{"id":118103,"date":"2024-07-22T21:43:01","date_gmt":"2024-07-22T19:43:01","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-sistemnoj-biblioteki-glibc-2-40"},"modified":"2024-07-22T21:43:01","modified_gmt":"2024-07-22T19:43:01","slug":"vypusk-sistemnoj-biblioteki-glibc-2-40","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/vypusk-sistemnoj-biblioteki-glibc-2-40","title":{"rendered":"Vyd\u00e1n\u00ed syst\u00e9mov\u00e9 knihovny Glibc 2.40","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Po \u0161esti m\u011bs\u00edc\u00edch v\u00fdvoje byl vyd\u00e1n nov\u00fd syst\u00e9mov\u00fd knihovn\u00ed bal\u00ed\u010dek GNU C Library (glibc) 2.40, kter\u00fd pln\u011b vyhovuje po\u017eadavk\u016fm norem ISO C11 a POSIX.1-2017. Nov\u00e1 verze zahrnuje opravy od 68 v\u00fdvoj\u00e1\u0159\u016f.     <\/p>\n<p>Mezi vylep\u0161en\u00edmi implementovan\u00fdmi v Glibc 2.40 lze vyzdvihnout:   <\/p>\n<ul>\n<li class=\"l\"> Do hlavi\u010dkov\u00e9ho souboru math.h byly p\u0159id\u00e1ny nov\u00e9 exponenci\u00e1ln\u00ed a logaritmick\u00e9 funkce definovan\u00e9 v norm\u011b C23: exp2m1, exp10m1, log2p1, log10p1 a logp1. Funkce jsou k dispozici v variant\u00e1ch pro typy float, double, long double, _FloatN a _FloatNx.\n<li class=\"l\"> Byl p\u0159id\u00e1n makro _ISOC23_SOURCE, kter\u00e9 definuje pou\u017eit\u00ed funkc\u00ed nab\u00edzen\u00fdch v norm\u011b C23 (v sou\u010dasnosti je v Glibc implementov\u00e1na pouze \u010d\u00e1st funkc\u00ed C23). Pou\u017eit\u00ed C23 lze tak\u00e9 povolit p\u0159i kompilaci pomoc\u00ed volby v GCC -std=c23, -std=gnu23, -std=c2x nebo -std=gnu2x.\n<li class=\"l\"> Byla p\u0159id\u00e1na volba \u201eglibc.rtld.enable_secure\u201c, kter\u00e1 umo\u017e\u0148uje p\u0159i testov\u00e1n\u00ed spou\u0161t\u011bt program tak, jako by m\u011bl vlajku pro zm\u011bnu u\u017eivatelsk\u00e9ho ID (setuid).\n<li class=\"l\"> Na platform\u011b Linux byl hlavi\u010dkov\u00fd soubor epoll.h aktualizov\u00e1n pro podporu nov\u00fdch ioctl a struktur epoll, kter\u00e9 se objevily v j\u00e1d\u0159e Linux 6.9.\n<li class=\"l\"> Funk\u010dnost pro odhalov\u00e1n\u00ed mo\u017en\u00fdch p\u0159ete\u010den\u00ed z\u00e1sobn\u00edku a souvisej\u00edc\u00edch bezpe\u010dnostn\u00edch chyb b\u011bhem prov\u00e1d\u011bn\u00ed funkc\u00ed pr\u00e1ce s \u0159et\u011bzci a spr\u00e1vy pam\u011bti (\u201e_FORTIFY_SOURCE\u201c) byla upravena pro kompilaci Glibc pomoc\u00ed p\u0159eklada\u010de Clang.\n<li class=\"l\"> V knihovn\u011b s vektorov\u00fdmi matematick\u00fdmi funkcemi (libmvec) byly navr\u017eeny implementace funkc\u00ed acosh, asinh, atanh, cbrt, cosh, erf, erfc, hypot, pow, sinh a tanh pro architekturu Aarch64.\n<li class=\"l\"> Na syst\u00e9mech x86 byla pro urychlen\u00ed z\u00e1pisu velk\u00fdch datov\u00fdch sad do funkce memset p\u0159id\u00e1na mo\u017enost zak\u00e1zat pou\u017e\u00edv\u00e1n\u00ed do\u010dasn\u00fdch z\u00e1sobn\u00edk\u016f. Optimalizace se aktivuje pomoc\u00ed nastaven\u00ed \u201ex86_memset_non_temporal_threshold\u201c.\n<li class=\"l\"> Makra v hlavi\u010dkov\u00e9m souboru stdbit.h, pracuj\u00edc\u00ed s r\u016fzn\u00fdmi typy (type-generic), byla p\u0159i pou\u017eit\u00ed GCC 14 p\u0159evedena na pou\u017eit\u00ed vestav\u011bn\u00fdch funkc\u00ed __builtin_stdc_bit_ceil pro podporu operand\u016f s typy __int128 a _BitInt(N).