{"id":102701,"date":"2021-12-22T09:36:38","date_gmt":"2021-12-22T07:36:38","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/reliz-http-servera-apache-2-4-52-s-ustraneniem-perepolneniya-bufera-v-mod_lua"},"modified":"2021-12-22T09:36:38","modified_gmt":"2021-12-22T07:36:38","slug":"reliz-http-servera-apache-2-4-52-s-ustraneniem-perepolneniya-bufera-v-mod_lua","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sl\/blog\/news\/reliz-http-servera-apache-2-4-52-s-ustraneniem-perepolneniya-bufera-v-mod_lua","title":{"rendered":"Izdan je http-server Apache 2.4.52 sa ispravkom za prelivanje bafera u mod_lua.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Objavljen je izdanjak HTTP servera Apache 2.4.52, u kojem je predstavljeno 25 promena i ispravljena su 2 sigurnosna propusta:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2021-44790 \u2014 prelivanje bafera u mod_lua, koje se manifestuje prilikom obrade zahteva koji se sastoje od vi\u0161e delova (multipart). Ranljivost uti\u010de na konfiguracije u kojima Lua skripte pozivaju funkciju r:parsebody() za obradu tela zahteva, i omogu\u0107ava napada\u010du da dosegne prelivanje bafera slanjem specijalno oblikovanog zahteva. Dok nije otkriveno prisustvo eksploita, potencijalno bi problem mogao dovesti do izvr\u0161enja sopstvenog koda na <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sl\/server\/dts-newyork\/\"   title=\"stre\u017enikom\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2693\">stre\u017enikom<\/a>.\n<li class=\"l\"> CVE-2021-44224 \u2014 SSRF ranljivost (Server Side Request Forgery) u mod_proxy, koja omogu\u0107ava u konfiguracijama sa postavkom \u201eProxyRequests on\u201c da se posebnim URI zahtevom preusmeri zahtev na drugi obrada\u010d na istom serveru koji prihvata veze putem Unix Domain Socket-a. Problem se tako\u0111e mo\u017ee iskoristiti za izazivanje pada kroz kreiranje uslova za dereferenciranje nultog pokaziva\u010da. Problem se odnosi na verzije Apache httpd od verzije 2.4.7.    <\/ul>\n<p>Najistaknutije izmjene vezane uz sigurnost:   <\/p>\n<ul>\n<li class=\"l\"> U mod_ssl je dodata podr\u0161ka za kompilaciju sa bibliotekom OpenSSL 3.\n<li class=\"l\"> Pobolj\u0161ano je prepoznavanje biblioteke OpenSSL u autoconf skriptama.\n<li class=\"l\"> U mod_proxy za protokole tunelovanja omogu\u0107eno je isklju\u010divanje preusmeravanja poluotvorenih (half-close) TCP veza postavljanjem parametra \u201eSetEnv proxy-nohalfclose\u201c.\n<li class=\"l\"> Dodana su dodatna proveravanja da URI-ji koji nisu namenjeni za prosle\u0111ivanje sadr\u017ee http\/https shemu, dok oni koji su namenjeni za prosle\u0111ivanje sadr\u017ee ime hosta.\n<li class=\"l\"> U mod_proxy_connect i mod_proxy zabranjeno je menjanje koda stanja nakon \u0161to je on prosle\u0111en klijentu.\n<li class=\"l\"> Prilikom slanja me\u0111urezultata nakon primitka zahteva sa zaglavljem \u201eExpect: 100-Continue\u201c obezbe\u0111eno je navo\u0111enje u rezultatu stanje \u201e100 Continue\u201c, a ne trenutno stanje zahteva.\n<li class=\"l\"> U mod_dav je dodata podr\u0161ka za CalDAV ekstenzije, pri \u010demu se prilikom generisanja svojstva moraju uzeti u obzir i elementi dokumenta i elementi svojstva. Dodate su nove funkcije dav_validate_root_ns(), dav_find_child_ns(), dav_find_next_ns(), dav_find_attr_ns() i dav_find_attr(), koje se mogu pozvati iz drugih modula.\n<li class=\"l\"> U mpm_event re\u0161en je problem s zaustavljanjem neaktivanih de\u010dijih procesa nakon porasta optere\u0107enja na serveru.\n<li class=\"l\"> U mod_http2 ispravljene su regresivne promene koje su dovele do nepravilnog pona\u0161anja prilikom obrade ograni\u010denja MaxRequestsPerChild i MaxConnectionsPerChild.\n<li class=\"l\"> Raz\u0161irjene mo\u017enosti modula mod_md, ki se uporablja za avtomatizacijo pridobivanja in vzdr\u017eevanja certifikatov z uporabo protokola ACME (Automatic Certificate Management Environment):\n<ul>\n<li class=\"l\"> Dodana je podpora za mehanizem ACME External Account Binding (EAB), ki se aktivira z direktivo MDExternalAccountBinding. Vrednosti za EAB je mogo\u010de nastaviti iz zunanje datoteke v formatu JSON, kar omogo\u010da, da se podatki za avtentikacijo ne razkrijejo v glavni datoteki. