{"id":74109,"date":"2020-03-14T08:42:14","date_gmt":"2020-03-14T05:42:14","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/loadlibrary-proslojka-dlya-zagruzki-windows-dll-v-linux-prilozheniya"},"modified":"2020-03-14T08:42:14","modified_gmt":"2020-03-14T05:42:14","slug":"loadlibrary-proslojka-dlya-zagruzki-windows-dll-v-linux-prilozheniya","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/loadlibrary-proslojka-dlya-zagruzki-windows-dll-v-linux-prilozheniya","title":{"rendered":"LoadLibrary, warstwa do \u0142adowania DLL Windows w aplikacjach Linux.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Tavis Ormandy (<noindex><a rel=\"nofollow\" href=\"https:\/\/twitter.com\/taviso\">Tavis Ormandy<\/a><\/noindex>), badacz bezpiecze\u0144stwa z Google, rozwija projekt <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/taviso\/loadlibrary\">LoadLibrary<\/a><\/noindex>, kt\u00f3ry ma na celu portowanie zebranych dla systemu Windows bibliotek DLL do ich u\u017cycia w aplikacjach dla systemu Linux. Projekt obejmuje bibliotek\u0119 po\u015bredni\u0105, dzi\u0119ki kt\u00f3rej mo\u017cna za\u0142adowa\u0107 plik DLL w formacie PE\/COFF i wywo\u0142a\u0107 okre\u015blone w nim funkcje. \u0141adowarka PE\/COFF opiera si\u0119 na kodzie <noindex><a rel=\"nofollow\" href=\"http:\/\/ndiswrapper.sourceforge.net\/\">ndiswrapper<\/a><\/noindex>. Kod projektu <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/taviso\/loadlibrary\">rozpowszechniany<\/a><\/noindex> na licencji GPLv2.<\/p>\n<p>LoadLibrary przejmuje funkcje \u0142adowania biblioteki do pami\u0119ci i importowania dost\u0119pnych symboli, zapewniaj\u0105c aplikacji Linux API w stylu dlopen. Pod\u0142\u0105czony kod mo\u017ce by\u0107 debugowany za pomoc\u0105 gdb, ASAN i Valgrind. Przewidziano mo\u017cliwo\u015b\u0107 modyfikacji wykonywanego kodu w czasie rzeczywistym poprzez pod\u0142\u0105czanie haczyk\u00f3w i nak\u0142adanie poprawek (runtime patching). Obs\u0142ugiwane s\u0105 obs\u0142uga i rozwijanie (unwinding) wyj\u0105tk\u00f3w dla C++.<\/p>\n<p>Celem projektu jest organizacja skalowalnego i efektywnego rozproszonego testowania fuzzingowego bibliotek DLL w \u015brodowisku opartym na Linux. W systemie Windows przeprowadzanie test\u00f3w fuzzingowych i pokrywania nie pozwala na osi\u0105gni\u0119cie nale\u017cytej efektywno\u015bci i cz\u0119sto wymaga uruchomienia oddzielnego zwirtualizowanego egzemplarza systemu Windows, szczeg\u00f3lnie przy pr\u00f3bie analizy z\u0142o\u017conych produkt\u00f3w, takich jak oprogramowanie antywirusowe, zajmuj\u0105ce si\u0119 prac\u0105 na poziomie j\u0105dra i przestrzeni u\u017cytkownika. Dzi\u0119ki LoadLibrary badacze z Google prowadz\u0105 poszukiwania luk w kodach wideo, skanerach antywirusowych, bibliotekach rozpakowywania danych, dekoderach obraz\u00f3w itp. <\/p>\n<p>Na przyk\u0142ad dzi\u0119ki LoadLibrary uda\u0142o si\u0119 zaportowa\u0107 silnik antywirusowy Windows Defender do uruchomienia w Linux. Badanie mpengine.dll, b\u0119d\u0105cego rdzeniem Windows Defender, umo\u017cliwi\u0142o analiz\u0119 du\u017cej liczby z\u0142o\u017conych procesor\u00f3w r\u00f3\u017cnych format\u00f3w, emulator\u00f3w FS i interpreter\u00f3w j\u0119zyk\u00f3w, potencjalnie dostarczaj\u0105cych wektory do <noindex><a rel=\"nofollow\" href=\"https:\/\/googleprojectzero.blogspot.com\/2018\/12\/searching-statically-linked-vulnerable.html\">mo\u017cliwych<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/googleprojectzero.blogspot.com\/2018\/10\/injecting-code-into-windows-protected.html\">atakami<\/a><\/noindex>.