{"id":9212,"date":"2024-08-26T15:52:00","date_gmt":"2024-08-26T13:52:00","guid":{"rendered":"https:\/\/cryptrz.org\/wordpress\/?p=9212"},"modified":"2025-05-14T05:48:21","modified_gmt":"2025-05-14T03:48:21","slug":"le-docker-hacking-en-pratique","status":"publish","type":"post","link":"https:\/\/cryptrz.org\/wordpress\/2024\/08\/26\/le-docker-hacking-en-pratique\/","title":{"rendered":"Le Docker Hacking en pratique"},"content":{"rendered":"\n<p>Depuis 2013,\u00a0<a href=\"https:\/\/www.docker.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">Docker<\/a>\u00a0a chang\u00e9 la donne dans diff\u00e9rents secteurs de l&rsquo;informatique \u00e0 plusieurs \u00e9gards, en offrant aux d\u00e9veloppeurs et aux utilisateurs une grande flexibilit\u00e9 dans le d\u00e9veloppement et l&rsquo;utilisation de nombreuses applications et syst\u00e8mes d&rsquo;exploitation.<\/p>\n\n\n\n<p>Tout d&rsquo;abord, les conteneurs Docker assurent l&rsquo;isolation et la portabilit\u00e9 des applications logicielles. En encapsulant une application et ses d\u00e9pendances dans un conteneur, les d\u00e9veloppeurs peuvent garantir un comportement coh\u00e9rent dans diff\u00e9rents environnements. Cela \u00e9limine le fameux probl\u00e8me du \u00ab \u00e7a marche sur ma machine \u00bb et rationalise le processus de d\u00e9ploiement.<\/p>\n\n\n\n<p>Deuxi\u00e8mement, Docker permet de d\u00e9ployer des conteneurs dans des grappes, g\u00e9r\u00e9es par des frameworks tels que Kubernetes de Google. Cette approche permet de s\u00e9parer le code de l&rsquo;application et l&rsquo;infrastructure, ce qui facilite les architectures hautement r\u00e9silientes et \u00e9lastiques. La mise en cluster des conteneurs est particuli\u00e8rement b\u00e9n\u00e9fique pour les applications bas\u00e9es sur les microservices, car elle favorise l&rsquo;\u00e9volutivit\u00e9 et la tol\u00e9rance aux pannes.<\/p>\n\n\n\n<p>Enfin, les conteneurs Docker offrent une couche d&rsquo;abstraction sup\u00e9rieure pour le d\u00e9ploiement des applications. Ils simplifient le processus de configuration, de sauvegarde et de partage des environnements de serveurs. Avec Docker, l&rsquo;installation d&rsquo;une application ou d&rsquo;un grand logiciel peut \u00eatre aussi simple que l&rsquo;ex\u00e9cution de quelques commandes. Cette facilit\u00e9 d&rsquo;utilisation am\u00e9liore la productivit\u00e9 et acc\u00e9l\u00e8re les cycles de d\u00e9veloppement.<\/p>\n\n\n\n<p>Bien que Docker ait gagn\u00e9 en popularit\u00e9 ces derni\u00e8res ann\u00e9es, il introduit une certaine complexit\u00e9 dans le processus de d\u00e9veloppement, mais aussi quelques faiblesses si vous activez l&rsquo;acc\u00e8s \u00e0 distance et l&rsquo;utilisez avec les param\u00e8tres par d\u00e9faut. Un attaquant peut alors \u00eatre root en une seconde, comme nous le verrons ci-dessous.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"remote-access-for-docker-daemon\">Acc\u00e8s \u00e0 distance du daemon Docker<\/h1>\n\n\n\n<p>Si vous souhaitez travailler \u00e0 distance sur un conteneur, il est possible de configurer Docker pour qu&rsquo;il accepte les requ\u00eates d&rsquo;un h\u00f4te distant comme expliqu\u00e9 sur <a href=\"https:\/\/docs.docker.com\/engine\/security\/protect-access\/\">cette page de la documentation Docker<\/a>. M\u00eame si la documentation explique comment prot\u00e9ger Docker en cr\u00e9ant un<a href=\"https:\/\/docs.docker.com\/engine\/install\/linux-postinstall\/#manage-docker-as-a-non-root-user\" data-type=\"link\" data-id=\"https:\/\/docs.docker.com\/engine\/install\/linux-postinstall\/#manage-docker-as-a-non-root-user\"> utilisateur non-root<\/a> ou en<a href=\"https:\/\/docs.docker.com\/engine\/security\/protect-access\/\" data-type=\"link\" data-id=\"https:\/\/docs.docker.com\/engine\/security\/protect-access\/\"> prot\u00e9geant le daemon socket<\/a> par exemple, beaucoup de conteneurs accessibles \u00e0 distance sont utilis\u00e9s avec la configuration par d\u00e9faut, accessible sur le port 2375, mais aussi sur le port 2376 pour TLS en utilisant un compte root.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"find-these-containers-on-shodan\"><strong>Comment trouver ces containers sur Shodan<\/strong><\/h1>\n\n\n\n<p>En recherchant <code>product:docker port:2375<\/code> sur <a href=\"https:\/\/shodan.io\/\" data-type=\"link\" data-id=\"https:\/\/shodan.io\/\">Shodan<\/a>, on constate que de nombreux serveurs h\u00e9bergeant des conteneurs ont le port 2375 ouvert.