A szeptember elej\u00e9n kiadott hibajav\u00edt\u00e1sban a libnv k\u00f6nyvt\u00e1rban logikai hiba tal\u00e1lhat\u00f3, amely miatt a sebezhet\u0151s\u00e9get nem siker\u00fclt megfelel\u0151en orvosolni, \u00e9s a rendszer tov\u00e1bbra is ki volt t\u00e9ve a t\u00e1mad\u00e1soknak. A libnv k\u00f6nyvt\u00e1rat a FreeBSD projekt fejleszti, \u00e9s az alap\u00e9rtelmezett rendszerszoftverben a kulcs\/\u00e9rt\u00e9k form\u00e1tum\u00fa list\u00e1k kezel\u00e9s\u00e9re \u00e9s az interprocessz\u00e1lis kommunik\u00e1ci\u00f3 sor\u00e1n az adatok \u00e1tad\u00e1s\u00e1nak megszervez\u00e9s\u00e9re szolg\u00e1l. A k\u00f6nyvt\u00e1r az OpenZFS projekt keret\u00e9ben alkalmazott nvlist algoritmuson alapul, de a FreeBSD-hez saj\u00e1t megval\u00f3s\u00edt\u00e1st k\u00e9sz\u00edtettek, \u00edgy a sebezhet\u0151s\u00e9g az OpenZFS-t nem \u00e9rinti. <\/p>\n
A sebezhet\u0151s\u00e9g egy eg\u00e9sz sz\u00e1m t\u00falcsordul\u00e1s\u00e1b\u00f3l ered, amely a b\u00fafer kijel\u00f6l\u00e9s\u00e9t okozza, amely kisebb m\u00e9ret\u0171, mint a b\u00faferbe \u00edrt adatblokk. Az elk\u00f6vetett hiba potenci\u00e1lisan felhaszn\u00e1lhat\u00f3 a jogok emel\u00e9s\u00e9re az\u00e1ltal, hogy a kernel \u00e9s rendszers folyamatok mem\u00f3ria ter\u00fcleteit fel\u00fcl\u00edrja, p\u00e9ld\u00e1ul a libnv a libcasper-ben, amikor a privilegiz\u00e1lt \u00e9s nem privilegiz\u00e1lt k\u00f3d k\u00f6z\u00f6tt k\u00f6lcs\u00f6nhat\u00e1s t\u00f6rt\u00e9nik. A sebezhet\u0151s\u00e9g helyes jav\u00edt\u00e1sa (CVE-2024-45287) megtal\u00e1lhat\u00f3 a 14.1-RELEASE-p5, 14.0-RELEASE-p11, 13.4-RELEASE-p1 \u00e9s 13.3-RELEASE-p7 friss\u00edt\u00e9sekben, valamint jav\u00edt\u00f3csomag form\u00e1j\u00e1ban. <\/p>\n
A FreeBSD-ben szint\u00e9n jav\u00edtottak egy sebezhet\u0151s\u00e9get (CVE-2024-41721) a bhyve hipervizorban, amely potenci\u00e1lisan lehet\u0151v\u00e9 teszi a k\u00f3d v\u00e9grehajt\u00e1s\u00e1t egy, a gazda rendszer oldal\u00e1n fut\u00f3 folyamatban (\u00e1ltal\u00e1ban root jogokkal, de a Capsicum-alap\u00fa sandbox izol\u00e1lva), amikor manipul\u00e1ci\u00f3 t\u00f6rt\u00e9nik a vend\u00e9grendszeren bel\u00fcl. A sebezhet\u0151s\u00e9g az USB-vez\u00e9rl\u0151 XHCI emul\u00e1ci\u00f3j\u00e1nak k\u00f3dj\u00e1ban tal\u00e1lhat\u00f3, \u00e9s a b\u00fafer hat\u00e1rainak el\u00e9gtelen ellen\u0151rz\u00e9s\u00e9b\u0151l fakad, ami a b\u00faferen k\u00edv\u00fcli ter\u00fcletr\u0151l t\u00f6rt\u00e9n\u0151 adatok olvas\u00e1s\u00e1hoz, valamint potenci\u00e1lisan egy tetsz\u0151leges mem\u00f3ria ter\u00fcletre val\u00f3 \u00edr\u00e1shoz vezethet. A t\u00e1mad\u00e1st privilegiz\u00e1lt folyamatok futtat\u00e1s\u00e1nak lehet\u0151s\u00e9ge eset\u00e9n lehet v\u00e9grehajtani a vend\u00e9grendszeren. A sebezhet\u0151s\u00e9get a FreeBSD 14.1-RELEASE-p5, 14.0-RELEASE-p11, 13.4-RELEASE-p1 \u00e9s 13.3-RELEASE-p7 friss\u00edt\u00e9seiben orvosolt\u00e1k. <\/p>\n
Ezen k\u00edv\u00fcl megeml\u00edthet\u0151, hogy megjelentek a kor\u00e1bban felfedezett Linux kernel sebezhet\u0151s\u00e9gek, a CVE-2024-26808 \u00e9s a CVE-2024-1085, kihaszn\u00e1l\u00e1s\u00e1hoz sz\u00fcks\u00e9ges m\u00f3dszerek le\u00edr\u00e1sai \u00e9s munkaprotoypusok. A probl\u00e9m\u00e1kat a 5.10.210, 5.15.149, 6.1.76, 6.6.15, 6.7.3 \u00e9s 6.8 kernel friss\u00edt\u00e9sek orvosolt\u00e1k, \u00e9s m\u00e1r kijav\u00edtott\u00e1k a f\u0151bb disztrib\u00faci\u00f3kban (Debian, Ubuntu, RHEL, SUSE, Fedora). A sebezhet\u0151s\u00e9gek a netfilter alrendszer nft_chain_filter \u00e9s nft_setelem_catchall_deactivate funkci\u00f3iban felszabad\u00edtott mem\u00f3ria ter\u00fcletekhez val\u00f3 hozz\u00e1f\u00e9r\u00e9s k\u00f6vetkezt\u00e9ben l\u00e9pnek fel, \u00e9s lehet\u0151v\u00e9 teszik a root jogosults\u00e1g\u00fa k\u00f3d v\u00e9grehajt\u00e1s\u00e1t. A t\u00e1mad\u00e1s v\u00e9grehajt\u00e1s\u00e1hoz val\u00f3 hozz\u00e1f\u00e9r\u00e9s sz\u00fcks\u00e9ges az nftables-hez, amelyet CAP_NET_ADMIN jogokkal lehet el\u00e9rni b\u00e1rmely felhaszn\u00e1l\u00f3i n\u00e9vt\u00e9rben (user namespace) vagy h\u00e1l\u00f3zati n\u00e9vt\u00e9rben (network namespace), p\u00e9ld\u00e1ul izol\u00e1lt kont\u00e9nerekben. <\/p>\n
