{"id":114657,"date":"2024-03-30T00:25:55","date_gmt":"2024-03-29T22:25:55","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-kode-xz-versij-5-6-0-i-5-6-1-obnaruzhen-bekdor"},"modified":"2024-03-30T00:25:55","modified_gmt":"2024-03-29T22:25:55","slug":"v-kode-xz-versij-5-6-0-i-5-6-1-obnaruzhen-bekdor","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/v-kode-xz-versij-5-6-0-i-5-6-1-obnaruzhen-bekdor","title":{"rendered":"V k\u00f3du xz verz\u00ed 5.6.0 a 5.6.1 byl nalezen backdoor","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>V\u00fdvoj\u00e1\u0159 Debian a bezpe\u010dnostn\u00ed v\u00fdzkumn\u00edk Andres Freund hl\u00e1s\u00ed, \u017ee v zdrojov\u00e9m k\u00f3du xz verz\u00ed 5.6.0 a 5.6.1 byl objeven pravd\u011bpodobn\u00fd backdoor.<\/p>\n<p> <noindex><noindex><\/p>\n<p>Backdoor p\u0159edstavuje <a rel=\"nofollow\" href=\"https:\/\/salsa.debian.org\/debian\/xz-utils\/-\/blob\/debian\/unstable\/m4\/build-to-host.m4?ref_type=heads#L63\">\u0159\u00e1dek v jednom z m4 skript\u016f<\/a>, kter\u00fd do konce skriptu configure dopisuje obfuskovan\u00fd \u0161kodliv\u00fd k\u00f3d. Tento k\u00f3d pak modifikuje jeden ze vygenerovan\u00fdch Makefile projektu, co\u017e nakonec vede k tomu, \u017ee se \u0161kodliv\u00fd k\u00f3d (skryt\u00fd pod testovac\u00edm arch\u00edvem bad-3-corrupt_lzma2.xz) dostane do bin\u00e1rn\u00edho souboru liblzma.<\/p>\n<p><\/noindex><\/noindex> <\/p>\n<p>Zvl\u00e1\u0161tnost\u00ed incidentu je, \u017ee \u0161kodliv\u00fd k\u00f3d je obsa\u017een <em>pouze<\/em> v distribuovan\u00fdch tar archivech se zdrojov\u00fdm k\u00f3dem a nen\u00ed p\u0159\u00edtomen v git repozit\u00e1\u0159i projektu.<\/p>\n<p>Podle zpr\u00e1v osoba, pod jej\u00ed\u017e jm\u00e9nem byl \u0161kodliv\u00fd k\u00f3d p\u0159id\u00e1n do repozit\u00e1\u0159e projektu, je bu\u010f p\u0159\u00edmo zapojena do ud\u00e1losti, nebo se stala ob\u011bt\u00ed z\u00e1va\u017en\u00e9 kompromitace sv\u00fdch osobn\u00edch \u00fa\u010dt\u016f (ale v\u00fdzkumn\u00edk se klon\u00ed k prvn\u00edmu variant\u011b, proto\u017ee tato osoba se osobn\u011b \u00fa\u010dastnila n\u011bkolika diskuz\u00ed t\u00fdkaj\u00edc\u00edch se \u0161kodliv\u00fdch zm\u011bn).<\/p>\n<p>Na odkazu v\u00fdzkumn\u00edk uv\u00e1d\u00ed, \u017ee kone\u010dn\u00fdm c\u00edlem backdooru je pravd\u011bpodobn\u011b injekce k\u00f3du do procesu sshd a substituce k\u00f3du pro ov\u011b\u0159ov\u00e1n\u00ed RSA kl\u00ed\u010d\u016f, a uv\u00e1d\u00ed n\u011bkolik zp\u016fsob\u016f, jak nep\u0159\u00edmo zkontrolovat, zda se \u0161kodliv\u00fd k\u00f3d pr\u00e1v\u011b nyn\u00ed vykon\u00e1v\u00e1 ve va\u0161\u00ed syst\u00e9mu.<\/p>\n<p> <noindex><\/p>\n<p>Podle \u010dl\u00e1nku zpr\u00e1vy <a rel=\"nofollow\" href=\"https:\/\/news.opensuse.org\/2024\/03\/29\/xz-backdoor\/\">projektu openSUSE<\/a>, vzhledem k slo\u017eitosti k\u00f3du zadn\u00edho za\u0159\u00edzen\u00ed a p\u0159edpokl\u00e1dan\u00e9mu mechanismu jeho vyu\u017eit\u00ed je obt\u00ed\u017en\u00e9 stanovit, zda se \u201espustil\u201c alespo\u0148 jednou na tomto po\u010d\u00edta\u010di, a doporu\u010duje kompletn\u00ed p\u0159einstalaci opera\u010dn\u00edho syst\u00e9mu s rotac\u00ed v\u0161ech relevantn\u00edch kl\u00ed\u010d\u016f na v\u0161ech po\u010d\u00edta\u010d\u00edch, na kter\u00fdch se alespo\u0148 jednou objevily infikovan\u00e9 verze xz.