{"id":172753,"date":"2026-05-19T18:24:36","date_gmt":"2026-05-19T16:24:36","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/pintheft-shestaya-uyazvimost-klassa-copy-fail-predostavlyayushhaya-prava-root-v-linux"},"modified":"2026-05-19T18:24:36","modified_gmt":"2026-05-19T16:24:36","slug":"pintheft-shestaya-uyazvimost-klassa-copy-fail-predostavlyayushhaya-prava-root-v-linux","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/pintheft-shestaya-uyazvimost-klassa-copy-fail-predostavlyayushhaya-prava-root-v-linux","title":{"rendered":"PinTheft \u2014 a m\u00e1sodik Copy Fail oszt\u00e1ly\u00fa sebezhet\u0151s\u00e9g, amely root jogokat biztos\u00edt Linuxban","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Nyilv\u00e1noss\u00e1gra ker\u00fclt a hatodik sebezhet\u0151s\u00e9g inform\u00e1ci\u00f3ja (1, 2-3, 4, 5), amely lehet\u0151v\u00e9 teszi, hogy egy nem privilegiz\u00e1lt helyi felhaszn\u00e1l\u00f3 root jogokat szerezzen, ha adatokat \u00edr fel\u00fcl az oldal gyors\u00edt\u00f3t\u00e1r\u00e1ban. A sebezhet\u0151s\u00e9g k\u00f3dneve PinTheft. Kaphat\u00f3 egy protot\u00edpus exploit. A CVE-azonos\u00edt\u00f3 m\u00e9g nem lett hozz\u00e1rendelve. A jav\u00edt\u00e1s egyel\u0151re csak egy patch form\u00e1j\u00e1ban \u00e9rhet\u0151 el, amely m\u00e1jus 5-\u00e9n ker\u00fclt kiad\u00e1sra, \u00e9s m\u00e1jus 11-\u00e9n fogadt\u00e1k el a netdev szakaszba, de nem ker\u00fclt be a kernel friss\u00edt\u00e9sekbe. <\/p>\n

A sebezhet\u0151s\u00e9g a RDS (Reliable Datagram Sockets) h\u00e1l\u00f3zati protokoll megval\u00f3s\u00edt\u00e1s\u00e1ban tal\u00e1lhat\u00f3, amelyet magas sebess\u00e9g\u0171 \u00fczenetv\u00e1lt\u00e1sra terveztek a klaszter csom\u00f3pontjai k\u00f6z\u00f6tt, minim\u00e1lis k\u00e9sleked\u00e9ssel \u00e9s garant\u00e1lt k\u00e9zbes\u00edt\u00e9ssel. A t\u00e1mad\u00e1s olyan rendszerekre lehets\u00e9ges, ahol az io_uring (io_uring_disabled=0) alrendszer be van kapcsolva, \u00e9s a kernel CONFIG_RDS, CONFIG_RDS_TCP \u00e9s CONFIG_IO_URING opci\u00f3kkal van \u00f6ssze\u00e1ll\u00edtva. Az exploit m\u0171k\u00f6d\u00e9s\u00e9hez olvashat\u00f3 SUID-root jelz\u00e9s\u0171 v\u00e9grehajthat\u00f3 f\u00e1jlra van sz\u00fcks\u00e9g a rendszeren. <\/p>\n

Az rds_tcp kernelmodul automatikus bet\u00f6lt\u00e9s\u00e9hez az exploit az RDS-hez t\u00f6rt\u00e9n\u0151 adatk\u00fcld\u00e9st k\u00e9ri a SO_RDS_TRANSPORT=2 sz\u00e1ll\u00edt\u00f3 haszn\u00e1lat\u00e1val. Megjegyzend\u0151, hogy a tesztelt Linux disztrib\u00faci\u00f3k k\u00f6z\u00fcl az alap\u00e9rtelmezett konfigur\u00e1ci\u00f3val a rds kernelmodul csak az Arch Linux-ban \u00e9rhet\u0151 el. A s\u00e9r\u00fcl\u00e9kenys\u00e9g megker\u00fcl\u00e9s\u00e9hez le lehet tiltani az rds \u00e9s rds_tcp kernel modulok automatikus bet\u00f6lt\u00e9s\u00e9t: rmmod rds_tcp rds printf 'install rds \/bin\/false\ninstall rds_tcp \/bin\/false\n' > \/etc\/modprobe.d\/pintheft.conf <\/p>\n

A s\u00e9r\u00fcl\u00e9kenys\u00e9get a zerocopy mechanizmus\u00e1nak hib\u00e1s megval\u00f3s\u00edt\u00e1sa okozza az rds_message_zcopy_from_user() f\u00fcggv\u00e9nyben, amely k\u00f6zvetlen\u00fcl m\u00f3dos\u00edtja az adatokat az oldalk\u00e9szletben a felesleges pufferez\u00e9s elker\u00fcl\u00e9se \u00e9rdek\u00e9ben. Ha hiba l\u00e9pett fel, a rm->data.op_nents mez\u0151 tiszt\u00edt\u00e1sa nem t\u00f6rt\u00e9nt meg, ami kett\u0151s felszabad\u00edt\u00e1st (double-free) okozott. A hib\u00e1s hivatkoz\u00e1ssz\u00e1m \u00e1ltal el\u0151id\u00e9zett helytelen \u00e9rt\u00e9k kihaszn\u00e1lhat\u00f3 volt az adatok fel\u00fcl\u00edr\u00e1s\u00e1ra az oldalk\u00e9szletben, k\u00f6sz\u00f6nhet\u0151en az io_uring fix pufferszerkezet\u00e9re mutat\u00f3 mutat\u00f3 manipul\u00e1l\u00e1s\u00e1nak. <\/p>\n

