{"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\/sk\/blog\/news\/v-rsync-3-4-0-ustraneny-uyazvimosti-pozvolyavshie-vypolnit-kod-na-servere-i-kliente","title":{"rendered":"V Rsync 3.4.0 boli odstr\u00e1nen\u00e9 zranite\u013enosti, ktor\u00e9 umo\u017enili vykona\u0165 k\u00f3d na serveri a kliente","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Bol to vydan\u00fd nov\u00fd release n\u00e1stroja na synchroniz\u00e1ciu s\u00faborov Rsync 3.4.0, v ktorom bolo opraven\u00fdch \u0161es\u0165 zranite\u013enost\u00ed. Kombin\u00e1cia zranite\u013enost\u00ed CVE-2024-12084 a CVE-2024-12085 umo\u017e\u0148uje \u00fato\u010dn\u00edkovi vykona\u0165 svoj k\u00f3d na serveri. Na uskuto\u010dnenie \u00fatoku sta\u010d\u00ed anonymn\u00e9 pripojenie k serveru Rsync s pr\u00edstupom na \u010d\u00edtanie. Napr\u00edklad \u00fatok m\u00f4\u017ee by\u0165 uskuto\u010dnen\u00fd na zrkadl\u00e1ch r\u00f4znych distrib\u00faci\u00ed a projektov, ktor\u00e9 poskytuj\u00fa mo\u017enos\u0165 s\u0165ahovania zost\u00e1v cez Rsync. Probl\u00e9m sa t\u00fdka aj r\u00f4znych aplik\u00e1ci\u00ed na synchroniz\u00e1ciu s\u00faborov a z\u00e1lohovanie, ktor\u00e9 pou\u017e\u00edvaj\u00fa Rsync ako backend, ako s\u00fa Rclone, DeltaCopy a ChronoSync.    <\/p>\n<p>Navy\u0161e, zneu\u017eit\u00edm zranite\u013enosti na <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sk\/server\/dts-newyork\/\"   title=\"serveri\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2736\">serveri<\/a> \u00fato\u010dn\u00edk m\u00f4\u017ee organizova\u0165 \u00fatok na pripojuj\u00facich sa klientov k serveru a dosiahnu\u0165 \u010d\u00edtanie alebo z\u00e1pis ak\u00fdchko\u013evek s\u00faborov v ich syst\u00e9me, pokia\u013e to umo\u017e\u0148uj\u00fa pr\u00e1va pr\u00edstupu procesu rsync. Napr\u00edklad, cez vytvorenie \u0161kodliv\u00e9ho rsync-<a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sk\/server\/\"   title=\"serverov\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1681\">serverov<\/a> je mo\u017en\u00e9 realizova\u0165 s\u0165ahovanie SSH k\u013e\u00fa\u010dov alebo dosiahnu\u0165 vykonanie k\u00f3du prep\u00edsan\u00edm tak\u00fdch s\u00faborov, ako s\u00fa ~\/ .bashrc a ~\/ .popt.      <\/p>\n<p>Aby sa u\u013eah\u010dila kontrola aktualiz\u00e1cie serverov na nov\u00fa verziu Rsync, \u010d\u00edslo protokolu v vydan\u00ed Rsync 3.4.0 bolo zv\u00fd\u0161en\u00e9 na 32. Sledova\u0165 vzh\u013ead aktualiz\u00e1ci\u00ed v distrib\u00faci\u00e1ch je mo\u017en\u00e9 na nasleduj\u00facich str\u00e1nkach: Debian, Ubuntu, RHEL, SUSE\/openSUSE, Fedora, Arch, FreeBSD.       <\/p>\n<p>Odhalen\u00e9 zranite\u013enosti:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2024-12084 \u2014 z\u00e1pis mimo pridelen\u00fd buffer cez prenos nespr\u00e1vnej kontrolnej sumy, ktorej ve\u013ekos\u0165 presahuje 16 bajtov.\n<li class=\"l\"> CVE-2024-12085 \u2014 \u00fanik obsahu neinicializovan\u00fdch \u00fadajov zo z\u00e1sobn\u00edka (po jednom byte za \u010das) pri vykon\u00e1van\u00ed oper\u00e1ci\u00ed porovnania kontroln\u00fdch s\u00fam nespr\u00e1vnej ve\u013ekosti.\n<li class=\"l\"> CVE-2024-12086 \u2014 pr\u00edstup servera k obsahu \u013eubovo\u013en\u00fdch s\u00faborov zo syst\u00e9mu klienta cez generovanie nespr\u00e1vnych komunika\u010dn\u00fdch tokenov a kontroln\u00fdch s\u00fam pri kop\u00edrovan\u00ed s\u00faborov z klienta na server (ur\u010denie obsahu byte po byte cez zl\u00fa kontroln\u00fa s\u00famu).\n<li class=\"l\"> CVE-2024-12087 \u2014 prekro\u010denie z\u00e1kladn\u00e9ho adres\u00e1ra pri pou\u017eit\u00ed vo\u013eby \u201e--inc-recursive\u201c (povolen\u00e9 predvolene pre mnoh\u00e9 mo\u017enosti). Zranite\u013enos\u0165 je sp\u00f4soben\u00e1 absenciou riadneho overovania symbolick\u00fdch odkazov a umo\u017e\u0148uje zapisova\u0165 s\u00fabory mimo ur\u010den\u00e9ho cie\u013ea klientom. Pod kontrolou \u00fato\u010dn\u00edka m\u00f4\u017ee server vyu\u017ei\u0165 zranite\u013enos\u0165 na \u00fatok na syst\u00e9m pripojen\u00e9ho klienta.\n<li class=\"l\"> CVE-2024-12088 \u2014 nespr\u00e1vne overovanie symbolick\u00fdch odkazov, ktor\u00e9 ukazuj\u00fa na in\u00e9 symbolick\u00e9 odkazy, pri pou\u017eit\u00ed vo\u013eby \u201e--safe-links\u201c. Probl\u00e9m umo\u017e\u0148uje prekro\u010di\u0165 z\u00e1kladn\u00fd adres\u00e1r a zap\u00edsa\u0165 \u00fadaje do ak\u00e9hoko\u013evek s\u00faboru v syst\u00e9me, pokia\u013e to dovo\u013euj\u00fa pr\u00edstupov\u00e9 pr\u00e1va.\n<li class=\"l\"> CVE-2024-12747 \u2014 stav s\u00fa\u0165a\u017ee pri pr\u00e1ci so symbolick\u00fdmi odkazmi, ktor\u00fd umo\u017e\u0148uje pou\u017e\u00edvate\u013eovi zv\u00fd\u0161i\u0165 svoje opr\u00e1vnenia a z\u00edska\u0165 pr\u00edstup k privilegovan\u00fdm s\u00faborom na serveri.    <\/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 5.0.4 - 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 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\u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0432\u0448\u0438\u0435 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0435 \u0438 \u043a\u043b\u0438\u0435\u043d\u0442\u0435 | ProHoster","og:description":"\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 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