{"id":116387,"date":"2024-06-06T15:39:51","date_gmt":"2024-06-06T13:39:51","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-etalonnyh-realizacziyah-kodekov-av1-i-vp8-vp9"},"modified":"2024-06-06T15:39:51","modified_gmt":"2024-06-06T13:39:51","slug":"uyazvimost-v-etalonnyh-realizacziyah-kodekov-av1-i-vp8-vp9","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/uyazvimost-v-etalonnyh-realizacziyah-kodekov-av1-i-vp8-vp9","title":{"rendered":"Luka w referencyjnych implementacjach kodek\u00f3w AV1 oraz VP8\/VP9","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

W bibliotece libaom rozwijanej przez sojusz Open Media (AOMedia), kt\u00f3ra oferuje standardow\u0105 implementacj\u0119 formatu kodowania wideo AV1, zidentyfikowano krytyczn\u0105 podatno\u015b\u0107 (CVE-2024-5171), prowadz\u0105c\u0105 do przepe\u0142nienia liczb ca\u0142kowitych i zapisu poza granicami bufora przy przetwarzaniu zbyt du\u017cych warto\u015bci w niekt\u00f3rych parametrach. Podobna podatno\u015b\u0107 (CVE-2024-5197) zosta\u0142a zidentyfikowana w bibliotece libvpx, implementuj\u0105cej kodeki VP8 i VP9. Problemy zosta\u0142y rozwi\u0105zane w aktualizacjach libaom 3.9.0 i libvpx 1.14.1. W dystrybucjach podatno\u015bci nadal pozostaj\u0105 niepoprawione (Debian, Ubuntu, RHEL, SUSE\/openSUSE, Fedora, Arch, FreeBSD). <\/p>\n

Podatno\u015bci w libaom przyznano maksymalny poziom zagro\u017cenia (10 na 10), co sugeruje mo\u017cliwo\u015b\u0107 wykorzystania przy przetwarzaniu w aplikacjach korzystaj\u0105cych z tej biblioteki specjalnie przygotowanego kontentu. W libvpx poziom zagro\u017cenia oceniono na 5.9 z 10, co odpowiada ograniczonym warunkom wykorzystania. G\u0142\u00f3wne niebezpiecze\u0144stwo podatno\u015bci w libaom i libvpx wynika z tego, \u017ce biblioteki te s\u0105 u\u017cywane w przegl\u0105darkach internetowych, odtwarzaczach multimedialnych i serwisach przeprowadzaj\u0105cych transkodowanie wideo. <\/p>\n

Podatno\u015b\u0107 manifestuje si\u0119 w libaom podczas wywo\u0142ania funkcji aom_img_alloc(), aom_img_wrap() lub aom_img_alloc_with_border() z du\u017cymi warto\u015bciami w parametrach d_w, d_h i align, co prowadzi do przepe\u0142nienia liczb ca\u0142kowitych przy obliczaniu przesuni\u0119\u0107 i rozmiar\u00f3w bufor\u00f3w. Podobne przepe\u0142nienie wyst\u0119puje w funkcjach vpx_img_alloc() i vpx_img_wrap(). Wspomniane funkcje s\u0105 u\u017cywane przy kodowaniu wideo. <\/p>\n

Najwi\u0119ksze niebezpiecze\u0144stwo podatno\u015bci wi\u0105\u017ce si\u0119 z potencjalnymi mo\u017cliwo\u015bciami ataku na przegl\u0105darki, w kt\u00f3rych wcze\u015bniejsze podobne podatno\u015bci mog\u0142y by\u0107 wykorzystywane przez otwieranie specjalnie przygotowanych stron w przegl\u0105darkach, wywo\u0142uj\u0105cych funkcje JavaScript do kodowania wideo, lub przez manipulacje z WebRTC. Wed\u0142ug przedstawicieli Google, podatno\u015b\u0107 nie dotyczy silnika Chromium, poniewa\u017c w funkcjach aom_img_alloc(), aom_img_wrap(), vpx_img_alloc() i vpx_img_wrap() przekazywane by\u0142y tylko zweryfikowane warto\u015bci argument\u00f3w d_w i d_h. W Firefox do dekodowania AV1 u\u017cywana jest biblioteka dav1d, ale do kodowania zastosowano libaom. Nie jest jasne, czy Firefox jest podatny na problem, poniewa\u017c informacje o tym, jak podatno\u015b\u0107 dotyczy konkretnych produkt\u00f3w, nie zosta\u0142y jeszcze opublikowane.
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\u0179r\u00f3d\u0142o: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u0439 \u0430\u043b\u044c\u044f\u043d\u0441\u043e\u043c Open Media (AOMedia) \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 libaom, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u0439 \u044d\u0442\u0430\u043b\u043e\u043d\u043d\u0443\u044e \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u0444\u043e\u0440\u043c\u0430\u0442\u0430 \u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0432\u0438\u0434\u0435\u043e AV1, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2024-5171), \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u0446\u0435\u043b\u043e\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u043e\u043c\u0443 \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u0438 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\u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0432 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f\u0445 […]<\/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-116387","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\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\udd47Luka w referencyjnych implementacjach kodek\u00f3w AV1 i VP8\/VP9 | ProHoster","description":"W rozwijanej przez sojusz Open Media (AOMedia) bibliotece libaom, kt\u00f3ra oferuje referencyjn\u0105 implementacj\u0119 formatu kodowania wideo AV1, wykryto krytyczn\u0105 luk\u0119 bezpiecze\u0144stwa 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\u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u0439 \u0430\u043b\u044c\u044f\u043d\u0441\u043e\u043c Open Media (AOMedia) \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 libaom, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u0439 \u044d\u0442\u0430\u043b\u043e\u043d\u043d\u0443\u044e \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u0444\u043e\u0440\u043c\u0430\u0442\u0430 \u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0432\u0438\u0434\u0435\u043e AV1, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2024-5171), \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a 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