{"id":1295,"date":"2019-10-08T21:11:20","date_gmt":"2019-10-08T19:11:20","guid":{"rendered":"https:\/\/fr.koddos.net\/blog\/?p=1295"},"modified":"2019-10-08T21:11:28","modified_gmt":"2019-10-08T19:11:28","slug":"une-faille-qui-permet-lacces-a-distance-au-microphone-decouvert-sur-lapplication-signal","status":"publish","type":"post","link":"https:\/\/fr.koddos.net\/blog\/une-faille-qui-permet-lacces-a-distance-au-microphone-decouvert-sur-lapplication-signal\/","title":{"rendered":"UNE FAILLE QUI PERMET L&rsquo;ACC\u00c8S \u00c0 DISTANCE AU MICROPHONE D\u00c9COUVERT SUR L&rsquo;APPLICATION SIGNAL"},"content":{"rendered":"\n<p>Les\napplications ax\u00e9es sur la protection de la vie priv\u00e9e sont de plus en plus populaires\n\u00e0 mesure que les pr\u00e9occupations des utilisateurs concernant leurs donn\u00e9es\npersonnelles deviennent un probl\u00e8me de plus en plus important. De nombreuses\napplications de messagerie et de m\u00e9dias sociaux ont \u00e9t\u00e9 cr\u00e9\u00e9es avec un accent\nparticulier sur l&rsquo;offre de communications s\u00e9curis\u00e9es \u00e0 leurs utilisateurs.<\/p>\n\n\n\n<p>Telegram\net Signal sont quelques-unes des applications de cette cat\u00e9gorie. Une recherche\nGoogle pour les applications de messagerie s\u00e9curis\u00e9e vous m\u00e8nera probablement \u00e0\nl&rsquo;une de ces applications, et leur popularit\u00e9 a augment\u00e9 au cours des derni\u00e8res\nann\u00e9es.<\/p>\n\n\n\n<p>Cependant,\nune r\u00e9v\u00e9lation r\u00e9cente a montr\u00e9 que Signal pourrait ne pas \u00eatre aussi s\u00e9curis\u00e9\nque beaucoup voudraient le croire. De nombreux utilisateurs et entreprises\ns&rsquo;inqui\u00e8tent de la <strong><a href=\"https:\/\/koddos.net\/blog\/top-9-cybersecurity-tips-that-every-entrepreneur-needs-to-know\/\">cybers\u00e9curit\u00e9<\/a><\/strong>\net apprennent qu&rsquo;une application telle que Signal pr\u00e9sente une faille de taille\ntelle que celle que les chercheurs ont d\u00e9couverte, ce qui soul\u00e8vera des\ninqui\u00e9tudes \u00e0 tous les niveaux.<\/p>\n\n\n\n<p><strong>Des\nchercheurs d\u00e9couvrent des failles dans la fonction d&rsquo;appel de Signal<\/strong><\/p>\n\n\n\n<p>Des\nchercheurs du monde entier s\u2019efforcent sans cesse de d\u00e9couvrir les failles\n\u00e9ventuelles des syst\u00e8mes et applications utilis\u00e9s quotidiennement par les\nutilisateurs. Ces failles sont expos\u00e9es dans le but d&rsquo;am\u00e9liorer la s\u00e9curit\u00e9 sur\nces plateformes et de donner aux utilisateurs une image compl\u00e8te du type de\nrisque associ\u00e9 \u00e0 l&rsquo;utilisation de ces applications.<\/p>\n\n\n\n<p>Les\nentreprises qui ont cr\u00e9\u00e9 l&rsquo;application peuvent \u00e9galement utiliser les\ninformations recueillies par les chercheurs pour am\u00e9liorer leur produit et\nfournir \u00e0 leurs utilisateurs le meilleur service possible.<\/p>\n\n\n\n<p>Project\nZero de Google est l&rsquo;un de ces groupes de chercheurs qui ont \u00e9t\u00e9 mis en place\npour examiner diverses applications et d\u00e9couvrir les \u00e9ventuelles failles de\ncelles-ci. Le 29 septembre 2019, l&rsquo;\u00e9quipe a fait une <strong><a href=\"https:\/\/bugs.chromium.org\/p\/project-zero\/issues\/detail?id=1943\">d\u00e9couverte\nsurprenante<\/a><\/strong> \u00e0 propos de l&rsquo;application de messagerie Signal.