{"id":181665,"date":"2026-05-22T18:24:54","date_gmt":"2026-05-22T16:24:54","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vo-freebsd-ustraneno-4-uyazvimosti-pozvolyayushhie-podnyat-privilegii-i-odna-udalyonnaya-root-uyazvimost"},"modified":"2026-05-22T18:24:54","modified_gmt":"2026-05-22T16:24:54","slug":"vo-freebsd-ustraneno-4-uyazvimosti-pozvolyayushhie-podnyat-privilegii-i-odna-udalyonnaya-root-uyazvimost","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/vo-freebsd-ustraneno-4-uyazvimosti-pozvolyayushhie-podnyat-privilegii-i-odna-udalyonnaya-root-uyazvimost","title":{"rendered":"Ve FreeBSD bylo odstran\u011bno 4 zranitelnosti, kter\u00e9 umo\u017e\u0148ovaly zv\u00fd\u0161en\u00ed privilegi\u00ed, a jedna vzd\u00e1len\u00e1 root zranitelnost","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Ve FreeBSD bylo odstran\u011bno 7 zranitelnost\u00ed, z nich\u017e jedna umo\u017e\u0148uje vzd\u00e1len\u00e9 spu\u0161t\u011bn\u00ed k\u00f3du s pr\u00e1vy roota a \u010dty\u0159i zvy\u0161uj\u00ed u\u017eivatelsk\u00e9 privilegium v syst\u00e9mu. Zranitelnosti byly opraveny v aktualizac\u00edch FreeBSD 15.0-RELEASE-p9, 14.4-RELEASE-p5 a 14.3-RELEASE-p14. <\/p>\n<ul>\n<li class=\"l\"> CVE-2026-45255 \u2013 v instal\u00e1toru bsdinstall a konfigura\u010dn\u00edm n\u00e1stroji bsdconfig chyb\u011blo escapov\u00e1n\u00ed speci\u00e1ln\u00edch znak\u016f v shellov\u00e9m skriptu, kter\u00fd u\u017eivateli zobrazuje seznam dostupn\u00fdch bezdr\u00e1tov\u00fdch s\u00edt\u00ed ur\u010den\u00fdch na z\u00e1klad\u011b skenov\u00e1n\u00ed. \u00dato\u010dn\u00edk m\u016f\u017ee vytvo\u0159it fale\u0161n\u00fd p\u0159\u00edstupov\u00fd bod a p\u0159i\u0159adit speci\u00e1ln\u011b form\u00e1tovan\u00fd identifik\u00e1tor s\u00edt\u011b (SSID), kter\u00fd obsahuje provediteln\u00e9 shellov\u00e9 konstrukce (nap\u0159\u00edklad \u201etest`id`\u201c). P\u0159i vyvol\u00e1n\u00ed funkce vyhled\u00e1v\u00e1n\u00ed bezdr\u00e1tov\u00fdch s\u00edt\u00ed u\u017eivatelsk\u00fdm po\u017eadavkem budou p\u0159edlo\u017een\u00e9 shellov\u00e9 p\u0159\u00edkazy \u00fato\u010dn\u00edka provedeny na syst\u00e9mu u\u017eivatele s pr\u00e1vy root (pro v\u00fdb\u011br nebo p\u0159ipojen\u00ed k s\u00edti \u00fato\u010dn\u00edka nen\u00ed pot\u0159eba, sta\u010d\u00ed pouze iniciovat skenov\u00e1n\u00ed s\u00edt\u00ed).\n<li class=\"l\"> CVE-2026-45250 \u2013 p\u0159ete\u010den\u00ed z\u00e1sobn\u00edku v syst\u00e9mov\u00e9m vol\u00e1n\u00ed setcred, kter\u00e9 umo\u017e\u0148uje m\u00edstn\u00edmu neopr\u00e1vn\u011bn\u00e9mu u\u017eivateli prov\u00e9st sv\u016fj k\u00f3d na \u00farovni j\u00e1dra. Probl\u00e9m je zp\u016fsoben nespr\u00e1vnou kontrolou velikosti dat um\u00edst\u011bn\u00fdch do vyrovn\u00e1vac\u00ed pam\u011bti \u2013 m\u00edsto \u201esizeof(gid_t)\u201c bylo uvedeno \u201esizeof(*groups)\u201c. Pro p\u0159\u00edstup k syst\u00e9mov\u00e9mu vol\u00e1n\u00ed setcred jsou pot\u0159eba vy\u0161\u0161\u00ed privilegium, ale zranitelnost je p\u0159\u00edtomna v k\u00f3du po\u010d\u00e1te\u010dn\u00edho kop\u00edrov\u00e1n\u00ed z p\u0159edan\u00e9ho seznamu skupin do samostatn\u00e9 vyrovn\u00e1vac\u00ed pam\u011bti prov\u00e1d\u011bn\u00e9ho p\u0159ed kontrolou privilegovan\u00fdch pr\u00e1v.\n<li class=\"l\"> CVE-2026-45251 \u2013 p\u0159\u00edstup k ji\u017e uvoln\u011bn\u00e9 pam\u011bti (use-after-free) v syst\u00e9mov\u00fdch vol\u00e1n\u00edch select a poll, kter\u00e9 nast\u00e1v\u00e1, kdy\u017e je p\u0159edan\u00fd deskriptor souboru uzav\u0159en d\u0159\u00edve, ne\u017e je uvoln\u011bn\u00fd vl\u00e1kno \u010dekaj\u00edc\u00ed na deskriptory soubor\u016f ze syst\u00e9mov\u00fdch vol\u00e1n\u00ed select a poll. \u00dasp\u011b\u0161n\u00e9 vyu\u017eit\u00ed umo\u017e\u0148uje neopr\u00e1vn\u011bn\u00e9mu u\u017eivateli prov\u00e9st k\u00f3d na \u00farovni j\u00e1dra.