{"id":120895,"date":"2024-12-08T21:46:03","date_gmt":"2024-12-08T19:46:03","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-pozvolyayushhie-podmenit-obrazy-i-vypolnit-kod-na-asu-serverah-proekta-openwrt"},"modified":"2024-12-08T21:46:03","modified_gmt":"2024-12-08T19:46:03","slug":"uyazvimosti-pozvolyayushhie-podmenit-obrazy-i-vypolnit-kod-na-asu-serverah-proekta-openwrt","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimosti-pozvolyayushhie-podmenit-obrazy-i-vypolnit-kod-na-asu-serverah-proekta-openwrt","title":{"rendered":"Sebezhet\u0151s\u00e9gek, amelyek lehet\u0151v\u00e9 teszik a k\u00e9pek helyettes\u00edt\u00e9s\u00e9t \u00e9s k\u00f3d futtat\u00e1s\u00e1t az OpenWrt projekt ASU szerverein.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Az OpenWrt fejleszt\u00e9si projektj\u00e9ben az ASU (Attended SysUpgrade) eszk\u00f6zk\u00e9szletben kritikus sebezhet\u0151s\u00e9geket (CVE-2024-54143) fedeztek fel, amelyek lehet\u0151v\u00e9 teszik az olyan \u00f6sszeszerel\u00e9si artefaktumok kompromitt\u00e1l\u00e1s\u00e1t, amelyeket a sysupgrade.openwrt.org szolg\u00e1ltat\u00e1son vagy harmadik f\u00e9l ASU-szervereken terjesztenek, \u00edgy a felhaszn\u00e1l\u00f3k rendszereire jogtalanul m\u00f3dos\u00edtott firmware-k\u00e9pek telep\u00edt\u00e9s\u00e9t \u00e9rhetik el, akik az \u201eattended upgrade\u201d \u00fczemm\u00f3dban friss\u00edtik a firmware-t a selector.openwrt.org webes fel\u00fcleten vagy az attended.sysupgrade parancssori eszk\u00f6z t\u00e1mogat\u00e1s\u00e1val.     <\/p>\n<p>A t\u00e1mad\u00e1s sikeres v\u00e9grehajt\u00e1s\u00e1hoz a t\u00e1mad\u00f3nak elegend\u0151 csomag\u00e9p\u00edt\u00e9si k\u00e9r\u00e9s k\u00fcld\u00e9se az ASU szerver fel\u00e9 (az ilyen k\u00e9rd\u00e9seket b\u00e1rmely felhaszn\u00e1l\u00f3 k\u00fcldheti autentik\u00e1ci\u00f3 n\u00e9lk\u00fcl). Egy speci\u00e1lisan megform\u00e1zott csomaglista manipul\u00e1l\u00e1s\u00e1val a t\u00e1mad\u00f3 k\u00e9pes kor\u00e1bban gener\u00e1lt rosszindulat\u00fa k\u00e9pek k\u00fcld\u00e9s\u00e9re m\u00e1s felhaszn\u00e1l\u00f3k \u00e9rv\u00e9nyes \u00e9p\u00edt\u00e9si k\u00e9r\u00e9seire v\u00e1laszul.        <\/p>\n<p>Az ASU szolg\u00e1ltat\u00e1s az OpenWrt-ban a firmware friss\u00edt\u00e9sek gener\u00e1l\u00e1s\u00e1ra \u00e9s telep\u00edt\u00e9s\u00e9re szolg\u00e1l a megl\u00e9v\u0151 be\u00e1ll\u00edt\u00e1sok \u00e9s a felhaszn\u00e1l\u00f3 \u00e1ltal telep\u00edtett csomagok elveszt\u00e9se n\u00e9lk\u00fcl. A felhaszn\u00e1l\u00f3 a webes fel\u00fcleten vagy parancssori eszk\u00f6z\u00f6n kereszt\u00fcl k\u00e9r\u00e9s\u00e9t k\u00fcldi a friss\u00edtett firmware k\u00e9p\u00e9nek gener\u00e1l\u00e1s\u00e1ra, megadva a rendszer\u00e9ben telep\u00edtett csomagokat. Egy id\u0151 ut\u00e1n az ASU szerver l\u00e9trehozza a megrendelt tartalomnak megfelel\u0151 k\u00e9pet, amelyet a felhaszn\u00e1l\u00f3 let\u00f6lthet \u00e9s telep\u00edthet az eszk\u00f6z\u00e9re. Tov\u00e1bb\u00e1 el\u00e9rhet\u0151 egy opci\u00f3, amely lehet\u0151v\u00e9 teszi a megl\u00e9v\u0151 be\u00e1ll\u00edt\u00e1sok meg\u0151rz\u00e9s\u00e9t az \u00faj firmware-ben.       <\/p>\n<p>A felhaszn\u00e1l\u00f3kt\u00f3l \u00e9rkez\u0151 k\u00e9r\u00e9sek feldolgoz\u00e1s\u00e1\u00e9rt az ASU Server felel\u0151s, amely automatikusan gener\u00e1lja a firmware k\u00e9peket az ImageBuilder eszk\u00f6z seg\u00edts\u00e9g\u00e9vel, \u00e9s egy kor\u00e1bban elk\u00e9sz\u00edtett k\u00e9pekb\u0151l \u00e1ll\u00f3 gyors\u00edt\u00f3t\u00e1rat is fenntart. Ha a felhaszn\u00e1l\u00f3 olyan k\u00e9pet k\u00e9r, amelyet m\u00e1r kor\u00e1bban elk\u00e9sz\u00edtettek, <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hu\/server\/dts-newyork\/\"   title=\"szerveren\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2797\">szerveren<\/a> \u00e9s amelynek relevanci\u00e1ja megmaradt, a rendszer azonnal szolg\u00e1ltatja a gyors\u00edt\u00f3t\u00e1rban tal\u00e1lhat\u00f3 k\u00e9pet an\u00e9lk\u00fcl, hogy elind\u00edtan\u00e1 az \u00e9p\u00edt\u00e9si folyamatot.    <\/p>\n<p>A t\u00e1mad\u00e1s viselked\u00e9se k\u00e9t sebezhet\u0151s\u00e9gnek k\u00f6sz\u00f6nhet\u0151en v\u00e1lt lehet\u0151v\u00e9:  <\/p>\n<ul>\n<li class=\"l\"> Az Imagebuilder eszk\u00f6zk\u00e9szlet build_reques.py k\u00e9r\u00e9skezel\u0151j\u00e9ben felfedezett sebezhet\u0151s\u00e9get kihaszn\u00e1lva t\u00e1mad\u00f3k saj\u00e1t parancsaikat helyezhetik be az \u00f6sszes\u00edt\u00e9si folyamatba, ha a felhaszn\u00e1l\u00f3 k\u00fcl\u00f6nlegesen megform\u00e1zott csomagn\u00e9vvel adja meg azokat. A sebezhet\u0151s\u00e9g oka a speci\u00e1lis karakterek megfelel\u0151 ellen\u0151rz\u00e9s\u00e9nek hi\u00e1nya a csomagnevekben, miel\u0151tt azokat a make utility argumentumaik\u00e9nt felhaszn\u00e1ln\u00e1k. Ennek a sebezhet\u0151s\u00e9gnek a kihaszn\u00e1l\u00e1s\u00e1val a t\u00e1mad\u00f3 rosszindulat\u00fa firmware k\u00e9peket k\u00e9pezhet a szerveren, amelyek helyes \u00f6sszes\u00edt\u0151 kulccsal vannak al\u00e1\u00edrva.\n<li class=\"l\"> A util.py k\u00f6nyvt\u00e1rban l\u00e9v\u0151 sebezhet\u0151s\u00e9g a SHA-256 hashek miatt l\u00e9pett fel, amelyeket a m\u00e1r k\u00e9szen \u00e1ll\u00f3 firmware-k\u00e9pek gyors\u00edt\u00f3t\u00e1rban val\u00f3 ellen\u0151rz\u00e9s\u00e9re haszn\u00e1ltak, mivel a hashek 12 karakterre lettek ler\u00f6vid\u00edtve, ami jelent\u0151sen cs\u00f6kkentette az entr\u00f3pia szintet, \u00e9s lehet\u0151v\u00e9 tette a t\u00e1mad\u00f3 sz\u00e1m\u00e1ra, hogy \u00fctk\u00f6z\u00e9sek keres\u00e9s\u00e9vel rosszindulat\u00fa k\u00e9pet alak\u00edtson ki, amelynek hash-je megegyezett a jogos k\u00e9ppel. Az Imagebuilder-ben tal\u00e1lhat\u00f3 sebezhet\u0151s\u00e9ggel kombin\u00e1lva a hash-ek probl\u00e9m\u00e1it a t\u00e1mad\u00f3 kihaszn\u00e1lhatta az ASU Server gyors\u00edt\u00f3t\u00e1r\u00e1nak \u201eszennyez\u00e9s\u00e9re\u201d, \u00e9s rosszindulat\u00fa k\u00e9peket helyezhetett el benne, amelyeket a norm\u00e1l felhaszn\u00e1l\u00f3k k\u00e9relmeire adtak vissza.    <\/ul>\n<p>A t\u00e1mad\u00e1sok lehet\u0151s\u00e9g\u00e9t okoz\u00f3 v\u00e1ltoztat\u00e1sokat j\u00falius 8-\u00e1n hajtott\u00e1k v\u00e9gre. A probl\u00e9m\u00e1t december 4-\u00e9n orvosolt\u00e1k. Az ASU szolg\u00e1ltat\u00e1s m\u0171k\u00f6d\u00e9s\u00e9hez k\u00fcl\u00f6n\u00e1ll\u00f3, <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hu\/server\/\"   title=\"szerverek\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1974\">szerverek<\/a>, a projekt f\u0151bb \u00f6sszes\u00edt\u00e9si rendszereivel nem \u00e1tfed\u00e9sben lev\u0151, az OpenWrt Buildbot-t\u00f3l elz\u00e1rva tartott rendszereket haszn\u00e1ltak, amelyek nem rendelkeznek hozz\u00e1f\u00e9r\u00e9ssel olyan bizalmas er\u0151forr\u00e1sokhoz, mint p\u00e9ld\u00e1ul az SSH kulcsok \u00e9s a digit\u00e1lis al\u00e1\u00edr\u00e1sok kialak\u00edt\u00e1s\u00e1hoz sz\u00fcks\u00e9ges tan\u00fas\u00edtv\u00e1nyok.     <\/p>\n<p>Az OpenWrt fejleszt\u0151i \u00e1ll\u00edtj\u00e1k, hogy nem tal\u00e1ltak nyomokat a projekt infrastrukt\u00far\u00e1j\u00e1nak kompromitt\u00e1l\u00e1s\u00e1ra, m\u00e9gis biztos\u00edt\u00e1si okokb\u00f3l az \u00f6sszes\u00edt\u00e9si folyamat sor\u00e1n haszn\u00e1lt rendszerek \u00fajratelep\u00edt\u00e9se mellett d\u00f6nt\u00f6ttek. A probl\u00e9ma nem \u00e9rintette a downloads.openwrt.org webhelyen terjesztett hivatalos k\u00e9peket, \u00e9s az \u00f6sszes\u00edt\u00e9si napl\u00f3elemz\u00e9s sor\u00e1n nem tal\u00e1ltak nyomokat rosszindulat\u00fa k\u00e9r\u00e9sek k\u00fcld\u00e9s\u00e9re. Mivel az ASU szervereken automatikus di\u00e9t\u00e1z\u00e1s t\u00f6rt\u00e9nik 7 napn\u00e1l r\u00e9gebbi \u00f6sszes\u00edt\u00e9sek eset\u00e9n, a kor\u00e1bbi \u00f6sszes\u00edt\u00e9sek audit\u00e1l\u00e1sa lehetetlenn\u00e9 v\u00e1lt.       <\/p>\n<p>Az OpenWrt k\u00e9pvisel\u0151i szerint a felfedezett sebezhet\u0151s\u00e9gek gyakorlati kihaszn\u00e1l\u00e1s\u00e1nak val\u00f3sz\u00edn\u0171s\u00e9ge, hogy rosszindulat\u00fa k\u00e9pek terjeszt\u00e9s\u00e9re haszn\u00e1lj\u00e1k az OpenWrt infrastrukt\u00far\u00e1j\u00e1n kereszt\u00fcl, k\u00f6zel null\u00e1hoz k\u00f6zel\u00edt, azonban az ASU felhaszn\u00e1l\u00f3knak aj\u00e1nlott, hogy eszk\u00f6zeiken cser\u00e9lj\u00e9k le az OpenWrt firmware-t ugyanarra a verzi\u00f3ra.<br \/>\n<br \/>Forr\u00e1s: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=62371\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u043c \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u043c OpenWrt \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0438 ASU (Attended SysUpgrade) \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2024-54143), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u0441\u043a\u043e\u043c\u043f\u0440\u043e\u043c\u0435\u0442\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0441\u0431\u043e\u0440\u043e\u0447\u043d\u044b\u0435 \u0430\u0440\u0442\u0435\u0444\u0430\u043a\u0442\u044b, \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u043c\u044b\u0435 \u0447\u0435\u0440\u0435\u0437 \u0441\u0435\u0440\u0432\u0438\u0441 sysupgrade.openwrt.org \u0438\u043b\u0438 \u0441\u0442\u043e\u0440\u043e\u043d\u043d\u0438\u0435 ASU-\u0441\u0435\u0440\u0432\u0435\u0440\u044b, \u0438 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0438 \u043c\u043e\u0434\u0438\u0444\u0438\u0446\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u043e\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u0432 \u043f\u0440\u043e\u0448\u0438\u0432\u043e\u043a \u043d\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u044e\u0449\u0438\u0445 \u0434\u043b\u044f \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0448\u0438\u0432\u043e\u043a \u0440\u0435\u0436\u0438\u043c &#171;attended upgrade&#187; \u0447\u0435\u0440\u0435\u0437 web-\u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441 selector.openwrt.org \u0438\u043b\u0438 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0439 \u043a\u043e\u043c\u0430\u043d\u0434\u043d\u043e\u0439 \u0441\u0442\u0440\u043e\u043a\u0438 attended.sysupgrade. \u0414\u043b\u044f \u0443\u0441\u043f\u0435\u0448\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u0430\u0442\u0430\u043a\u0438 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u0443 \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u043e\u0442\u043f\u0440\u0430\u0432\u0438\u0442\u044c [&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-120895","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 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u043c \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u043c OpenWrt \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0438 ASU (Attended SysUpgrade) \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2024-54143), 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