<\/p>\n\n\n\n<p>Selon\nla d\u00e9couverte faite par l&rsquo;\u00e9quipe de <strong><a href=\"https:\/\/koddos.net\/blog\/lastpass-fixes-potentially-dangerous-flaw-that-could-leak-credentials-from-the-previous-site\/\">Project\nZero<\/a><\/strong>, les appels vers une application Signal peuvent \u00eatre\ntrait\u00e9s \u00e0 distance sans que le propri\u00e9taire de l&rsquo;application ne sache qu&rsquo;il a\nre\u00e7u un appel. Cela permettra \u00e0 la personne, d&rsquo;autre part, d&rsquo;\u00e9couter toute\nconversation que l&rsquo;autre personne a.<\/p>\n\n\n\n<figure class=\"wp-block-embed-twitter wp-block-embed is-type-rich is-provider-twitter\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"twitter-tweet\" data-width=\"550\" data-dnt=\"true\"><p lang=\"en\" dir=\"ltr\">Signal: Incoming call can be connected without user interaction <a href=\"https:\/\/t.co\/0sKc1ITHF8\">https:\/\/t.co\/0sKc1ITHF8<\/a><\/p>&mdash; Project Zero Bugs (@ProjectZeroBugs) <a href=\"https:\/\/twitter.com\/ProjectZeroBugs\/status\/1180210643258859520?ref_src=twsrc%5Etfw\">October 4, 2019<\/a><\/blockquote><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script>\n<\/div><\/figure>\n\n\n\n<p>Cette\nfaille dans l&rsquo;application de Signal est rendue possible par un processus appel\u00e9\n\u00abhandleCallConnected\u00bb sur le client Android de l&rsquo;application. C&rsquo;est le client\nqui est charg\u00e9 d&rsquo;informer un utilisateur qu&rsquo;il a accept\u00e9 l&rsquo;appel en envoyant un\nmessage d&rsquo;appel connect\u00e9.<\/p>\n\n\n\n<p>Un\nattaquant peut utiliser une version modifi\u00e9e du client pour passer un appel \u00e0\nvotre application et envoyer le message connect\u00e9 au t\u00e9l\u00e9phone avant que la\ncible de l&rsquo;attaque n&rsquo;ait \u00e9t\u00e9 avertie d&rsquo;un appel entrant. Lorsque l&rsquo;appel est\nachemin\u00e9, l&rsquo;appelant appuie sur le bouton silencieux du microphone et il r\u00e9pond\n\u00e0 l&rsquo;appel \u00e0 l&rsquo;insu de l&rsquo;autre personne.<\/p>\n\n\n\n<p>Le\nclient avec la m\u00eame fonction iOS avait un probl\u00e8me similaire, mais il a \u00e9t\u00e9\nr\u00e9solu par une erreur d&rsquo;interface utilisateur avant que la connexion puisse\n\u00eatre \u00e9tablie. Cette d\u00e9couverte constitue une pr\u00e9occupation majeure pour les utilisateurs\nAndroid de l&rsquo;application et les risques d&rsquo;atteinte \u00e0 la vie priv\u00e9e li\u00e9s \u00e0\nl&rsquo;utilisation de l&rsquo;application feront l&rsquo;objet d&rsquo;importantes inqui\u00e9tudes.<\/p>\n\n\n\n<p>Une\nfois l&rsquo;appel connect\u00e9, l&rsquo;appareil attaqu\u00e9 affichera l&rsquo;\u00e9cran d&rsquo;appel Signal\ncomme d&rsquo;habitude et si l&rsquo;utilisateur regarde son appareil au moment de\nl&rsquo;attaque, il pourra remarquer qu&rsquo;un appel est en cours.<\/p>\n\n\n\n<p>Cela\nsignifie que cette faille n&rsquo;est pas un d\u00e9clencheur de mode silencieux du\nmicrophone du t\u00e9l\u00e9phone et qu&rsquo;il peut \u00eatre arr\u00eat\u00e9 d\u00e8s que l&rsquo;on remarque qu&rsquo;un\nappel est connect\u00e9 sur son application Signal. Si l&rsquo;appareil se trouve dans un\nsac ou dans un endroit loin de l&rsquo;utilisateur, ce dernier ne sera pas en mesure\nsavoir que quelqu&rsquo;un d&rsquo;autre utilise leur t\u00e9l\u00e9phone pour les espionner.<\/p>\n\n\n\n<p>La\nr\u00e9ponse \u00e0 distance aux appels ne peut \u00eatre effectu\u00e9e que sur des appels audio\net ne fonctionne pas pour les appels vid\u00e9o. C&rsquo;est une consolation qui permet\naux utilisateurs de savoir que l&rsquo;attaquant ne peut pas utiliser l&rsquo;application\ncomme un flux d&rsquo;informations vid\u00e9o.