<\/p>\n<p>LoadLibrary by\u0142 r\u00f3wnie\u017c u\u017cywany do identyfikacji <noindex><a rel=\"nofollow\" href=\"https:\/\/twitter.com\/avast_antivirus\/status\/1237685343580753925\">zdalnej luki<\/a><\/noindex> w pakiecie antywirusowym Avast. Podczas badania DLL tego antywirusa zidentyfikowano, \u017ce kluczowy proces skanowania z przywilejami obejmuje pe\u0142noprawny interpreter JavaScript, kt\u00f3ry jest u\u017cywany do emulacji wykonywania zewn\u0119trznego kodu JavaScript. Proces ten nie jest izolowany w \u015brodowisku sandbox, nie obni\u017ca przywilej\u00f3w i analizuje niezweryfikowane zewn\u0119trzne dane z systemu plik\u00f3w oraz przechwyconego ruchu sieciowego. Poniewa\u017c ka\u017cda luka w tym z\u0142o\u017conym i niechronionym procesie mo\u017ce potencjalnie prowadzi\u0107 do zdalnej kompromentacji ca\u0142ego systemu, na bazie LoadLibrary stworzono specjaln\u0105 nak\u0142adk\u0119. <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/taviso\/avscript\">avscript<\/a><\/noindex> do analizy luk w skanerze antywirusowym Avast w \u015brodowisku opartym na Linuxie.<\/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=52530\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0422\u044d\u0432\u0438\u0441 \u041e\u0440\u043c\u0430\u043d\u0434\u0438 (Tavis Ormandy), \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0438\u0437 Google, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u0442 \u043f\u0440\u043e\u0435\u043a\u0442 LoadLibrary, \u043d\u0430\u0446\u0435\u043b\u0435\u043d\u043d\u044b\u0439 \u043d\u0430 \u043f\u043e\u0440\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0441\u043e\u0431\u0440\u0430\u043d\u043d\u044b\u0445 \u0434\u043b\u044f Windows DLL-\u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a \u0434\u043b\u044f \u0438\u0445 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0432 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f\u0445 \u0434\u043b\u044f Linux. \u041f\u0440\u043e\u0435\u043a\u0442\u043e\u043c \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430-\u043f\u0440\u043e\u0441\u043b\u043e\u0439\u043a\u0430, \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u043c\u043e\u0436\u043d\u043e \u0437\u0430\u0433\u0440\u0443\u0437\u0438\u0442\u044c DLL-\u0444\u0430\u0439\u043b \u0432 \u0444\u043e\u0440\u043c\u0430\u0442\u0435 PE\/COFF \u0438 \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u0435 \u0432 \u043d\u0451\u043c \u0444\u0443\u043d\u043a\u0446\u0438\u0438. \u0417\u0430\u0433\u0440\u0443\u0437\u0447\u0438\u043a PE\/COFF \u043e\u0441\u043d\u043e\u0432\u0430\u043d \u043d\u0430 \u043a\u043e\u0434\u0435 ndiswrapper. \u041a\u043e\u0434 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 GPLv2. [&hellip;]<\/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-74109","post","type-post","status-publish","format-standard","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=\"\u0422\u044d\u0432\u0438\u0441 \u041e\u0440\u043c\u0430\u043d\u0434\u0438 (Tavis Ormandy), \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0438\u0437 Google, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u0442 \u043f\u0440\u043e\u0435\u043a\u0442\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link 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