{"id":107183,"date":"2023-03-10T18:48:11","date_gmt":"2023-03-10T16:48:11","guid":{"rendered":"https:\/\/prohoster.info\/?p=107183"},"modified":"2023-03-13T12:06:39","modified_gmt":"2023-03-13T10:06:39","slug":"kriticheskaya-uyazvimost-v-wasmtime-runtime-dlya-webassembly-prilozhenij","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/kriticheskaya-uyazvimost-v-wasmtime-runtime-dlya-webassembly-prilozhenij","title":{"rendered":"Kritisk s\u00e5rbarhed i Wasmtime, runtime for WebAssembly-applikationer","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

I de korrigerende opdateringer til Wasmtime 6.0.1, 5.0.1 og 4.0.1 er der rettet en s\u00e5rbarhed (CVE-2023-26489), som er blevet klassificeret som kritisk. S\u00e5rbarheden muligg\u00f8r, at data kan skrives til hukommelsesomr\u00e5der uden for de tilladte gr\u00e6nser for isoleret WebAssembly-kode, hvilket potentielt kan udnyttes af en angriber til at udf\u00f8re sin kode uden for det isolerede WASI-milj\u00f8. <\/p>\n

Wasmtime er en runtime til k\u00f8rsel af WebAssembly-applikationer med WASI-udvidelser (WebAssembly System Interface) som almindelige isolerede applikationer. V\u00e6rkt\u00f8jet er skrevet i Rust, og s\u00e5rbarheden skyldes en logisk fejl i bestemmelsen af reglerne for line\u00e6re adresseangivelser i Cranelift-kodegeneratoren, der overs\u00e6tter arkitektur-uafh\u00e6ngig mellemliggende repr\u00e6sentation til eksekverbar maskinkode for x86_64-arkitekturen. <\/p>\n

Specifikt blev 35-bit effektive adresser beregnet for WebAssembly-applikationer i stedet for de tilladte 33-bit adresser i WebAssembly, hvilket flyttede gr\u00e6nsen for de tilladte operationer for l\u00e6sning og skrivning af virtuel hukommelse op til 34 GB, mens indstillingerne for sandbox-milj\u00f8et tilbyder beskyttelse for 6 GB fra basisadressen. Som et resultat blev omr\u00e5det for virtuel hukommelse fra 6 til 34 GB fra basisadressen tilg\u00e6ngeligt for l\u00e6sning og skrivning fra WebAssembly-applikationer. I denne hukommelse kan andre WebAssembly-milj\u00f8er eller komponenter af WebAssembly-runtime placeres. <\/p>\n

Hvis det ikke er muligt at opdatere versionen af Wasmtime, n\u00e6vnes der alternative m\u00e5der at blokere fejlen p\u00e5 ved at angive indstillingen «Config::static_memory_maximum_size(0)» for at aktivere den p\u00e5kr\u00e6vede separate gr\u00e6nsekontrol ved enhver adgang til den line\u00e6re hukommelse (dette f\u00f8rer til en v\u00e6sentlig reduktion i ydeevnen). En anden mulighed er at bruge indstillingen «Config::static_memory_guard_size(1 < 36)» for at \u00f8ge antallet af hukommelsessider med overv\u00e5gning (Guard Page, der genererer en undtagelse ved adgang), som placeres i det problematiske omr\u00e5de af den virtuelle hukommelse (dette medf\u00f8rer, at der reserveres en stor m\u00e6ngde virtuel hukommelse og begr\u00e6nser antallet af samtidig k\u00f8rende WebAssembly-applikationer).
\n
Kilde: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0445 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f\u0445 Wasmtime 6.0.1, 5.0.1 \u0438 4.0.1 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2023-26489), \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u0437\u0430\u043f\u0438\u0441\u044c \u0434\u0430\u043d\u043d\u044b\u0445 \u0432 \u043e\u0431\u043b\u0430\u0441\u0442\u044c \u043f\u0430\u043c\u044f\u0442\u0438 \u0432\u043d\u0435 \u0433\u0440\u0430\u043d\u0438\u0446\u044b, \u0434\u043e\u043f\u0443\u0441\u0442\u0438\u043c\u043e\u0439 \u0434\u043b\u044f \u0438\u0437\u043e\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e WebAssembly-\u043a\u043e\u0434\u0430, \u0447\u0442\u043e \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u043e \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u043c \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0441\u0432\u043e\u0435\u0433\u043e \u043a\u043e\u0434\u0430 \u0432\u043d\u0435 \u0438\u0437\u043e\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f WASI. Wasmtime \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u0441\u043e\u0431\u043e\u0439 runtime \u0434\u043b\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f WebAssembly-\u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0441 \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u0438\u044f\u043c\u0438 WASI […]<\/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-107183","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\udd47Kritisk s\u00e5rbarhed i Wasmtime, runtime til WebAssembly-applikationer | ProHoster","description":"I de korrigerende opdateringer til Wasmtime 6.0.1, 5.0.1 og 4.0.1 er der rettet en s\u00e5rbarhed (CVE-2023-26489), som er blevet klassificeret som kritisk.","canonical_url":"https:\/\/prohoster.info\/da\/blog\/news\/kriticheskaya-uyazvimost-v-wasmtime-runtime-dlya-webassembly-prilozhenij","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"da_DK","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\u041a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 Wasmtime, runtime \u0434\u043b\u044f WebAssembly-\u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 | ProHoster","og:description":"\u0412 \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0445 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f\u0445 Wasmtime 6.0.1, 5.0.1 \u0438 4.0.1 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2023-26489), \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438.","og:url":"https:\/\/prohoster.info\/da\/blog\/news\/kriticheskaya-uyazvimost-v-wasmtime-runtime-dlya-webassembly-prilozhenij","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":"2023-03-10T16:48:11+00:00","article:modified_time":"2023-03-13T10:06:39+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\/da\/wp-json\/wp\/v2\/posts\/107183","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/da\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/da\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/da\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/da\/wp-json\/wp\/v2\/comments?post=107183"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/da\/wp-json\/wp\/v2\/posts\/107183\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/da\/wp-json\/wp\/v2\/media?parent=107183"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/da\/wp-json\/wp\/v2\/categories?post=107183"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/da\/wp-json\/wp\/v2\/tags?post=107183"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}