\n<li class=\"l\"> Pole s epoch\u00e1ln\u00edm po\u010d\u00edtadlem \u010dasu ve struktur\u00e1ch lastlog, utmp a utmpx byla p\u0159evedena z pou\u017eit\u00ed 32bitov\u00e9ho podepsan\u00e9ho typu na nepodepsan\u00fd typ, co\u017e umo\u017e\u0148uje prodlou\u017eit maxim\u00e1ln\u011b adresovateln\u00e9 po\u010d\u00edtadlo \u010dasu z roku 2038 na rok 2106.\n<li class=\"l\"> Opraveny zranitelnosti:\n<ul>\n<li class=\"l\"> CVE-2024-2961 \u2014 p\u0159ete\u010den\u00ed z\u00e1sobn\u00edku p\u0159i p\u0159evodu specificky form\u00e1tovan\u00fdch \u0159et\u011bzc\u016f v k\u00f3dov\u00e1n\u00ed ISO-2022-CN-EXT funkc\u00ed iconv(). Ve skute\u010dnosti m\u016f\u017ee b\u00fdt zranitelnost vyu\u017eita pro vzd\u00e1len\u00fd \u00fatok na aplikace PHP, co\u017e povede k proveden\u00ed k\u00f3du.\n<li class=\"l\"> CVE-2024-33599 \u2014 p\u0159ete\u010den\u00ed z\u00e1sobn\u00edku v k\u00f3du pro pr\u00e1ci s mezipam\u011bt\u00ed netgroup b\u011bhem procesu nscd (Name Service Cache Daemon). Zranitelnost m\u016f\u017ee b\u00fdt zneu\u017eita zasl\u00e1n\u00edm speci\u00e1ln\u011b form\u00e1tovan\u00e9ho po\u017eadavku od klienta.\n<li class=\"l\"> CVE-2024-33600 \u2014 dereference nulov\u00e9ho ukazatele v procesu nscd, co\u017e m\u016f\u017ee v\u00e9st k hav\u00e1rii p\u0159i zpracov\u00e1n\u00ed ur\u010dit\u00fdch po\u017eadavk\u016f.\n<li class=\"l\"> CVE-2024-33601 \u2014 chyba p\u0159i pr\u00e1ci s mezipam\u011bt\u00ed netgroup m\u016f\u017ee v\u00e9st k hav\u00e1rii procesu nscd zp\u016fsoben\u00e9 selh\u00e1n\u00edm p\u0159i alokaci pam\u011bti.\n<li class=\"l\"> CVE-2024-33602 \u2014 po\u0161kozen\u00ed pam\u011bti p\u0159i pr\u00e1ci s mezipam\u011bt\u00ed netgroup v procesu nscd.      <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=61594\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0448\u0435\u0441\u0442\u0438 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 GNU C Library (glibc) 2.40, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043d\u0438\u044f\u043c \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043e\u0432 ISO C11 \u0438 POSIX.1-2017. \u0412 \u0441\u043e\u0441\u0442\u0430\u0432 \u043d\u043e\u0432\u043e\u0433\u043e \u0432\u044b\u043f\u0443\u0441\u043a\u0430 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u044b \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043e\u0442 68 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432. \u0418\u0437 \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0432 Glibc 2.40 \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0438\u0439 \u043c\u043e\u0436\u043d\u043e \u043e\u0442\u043c\u0435\u0442\u0438\u0442\u044c: \u0412 \u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043e\u0447\u043d\u044b\u0439 \u0444\u0430\u0439\u043b math.h \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u044b \u043d\u043e\u0432\u044b\u0435 \u044d\u043a\u0441\u043f\u043e\u043d\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u044b\u0435 \u0438 \u043b\u043e\u0433\u0430\u0440\u0438\u0444\u043c\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0444\u0443\u043d\u043a\u0446\u0438\u0438, \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u0435 \u0432 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0435 C23: exp2m1, exp10m1.log2p1, [&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-118103","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=\"\u041f\u043e\u0441\u043b\u0435 \u0448\u0435\u0441\u0442\u0438 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 GNU C Library (glibc) 2.40, \u043a\u043e\u0442\u043e\u0440\u0430\u044f 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