vigilant pour autant\u00a0!<\/p>\n<p>&nbsp;<\/p>\n<h2>Au-del\u00e0 des chartes d\u2019utilisation, vers un usage strictement professionnel des postes de travail\u00a0?<\/h2>\n<p>En dehors de quelques secteurs manipulant des donn\u00e9es sensibles o\u00f9 <a href=\"https:\/\/www.stormshield.com\/fr\/produits-et-services\/produits\/protection-des-postes-et-serveurs\/stormshield-endpoint-security\/\">les postes de travail<\/a> sont tr\u00e8s verrouill\u00e9s et limitent au strict minimum les usages, nombreux sont les utilisateurs \u00e0 se servir de leur poste de travail pour leurs usages personnels. Allant souvent m\u00eame jusqu\u2019\u00e0 autoriser leurs enfants \u00e0 s\u2019en servir, ou jouer en r\u00e9seau avec. Une situation sans doute encore exacerb\u00e9e avec l\u2019acc\u00e9l\u00e9ration du t\u00e9l\u00e9travail, quand ce n\u2019est pas l\u2019entreprise qui demande au collaborateur d\u2019utiliser sa machine personnelle pour ne pas avoir \u00e0 payer une machine professionnelle.\u00a0Si un certain nombre d\u2019organisations ont mis en place des chartes d\u2019usages et des outillages informatiques mis \u00e0 disposition de leurs collaborateurs, dans les faits, peu d\u2019entre elles appliquent des sanctions en cas de comportements imprudents, m\u00eame s\u2019il en r\u00e9sulte des situations particuli\u00e8rement graves pour l\u2019ensemble du syst\u00e8me d\u2019information (perte, vol de donn\u00e9es ou ransomwares, etc.).<\/p>\n<p>Avec le d\u00e9veloppement de l\u2019informatique domestique (smartphones, tablettes, PC, acc\u00e8s internet), associ\u00e9 \u00e0 des risques num\u00e9riques toujours plus importants pour les organisations, peut-\u00eatre est-il temps pour ces derni\u00e8res de limiter strictement aux usages professionnels les outils num\u00e9riques de l\u2019entreprise mis \u00e0 disposition de leurs collaborateurs.<\/p>\n<p>&nbsp;<\/p>\n<p>Dans ce cas, on parlerait d\u2019outils num\u00e9riques de service (uniquement \u00e0 usage professionnel) et non plus d\u2019outils num\u00e9riques de fonction (\u00e0 usage \u00ab\u00a0global\u00a0\u00bb du salari\u00e9). Cela ne r\u00e9soudra pas tous les probl\u00e8mes en mati\u00e8re de cybers\u00e9curit\u00e9, mais pourrait <em>a minima<\/em> contribuer \u00e0 cyber-responsabiliser les collaborateurs et ainsi \u00e0 l\u2019am\u00e9lioration des usages.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00c0 quelques exceptions pr\u00e8s, en particulier dans les secteurs les plus sensibles, l\u2019habitude est souvent prise d\u2019utiliser son poste de travail professionnel pour certains (si ce n\u2019est tous) usages personnels. D\u2019autant plus lorsqu\u2019il s\u2019agit d\u2019un poste portable. Or, ce sont ces postes qui constituent le&#8230;<\/p>\n","protected":false},"author":61,"featured_media":224562,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1608],"tags":[4368],"business_size":[],"industry":[],"help_mefind":[],"features":[],"type_security":[],"maintenance":[],"offer":[],"administration_tools":[],"cloud_offers":[],"listing_product":[1565],"class_list":["post-247952","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-paroles-experts","tag-la-cybersecurite-par-stormshield","listing_product-ses-fr"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Cybers\u00e9curit\u00e9 et postes de travail : vers une limitation des usages ?<\/title>\n<meta name=\"description\" content=\"Une tribune cybers\u00e9curit\u00e9 autour de la 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