{"id":71650,"date":"2020-02-27T08:51:33","date_gmt":"2020-02-27T05:51:33","guid":{"rendered":"https:\/\/prohoster.info\/blog\/mozilla-nachinaet-vnedrenie-tehnologii-izolyaczii-bibliotek-rlbox"},"modified":"2020-03-03T16:10:40","modified_gmt":"2020-03-03T13:10:40","slug":"mozilla-nachinaet-vnedrenie-tehnologii-izolyaczii-bibliotek-rlbox","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/mozilla-nachinaet-vnedrenie-tehnologii-izolyaczii-bibliotek-rlbox","title":{"rendered":"Mozilla rozpoczyna wdra\u017canie technologii izolacji bibliotek RLBox","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Badacze z Uniwersytetu Stanforda, Uniwersytetu Kalifornijskiego w San Diego i Uniwersytetu Teksaskiego w Austin <noindex><a rel=\"nofollow\" href=\"https:\/\/cns.utexas.edu\/news\/new-sandboxing-approach-in-web-browser-increases-security\">opracowali<\/a><\/noindex> narz\u0119dzia <noindex><a rel=\"nofollow\" href=\"https:\/\/rlbox.dev\/\">RLBox<\/a><\/noindex>, kt\u00f3ry mo\u017ce by\u0107 stosowany jako dodatkowy poziom izolacji w celu blokowania luk w bibliotekach funkcji. RLBox ma na celu rozwi\u0105zanie problemu z bezpiecze\u0144stwem niegodnych zaufania zewn\u0119trznych bibliotek, kt\u00f3re nie s\u0105 kontrolowane przez programist\u00f3w, ale luki w nich mog\u0105 skompromitowa\u0107 g\u0142\u00f3wny projekt. <\/p>\n<p>Firma Mozilla  <noindex><a rel=\"nofollow\" href=\"https:\/\/hacks.mozilla.org\/2020\/02\/securing-firefox-with-webassembly\/\">zapowiada<\/a><\/noindex> wdro\u017cy\u0107 RLBox w wersjach Linux Firefox 74 oraz macOS Firefox 75 w celu izolacji wykonania biblioteki <noindex><a rel=\"nofollow\" href=\"http:\/\/scripts.sil.org\/cms\/scripts\/page.php?site_id=projects&#038;item_id=graphite_home\">Graphite<\/a><\/noindex>, odpowiedzialnej za renderowanie czcionek. RLBox nie jest specyficzny dla Firefox i mo\u017ce by\u0107 stosowany do izolacji dowolnych bibliotek w r\u00f3\u017cnych projektach. <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/shravanrn\/LibrarySandboxing\/\">Osi\u0105gni\u0119cia<\/a><\/noindex> RLBox <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/PLSysSec\/rlbox_lucet_sandbox\">s\u0105 rozpowszechniane<\/a><\/noindex> na licencji MIT. Obecnie RLBox dzia\u0142a na platformach Linux i macOS, wsparcie dla Windows przewidywane jest w p\u00f3\u017aniejszym terminie.<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/shravanrn\/LibrarySandboxing\/blob\/master\/paper.pdf\">Mechanizm<\/a><\/noindex> dzia\u0142anie RLBox polega na kompilacji kodu C\/C++ z izolowanej biblioteki do niskopoziomowego kodu po\u015bredniego WebAssembly, kt\u00f3ry nast\u0119pnie jest przekszta\u0142cany w modu\u0142 WebAssembly, kt\u00f3rego uprawnienia s\u0105 ograniczone tylko do tego modu\u0142u (na przyk\u0142ad biblioteka do przetwarzania \u0142a\u0144cuch\u00f3w nie b\u0119dzie mog\u0142a otworzy\u0107 gniazda sieciowego ani pliku). Transformacja kodu C\/C++ do WebAssembly odbywa si\u0119 za pomoc\u0105 <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/CraneStation\/wasi-sdk\">wasi-sdk<\/a><\/noindex>. <\/p>\n<p>Aby wykona\u0107 modu\u0142 WebAssembly, jest on kompilowany do kodu maszynowego za pomoc\u0105 kompilatora <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50418\">Lucet<\/a><\/noindex> i odbywa si\u0119 w osobnym &#171;nano-procesie&#187;, odizolowanym od pozosta\u0142ej pami\u0119ci aplikacji. Kompilator Lucet oparty jest na tym samym kodzie, co silnik JIT <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/bytecodealliance\/cranelift\">Cranelift<\/a><\/noindex>, stosowanym w Firefox do wykonywania WebAssembly. <\/p>\n<p>Zbudowany modu\u0142 dzia\u0142a w oddzielnym obszarze pami\u0119ci i nie ma dost\u0119pu do reszty przestrzeni adresowej. W przypadku wykorzystania luki w bibliotece napastnik b\u0119dzie ograniczony i nie b\u0119dzie m\u00f3g\u0142 uzyska\u0107 dost\u0119pu do obszar\u00f3w pami\u0119ci g\u0142\u00f3wnego procesu ani przekaza\u0107 kontroli poza izolowane \u015brodowisko. <\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/plsyssec.github.io\/rlbox_sandboxing_api\/sphinx\/_images\/arch.png\"><img decoding=\"async\" alt=\"Mozilla rozpoczyna wdra\u017canie technologii izolacji bibliotek RLBox\" src=\"\/wp-content\/uploads\/2020\/02\/9d44e49c9cc16b2280997c3cbebc89f9.