<\/p>\n\n\n\n<figure class=\"wp-block-image is-style-default\"><a href=\"https:\/\/cryptrz.github.io\/assets\/images\/2023-09-19-docker-hacking\/shodan-results.png\"><img loading=\"lazy\" decoding=\"async\" width=\"411\" height=\"472\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/shodan-short-results-docker-port-2375.png\" alt=\"Shodan results showing Docker containers with port 2375 open and countries in the top 5 \" class=\"wp-image-51\" title=\"Shodan results for docker port 2375\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/shodan-short-results-docker-port-2375.png 411w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/shodan-short-results-docker-port-2375-261x300.png 261w\" sizes=\"auto, (max-width: 411px) 100vw, 411px\" \/><\/a><\/figure>\n\n\n\n<p>Comme les comptes gratuits de Shodan fournissent des r\u00e9sultats limit\u00e9s (2 pages), vous pouvez augmenter le nombre de r\u00e9sultats disponibles en filtrant et en sp\u00e9cifiant alternativement diff\u00e9rents pays en ajoutant country=XX o\u00f9 XX repr\u00e9sente le code du pays : \u00ab\u00a0<code>country=US<\/code>\u00a0\u00bb pour les \u00c9tats-Unis, \u00ab\u00a0<code>country=UK<\/code>\u00a0\u00bb pour le Royaume-Uni, <code>\"country=CN<\/code>\u00a0\u00bb pour la Chine, etc\u2026 Liste compl\u00e8te sur <a href=\"https:\/\/www.iso.org\/obp\/ui\/#search\" data-type=\"link\" data-id=\"https:\/\/www.iso.org\/obp\/ui\/#search\">iso.org<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/cryptrz.github.io\/assets\/images\/2023-09-19-docker-hacking\/shodan-search.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1184\" height=\"982\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/shodan-short-results-docker-port-2375-and-technical-details.png\" alt=\"Shodan results showing Docker containers with 2375 port open and some detail for a few servers. The first one in highlighted in a red rectangle, it will be the target in this post\" class=\"wp-image-55\" title=\"More detailed Shodan results for Docker port 2375\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/shodan-short-results-docker-port-2375-and-technical-details.png 1184w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/shodan-short-results-docker-port-2375-and-technical-details-300x249.png 300w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/shodan-short-results-docker-port-2375-and-technical-details-1024x849.png 1024w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/shodan-short-results-docker-port-2375-and-technical-details-768x637.png 768w\" sizes=\"auto, (max-width: 1184px) 100vw, 1184px\" \/><\/a><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"analyse-the-server-before-attacking-optional\"><strong>Analyser le serveur avant d&rsquo;attaquer (Optionnel)<\/strong><\/h1>\n\n\n\n<p>When you use Docker remotely, you can use the usual options listed on&nbsp;<a href=\"https:\/\/docs.docker.com\/engine\/reference\/commandline\/dockerd\/\" target=\"_blank\" rel=\"noreferrer noopener\">this page<\/a>. The difference is you need to spocify the host with the \u201c<code>-H<\/code>\u201d parameter. We will check first the&nbsp;<strong>Docker<\/strong>&nbsp;version installed by using the \u201c<code>--version<\/code>\u201d option on the first server listed on Shodan in the previous section. Then, we can list&nbsp;<strong>all images<\/strong>&nbsp;installed and available with the&nbsp;<code>images<\/code>&nbsp;parameter.<\/p>\n\n\n\n<p>Lorsque vous utilisez Docker \u00e0 distance, vous pouvez utiliser les options habituelles list\u00e9es sur <a href=\"https:\/\/docs.docker.com\/engine\/reference\/commandline\/dockerd\/\" data-type=\"link\" data-id=\"https:\/\/docs.docker.com\/engine\/reference\/commandline\/dockerd\/\">cette page<\/a>. La diff\u00e9rence est que vous devez sp\u00e9cifier l&rsquo;h\u00f4te avec le param\u00e8tre \u00ab -H \u00bb. Nous allons d&rsquo;abord v\u00e9rifier la version de Docker install\u00e9e en utilisant l&rsquo;option \u00ab\u00a0<code>--version<\/code>\u00a0\u00bb sur le premier serveur list\u00e9 sur Shodan dans la section pr\u00e9c\u00e9dente. Ensuite, nous pouvons lister toutes les images install\u00e9es et disponibles avec le param\u00e8tre <code>images<\/code>.