{"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\/sl\/blog\/news\/loadlibrary-proslojka-dlya-zagruzki-windows-dll-v-linux-prilozheniya","title":{"rendered":"LoadLibrary, vmesnik za nalaganje Windows DLL v Linux aplikacije","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Tavis Ormandy (Tavis Ormandy<\/a><\/noindex>), raziskovalec varnosti pri Googlu, razvija projekt LoadLibrary<\/a><\/noindex>, usmerjen v prenos zbranih DLL-knji\u017enic za Windows za uporabo v aplikacijah za Linux. Projekt nudi knji\u017enico-prehod, s katero je mogo\u010de nalo\u017eiti DLL-datoteko v formatu PE\/COFF in poklicati dolo\u010dene funkcije v njej. Nalo\u017enik PE\/COFF temelji na kodi ndiswrapper<\/a><\/noindex>. Koda projekta se distribuira<\/a><\/noindex> pod licenco GPLv2.<\/p>\n

LoadLibrary prevzema naloge nalaganja knji\u017enice v pomnilnik in uva\u017eanja obstoje\u010dih simbolov, kar Linux-aplikaciji zagotavlja API stil dlopen. Priklju\u010deno kodo je mogo\u010de odpravljati napake s pomo\u010djo gdb, ASAN in Valgrind. Predvidena je mo\u017enost prilagajanja izvajalnega kode med izvajanjem s povezovanjem hook-ov in nalaganjem popravkov (runtime patching). Podprto je obravnavanje in odvijanje (unwinding) izjem v C++.<\/p>\n

Cilj projekta je organizacija raz\u0161irljivega in u\u010dinkovitega distribuiranega fuzzing-testiranja DLL-knji\u017enic v okolju, temeljnem na Linuxu. V operacijskem sistemu Windows fuzzing- in coverage-testiranje ne omogo\u010data dosego \u017eelenih rezultatov in pogosto zahteva zagon lo\u010dene virtualizirane instance Windows, \u0161e posebej pri poskusih analize zapletenih izdelkov, kot je protivirusna programska oprema, ki pokriva delovanje na ravni jedra in v prostoru uporabnika. S pomo\u010djo LoadLibrary raziskovalci Googla raziskujejo ranljivosti v video kodekih, protivirusnih skenerjih, knji\u017enicah za razpakiranje podatkov, dekoderjih slik itd. <\/p>\n

Na primer, s pomo\u010djo LoadLibrary je bilo mogo\u010de portirati antivirski motor Windows Defender za zagon v Linuxu. Raziskava mpengine.dll, ki je temelj Windows Defenderja, je omogo\u010dila analizo velikega \u0161tevila zapletenih obdelovalcev razli\u010dnih formatov, emulatorjev FS in interpreterjev jezikov, ki potencialno zagotavljajo vektorje za mo\u017enih<\/a><\/noindex> napadi<\/a><\/noindex>.<\/p>\n

LoadLibrary je bil prav tako uporabljen pri odkrivanju oddaljenih ranljivosti<\/a><\/noindex> v antivirusnem paketu Avast. Pri analizi DLL tega antivirusnega programa je bilo ugotovljeno, da klju\u010dni privilegiran proces skeniranja vklju\u010duje popoln JavaScript interpreter, ki se uporablja za emulacijo izvajanja tretje strani JavaScript kode. Ta proces ni izoliran v sandbox okolje, ne prekli\u010de privilegijev in izvaja analizo nepreverjenih zunanjih podatkov iz datote\u010dnega sistema in prestre\u017eenega omre\u017enega prometa. Ker lahko vsaka ranljivost v tem zapletenem in nezavarovanem procesu potencialno pripelje do oddaljene kompromitacije celotnega sistema, je bila na osnovi LoadLibrary razvila posebna lupina. avscript<\/a><\/noindex> za analizo ranljivosti v antivirusnem skenerju Avast v okolju, temeljnem na Linuxu.<\/p>\n

<\/a><\/noindex><\/p>\n

Izvor: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\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. […]<\/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\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\udd47LoadLibrary, vmesnik za nalaganje Windows DLL v Linux aplikacije | ProHoster","description":"Tavis Ormandy, varnostni raziskovalec iz Google-a, razvija 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