{"id":105528,"date":"2022-11-12T15:36:44","date_gmt":"2022-11-12T13:36:44","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-xterm-privodyashhaya-k-vypolneniyu-koda-pri-obrabotke-opredelyonnyh-strok"},"modified":"2022-11-12T15:36:44","modified_gmt":"2022-11-12T13:36:44","slug":"uyazvimost-v-xterm-privodyashhaya-k-vypolneniyu-koda-pri-obrabotke-opredelyonnyh-strok","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimost-v-xterm-privodyashhaya-k-vypolneniyu-koda-pri-obrabotke-opredelyonnyh-strok","title":{"rendered":"Sebezhet\u0151s\u00e9g az xterm-ben, amely k\u00f3dv\u00e9grehajt\u00e1st eredm\u00e9nyez bizonyos sorok feldolgoz\u00e1sakor","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Az xterm termin\u00e1lemul\u00e1torban egy s\u00e9r\u00fcl\u00e9kenys\u00e9g (CVE-2022-45063) ker\u00fclt el\u0151, amely lehet\u0151v\u00e9 teszi shell-parancsok v\u00e9grehajt\u00e1s\u00e1t bizonyos escape-szekvenci\u00e1k feldolgoz\u00e1sakor a termin\u00e1lban. A t\u00e1mad\u00e1shoz elegend\u0151 csup\u00e1n megjelen\u00edteni egy megfelel\u0151en form\u00e1zott f\u00e1jl tartalm\u00e1t, p\u00e9ld\u00e1ul a cat parancs haszn\u00e1lat\u00e1val, vagy beilleszteni egy sort a v\u00e1g\u00f3lapr\u00f3l. printf «\e]50;i\$(touch \\\/tmp\\\/hack-like-its-1999)\a\e]50;?\a» > cve-2022-45063 cat cve-2022-45063 <\/p>\n

A probl\u00e9ma a 50-es k\u00f3d\u00fa escape-szekvencia feldolgoz\u00e1s\u00e1ban fell\u00e9p\u0151 hib\u00e1b\u00f3l ad\u00f3dik, amelyet a bet\u0171t\u00edpusok be\u00e1ll\u00edt\u00e1s\u00e1ra vagy lek\u00e9rdez\u00e9s\u00e9re haszn\u00e1lnak. Ha a k\u00e9rt bet\u0171t\u00edpus nem l\u00e9tezik, a m\u0171velet a k\u00e9r\u00e9sben megadott bet\u0171t\u00edpus nev\u00e9t adja vissza. K\u00f6zvetlen\u00fcl vez\u00e9rl\u0151 karaktereket nem lehet beilleszteni a n\u00e9vbe, de a visszaadott karakterl\u00e1nc befejezhet\u0151 a «^G» szekvenci\u00e1val, amely a zsh-ben, ha a vi m\u00f3dszer akt\u00edv, lista kib\u0151v\u00edt\u00e9si m\u0171veletet eredm\u00e9nyez, ami parancsok futtat\u00e1s\u00e1ra haszn\u00e1lhat\u00f3 an\u00e9lk\u00fcl, hogy nyomni kellene az Enter billenty\u0171t. <\/p>\n

A s\u00e9r\u00fcl\u00e9kenys\u00e9g sikeres kihaszn\u00e1l\u00e1s\u00e1hoz a felhaszn\u00e1l\u00f3nak a Zsh parancssor\u00e1t kell haszn\u00e1lnia, amelyet vi m\u00f3dba (vi-cmd-mode) \u00e1ll\u00edtanak, ami \u00e1ltal\u00e1ban nem el\u00e9rhet\u0151 alap\u00e9rtelmezett m\u00f3don a disztrib\u00faci\u00f3kban. A probl\u00e9ma nem jelentkezik, ha az xterm be\u00e1ll\u00edt\u00e1sai k\u00f6z\u00f6tt az allowWindowOps=false vagy allowFontOps=false \u00e9rt\u00e9k van megadva. P\u00e9ld\u00e1ul az allowFontOps=false be\u00e1ll\u00edt\u00e1st az OpenBSD, Debian \u00e9s RHEL rendszereken alkalmazz\u00e1k, de alap\u00e9rtelmez\u00e9s szerint nem \u00e9rv\u00e9nyes\u00fcl az Arch Linuxban. <\/p>\n

