{"id":91038,"date":"2020-08-07T13:42:21","date_gmt":"2020-08-07T11:42:21","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-sistemnoj-biblioteki-glibc-2-32"},"modified":"2020-08-07T13:42:21","modified_gmt":"2020-08-07T11:42:21","slug":"vypusk-sistemnoj-biblioteki-glibc-2-32","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/vypusk-sistemnoj-biblioteki-glibc-2-32","title":{"rendered":"Vyd\u00e1n\u00ed syst\u00e9mov\u00e9 knihovny Glibc 2.32","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Po \u0161esti m\u011bs\u00edc\u00edch v\u00fdvoje <noindex><a rel=\"nofollow\" href=\"https:\/\/sourceware.org\/pipermail\/libc-announce\/2020\/000029.html\">byla vyd\u00e1na<\/a><\/noindex> vyd\u00e1n\u00ed syst\u00e9mov\u00e9 knihovny <noindex><a rel=\"nofollow\" href=\"http:\/\/ftp.gnu.org\/gnu\/glibc\/\">GNU C Library<\/a><\/noindex> (glibc) <noindex><a rel=\"nofollow\" href=\"http:\/\/sourceware.org\/glibc\/wiki\/Release\/2.32\">2.32<\/a><\/noindex>, kter\u00e1 pln\u011b vyhovuje norm\u00e1m ISO C11 a POSIX.1-2017. Nov\u00e1 verze obsahuje opravy od 67 v\u00fdvoj\u00e1\u0159\u016f. <\/p>\n<p>Zrealizov\u00e1no v Glibc 2.32 <noindex><a rel=\"nofollow\" href=\"http:\/\/sourceware.org\/git\/?p=glibc.git;a=blob_plain;f=NEWS;hb=HEAD\">vylep\u0161en\u00ed<\/a><\/noindex> m\u016f\u017eeme zm\u00ednit:\n<\/p>\n<ul>\n<li class=\"l\"> Byla p\u0159id\u00e1na podpora procesor\u016f Synopsys ARC HS (ARCv2 ISA). Pro funk\u010dnost portu je pot\u0159eba alespo\u0148 binutils 2.32, gcc 8.3 a j\u00e1dro Linux 5.1. Podporov\u00e1ny jsou t\u0159i varianty ABI arc-linux-gnu, arc-linux-gnuhf a arceb-linux-gnu (big-endian);\n<li class=\"l\"> Bylo implementov\u00e1no na\u010d\u00edt\u00e1n\u00ed modul\u016f auditu uveden\u00fdch v sekc\u00edch DT_AUDIT a<br \/>\n  DT_DEPAUDIT spustiteln\u00e9ho souboru.<\/p>\n<li class=\"l\"> Podpora typu IEEE128 long double byla implementov\u00e1na pro architekturu powerpc64le a je aktivov\u00e1na p\u0159i kompilaci s volbou &#171;-mabi=ieeolongdouble&#187;.\n<li class=\"l\"> N\u011bkter\u00e9 API jsou ozna\u010deny pomoc\u00ed atributu GCC &#8216;access&#8217;, kter\u00fd p\u0159i kompilaci v GCC 10 generuje kvalitn\u011bj\u0161\u00ed varov\u00e1n\u00ed p\u0159i ur\u010den\u00ed mo\u017en\u00fdch p\u0159ete\u010den\u00ed buffer\u016f a dal\u0161\u00edch p\u0159\u00edpad\u016f p\u0159ekro\u010den\u00ed povolen\u00fdch hranic.\n<li class=\"l\"> Pro syst\u00e9my Linux byly implementov\u00e1ny funkce pthread_attr_setsigmask_np a<br \/>\n  pthread_attr_getsigmask_np, kter\u00e9 aplikaci umo\u017e\u0148uj\u00ed specifikovat masku sign\u00e1l\u016f pro vl\u00e1kna vytvo\u0159en\u00e1 pomoc\u00ed pthread_create.<\/p>\n<li class=\"l\"> Data k\u00f3dov\u00e1n\u00ed, informace o typech znak\u016f a tabulky transliterace byly aktualizov\u00e1ny pro podporu specifikace Unicode 13.0.0;\n<li class=\"l\"> Byl p\u0159id\u00e1n nov\u00fd hlavi\u010dkov\u00fd soubor , kter\u00fd definuje prom\u011bnnou __libc_single_threaded, je\u017e m\u016f\u017ee b\u00fdt pou\u017eita v aplikac\u00edch pro optimalizace v jednovl\u00e1knov\u00fdch aplikac\u00edch.\n<li class=\"l\"> Byly p\u0159id\u00e1ny funkce sigabbrev_np a sigdescr_np, kter\u00e9 vracej\u00ed zkr\u00e1cen\u00fd n\u00e1zev a popis sign\u00e1lu (nap\u0159\u00edklad &#171;HUP&#187; a Hangup&#187; pro SIGHUP).\n<li class=\"l\"> Byly p\u0159id\u00e1ny funkce strerrorname_np a strerrordesc_np, kter\u00e9 vracej\u00ed n\u00e1zev a popis chyby (nap\u0159\u00edklad &#171;EINVAL&#187; a &#171;Invalid argument&#187; pro EINVAL).