{"id":121341,"date":"2025-01-15T03:45:59","date_gmt":"2025-01-15T01:45:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-rsync-3-4-0-ustraneny-uyazvimosti-pozvolyavshie-vypolnit-kod-na-servere-i-kliente"},"modified":"2025-01-15T03:45:59","modified_gmt":"2025-01-15T01:45:59","slug":"v-rsync-3-4-0-ustraneny-uyazvimosti-pozvolyavshie-vypolnit-kod-na-servere-i-kliente","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/v-rsync-3-4-0-ustraneny-uyazvimosti-pozvolyavshie-vypolnit-kod-na-servere-i-kliente","title":{"rendered":"Ve verzi Rsync 3.4.0 byly odstran\u011bny zranitelnosti, kter\u00e9 umo\u017e\u0148ovaly spou\u0161t\u011bn\u00ed k\u00f3du na serveru a klientovi.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Bylo vyd\u00e1no nov\u00e9 vyd\u00e1n\u00ed n\u00e1stroje pro synchronizaci soubor\u016f Rsync 3.4.0, kter\u00e9 odstra\u0148uje \u0161est zranitelnost\u00ed. Kombinace zranitelnost\u00ed CVE-2024-12084 a CVE-2024-12085 umo\u017e\u0148uje klientovi prov\u00e9st sv\u016fj k\u00f3d na serveru. K \u00fatoku sta\u010d\u00ed anonymn\u00ed p\u0159ipojen\u00ed k serveru Rsync s p\u0159\u00edstupem pro \u010dten\u00ed. Nap\u0159\u00edklad \u00fatok lze prov\u00e9st na zrcadla r\u016fzn\u00fdch distribuc\u00ed a projekt\u016f, kter\u00e9 poskytuj\u00ed mo\u017enost stahov\u00e1n\u00ed sestaven\u00ed p\u0159es Rsync. Probl\u00e9m se tak\u00e9 t\u00fdk\u00e1 r\u016fzn\u00fdch aplikac\u00ed pro synchronizaci soubor\u016f a z\u00e1lohov\u00e1n\u00ed, kter\u00e9 pou\u017e\u00edvaj\u00ed Rsync jako backend, jako jsou Rclone, DeltaCopy a ChronoSync.    <\/p>\n<p>Nav\u00edc, vyu\u017eit\u00edm zranitelnosti na <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/server\/dts-newyork\/\"   title=\"serveru\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2736\">serveru<\/a> \u00fato\u010dn\u00edk m\u016f\u017ee uspo\u0159\u00e1dat \u00fatok na klienty p\u0159ipojuj\u00edc\u00ed se k serveru a dos\u00e1hnout \u010dten\u00ed nebo z\u00e1pisu jak\u00fdchkoli soubor\u016f v jejich syst\u00e9mu, pokud to dovoluj\u00ed opr\u00e1vn\u011bn\u00ed procesu rsync. Nap\u0159\u00edklad, prost\u0159ednictv\u00edm vytvo\u0159en\u00ed \u0161kodliv\u00fdch rsync-<a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/server\/\"   title=\"servery\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1681\">servery<\/a> lze organizovat stahov\u00e1n\u00ed SSH kl\u00ed\u010d\u016f nebo dos\u00e1hnout spu\u0161t\u011bn\u00ed k\u00f3du p\u0159eps\u00e1n\u00edm takov\u00fdch soubor\u016f, jako jsou ~\/ .bashrc a ~\/ .popt.      <\/p>\n<p>Pro usnadn\u011bn\u00ed kontroly aktualizace server\u016f na novou verzi Rsync byl \u010d\u00edslo protokolu ve vyd\u00e1n\u00ed Rsync 3.4.0 zv\u00fd\u0161eno na 32. Sledovat v\u00fdskyt aktualizac\u00ed v distribuc\u00edch lze na n\u00e1sleduj\u00edc\u00edch str\u00e1nk\u00e1ch: Debian, Ubuntu, RHEL, SUSE\/openSUSE, Fedora, Arch, FreeBSD.       <\/p>\n<p>Zji\u0161t\u011bn\u00e9 zranitelnosti:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2024-12084 &#8212; p\u0159ete\u010den\u00ed vyrovn\u00e1vac\u00edho prostoru zp\u016fsoben\u00e9 p\u0159enosem neplatn\u00e9 kontroln\u00ed sou\u010dtu o velikosti v\u011bt\u0161\u00ed ne\u017e 16 byt\u016f.\n<li class=\"l\"> CVE-2024-12085 &#8212; \u00fanik obsahu neinicializovan\u00fdch dat ze z\u00e1sobn\u00edku (po jednom bytu) p\u0159i prov\u00e1d\u011bn\u00ed operac\u00ed porovn\u00e1v\u00e1n\u00ed kontroln\u00edch sou\u010dt\u016f nespr\u00e1vn\u00e9 velikosti.\n<li class=\"l\"> CVE-2024-12086 &#8212; z\u00edsk\u00e1n\u00ed p\u0159\u00edstupu serveru k obsahu libovoln\u00fdch soubor\u016f z klientsk\u00e9ho syst\u00e9mu prost\u0159ednictv\u00edm generov\u00e1n\u00ed nespr\u00e1vn\u00fdch komunika\u010dn\u00edch token\u016f a kontroln\u00edch sou\u010dt\u016f p\u0159i kop\u00edrov\u00e1n\u00ed soubor\u016f z klienta na server (ur\u010den\u00ed obsahu po bytech prost\u0159ednictv\u00edm z\u00edsk\u00e1v\u00e1n\u00ed kontroln\u00ed sou\u010dtu).