A v\u00e1ltoz\u00e1sok list\u00e1ja \u00e9s a probl\u00e9m\u00e1t felfedez\u0151 kutat\u00f3 nyilatkozata alapj\u00e1n a s\u00e9r\u00fcl\u00e9kenys\u00e9get a 375-\u00f6s xterm kiad\u00e1s orvosolja, de m\u00e1s forr\u00e1sok szerint a s\u00e9r\u00fcl\u00e9kenys\u00e9g tov\u00e1bbra is megnyilv\u00e1nul az Arch Linuxb\u00f3l sz\u00e1rmaz\u00f3 375-\u00f6s xterm verzi\u00f3ban. A disztrib\u00faci\u00f3k jav\u00edt\u00e1ssal kapcsolatos kiad\u00e1sainak nyomon k\u00f6vet\u00e9s\u00e9re az al\u00e1bbi oldalakon lehet: Debian, RHEL, Fedora, SUSE, Ubuntu, Arch Linux, OpenBSD, FreeBSD, NetBSD.
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u044d\u043c\u0443\u043b\u044f\u0442\u043e\u0440\u0435 \u0442\u0435\u0440\u043c\u0438\u043d\u0430\u043b\u0430 xterm \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-45063), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0438\u0441\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f shell-\u043a\u043e\u043c\u0430\u043d\u0434 \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u0432 \u0442\u0435\u0440\u043c\u0438\u043d\u0430\u043b\u0435 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u0445 escape-\u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0435\u0439. \u0414\u043b\u044f \u0430\u0442\u0430\u043a\u0438 \u0432 \u043f\u0440\u043e\u0441\u0442\u0435\u0439\u0448\u0435\u043c \u0441\u043b\u0443\u0447\u0430\u0435 \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u0432\u044b\u0432\u0435\u0441\u0442\u0438 \u043d\u0430 \u044d\u043a\u0440\u0430\u043d \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0435 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0444\u0430\u0439\u043b\u0430, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u0443\u0442\u0438\u043b\u0438\u0442\u044b cat, \u0438\u043b\u0438 \u0432\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u0441\u0442\u0440\u043e\u043a\u0443 \u0438\u0437 \u0431\u0443\u0444\u0435\u0440\u0430 \u043e\u0431\u043c\u0435\u043d\u0430. printf «\e]50;i\$(touch \/tmp\/hack-like-its-1999)\a\e]50;?\a» > cve-2022-45063 cat cve-2022-45063 \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043e\u0448\u0438\u0431\u043a\u043e\u0439 \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 escape-\u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0441 […]<\/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-105528","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\udd47S\u00e9r\u00fcl\u00e9kenys\u00e9g az xterm-ben, amely k\u00f3dv\u00e9grehajt\u00e1shoz vezet bizonyos sorok feldolgoz\u00e1sa sor\u00e1n | ProHoster","description":"Az xterm termin\u00e1lemul\u00e1torban felfedeztek egy s\u00e9r\u00fcl\u00e9kenys\u00e9get (CVE-2022-45063), amely lehet\u0151v\u00e9 teszi shell-parancsok v\u00e9grehajt\u00e1s\u00e1t bizonyos escape-sorozatok termin\u00e1lban t\u00f6rt\u00e9n\u0151 feldolgoz\u00e1sa sor\u00e1n.","canonical_url":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimost-v-xterm-privodyashhaya-k-vypolneniyu-koda-pri-obrabotke-opredelyonnyh-strok","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\udd47\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 xterm, \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u043a\u043e\u0434\u0430 \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u0445 \u0441\u0442\u0440\u043e\u043a | ProHoster","og:description":"\u0412 \u044d\u043c\u0443\u043b\u044f\u0442\u043e\u0440\u0435 \u0442\u0435\u0440\u043c\u0438\u043d\u0430\u043b\u0430 xterm \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-45063), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0438\u0441\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f shell-\u043a\u043e\u043c\u0430\u043d\u0434 \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u0432 \u0442\u0435\u0440\u043c\u0438\u043d\u0430\u043b\u0435 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u0445 escape-\u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0435\u0439.","og:url":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimost-v-xterm-privodyashhaya-k-vypolneniyu-koda-pri-obrabotke-opredelyonnyh-strok","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":"2022-11-12T13:36:44+00:00","article:modified_time":"2022-11-12T13:36:44+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\/105528","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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/comments?post=105528"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/105528\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/media?parent=105528"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/categories?post=105528"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/tags?post=105528"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}