\n<li class=\"l\"> Pro platformu ARM64 byla p\u0159id\u00e1na volba &#171;&#8212;enable-standard-branch-protection&#187; (nebo -mbranch-protection=standard v GCC), kter\u00e1 aktivuje mechanismus ARMv8.5-BTI (Branch Target Indicator) pro ochranu prov\u00e1d\u011bn\u00ed instruk\u010dn\u00edch sad, na kter\u00e9 by nem\u011bly b\u00fdt prov\u00e1d\u011bny p\u0159echody p\u0159i v\u011btven\u00ed. Blokov\u00e1n\u00ed p\u0159echod\u016f na libovoln\u00e1 m\u00edsta v k\u00f3du bylo realizov\u00e1no jako protiopat\u0159en\u00ed proti vytv\u00e1\u0159en\u00ed gadget\u016f ve exploitac\u00edch, kter\u00e9 vyu\u017e\u00edvaj\u00ed techniky n\u00e1vratov\u011b orientovan\u00e9ho programov\u00e1n\u00ed (ROP &#8212; Return-Oriented Programming, \u00fato\u010dn\u00edk se nesna\u017e\u00ed um\u00edstit sv\u016fj k\u00f3d do pam\u011bti, ale operuje s ji\u017e existuj\u00edc\u00edmi kousky strojov\u00fdch instrukc\u00ed, kter\u00e9 kon\u010d\u00ed instrukc\u00ed pro n\u00e1vrat \u0159\u00edzen\u00ed, z nich\u017e skl\u00e1d\u00e1 \u0159et\u011bzec vol\u00e1n\u00ed pro z\u00edsk\u00e1n\u00ed po\u017eadovan\u00e9 funkcionality).\n<li class=\"l\"> Bylo provedeno rozs\u00e1hl\u00e9 \u010di\u0161t\u011bn\u00ed zastaral\u00fdch funkc\u00ed, v\u010detn\u011b odstran\u011bn\u00ed voleb &#171;&#8212;enable-obsolete-rpc&#187; a &#171;&#8212;enable-obsolete-nsl&#187;, hlavi\u010dkov\u00e9ho souboru &lt;sys\/sysctl.h&gt;. Byly deklarov\u00e1ny jako zastaral\u00e9 funkce sstk, siginterrupt, sigpause, sighold, sigrelse, sigignore a sigset, pole sys_siglist, _sys_siglist a sys_sigabbrev, symboly sys_errlist, _sys_errlist, sys_nerr a _sys_nerr, modul NSS hesiod.\n<li class=\"l\"> ldconfig je nyn\u00ed ve v\u00fdchoz\u00edm nastaven\u00ed p\u0159eveden na pou\u017e\u00edv\u00e1n\u00ed nov\u00e9ho form\u00e1tu ld.so.cache, kter\u00fd je podporov\u00e1n v glibc ji\u017e t\u00e9m\u011b\u0159 20 let.\n<li class=\"l\"> Opraveny zranitelnosti:\n<ul>\n<li class=\"l\"> CVE-2016-10228 &#8212; zacyklen\u00ed v utility iconv, projevuj\u00edc\u00ed se p\u0159i spu\u0161t\u011bn\u00ed s volbou &#171;-c&#187;, v p\u0159\u00edpad\u011b zpracov\u00e1n\u00ed neplatn\u00fdch v\u00edcibytn\u00fdch dat.\n<li class=\"l\"> CVE-2020-10029 &#8212; po\u0161kozen\u00ed z\u00e1sobn\u00edku p\u0159i vol\u00e1n\u00ed trigonometrick\u00fdch funkc\u00ed s pseudonulov\u00fdm argumentem.\n<li class=\"l\"> CVE-2020-1752 &#8212; p\u0159\u00edstup k oblasti pam\u011bti po jej\u00edm uvoln\u011bn\u00ed (use-after-free) ve funkci glob p\u0159i rozbalen\u00ed odkazu na domovsk\u00fd adres\u00e1\u0159 (&#171;~user&#187;) v cest\u00e1ch.\n<li class=\"l\"> CVE-2020-6096 &#8212; nespr\u00e1vn\u00e9 zpracov\u00e1n\u00ed negativn\u00edch hodnot parametru na platform\u011b ARMv7 v memcpy() a memmove(), kter\u00e9 ur\u010duje velikost kop\u00edrovan\u00e9 oblasti. <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53003\">Umo\u017e\u0148uje<\/a><\/noindex> organizovat prov\u00e1d\u011bn\u00ed k\u00f3du p\u0159i zpracov\u00e1n\u00ed v funkc\u00edch memcpy() a memmove() specifick\u00fdm zp\u016fsobem form\u00e1tovan\u00fdch dat. Je pozoruhodn\u00e9, \u017ee probl\u00e9m <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53371\">z\u016fstal<\/a><\/noindex>  neopraven\u00fd t\u00e9m\u011b\u0159 dva m\u011bs\u00edce od okam\u017eiku ve\u0159ejn\u00e9ho ozn\u00e1men\u00ed a p\u011bt m\u011bs\u00edc\u016f od upozorn\u011bn\u00ed v\u00fdvoj\u00e1\u0159\u016f Glibc.\n<\/ul>\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Zdroj: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53504\">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) 2.32, \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 67 \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 2.32 \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0438\u0439 \u043c\u043e\u0436\u043d\u043e \u043e\u0442\u043c\u0435\u0442\u0438\u0442\u044c: \u0414\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0430 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u043e\u0432 Synopsys ARC HS (ARCv2 ISA). \u0414\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u043f\u043e\u0440\u0442\u0430 \u0442\u0440\u0435\u0431\u0443\u0435\u0442\u0441\u044f \u043a\u0430\u043a \u043c\u0438\u043d\u0438\u043c\u0443\u043c binutils 2.32, [&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-91038","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\" 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