<\/p>\n<p><\/noindex><\/p>\n<p>Zdroj: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.linux.org.ru\/news\/security\/17567724\">linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a Debian \u0438 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u0432 \u0441\u0444\u0435\u0440\u0435 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 Andres Freund \u0441\u043e\u043e\u0431\u0449\u0430\u0435\u0442 \u043e\u0431 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0438\u0438 \u0432\u0435\u0440\u043e\u044f\u0442\u043d\u043e\u0433\u043e \u0431\u044d\u043a\u0434\u043e\u0440\u0430 \u0432 \u0438\u0441\u0445\u043e\u0434\u043d\u043e\u043c \u043a\u043e\u0434\u0435 xz \u0432\u0435\u0440\u0441\u0438\u0439 5.6.0 \u0438 5.6.1. \u0411\u044d\u043a\u0434\u043e\u0440 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u0441\u043e\u0431\u043e\u0439 \u0441\u0442\u0440\u043e\u0447\u043a\u0443 \u0432 \u043e\u0434\u043d\u043e\u043c \u0438\u0437 m4-\u0441\u043a\u0440\u0438\u043f\u0442\u043e\u0432, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0434\u043e\u043f\u0438\u0441\u044b\u0432\u0430\u0435\u0442 \u043e\u0431\u0444\u0443\u0441\u0446\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u0432\u0440\u0435\u0434\u043e\u043d\u043e\u0441\u043d\u044b\u0439 \u043a\u043e\u0434 \u0432 \u043a\u043e\u043d\u0435\u0446 \u0441\u043a\u0440\u0438\u043f\u0442\u0430 configure. \u042d\u0442\u043e\u0442 \u043a\u043e\u0434 \u0437\u0430\u0442\u0435\u043c \u043c\u043e\u0434\u0438\u0444\u0438\u0446\u0438\u0440\u0443\u0435\u0442 \u043e\u0434\u0438\u043d \u0438\u0437 \u0441\u0433\u0435\u043d\u0435\u0440\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 Makefile \u043f\u0440\u043e\u0435\u043a\u0442\u0430, \u0447\u0442\u043e \u0432 \u043a\u043e\u043d\u0435\u0447\u043d\u043e\u043c \u0438\u0442\u043e\u0433\u0435 \u043f\u0440\u0438\u0432\u043e\u0434\u0438\u0442 \u043a [&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-114657","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - 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Backdoor p\u0159edstavuje.","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/news\/v-kode-xz-versij-5-6-0-i-5-6-1-obnaruzhen-bekdor","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"cs_CZ","og:site_name":"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 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0412 \u043a\u043e\u0434\u0435 xz \u0432\u0435\u0440\u0441\u0438\u0439 5.6.0 \u0438 5.6.1 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d \u0431\u044d\u043a\u0434\u043e\u0440 | ProHoster","og:description":"\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a Debian \u0438 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u0432 \u0441\u0444\u0435\u0440\u0435 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 Andres Freund \u0441\u043e\u043e\u0431\u0449\u0430\u0435\u0442 \u043e\u0431 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0438\u0438 \u0432\u0435\u0440\u043e\u044f\u0442\u043d\u043e\u0433\u043e \u0431\u044d\u043a\u0434\u043e\u0440\u0430 \u0432 \u0438\u0441\u0445\u043e\u0434\u043d\u043e\u043c \u043a\u043e\u0434\u0435 xz \u0432\u0435\u0440\u0441\u0438\u0439 5.6.0 \u0438 5.6.1. \u0411\u044d\u043a\u0434\u043e\u0440 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442.","og:url":"https:\/\/prohoster.info\/cs\/blog\/news\/v-kode-xz-versij-5-6-0-i-5-6-1-obnaruzhen-bekdor","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2024-03-29T22:25:55+00:00","article:modified_time":"2024-03-29T22:25:55+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/114657","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/comments?post=114657"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/114657\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media?parent=114657"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/categories?post=114657"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/tags?post=114657"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}