{"id":115207,"date":"2024-04-21T02:30:03","date_gmt":"2024-04-21T00:30:03","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-glibc-ekspluatiruemaya-cherez-skripty-na-php"},"modified":"2024-04-21T02:30:03","modified_gmt":"2024-04-21T00:30:03","slug":"uyazvimost-v-glibc-ekspluatiruemaya-cherez-skripty-na-php","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimost-v-glibc-ekspluatiruemaya-cherez-skripty-na-php","title":{"rendered":"PHP-scripten kereszt\u00fcl kihaszn\u00e1lhat\u00f3 s\u00e9r\u00fcl\u00e9kenys\u00e9g a Glibc-ban.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A s\u00e9rstandard C k\u00f6nyvt\u00e1r\u00e1ban, a Glibc-ben sebezhet\u0151s\u00e9get (CVE-2024-2961) fedeztek fel, amely puffert\u00falcsordul\u00e1shoz vezet, amikor a speci\u00e1lisan form\u00e1zott ISO-2022-CN-EXT k\u00f3dol\u00e1s\u00fa karakterl\u00e1ncokat alak\u00edtj\u00e1k \u00e1t az iconv() f\u00fcggv\u00e9nnyel. A probl\u00e9m\u00e1t felfedez\u0151 kutat\u00f3 a m\u00e1jus 10-i OffensiveCon konferenci\u00e1n sz\u00e1mol be, amelynek beharangoz\u00f3j\u00e1ban eml\u00edt\u00e9st nyer, hogy a sebezhet\u0151s\u00e9g kihaszn\u00e1lhat\u00f3 PHP nyelv\u0171 alkalmaz\u00e1sokon kereszt\u00fcl. \u00c1ll\u00edt\u00e1suk szerint a probl\u00e9ma az eg\u00e9sz PHP \u00f6kosziszt\u00e9m\u00e1t \u00e9s egyes alkalmaz\u00e1sokat \u00e9rint. <\/p>\n

Az UCS4 k\u00f3dol\u00e1s\u00fa karakterl\u00e1ncok \u00e1talak\u00edt\u00e1sakor, az RFC 1922 el\u0151\u00edr\u00e1sainak megfelel\u0151en, a k\u00f6nyvt\u00e1r bizonyos escape-karaktereket ad hozz\u00e1, amelyek kiemelik azokat a karakterl\u00e1nc-r\u00e9szeket, ahol a k\u00f3dol\u00e1s megv\u00e1ltozott. A sebezhet\u0151s\u00e9g a bels\u0151 pufferek hat\u00e1rainak helytelen ellen\u0151rz\u00e9s\u00e9b\u0151l fakad az iconv() f\u00fcggv\u00e9nyben, ami legfeljebb 4 b\u00e1jt m\u00e9ret\u0171 puffert\u00falcsordul\u00e1shoz vezethet. A pufferen k\u00edv\u00fcli \u00edr\u00e1skor fix \u00e9rt\u00e9kek, p\u00e9ld\u00e1ul ‘$+I’, ‘$+J’, ‘$+K’, ‘$+L’, ‘$+M’ \u00e9s ‘$*H’ ker\u00fclhetnek r\u00f6gz\u00edt\u00e9sre. B\u00e1r ennek a sebezhet\u0151s\u00e9gnek a kihaszn\u00e1l\u00e1sa k\u00f3d v\u00e9grehajt\u00e1s\u00e1ra val\u00f3sz\u00edn\u0171tlennek t\u0171nik, a probl\u00e9ma felfedez\u0151je szerint ez elegend\u0151 volt ahhoz, hogy t\u00f6bb protot\u00edpus exploit-ot k\u00e9sz\u00edtsenek t\u00e1voli t\u00e1mad\u00e1sokhoz PHP-alkalmaz\u00e1sok ellen, amelyek k\u00f3d v\u00e9grehajt\u00e1s\u00e1hoz vezetnek. <\/p>\n

A sebezhet\u0151s\u00e9g 2000 \u00f3ta fenn\u00e1ll, \u00e9s a Glibc 2.40-es verzi\u00f3j\u00e1ban van jav\u00edtva, amely jelenleg fejleszt\u00e9s alatt \u00e1ll. A jav\u00edt\u00e1s a Glibc 2.32 \u00e9s 2.39 k\u00f6z\u00f6tti kiad\u00e1sokhoz k\u00e9sz\u00fclt jav\u00edt\u00f3csomagok form\u00e1j\u00e1ban is el\u00e9rhet\u0151. A disztrib\u00faci\u00f3kban a sebezhet\u0151s\u00e9g jav\u00edt\u00e1s\u00e1t a k\u00f6vetkez\u0151 oldalakon lehet nyomon k\u00f6vetni: Debian, Ubuntu, Gentoo, RHEL, SUSE, Fedora, Arch.
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u043e\u0439 \u0421\u0438-\u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 Glibc \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2024-2961), \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u0431\u0443\u0444\u0435\u0440\u0430 \u043f\u0440\u0438 \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 \u0441\u0442\u0440\u043e\u043a \u0432 \u043a\u043e\u0434\u0438\u0440\u043e\u0432\u043a\u0435 ISO-2022-CN-EXT \u0444\u0443\u043d\u043a\u0446\u0438\u0435\u0439 iconv(). \u0412\u044b\u044f\u0432\u0438\u0432\u0448\u0438\u0439 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0443 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u043f\u043b\u0430\u043d\u0438\u0440\u0443\u0435\u0442 10 \u043c\u0430\u044f \u0432\u044b\u0441\u0442\u0443\u043f\u0438\u0442\u044c \u043d\u0430 \u043a\u043e\u043d\u0444\u0435\u0440\u0435\u043d\u0446\u0438\u0438 OffensiveCon \u0441 \u0434\u043e\u043a\u043b\u0430\u0434\u043e\u043c, \u0432 \u0430\u043d\u043e\u043d\u0441\u0435 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u0443\u043f\u043e\u043c\u0438\u043d\u0430\u0435\u0442\u0441\u044f \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0447\u0435\u0440\u0435\u0437 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 PHP. \u0417\u0430\u044f\u0432\u043b\u0435\u043d\u043e, \u0447\u0442\u043e \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u0435\u0442 \u0432\u0441\u044e \u044d\u043a\u043e\u0441\u0438\u0441\u0442\u0435\u043c\u0443 PHP \u0438 \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f. […]<\/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-115207","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\udd47Sebezhet\u0151s\u00e9g a Glibc-ben, amely PHP szkripteken kereszt\u00fcl kihaszn\u00e1lhat\u00f3 | ProHoster","description":"A s\u00e9rstandard C k\u00f6nyvt\u00e1r\u00e1ban, a Glibc-ben sebezhet\u0151s\u00e9get (CVE-2024-2961) fedeztek fel, amely puffert\u00falcsordul\u00e1shoz vezet, amikor a speci\u00e1lisan form\u00e1zott ISO-2022-CN-EXT k\u00f3dol\u00e1s\u00fa karakterl\u00e1ncokat alak\u00edtj\u00e1k \u00e1t az 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