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/cryptrz.github.io\/assets\/images\/2023-09-19-docker-hacking\/docker-version-images.png\"><img loading=\"lazy\" decoding=\"async\" width=\"645\" height=\"273\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-7.png\" alt=\"Linux ternimal showing the Docker version and images available on the target selected in the previous step\" class=\"wp-image-56\" title=\"Docker version and images on the chosen victim\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-7.png 645w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-7-300x127.png 300w\" sizes=\"auto, (max-width: 645px) 100vw, 645px\" \/><\/a><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"launch-the-attack\"><strong>Lancer l&rsquo;attaque<\/strong><\/h1>\n\n\n\n<p>For listing every process actually running, you will use the \u201c<code>ps<\/code>\u201d parameter. You can see the operating system running on the container, its&nbsp;<strong>uptime<\/strong>,&nbsp;<strong>size<\/strong>, and espacially its&nbsp;<strong>image ID<\/strong>&nbsp;which we will use.<\/p>\n\n\n\n<p>Pour obtenir la liste de tous les processus en cours d&rsquo;ex\u00e9cution, vous utiliserez le param\u00e8tre \u00ab\u00a0<code>ps<\/code>\u00ab\u00a0. Vous pouvez voir le syst\u00e8me d&rsquo;exploitation en cours d&rsquo;ex\u00e9cution sur le conteneur, son <strong>temps de fonctionnement<\/strong>, sa <strong>taille<\/strong>, et en particulier son <strong>image ID<\/strong> que nous allons utiliser.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/cryptrz.github.io\/assets\/images\/2023-09-19-docker-hacking\/docker-ps.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1089\" height=\"446\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-4.png\" alt=\"Linux terminal showing process list on the selected Docker container using the ps command\" class=\"wp-image-53\" title=\"Processes running on the selected Docker container\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-4.png 1089w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-4-300x123.png 300w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-4-1024x419.png 1024w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-4-768x315.png 768w\" sizes=\"auto, (max-width: 1089px) 100vw, 1089px\" \/><\/a><\/figure>\n\n\n\n<p>Essayons le premier, sous <a href=\"https:\/\/www.ubuntu-fr.org\/\" data-type=\"link\" data-id=\"https:\/\/ubuntu.com\/\">Ubuntu<\/a>. Apr\u00e8s <code>docker -H IP_ADDRESS<\/code>, nous pouvons s\u00e9lectionner un conteneur avec le param\u00e8tre \u00ab\u00a0<code>exec<\/code>\u00ab\u00a0, puis ajouter les options \u00ab\u00a0<code>-it<\/code>\u00a0\u00bb pour un shell interactif (\u00ab\u00a0<code>i<\/code>\u00a0\u00bb pour interactif et \u00ab\u00a0<code>t<\/code>\u00a0\u00bb pour <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Tty_(Unix)\" data-type=\"link\" data-id=\"https:\/\/fr.wikipedia.org\/wiki\/Tty_(Unix)\">tty<\/a>), et l&rsquo;ID de l&rsquo;image. Enfin, nous pouvons \u00e9crire ce que nous voulons utiliser sur ce conteneur, ici \u00ab\u00a0<code>\/bin\/bash<\/code>\u00ab\u00a0.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/cryptrz.github.io\/assets\/images\/2023-09-19-docker-hacking\/docker-exec.png\"><img loading=\"lazy\" decoding=\"async\" width=\"995\" height=\"167\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-3.png\" alt=\"Linux terminal showing the attack allowing us to start a new session on the Docker container and execute the uname command for checking the Ubuntu version\" class=\"wp-image-52\" title=\"Attack launched for getting a shell on the vulnerable Docker container\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-3.png 995w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-3-300x50.png 300w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-3-768x129.png 768w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-3-990x167.png 990w\" sizes=\"auto, (max-width: 995px) 100vw, 995px\" \/><\/a><\/figure>\n\n\n\n<p>Apr\u00e8s quelques secondes, nous sommes root. Pas d&rsquo;identifiants, pas de confirmation, rien. Juste :<\/p>\n\n\n\n<p>\u00ab Bonjour, c&rsquo;est moi !<br>-OK, fa\u00eetes ce que vous voulez \u00bb.