{"id":182448,"date":"2026-07-03T22:53:39","date_gmt":"2026-07-03T20:53:39","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-paketnom-menedzhere-guix-dopuskayushhaya-udalyonnoe-vypolnenie-koda-v-sisteme"},"modified":"2026-07-03T22:53:39","modified_gmt":"2026-07-03T20:53:39","slug":"uyazvimost-v-paketnom-menedzhere-guix-dopuskayushhaya-udalyonnoe-vypolnenie-koda-v-sisteme","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimost-v-paketnom-menedzhere-guix-dopuskayushhaya-udalyonnoe-vypolnenie-koda-v-sisteme","title":{"rendered":"Hiba a Guix csomagkezel\u0151ben, amely t\u00e1voli k\u00f3dv\u00e9grehajt\u00e1st tesz lehet\u0151v\u00e9 a rendszerben","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>A Guix csomagkezel\u0151ben ismert sebezhet\u0151s\u00e9gek (CVE nem el\u00e9rhet\u0151) tal\u00e1lhat\u00f3k a &#171;guix substitute&#187; bels\u0151 parancs megval\u00f3s\u00edt\u00e1s\u00e1ban, amelyet a guix-daemon h\u00e1tt\u00e9rfolyamat automatikusan h\u00edv meg a csomagtelep\u00edt\u00e9si m\u0171veletek v\u00e9grehajt\u00e1sa sor\u00e1n. Ez a parancs m\u00e1r el\u0151\u00e1ll\u00edtott bin\u00e1ris csomagok external szerverekt\u0151l t\u00f6rt\u00e9n\u0151 let\u00f6lt\u00e9s\u00e9re szolg\u00e1l, az integrit\u00e1suk digit\u00e1lis al\u00e1\u00edr\u00e1s alapj\u00e1n t\u00f6rt\u00e9n\u0151 ellen\u0151rz\u00e9s\u00e9vel. A legvesz\u00e9lyesebb sebezhet\u0151s\u00e9g lehet\u0151v\u00e9 teszi, hogy a t\u00e1mad\u00f3 t\u00e1volr\u00f3l k\u00f3dv\u00e9grehajt\u00e1st ind\u00edtson a felhaszn\u00e1l\u00f3 rendszer\u00e9n, azzal a joggal, amely alatt a guix-daemon h\u00e1tt\u00e9rfolyamat fut.       <\/p>\n<p>A probl\u00e9ma minden guix-daemon folyamattal rendelkez\u0151 konfigur\u00e1ci\u00f3t \u00e9rint, f\u00fcggetlen\u00fcl att\u00f3l, hogy root jogosults\u00e1ggal vagy nem privilegiz\u00e1lt felhaszn\u00e1l\u00f3k\u00e9nt fut-e. A sebezhet\u0151s\u00e9g kihaszn\u00e1l\u00e1s\u00e1hoz elegend\u0151 b\u00e1rmilyen k\u00eds\u00e9rlet a k\u00e9sz bin\u00e1ris csomagok let\u00f6lt\u00e9s\u00e9re a <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hu\/server\/dts-los-angeles\/\" title=\"a szerver\" data-wpil-keyword-link=\"linked\">a szerver<\/a>, a t\u00e1mad\u00f3 \u00e1ltal ir\u00e1ny\u00edtott helyr\u0151l. A k\u00e1rt\u00e9kony <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hu\/server\/\" title=\"szerver\" data-wpil-keyword-link=\"linked\">szerver<\/a> nem sz\u00fcks\u00e9ges, hogy kifejezetten ki legyen v\u00e1lasztva vagy meg legyen adva a felhaszn\u00e1l\u00f3i be\u00e1ll\u00edt\u00e1sokban &#8212; defini\u00e1lhat\u00f3 a &#171;&#8212;discover&#187; opci\u00f3 seg\u00edts\u00e9g\u00e9vel, amely lehet\u0151v\u00e9 teszi a szerver behelyettes\u00edt\u00e9s\u00e9t egy MITM-t\u00e1mad\u00e1s sor\u00e1n. Olyan konfigur\u00e1ci\u00f3kban, ahol a guix-daemon emelt jogokkal fut, a helyi felhaszn\u00e1l\u00f3 t\u00e1mad\u00e1st v\u00e9gezhet, ha csatlakoz\u00e1si lehet\u0151s\u00e9ge van a h\u00e1tt\u00e9rfolyamathoz Unix-socketen (Alap\u00e9rtelmez\u00e9s szerint minden felhaszn\u00e1l\u00f3 sz\u00e1m\u00e1ra el\u00e9rhet\u0151).    <\/p>\n<p>A sebezhet\u0151s\u00e9g a &#171;restore-file&#187; feldolgoz\u00f3ban tal\u00e1lhat\u00f3, amely a csomag let\u00f6lt\u00e9se k\u00f6zben v\u00e9grehajtott kicsomagol\u00e1sra szolg\u00e1l an\u00e9lk\u00fcl, hogy megv\u00e1rn\u00e1 a csomag teljes let\u00f6lt\u00e9s\u00e9t \u00e9s az archiv\u00e1lt f\u00e1jl digit\u00e1lis al\u00e1\u00edr\u00e1s szerinti ellen\u0151rz\u00e9s\u00e9t. A probl\u00e9ma a &#171;.&#187;, &#171;\\\/&#187; \u00e9s &#171;..