<\/p>\n\n\n\n<figure class=\"wp-block-embed-twitter wp-block-embed is-type-rich is-provider-twitter\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"twitter-tweet\" data-width=\"550\" data-dnt=\"true\"><p lang=\"en\" dir=\"ltr\">Enable the microphone remotely without interaction in Signal \ud83d\ude2e <a href=\"https:\/\/t.co\/XMQLQdzQvr\">https:\/\/t.co\/XMQLQdzQvr<\/a><\/p>&mdash; Tavis Ormandy (@taviso) <a href=\"https:\/\/twitter.com\/taviso\/status\/1180212178067918848?ref_src=twsrc%5Etfw\">October 4, 2019<\/a><\/blockquote><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script>\n<\/div><\/figure>\n\n\n\n<p><strong>Impl\u00e9mentation\nde solutions au probl\u00e8me<\/strong><\/p>\n\n\n\n<p>Une\nfois la faille d\u00e9couverte par l\u2019\u00e9quipe de Project Zero, Signal a rapidement\nr\u00e9agi aux pr\u00e9occupations de ses clients. L\u2019\u00e9quipe de l\u2019application de\nmessagerie a assum\u00e9 la responsabilit\u00e9 de la faille de leur application et a\nassur\u00e9 aux clients qu\u2019elle s\u2019efforcerait de la r\u00e9soudre rapidement. La soci\u00e9t\u00e9\na corrig\u00e9 la faille sur son application Android avec une <strong><a href=\"https:\/\/play.google.com\/store\/apps\/details?id=org.thoughtcrime.securesms&amp;hl=en_IN\">mise\n\u00e0 jour de la version 4.47.7<\/a><\/strong> qui a \u00e9t\u00e9 imm\u00e9diatement disponible\npour les utilisateurs. Cette r\u00e9ponse a \u00e9t\u00e9 salu\u00e9e par de nombreux utilisateurs\nqui ont d\u00e9clar\u00e9 que la plupart des entreprises auraient ni\u00e9 l&rsquo;existence d&rsquo;une\ntelle faille dans leurs applications.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Les applications ax\u00e9es sur la protection de la vie priv\u00e9e sont de plus en plus populaires \u00e0 mesure que les pr\u00e9occupations des utilisateurs concernant leurs donn\u00e9es personnelles deviennent un probl\u00e8me de plus en plus important. De nombreuses applications de messagerie et de m\u00e9dias sociaux ont \u00e9t\u00e9 cr\u00e9\u00e9es avec un accent particulier sur l&rsquo;offre de communications &hellip; <a href=\"https:\/\/fr.koddos.net\/blog\/une-faille-qui-permet-lacces-a-distance-au-microphone-decouvert-sur-lapplication-signal\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">UNE FAILLE QUI PERMET L&rsquo;ACC\u00c8S \u00c0 DISTANCE AU MICROPHONE D\u00c9COUVERT SUR L&rsquo;APPLICATION SIGNAL<\/span><\/a><\/p>\n","protected":false},"author":5,"featured_media":1296,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[6],"tags":[],"class_list":["post-1295","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualite"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>UNE FAILLE QUI PERMET L&#039;ACC\u00c8S \u00c0 DISTANCE AU MICROPHONE D\u00c9COUVERT SUR L&#039;APPLICATION SIGNAL - Blog KoDDoS<\/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:\/\/fr.koddos.net\/blog\/une-faille-qui-permet-lacces-a-distance-au-microphone-decouvert-sur-lapplication-signal\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"UNE FAILLE QUI PERMET L&#039;ACC\u00c8S \u00c0 DISTANCE AU MICROPHONE D\u00c9COUVERT SUR L&#039;APPLICATION SIGNAL - Blog KoDDoS\" \/>\n<meta property=\"og:description\" content=\"Les applications ax\u00e9es sur la protection de la vie priv\u00e9e sont de plus en plus populaires \u00e0 mesure que les pr\u00e9occupations des utilisateurs