<\/p>\n\n\n\n<p>Maintenant, vous aurez peut-\u00eatre besoin d&rsquo;autres outils. Pour les installer, vous aurez probablement besoin de wget, curl ou git. Sur ce conteneur, curl n&rsquo;est pas disponible, vous pouvez l&rsquo;installer avec : <code>apt install curl -y<\/code><\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/cryptrz.github.io\/assets\/images\/2023-09-19-docker-hacking\/curl-install.png\"><img loading=\"lazy\" decoding=\"async\" width=\"947\" height=\"268\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-1.png\" alt=\"Linux terminal showing that the curl command is not available, installing it\" class=\"wp-image-50\" title=\"Install curl on the Docker container\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-1.png 947w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-1-300x85.png 300w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-1-768x217.png 768w\" sizes=\"auto, (max-width: 947px) 100vw, 947px\" \/><\/a><\/figure>\n\n\n\n<p>Pareil pour\u00a0<strong>wget<\/strong>:\u00a0<code>apt install wget -y<\/code><\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/cryptrz.github.io\/assets\/images\/2023-09-19-docker-hacking\/wget-install.png\"><img loading=\"lazy\" decoding=\"async\" width=\"927\" height=\"264\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-8.png\" alt=\"Linux terminal showing that the wget command is not available, installing it\" class=\"wp-image-57\" title=\"Install wget on the Docker container\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-8.png 927w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-8-300x85.png 300w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-8-768x219.png 768w\" sizes=\"auto, (max-width: 927px) 100vw, 927px\" \/><\/a><\/figure>\n\n\n\n<p>La commande\u00a0<strong>git<\/strong>\u00a0est d\u00e9j\u00e0 disponible, sur ce container. Si elle ne l&rsquo;est pas, vous pouvez l&rsquo;installer avec:\u00a0<code>apt install git -y<\/code><\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/cryptrz.github.io\/assets\/images\/2023-09-19-docker-hacking\/git-help.png\"><img loading=\"lazy\" decoding=\"async\" width=\"672\" height=\"163\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-5.png\" alt=\"Linux terminal showing that the git command is already available\" class=\"wp-image-54\" title=\"git command already installed on the Docker container\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-5.png 672w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2024\/03\/image-5-300x73.png 300w\" sizes=\"auto, (max-width: 672px) 100vw, 672px\" \/><\/a><\/figure>\n\n\n\n<p class=\"has-gray-color has-text-color has-link-color wp-elements-2305cb228055c25937e612908005b6ea\"><\/p>\n\n\n\n<p>Vous pouvez maintenant imaginer ce qu&rsquo;un attaquant malveillant peut faire avec tous ces \u00e9l\u00e9ments, comme lancer une attaque DDoS ex\u00e9cut\u00e9e \u00e0 partir de ce conteneur, scanner anonymement n&rsquo;importe quel serveur sensible et revenir plus tard pour t\u00e9l\u00e9charger les r\u00e9sultats, cr\u00e9er une attaque de phishing ou une page web de clickjacking, etc\u2026<\/p>\n\n\n\n<p>Si vos containers Docker sont accessibles \u00e0 distance, veuillez consulter la section sur la s\u00e9curit\u00e9 dans la documentation officielle et s\u00e9curisez-les :\u00a0<a href=\"https:\/\/docs.docker.com\/engine\/security\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/docs.docker.com\/engine\/security\/<\/a><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-text-align-right\"><em>Cet article a \u00e9t\u00e9 initialement publi\u00e9 sur mon ancien blog h\u00e9berg\u00e9 sur Github.: <a href=\"https:\/\/cryptrz.github.io\/posts\/docker-hacking\/\">Docker hacking | cryptrz<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nous allons voir comment exploiter une fonctionnalit\u00e9 de Docker pour avoir un acc\u00e8s root sans rien faire ou presque &hellip; <a href=\"https:\/\/cryptrz.org\/wordpress\/2024\/08\/26\/le-docker-hacking-en-pratique\/\" class=\"more-link\"><span class=\"readmore\">Continue reading<span class=\"screen-reader-text\">Le Docker Hacking en pratique<\/span><\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_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}},"categories":[8,60],"tags":[17,14,59],"class_list":["post-9212","post","type-post","status-publish","format-standard","hentry","category-hacking","category-securite","tag-containers","tag-shodan","tag-tutoriel"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - 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