&#187; karakterek el\u00e9rhet\u0151s\u00e9g\u00e9nek ellen\u0151rz\u00e9s\u00e9nek hi\u00e1ny\u00e1b\u00f3l fakad az arch\u00edvumban tal\u00e1lhat\u00f3 f\u00e1jlnevek \u00fatvonalain. A t\u00e1mad\u00f3 egy archiv\u00e1lt f\u00e1jl nem megfelel\u0151 nev\u00e9nek behelyettes\u00edt\u00e9s\u00e9vel tetsz\u0151leges f\u00e1jl \u00edr\u00e1s\u00e1ra k\u00e9nyszer\u00edtheti a f\u00e1jlrendszer b\u00e1rmely ter\u00fclet\u00e9re, amennyire csak megengedett a guix-daemon h\u00e1tt\u00e9rfolyamat jogai alapj\u00e1n.     <\/p>\n<p>A rendszerben t\u00f6rt\u00e9n\u0151 k\u00f3d v\u00e9grehajt\u00e1s\u00e1nak el\u0151seg\u00edt\u00e9se \u00e9rdek\u00e9ben p\u00e9ld\u00e1ul autostart szkriptet adhatunk hozz\u00e1, mint p\u00e9ld\u00e1ul &#171;~\\ .bashrc&#187; vagy ~\\ .profile, vagy m\u00f3dos\u00edthatjuk a ~\\\/ .ssh\\\/authorized_keys f\u00e1jlt SSH-kulcsokkal. Ha a guix-daemon egy t\u00f6bbfelhaszn\u00e1l\u00f3s rendszerben root felhaszn\u00e1l\u00f3k\u00e9nt fut, a t\u00e1mad\u00f3 fel\u00fcl\u00edrhatja a jelsz\u00f3f\u00e1jlt vagy a rendszer szkriptjeit.      <\/p>\n<p>A hamis szerverek l\u00e9trehoz\u00e1s\u00e1nak lehet\u0151s\u00e9ge a rosszindulat\u00fa csomagok terjeszt\u00e9s\u00e9re abb\u00f3l ad\u00f3dik, hogy a rendelkez\u00e9sre \u00e1ll\u00f3 bin\u00e1ris csomagok metainform\u00e1ci\u00f3inak (narinfo) let\u00f6lt\u00e9si folyamata (fetch-narinfos) nem ellen\u0151rizte a szerver tan\u00fas\u00edtv\u00e1ny\u00e1t, b\u00edzva abban, hogy a metainform\u00e1ci\u00f3k t\u00f6bbs\u00e9g\u00e9t digit\u00e1lis al\u00e1\u00edr\u00e1s hiteles\u00edti. Mint kider\u00fclt, az al\u00e1\u00edr\u00e1s nem terjedt ki a csomag let\u00f6lt\u00e9si URL-j\u00e9re, \u00edgy azt an\u00e9lk\u00fcl lehetett manipul\u00e1lni, hogy a metainform\u00e1ci\u00f3k \u00e9ps\u00e9ge s\u00e9r\u00fclt volna. V\u00e9gs\u0151 soron a hamis csomagot elutas\u00edtott\u00e1k volna, mert a digit\u00e1lis al\u00e1\u00edr\u00e1ssal hiteles\u00edtett hash ellen\u0151rz\u00e9se nem teljes\u00fclt, de ez az ellen\u0151rz\u00e9s a kib\u0151v\u00edtett\u00e9k sor\u00e1n, ahol a f\u00e1jlnevekben a speci\u00e1lis karakterekkel kapcsolatos probl\u00e9ma mer\u00fclt fel.    <\/p>\n<p>A &#171;guix substitute&#187; parancson k\u00edv\u00fcl a sebezhet\u0151 &#171;restore-file&#187; kezel\u0151 a &#171;guix offload&#187;, &#171;guix archive &#8212;extract&#187; \u00e9s &#171;guix challenge&#187; parancsokban is haszn\u00e1latban van, amelyeken kereszt\u00fcl szint\u00e9n ki lehet zs\u00e1km\u00e1nyolni a sebezhet\u0151s\u00e9get. A sebezhet\u0151s\u00e9g blokkol\u00e1s\u00e1nak ker\u00fcl\u0151 megold\u00e1sak\u00e9nt javasolt a &#171;&#8212;no-substitutes&#187; opci\u00f3 k\u00e9nyszer\u00edtett megad\u00e1sa minden guix parancsban. A sebezhet\u0151s\u00e9g jav\u00edt\u00e1sa a Guix k\u00f3dalap r\u00e9sz\u00e9v\u00e9 v\u00e1lt. A felhaszn\u00e1l\u00f3knak javasolt azonnal telep\u00edteni\u00fck a fejleszt\u0151k \u00e1ltal k\u00e9sz\u00edtett friss\u00edt\u00e9seket a guix \u00e9s guix-daemon programokhoz.    <\/p>\n<p>A Guix eml\u00edtett probl\u00e9m\u00e1ja mellett tov\u00e1bbi h\u00e1rom sebezhet\u0151s\u00e9get is megsz\u00fcntettek:   <\/p>\n<ul>\n<li class=\"l\"> A bin\u00e1ris csomagok manipul\u00e1l\u00e1s\u00e1nak lehet\u0151s\u00e9ge, mivel a fetch-narinfos kezel\u0151 nem ellen\u0151rzi a k\u00e9rt csomag \u00e9s a visszat\u00e9r\u00edtett metainform\u00e1ci\u00f3k megfelel\u0151s\u00e9g\u00e9t. A sebezhet\u0151s\u00e9g felhaszn\u00e1lhat\u00f3 a k\u00e9rt csomag elavult verzi\u00f3j\u00e1nak \u00e1tad\u00e1s\u00e1ra, amely sebezhet\u0151s\u00e9geket tartalmaz.