{"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\/it\/blog\/news\/vypusk-sistemnoj-biblioteki-glibc-2-40","title":{"rendered":"Rilascio della libreria di sistema Glibc 2.40","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Dopo sei mesi di sviluppo, \u00e8 stata pubblicata la versione della libreria di sistema GNU C Library (glibc) 2.40, che soddisfa completamente i requisiti degli standard ISO C11 e POSIX.1-2017. Il nuovo rilascio include correzioni da parte di 68 sviluppatori.     <\/p>\n<p>Tra i miglioramenti realizzati in Glibc 2.40 si possono notare:   <\/p>\n<ul>\n<li class=\"l\"> Nel file di intestazione math.h sono state aggiunte nuove funzioni esponenziali e logaritmiche definite nello standard C23: exp2m1, exp10m1.log2p1, log10p1 e logp1. Le funzioni sono disponibili in versioni per i tipi float, double, long double, _FloatN e _FloatNx.\n<li class=\"l\"> \u00c8 stato aggiunto il macro _ISOC23_SOURCE, che definisce l\u2019uso delle funzionalit\u00e0 proposte nello standard C23 (attualmente in Glibc \u00e8 implementata solo una parte delle funzionalit\u00e0 C23). L'uso di C23 pu\u00f2 essere attivato anche in fase di compilazione specificando nel GCC le opzioni -std=c23, -std=gnu23, -std=c2x o -std=gnu2x.\n<li class=\"l\"> \u00c8 stata aggiunta l'impostazione \u00abglibc.rtld.enable_secure\u00bb, che consente di eseguire il programma durante i test come se avesse il flag di cambio identificatore utente (setuid).\n<li class=\"l\"> Sulla piattaforma Linux, il file di intestazione epoll.h \u00e8 stato aggiornato per supportare nuovi ioctl e strutture epoll introdotte nel kernel Linux 6.9.\n<li class=\"l\"> La funzionalit\u00e0 per rilevare possibili overflow di buffer e errori di sicurezza durante l'esecuzione di funzioni che manipolano stringhe e gestiscono la memoria (\u00ab_FORTIFY_SOURCE\u00bb) \u00e8 stata adattata per la compilazione di Glibc utilizzando il compilatore Clang.\n<li class=\"l\"> Nella libreria con funzioni matematiche vettoriali (libmvec) sono state proposte implementazioni delle funzioni acosh, asinh, atanh, cbrt, cosh, erf, erfc, hypot, pow, sinh e tanh per l'architettura Aarch64.\n<li class=\"l\"> Nei sistemi x86, per accelerare la scrittura di grandi set di dati nella funzione memset, \u00e8 stata introdotta la possibilit\u00e0 di disabilitare l'uso di buffer temporanei. L'ottimizzazione si attiva tramite l'impostazione \u00abx86_memset_non_temporal_threshold\u00bb.\n<li class=\"l\"> I macro nel file di intestazione stdbit.h, che operano con diversi tipi (type-generic), sono stati convertiti, con l'uso di GCC 14, per utilizzare le funzioni incorporate __builtin_stdc_bit_ceil per supportare gli operandi con i tipi __int128 e _BitInt(N).\n<li class=\"l\"> I campi con contatore temporale epocale nelle strutture lastlog, utmp e utmpx sono stati convertiti da un tipo intero firmato a un tipo intero senza segno, consentendo di estendere il massimo tempo addressable dal 2038 al 2106.\n<li class=\"l\"> Sono state risolte le vulnerabilit\u00e0:\n<ul>\n<li class=\"l\"> CVE-2024-2961 \u2014 overflow di buffer nella conversione di stringhe formattate in modo speciale nella codifica ISO-2022-CN-EXT da parte della funzione iconv(). In pratica, la vulnerabilit\u00e0 pu\u00f2 essere sfruttata per attacchi remoti su applicazioni PHP, portando all'esecuzione di codice.\n<li class=\"l\"> CVE-2024-33599 \u2014 overflow di buffer nel codice per la gestione della cache netgroup durante il processo nscd (Name Service Cache Daemon). La vulnerabilit\u00e0 pu\u00f2 essere sfruttata inviando una richiesta formattata in modo speciale dal client.\n<li class=\"l\"> CVE-2024-33600 \u2014 dereferenziazione di un puntatore nullo nel processo nscd, che pu\u00f2 causare un arresto anomalo durante l'elaborazione di determinate richieste.\n<li class=\"l\"> CVE-2024-33601 \u2014 un errore nella gestione della cache netgroup pu\u00f2 portare a un arresto anomalo del processo nscd a causa di un fallimento nell'allocazione della memoria.\n<li class=\"l\"> CVE-2024-33602 \u2014 corruptione della memoria durante la gestione della cache netgroup nel processo nscd.      <\/ul>\n<p>Fonte: <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 5.0.1.1 - 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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