{"id":114415,"date":"2024-03-19T00:25:59","date_gmt":"2024-03-18T22:25:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/kiddy-modul-yadra-linux-dlya-zashhity-ot-skript-kiddi"},"modified":"2024-03-19T00:25:59","modified_gmt":"2024-03-18T22:25:59","slug":"kiddy-modul-yadra-linux-dlya-zashhity-ot-skript-kiddi","status":"publish","type":"post","link":"https:\/\/prohoster.info\/fr\/blog\/news\/kiddy-modul-yadra-linux-dlya-zashhity-ot-skript-kiddi","title":{"rendered":"Kiddy \u2014 un module du noyau Linux pour protection contre les script kiddies","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex>      <noindex><\/p>\n<p><a rel=\"nofollow\" href=\"https:\/\/github.com\/milabs\/kiddy\">Kiddy<\/a> &ndash; un module pour le noyau Linux, con\u00e7u pour r\u00e9duire les risques d'exploitation de (certaines) vuln\u00e9rabilit\u00e9s du noyau.<\/p>\n<p><\/noindex><\/noindex> <\/p>\n<p>La protection mise en \u0153uvre dans ce module repose sur une id\u00e9e simple, \u00e0 savoir que lors d'une attaque, l'identification de l'objet cible se produit d'une mani\u00e8re ou d'une autre. Par cons\u00e9quent, rendre cette identification plus difficile peut augmenter consid\u00e9rablement la complexit\u00e9 de l'exploitation, car dans de nombreux cas, les exploits pr\u00eats \u00e0 l'emploi contiennent des tableaux de diff\u00e9rents types d\u00e9cal\u00e9s (offsets) correspondant aux versions cibles du noyau.<\/p>\n<p> <noindex><\/p>\n<p>Par exemple, voici comment cela est fait pour <a rel=\"nofollow\" href=\"https:\/\/github.com\/xairy\/kernel-exploits\/blob\/master\/CVE-2017-1000112\/poc.c#L91\">CVE-2017-1000112<\/a>. On peut \u00e9galement voir ici que l'identification de la version du noyau se fait \u00e0 l'aide de uname.<\/p>\n<p><\/noindex> <\/p>\n<p>Le module d\u00e9velopp\u00e9 est simple \u00e0 mettre en \u0153uvre et permet de :<\/p>\n<ul>\n<li>modifier l'identification du noyau ;<\/li>\n<li>limiter l'acc\u00e8s aux journaux du noyau (dmesg) ;<\/li>\n<li>limiter l'acc\u00e8s \u00e0 certains fichiers dans \/proc, contenant \u00e9galement des informations identifiantes ;<\/li>\n<li>limiter l'acc\u00e8s aux fichiers et dossiers pouvant contenir des informations identifiantes ;<\/li>\n<li>modifier l'identification de la version du noyau accessible via vDSO.<\/li>\n<\/ul>\n<p>Lors de la compilation, le module permet d'utiliser les soi-disant &laquo; presets &raquo;, qui mettent en \u0153uvre diff\u00e9rentes logiques de changement d'identification. Par exemple, en utilisant le preset &laquo; windows &raquo;, on peut obtenir le comportement suivant :<\/p>\n<p><strong>Avant le chargement du module<\/strong><\/p>\n<p> $ .\/misc\/id.sh ** FUZZY identidty leaks  &#8212; uname -r    2.6.32-754.35.1.el6.x86_64  &#8212; uname -v    #1 SMP Sam Nov 7 12:42:14 UTC 2020  &#8212; uname -a    Linux localhost.localdomain 2.6.32-754.35.1.el6.x86_64 #1 SMP Sam Nov 7 12:42:14 UTC 2020 x86_64 x86_64 x86_64 GNU\/Linux ** PROCFS identidty leaks  &#8212; \/proc\/cmdline    ro root=\/dev\/mapper\/VolGroup00-LogVol00 rd_NO_LUKS no_timer_check console=tty0 console=ttyS0,115200n8 net.ifnames=0 biosdevname=0 LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16  rd_LVM_LV=VolGroup00\/LogVol01 rd_LVM_LV=VolGroup00\/LogVol00  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet  &#8212; \/proc\/version    Version Linux 2.6.32-754.35.1.el6.x86_64 (mockbuild@x86-02.bsys.centos.org) (version de gcc 4.4.7 20120313 (Red Hat 4.4.7-23) (GCC)) #1 SMP Sam Nov 7 12:42:14 UTC 2020  &#8212; \/proc\/sys\/kernel\/version    #1 SMP Sam Nov 7 12:42:14 UTC 2020  &#8212; \/proc\/sys\/kernel\/osrelease    2.6.32-754.35.1.el6.x86_64 which: no hostnamectl in (\/usr\/local\/bin:\/bin:\/usr\/bin:\/usr\/local\/sbin:\/usr\/sbin:\/sbin:\/home\/vagrant\/bin)   <\/p>\n<p><strong>Apr\u00e8s le chargement du module<\/strong><\/p>\n<p> $ .