\n<li class=\"l\"> B\u00e1rmely f\u00e1jl els\u0151 sor\u00e1nak tartalm\u00e1nak meghat\u00e1roz\u00e1sa a rendszerben egy helyi felhaszn\u00e1l\u00f3 \u00e1ltal a &#171;file:\/\/&#187; URI \u00e1tad\u00e1s\u00e1val (&#171;&#8212;substitute-urls file:\/\/etc\/shadow&#187;). Amennyiben a guix-daemon root jogosults\u00e1gokkal fut, az olvasni fogja a k\u00e9rt f\u00e1jlt, meghat\u00e1rozza, hogy az nem metainform\u00e1ci\u00f3, \u00e9s hiba\u00fczenetet ad ki, amelyben eml\u00edt\u00e9st nyer az a sor, amelyet nem siker\u00fclt elemezni.\n<li class=\"l\"> Egy speci\u00e1lisan megform\u00e1lt k\u00fcls\u0151 t\u00e1rol\u00f3 n\u00e9v (&#171;..\\\/..\\\/..\\\/..\\\/newfile&#187;) megad\u00e1sa a &#171;guix pull&#187; \u00e9s &#171;guix time-machine&#187; parancsok v\u00e9grehajt\u00e1sakor lehet\u0151v\u00e9 teszi, hogy commit inform\u00e1ci\u00f3kat tartalmaz\u00f3 adatokat \u00edrjunk egy tetsz\u0151leges l\u00e9tez\u0151 f\u00e1jlba a f\u00e1jlrendszerben, amennyiben a tartalom a Scheme nyelv sorainak list\u00e1j\u00e1ra hasonl\u00edt. A sebezhet\u0151s\u00e9g DoS-t\u00e1mad\u00e1sokra haszn\u00e1lhat\u00f3, de nem z\u00e1rhat\u00f3 ki, hogy a &#047;proc \u00e1lc\u00e1zott f\u00e1jlrendszer\u00e9nek \u00fcgyes manipul\u00e1ci\u00f3ival komolyabb rendszerm\u0171veleteket lehessen el\u00e9rni.      <\/ul>\n<p>Forr\u00e1s: <a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=65837\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043f\u0430\u043a\u0435\u0442\u043d\u043e\u043c \u043c\u0435\u043d\u0435\u0434\u0436\u0435\u0440\u0435 Guix \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE \u043d\u0435 \u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u044b) \u0432 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0435\u0439 \u043a\u043e\u043c\u0430\u043d\u0434\u044b &#171;guix substitute&#187;, \u0430\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u0432\u044b\u0437\u044b\u0432\u0430\u0435\u043c\u043e\u0439 \u0444\u043e\u043d\u043e\u0432\u044b\u043c \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u043c guix-daemon \u043f\u0440\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0438 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0438 \u043f\u0430\u043a\u0435\u0442\u043e\u0432. \u041a\u043e\u043c\u0430\u043d\u0434\u0430 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f \u0434\u043b\u044f \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 \u0443\u0436\u0435 \u0441\u043e\u0431\u0440\u0430\u043d\u043d\u044b\u0445 \u0431\u0438\u043d\u0430\u0440\u043d\u044b\u0445 \u043f\u0430\u043a\u0435\u0442\u043e\u0432 \u0441 \u0432\u043d\u0435\u0448\u043d\u0438\u0445 \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432 \u0441 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u043e\u0439 \u0438\u0445 \u0446\u0435\u043b\u043e\u0441\u0442\u043d\u043e\u0441\u0442\u0438 \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u0446\u0438\u0444\u0440\u043e\u0432\u043e\u0439 \u043f\u043e\u0434\u043f\u0438\u0441\u0438. \u041d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u043e\u043f\u0430\u0441\u043d\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u043a\u043e\u0434\u0430 \u043d\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-182448","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 \u043f\u0430\u043a\u0435\u0442\u043d\u043e\u043c \u043c\u0435\u043d\u0435\u0434\u0436\u0435\u0440\u0435 Guix \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE \u043d\u0435 \u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u044b) \u0432 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0435\u0439 \u043a\u043e\u043c\u0430\u043d\u0434\u044b &quot;guix 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