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Dla programist\u00f3w dost\u0119pny jest wyspecjalizowany <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/plsyssec\/rlbox_sandboxing_api\/\">API<\/a><\/noindex>, kt\u00f3ry umo\u017cliwia wywo\u0142ywanie funkcji biblioteki w trybie izolacji. WebAssembly-handlerzy prawie nie wymagaj\u0105 dodatkowych zasob\u00f3w, a interakcja z nimi nie jest znacznie wolniejsza ni\u017c wywo\u0142anie zwyk\u0142ych funkcji (funkcje biblioteki s\u0105 wykonywane w formie kodu natywnego, a dodatkowe koszty pojawiaj\u0105 si\u0119 jedynie podczas kopiowania i sprawdzania danych w trakcie interakcji z izolowanym \u015brodowiskiem). Funkcje izolowanej biblioteki nie mog\u0105 by\u0107 wywo\u0142ywane bezpo\u015brednio, a ich u\u017cycie wymaga zastosowania<br \/>\n po\u015brednika invoke_sandbox_function(). <\/p>\n<p>Z kolei, je\u015bli z biblioteki trzeba wywo\u0142a\u0107 zewn\u0119trzne funkcje, te funkcje musz\u0105 by\u0107 wyra\u017anie zdefiniowane za pomoc\u0105 metody register_callback (domy\u015blnie RLBox udost\u0119pnia dost\u0119p do funkcji <noindex><a rel=\"nofollow\" href=\"https:\/\/plsyssec.github.io\/rlbox_sandboxing_api\/sphinx\/#stdlib\">standardowej biblioteki<\/a><\/noindex>). Aby zapewni\u0107 bezpieczn\u0105 obs\u0142ug\u0119 pami\u0119ci (memory safety), izolacja wykonywanego kodu nie wystarcza, a konieczne jest r\u00f3wnie\u017c zapewnienie weryfikacji zwracanych strumieni danych.<\/p>\n<p>Warto\u015bci utworzone w izolowanym \u015brodowisku s\u0105 oznaczane jako niewiarygodne, ograniczane za pomoc\u0105 <noindex><a rel=\"nofollow\" href=\"https:\/\/plsyssec.github.io\/rlbox_sandboxing_api\/sphinx\/#tainted\">metek tainted<\/a><\/noindex> i do &#171;czyszczenia&#187; wymagaj\u0105 <noindex><a rel=\"nofollow\" href=\"https:\/\/plsyssec.github.io\/rlbox_sandboxing_api\/sphinx\/#verification\">weryfikacji<\/a><\/noindex> oraz kopiowania do pami\u0119ci aplikacji.<br \/>\nBez czyszczenia, pr\u00f3ba u\u017cycia danych zanieczyszczonych w kontek\u015bcie wymagaj\u0105cym zwyk\u0142ych danych (i odwrotnie) prowadzi do generowania b\u0142\u0119d\u00f3w na etapie kompilacji. Ma\u0142e argumenty funkcji, warto\u015bci zwracane oraz struktury przekazywane s\u0105 przez kopiowanie pomi\u0119dzy pami\u0119ci\u0105 procesu a pami\u0119ci\u0105 odizolowanego \u015brodowiska. Dla wi\u0119kszych zestaw\u00f3w danych pami\u0119\u0107 przydzielana jest w odizolowanym \u015brodowisku, a g\u0142\u00f3wnemu procesowi zwracany jest bezpo\u015bredni wska\u017anik &#171;sandbox-reference&#187;. <\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>\u0179r\u00f3d\u0142o: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52440\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0438\u0437 \u0421\u0442\u0435\u043d\u0434\u0444\u043e\u0440\u0434\u0441\u043a\u043e\u0433\u043e \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442\u0430, \u041a\u0430\u043b\u0438\u0444\u043e\u0440\u043d\u0438\u0439\u0441\u043a\u043e\u0433\u043e \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442\u0430 \u0432 \u0421\u0430\u043d-\u0414\u0438\u0435\u0433\u043e \u0438 \u0422\u0435\u0445\u0430\u0441\u0441\u043a\u043e\u0433\u043e \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442\u0430 \u0432 \u041e\u0441\u0442\u0438\u043d\u0435 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0430\u043b\u0438 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0439 RLBox, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0442\u044c\u0441\u044f \u043a\u0430\u043a \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u0438 \u0434\u043b\u044f \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430\u0445 \u0444\u0443\u043d\u043a\u0446\u0438\u0439. RLBox \u043d\u0430\u0446\u0435\u043b\u0435\u043d \u043d\u0430 \u0440\u0435\u0448\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0441 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u044c\u044e \u043d\u0435\u0437\u0430\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u044e\u0449\u0438\u0445 \u0434\u043e\u0432\u0435\u0440\u0438\u044f \u0441\u0442\u043e\u0440\u043e\u043d\u043d\u0438\u0445 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043d\u0435 \u043f\u043e\u0434\u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c\u043d\u044b \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0430\u043c, \u043d\u043e \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043c\u043e\u0433\u0443\u0442 \u0441\u043a\u043e\u043c\u043f\u0440\u043e\u043c\u0435\u0442\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u043f\u0440\u043e\u0435\u043a\u0442. \u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Mozilla \u043f\u043b\u0430\u043d\u0438\u0440\u0443\u0435\u0442 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":71651,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-71650","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0438\u0437 \u0421\u0442\u0435\u043d\u0434\u0444\u043e\u0440\u0434\u0441\u043a\u043e\u0433\u043e \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442\u0430, 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