\/misc\/id.sh ** FUZZY identidty leaks  &#8212; uname -r    Windows  &#8212; uname -v    NT 4.0  &#8212; uname -a    Linux localhost.localdomain Windows NT 4.0 x86_64 x86_64 x86_64 GNU\/Linux ** PROCFS identidty leaks  &#8212; \/proc\/cmdline    EFIMicrosoftBootbootmgfw.efi  &#8212; \/proc\/version    Windows NT 4.0  &#8212; \/proc\/sys\/kernel\/version    NT 4.0  &#8212; \/proc\/sys\/kernel\/osrelease    Windows which: no hostnamectl in (\/usr\/local\/bin:\/bin:\/usr\/bin:\/usr\/local\/sbin:\/usr\/sbin:\/sbin:\/home\/vagrant\/bin)   <\/p>\n<p>Les scripts kiddies ne passeront pas !<\/p>\n<p>Source : <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.linux.org.ru\/news\/security\/17555973\">linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>Kiddy &ndash; \u043c\u043e\u0434\u0443\u043b\u044c \u0434\u043b\u044f \u044f\u0434\u0440\u0430 Linux, \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0430\u043d\u043d\u044b\u0439 \u0441 \u0446\u0435\u043b\u044c\u044e \u0441\u043d\u0438\u0436\u0435\u043d\u0438\u044f \u0440\u0438\u0441\u043a\u043e\u0432 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 (\u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0445) \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u044f\u0434\u0440\u0430. \u0412 \u043e\u0441\u043d\u043e\u0432\u0435 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430 \u0437\u0430\u0449\u0438\u0442\u044b, \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u0432 \u0434\u0430\u043d\u043d\u043e\u043c \u043c\u043e\u0434\u0443\u043b\u0435, \u043b\u0435\u0436\u0438\u0442 \u043f\u0440\u043e\u0441\u0442\u0430\u044f \u0438\u0434\u0435\u044f, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0437\u0430\u043a\u043b\u044e\u0447\u0430\u0435\u0442\u0441\u044f \u0432 \u0442\u043e\u043c, \u0447\u0442\u043e \u0432 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0435 \u0430\u0442\u0430\u043a\u0438 \u0442\u0430\u043a \u0438\u043b\u0438 \u0438\u043d\u0430\u0447\u0435 \u043f\u0440\u043e\u0438\u0441\u0445\u043e\u0434\u0438\u0442 \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f \u043e\u0431\u044a\u0435\u043a\u0442\u0430 \u0430\u0442\u0430\u043a\u0438. \u041f\u043e\u044d\u0442\u043e\u043c\u0443, \u0435\u0441\u043b\u0438 \u0437\u0430\u0442\u0440\u0443\u0434\u043d\u0438\u0442\u044c \u0442\u0430\u043a\u0443\u044e \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044e, \u043c\u043e\u0436\u043d\u043e \u043a\u0440\u0430\u0442\u043d\u043e \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u043b\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438, \u0442.\u043a. \u0432\u043e \u043c\u043d\u043e\u0436\u0435\u0441\u0442\u0432\u0435 \u0441\u043b\u0443\u0447\u0430\u0435\u0432 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-114415","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Kiddy \u2013 \u043c\u043e\u0434\u0443\u043b\u044c \u0434\u043b\u044f \u044f\u0434\u0440\u0430 Linux, \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0430\u043d\u043d\u044b\u0439 \u0441 \u0446\u0435\u043b\u044c\u044e \u0441\u043d\u0438\u0436\u0435\u043d\u0438\u044f \u0440\u0438\u0441\u043a\u043e\u0432 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 (\u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0445) \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u044f\u0434\u0440\u0430..\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/fr\/blog\/news\/kiddy-modul-yadra-linux-dlya-zashhity-ot-skript-kiddi\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.2.1\" \/>\n\t\t<meta property=\"og:locale\" content=\"fr_FR\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 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