concernant leurs donn\u00e9es personnelles deviennent un probl\u00e8me de plus en plus important. De nombreuses applications de messagerie et de m\u00e9dias sociaux ont \u00e9t\u00e9 cr\u00e9\u00e9es avec un accent particulier sur l&rsquo;offre de communications &hellip; Continue reading UNE FAILLE QUI PERMET L&rsquo;ACC\u00c8S \u00c0 DISTANCE AU MICROPHONE D\u00c9COUVERT SUR L&rsquo;APPLICATION SIGNAL\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fr.koddos.net\/blog\/une-faille-qui-permet-lacces-a-distance-au-microphone-decouvert-sur-lapplication-signal\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog KoDDoS\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/koddosCom\" \/>\n<meta property=\"article:published_time\" content=\"2019-10-08T19:11:20+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-10-08T19:11:28+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/i1.wp.com\/fr.koddos.net\/blog\/wp-content\/uploads\/2019\/10\/Hard-Drives-Linux-and-Windows-in-Danger-of-Crashing-via-Ultra-and-Sonic-Signals.jpg?fit=825%2C510&ssl=1\" \/>\n\t<meta property=\"og:image:width\" content=\"825\" \/>\n\t<meta property=\"og:image:height\" content=\"510\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"KoDDoS\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@koddoscom\" \/>\n<meta name=\"twitter:site\" content=\"@koddoscom\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"KoDDoS\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/fr.koddos.net\\\/blog\\\/une-faille-qui-permet-lacces-a-distance-au-microphone-decouvert-sur-lapplication-signal\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/fr.koddos.net\\\/blog\\\/une-faille-qui-permet-lacces-a-distance-au-microphone-decouvert-sur-lapplication-signal\\\/\"},\"author\":{\"name\":\"KoDDoS\",\"@id\":\"https:\\\/\\\/fr.koddos.net\\\/blog\\\/#\\\/schema\\\/person\\\/d22f7fb31dc4d117c9eb5c9cfe533f85\"},\"headline\":\"UNE FAILLE QUI PERMET L&rsquo;ACC\u00c8S \u00c0 DISTANCE AU MICROPHONE D\u00c9COUVERT SUR L&rsquo;APPLICATION SIGNAL\",\"datePublished\":\"2019-10-08T19:11:20+00:00\",\"dateModified\":\"2019-10-08T19:11:28+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/fr.koddos.net\\\/blog\\\/une-faille-qui-permet-lacces-a-distance-au-microphone-decouvert-sur-lapplication-signal\\\/\"},\"wordCount\":917,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/fr.koddos.net\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/fr.koddos.net\\\/blog\\\/une-faille-qui-permet-lacces-a-distance-au-microphone-decouvert-sur-lapplication-signal\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/i0.wp.com\\\/fr.koddos.net\\\/blog\\\/wp-content\\\/uploads\\\/2019\\\/10\\\/Hard-Drives-Linux-and-Windows-in-Danger-of-Crashing-via-Ultra-and-Sonic-Signals.jpg?fit=825%2C510&ssl=1\",\"articleSection\":[\"Actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/fr.koddos.net\\\/blog\\\/une-faille-qui-permet-lacces-a-distance-au-microphone-decouvert-sur-lapplication-signal\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/fr.koddos.net\\\/blog\\\/une-faille-qui-permet-lacces-a-distance-au-microphone-decouvert-sur-lapplication-signal\\\/\",\"url\":\"https:\\\/\\\/fr.koddos.net\\\/blog\\\/une-faille-qui-permet-lacces-a-distance-au-microphone-decouvert-sur-lapplication-signal\\\/\",\"name\":\"UNE FAILLE QUI PERMET L'ACC\u00c8S \u00c0 DISTANCE AU MICROPHONE D\u00c9COUVERT SUR L'APPLICATION SIGNAL - 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