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sl\/server\/\"   title=\"konfiguracije stre\u017enika\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"997\">konfiguracije stre\u017enika<\/a>.\n<li class=\"l\"> U direktivi \u2018MDCertificateAuthority\u2019 osigurana je provera navo\u0111enja u parametru URL http\/https ili jednog od unapred definisanih imena (\u2018LetsEncrypt\u2019, \u2018LetsEncrypt-Test\u2019, \u2018Buypass\u2019 i \u2018Buypass-Test\u2019).\n<li class=\"l\">  Dovoljeno je dolo\u010diti direktivo MDContactEmail znotraj sekcije .\n<li class=\"l\"> Odpravljene so bile nekatere napake, vklju\u010dno z nadaljnjim uhajanjem pomnilnika, ki se pojavi v primeru napak pri nalaganju zasebnega klju\u010da.  <\/ul>\n<\/ul>\n<p>Izvor: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56387\">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 HTTP-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 Apache 2.4.52, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043e 25 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439 \u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b 2 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438: CVE-2021-44790 &#8212; \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0431\u0443\u0444\u0435\u0440\u0430 \u0432 mod_lua, \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u044e\u0449\u0435\u0435\u0441\u044f \u043f\u0440\u0438 \u0440\u0430\u0437\u0431\u043e\u0440\u0435 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432, \u0441\u043e\u0441\u0442\u043e\u044f\u0449\u0438\u0445 \u0438\u0437 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u0447\u0430\u0441\u0442\u0435\u0439 (multipart). \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u0435\u0442 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u0438, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 Lua-\u0441\u043a\u0440\u0438\u043f\u0442\u044b \u0432\u044b\u0437\u044b\u0432\u0430\u044e\u0442 \u0444\u0443\u043d\u043a\u0446\u0438\u044e r:parsebody() \u0434\u043b\u044f \u0440\u0430\u0437\u0431\u043e\u0440\u0430 \u0442\u0435\u043b\u0430 \u0437\u0430\u043f\u0440\u043e\u0441\u0430, \u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u043c\u0443 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0431\u0443\u0444\u0435\u0440\u0430 \u0447\u0435\u0440\u0435\u0437 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0443 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0437\u0430\u043f\u0440\u043e\u0441\u0430. \u0424\u0430\u043a\u0442\u043e\u0432 \u043d\u0430\u043b\u0438\u0447\u0438\u044f [&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-102701","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.5 - 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prekora\u010ditev pomnilnika v mod_lua, ki se ka\u017ee pri raz\u010dlenjevanju poizvedb.","canonical_url":"https:\/\/prohoster.info\/sl\/blog\/news\/reliz-http-servera-apache-2-4-52-s-ustraneniem-perepolneniya-bufera-v-mod_lua","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sl_SI","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\u0420\u0435\u043b\u0438\u0437 http-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 Apache 2.4.52 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0431\u0443\u0444\u0435\u0440\u0430 \u0432 mod_lua | ProHoster","og:description":"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 HTTP-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 Apache 2.4.52, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043e 25 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439 \u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b 2 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438: CVE-2021-44790 - 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