\n<li class=\"l\"> CVE-2026-45253 \u2013 nedostate\u010dn\u00e9 ov\u011b\u0159en\u00ed parametr\u016f p\u0159edan\u00fdch ve syst\u00e9mov\u00e9m vol\u00e1n\u00ed ptrace p\u0159i vykon\u00e1v\u00e1n\u00ed operace PT_SC_REMOTE. Zranitelnost umo\u017e\u0148uje neopr\u00e1vn\u011bn\u00e9mu u\u017eivateli zorganizovat prov\u00e1d\u011bn\u00ed libovoln\u00e9ho k\u00f3du v j\u00e1d\u0159e, i kdy\u017e c\u00edlov\u00fd lad\u011bn\u00fd proces nem\u00e1 zvl\u00e1\u0161tn\u00ed privilegium.\n<li class=\"l\"> CVE-2026-39461 \u2014 p\u0159ete\u010den\u00ed z\u00e1sobn\u00edku v knihovn\u011b libcasper, kter\u00e1 poskytuje aplikac\u00edm izolovan\u00fdm mechanismem Capsicum p\u0159\u00edstup k syst\u00e9mov\u00fdm rozhran\u00edm. P\u0159i interakci s obsluhou p\u0159es UNIXov\u00e9 sokety knihovna pou\u017e\u00edv\u00e1 syst\u00e9mov\u00fd hovor select k \u010dek\u00e1n\u00ed na p\u0159\u00edchoz\u00ed data, ale nekontroluje, zda je deskriptor soketu v souladu s aktu\u00e1ln\u00edm limitem FD_SETSIZE (1024). \u00dato\u010dn\u00edk m\u016f\u017ee iniciovat alokaci velk\u00fdch souborov\u00fdch deskriptor\u016f v aplikaci zalo\u017een\u00e9 na libcasper a vyvolat p\u0159ete\u010den\u00ed z\u00e1sobn\u00edku. P\u0159i takov\u00fdch manipulac\u00edch s programy setuid root lze dos\u00e1hnout spu\u0161t\u011bn\u00ed k\u00f3du s pr\u00e1vy root.\n<li class=\"l\"> CVE-2026-45254 \u2014 mo\u017enost obch\u00e1zet limity cap_net v aplikaci kv\u016fli tomu, \u017ee chyb\u011bj\u00edc\u00ed kl\u00ed\u010d je pova\u017eov\u00e1n za \u201eallow any\u201c m\u00edsto blokov\u00e1n\u00ed.\n<li class=\"l\"> CVE-2026-45252 \u2014 p\u0159ete\u010den\u00ed vyrovn\u00e1vac\u00ed pam\u011bti v modulu fusefs p\u0159i zpracov\u00e1n\u00ed zpr\u00e1v FUSE_LISTXATTR, kter\u00e9 umo\u017e\u0148uje p\u0159e\u010d\u00edst a\u017e 253 bajt\u016f z oblasti pam\u011bti j\u00e1dra mimo vyrovn\u00e1vac\u00ed pam\u011b\u0165, nebo zapsat a\u017e 250 bajt\u016f do nevyu\u017e\u00edvan\u00e9 \u010d\u00e1sti haldy.\n<\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=65497\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u043e FreeBSD \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043e 7 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u0438\u0437 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043e\u0434\u043d\u0430 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root, \u0430 \u0447\u0435\u0442\u044b\u0440\u0435 \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0432 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f\u0445 FreeBSD 15.0-RELEASE-p9, 14.4-RELEASE-p5 \u0438 14.3-RELEASE-p14. CVE-2026-45255 &#8212; \u0432 \u0438\u043d\u0441\u0442\u0430\u043b\u043b\u044f\u0442\u043e\u0440\u0435 bsdinstall \u0438 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0442\u043e\u0440\u0435 bsdconfig \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u043e\u0432\u0430\u043b\u043e \u044d\u043a\u0440\u0430\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0441\u043f\u0435\u0446\u0441\u0438\u043c\u0432\u043e\u043b\u043e\u0432 \u0432 shell-\u0441\u043a\u0440\u0438\u043f\u0442\u0435, \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u044e\u0449\u0435\u043c \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u0441\u043f\u0438\u0441\u043e\u043a \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u044b\u0445 \u0434\u043b\u044f \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u0431\u0435\u0441\u043f\u0440\u043e\u0432\u043e\u0434\u043d\u044b\u0445 \u0441\u0435\u0442\u0435\u0439, \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u0445 \u0432 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0435 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-181665","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=\"\u0412\u043e FreeBSD \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043e 7 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u0438\u0437 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043e\u0434\u043d\u0430 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 \u0441 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