A t\u00f6bbi, e klasszhoz tartoz\u00f3 s\u00e9r\u00fcl\u00e9kenys\u00e9ghez hasonl\u00f3an az exploit mechanizmusa is tipikus \u2014 a t\u00e1mad\u00f3 el\u00e9rte, hogy a programf\u00e1jl suid root jelz\u00e9ssel az oldalk\u00e9szletben maradjon, majd k\u00f3dot helyezett az ELF fejl\u00e9cbe az \/usr\/bin\/sh ind\u00edt\u00e1s\u00e1ra. E manipul\u00e1ci\u00f3 ut\u00e1n a program ind\u00edt\u00e1sa nem az eredeti v\u00e9grehajthat\u00f3 f\u00e1jl bet\u00f6lt\u00e9s\u00e9t eredm\u00e9nyezi a t\u00e1rol\u00f3b\u00f3l, hanem a m\u00f3dos\u00edtott m\u00e1solat\u00e1t az oldalk\u00e9szletb\u0151l. A kor\u00e1bbi exploitokkal ellent\u00e9tben az \u00faj v\u00e1ltozat kiz\u00e1r\u00f3lag a 'su' seg\u00e9dprogram ellen t\u00e1mad, de alkalmazhat\u00f3 olyan suid programok eset\u00e9n is, mint a mount, passwd, chsh, newgrp, umount \u00e9s pkexec.
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0420\u0430\u0441\u043a\u0440\u044b\u0442\u0430 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e \u0448\u0435\u0441\u0442\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (1, 2-3, 4, 5), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c\u0443 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043f\u0440\u0430\u0432\u0430 root, \u043f\u0435\u0440\u0435\u0437\u0430\u043f\u0438\u0441\u0430\u0432 \u0434\u0430\u043d\u043d\u044b\u0435 \u0432 \u0441\u0442\u0440\u0430\u043d\u0438\u0447\u043d\u043e\u043c \u043a\u044d\u0448\u0435. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u043e\u043b\u0443\u0447\u0438\u043b\u0430 \u043a\u043e\u0434\u043e\u0432\u043e\u0435 \u0438\u043c\u044f PinTheft. \u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043f\u0440\u043e\u0442\u043e\u0442\u0438\u043f \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442\u0430. CVE-\u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440 \u0435\u0449\u0451 \u043d\u0435 \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d. \u0418\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u043e\u043a\u0430 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u043e \u0442\u043e\u043b\u044c\u043a\u043e \u0432 \u0432\u0438\u0434\u0435 \u043f\u0430\u0442\u0447\u0430, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d 5 \u043c\u0430\u044f \u0438 11 \u043c\u0430\u044f \u0431\u044b\u043b \u043f\u0440\u0438\u043d\u044f\u0442\u0432 \u0432\u0435\u0442\u043a\u0443 netdev, \u043d\u043e \u043d\u0435 \u0432\u043a\u043b\u044e\u0447\u0451\u043d \u0432 […]<\/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-172753","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\udd47PinTheft \u2014 a Copy Fail \u00e9r\u00e9si oszt\u00e1ly hatodik s\u00e9r\u00fcl\u00e9kenys\u00e9ge, amely root jogokat biztos\u00edt Linuxon | ProHoster","description":"Felt\u00e1rt\u00e1k a hatodik s\u00e9r\u00fcl\u00e9kenys\u00e9get (1, 2-3, 4, 5), amely lehet\u0151v\u00e9 teszi a nem privil\u00e9giz\u00e1lt helyi felhaszn\u00e1l\u00f3 sz\u00e1m\u00e1ra, hogy root jogokat szerezzen az\u00e1ltal, hogy fel\u00fcl\u00edrja az adatokat az oldali gyors\u00edt\u00f3t\u00e1rban.","canonical_url":"https:\/\/prohoster.info\/hu\/blog\/news\/pintheft-shestaya-uyazvimost-klassa-copy-fail-predostavlyayushhaya-prava-root-v-linux","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"hu_HU","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47PinTheft \u2014 \u0448\u0435\u0441\u0442\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043b\u0430\u0441\u0441\u0430 Copy Fail, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0430\u044f \u043f\u0440\u0430\u0432\u0430 root \u0432 Linux | ProHoster","og:description":"\u0420\u0430\u0441\u043a\u0440\u044b\u0442\u0430 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e \u0448\u0435\u0441\u0442\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (1, 2-3, 4, 5), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c\u0443 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043f\u0440\u0430\u0432\u0430 root, \u043f\u0435\u0440\u0435\u0437\u0430\u043f\u0438\u0441\u0430\u0432 \u0434\u0430\u043d\u043d\u044b\u0435 \u0432 \u0441\u0442\u0440\u0430\u043d\u0438\u0447\u043d\u043e\u043c \u043a\u044d\u0448\u0435.","og:url":"https:\/\/prohoster.info\/hu\/blog\/news\/pintheft-shestaya-uyazvimost-klassa-copy-fail-predostavlyayushhaya-prava-root-v-linux","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2026-05-19T16:24:36+00:00","article:modified_time":"2026-05-19T16:24:36+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/172753","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/comments?post=172753"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/172753\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/media?parent=172753"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/categories?post=172753"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/tags?post=172753"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}