A kihaszn\u00e1l\u00e1sok a KernelCTF (Kernel Capture the Flag) kezdem\u00e9nyez\u00e9s r\u00e9sztvev\u0151i \u00e1ltal k\u00e9sz\u00fcltek, amely keret\u00e9ben a Google jutalmakat fizet a Linux kernelben felfedezett s\u00e9r\u00fcl\u00e9kenys\u00e9gek\u00e9rt. Eredetileg ezek a probl\u00e9m\u00e1k a kernel sz\u00e1mos lehets\u00e9ges s\u00e9r\u00fcl\u00e9kenys\u00e9ge k\u00f6z\u00e9 tartoztak - p\u00e9ld\u00e1ul a Debian 5.10-es kernelcsomagj\u00fanius havi friss\u00edt\u00e9s\u00e9ben a CVE-2024-26808 mellett tov\u00e1bbi 345 (!) potenci\u00e1lis s\u00e9r\u00fcl\u00e9kenys\u00e9g is jav\u00edt\u00e1sra ker\u00fclt. Hetente t\u00f6bb tucat \u00faj s\u00e9r\u00fcl\u00e9kenys\u00e9g ker\u00fcl azonos\u00edt\u00e1sra a kernelben, amelyek kor\u00e1bban nem voltak biztons\u00e1gi probl\u00e9mak\u00e9nt azonos\u00edtva (p\u00e9ld\u00e1ul a m\u00falt h\u00e9ten 68 s\u00e9r\u00fcl\u00e9kenys\u00e9get jel\u00f6ltek meg). \u0412 \u0432\u044b\u043f\u0443\u0449\u0435\u043d\u043d\u043e\u043c \u0432 \u043d\u0430\u0447\u0430\u043b\u0435 \u0441\u0435\u043d\u0442\u044f\u0431\u0440\u044f \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 libnv \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u043e\u0448\u0438\u0431\u043a\u0430, \u0438\u0437-\u0437\u0430 \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043d\u0435 \u0443\u0441\u0442\u0440\u0430\u043d\u044f\u043b\u0430\u0441\u044c \u0434\u043e\u043b\u0436\u043d\u044b\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c \u0438 \u0441\u0438\u0441\u0442\u0435\u043c\u0430 \u043e\u0441\u0442\u0430\u0432\u0430\u043b\u0430\u0441\u044c \u043f\u043e\u0434\u0432\u0435\u0440\u0436\u0435\u043d\u0430 \u0430\u0442\u0430\u043a\u0435. \u0411\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 libnv \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u043c FreeBSD \u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u0432 \u044f\u0434\u0440\u0435 \u0438 \u0432 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f\u0445 \u0438\u0437 \u0431\u0430\u0437\u043e\u0432\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0434\u043b\u044f \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0441\u043f\u0438\u0441\u043a\u043e\u0432 \u0432 \u0444\u043e\u0440\u043c\u0430\u0442\u0435 \u043a\u043b\u044e\u0447\/\u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u0438 \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u043f\u0440\u0438 \u043c\u0435\u0436\u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043d\u043e\u043c \u0432\u0437\u0430\u0438\u043c\u043e\u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0438. \u0411\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 […]<\/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-119988","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47 A libnv sebezhet\u0151s\u00e9ge a FreeBSD alatt \u00e9s Netfilter sebezhet\u0151s\u00e9gek a Linuxban | ProHoster","description":"Szeptember elej\u00e9n kiadott jav\u00edt\u00e1sban, amely a libnv k\u00f6nyvt\u00e1r sebezhet\u0151s\u00e9g\u00e9t orvosolta, logikai hib\u00e1t azonos\u00edtottak, ami miatt a sebezhet\u0151s\u00e9g nem lett megfelel\u0151en megsz\u00fcntetve, \u00edgy a rendszer tov\u00e1bbra is ki volt 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Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"