\n<li class=\"l\"> CVE-2024-12087 &#8212; p\u0159\u00edstup mimo z\u00e1kladn\u00ed adres\u00e1\u0159 p\u0159i pou\u017eit\u00ed volby &#171;&#8212;inc-recursive&#187; (ve v\u00fdchoz\u00edm nastaven\u00ed povolena pro mnoho p\u0159\u00edznak\u016f). Zranitelnost je zp\u016fsobena nedostate\u010dnou kontrolou symbolick\u00fdch odkaz\u016f a umo\u017e\u0148uje zapisovat soubory mimo ur\u010den\u00fd c\u00edlov\u00fd adres\u00e1\u0159 klienta. \u00dato\u010dn\u00edkovy servery mohou tuto zranitelnost vyu\u017e\u00edt k \u00fatoku na syst\u00e9m p\u0159ipojen\u00e9ho klienta.\n<li class=\"l\"> CVE-2024-12088 &#8212; nespr\u00e1vn\u00e1 kontrola symbolick\u00fdch odkaz\u016f, kter\u00e9 odkazuj\u00ed na jin\u00e9 symbolick\u00e9 odkazy, p\u0159i pou\u017eit\u00ed volby &#171;&#8212;safe-links&#187;. Probl\u00e9m umo\u017e\u0148uje p\u0159\u00edstup mimo z\u00e1kladn\u00ed adres\u00e1\u0159 a zapisov\u00e1n\u00ed dat do libovoln\u00e9ho souboru v syst\u00e9mu, jak to umo\u017e\u0148uj\u00ed povolen\u00ed.\n<li class=\"l\"> CVE-2024-12747 &#8212; z\u00e1vodn\u00ed stav p\u0159i pr\u00e1ci se symbolick\u00fdmi odkazy, kter\u00fd umo\u017e\u0148uje u\u017eivateli zv\u00fd\u0161it sv\u00e9 opr\u00e1vn\u011bn\u00ed a z\u00edskat p\u0159\u00edstup k privilegovan\u00fdm soubor\u016fm na serveru.    <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=62557\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0443\u0442\u0438\u043b\u0438\u0442\u044b \u0434\u043b\u044f \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0444\u0430\u0439\u043b\u043e\u0432 Rsync 3.4.0, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043e \u0448\u0435\u0441\u0442\u044c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439. \u041a\u043e\u043c\u0431\u0438\u043d\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 CVE-2024-12084 \u0438 CVE-2024-12085 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043a\u043b\u0438\u0435\u043d\u0442\u0443 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0441\u0432\u043e\u0435\u0433\u043e \u043a\u043e\u0434\u0430 \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0435. \u0414\u043b\u044f \u0441\u043e\u0432\u0435\u0440\u0448\u0435\u043d\u0438\u044f \u0430\u0442\u0430\u043a\u0438 \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u0430\u043d\u043e\u043d\u0438\u043c\u043d\u043e\u0433\u043e \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u043a \u0441\u0435\u0440\u0432\u0435\u0440\u0443 Rsync \u0441 \u0434\u043e\u0441\u0442\u0443\u043f\u043e\u043c \u043d\u0430 \u0447\u0442\u0435\u043d\u0438\u0435. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0430\u0442\u0430\u043a\u0430 \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u0441\u043e\u0432\u0435\u0440\u0448\u0435\u043d\u0430 \u043d\u0430 \u0437\u0435\u0440\u043a\u0430\u043b\u0430 \u0440\u0430\u0437\u043b\u0438\u0447\u043d\u044b\u0445 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u043e\u0432 \u0438 \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u0432, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0438\u0445 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 \u0441\u0431\u043e\u0440\u043e\u043a \u0447\u0435\u0440\u0435\u0437 [&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-121341","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0443\u0442\u0438\u043b\u0438\u0442\u044b \u0434\u043b\u044f \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0444\u0430\u0439\u043b\u043e\u0432 Rsync 3.4.0, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043e \u0448\u0435\u0441\u0442\u044c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439.\" 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