{"id":102257,"date":"2021-11-09T21:36:46","date_gmt":"2021-11-09T19:36:46","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/analiz-bezopasnosti-paketa-busybox-vyyavil-14-nesushhestvennyh-uyazvimostej"},"modified":"2021-11-09T21:36:46","modified_gmt":"2021-11-09T19:36:46","slug":"analiz-bezopasnosti-paketa-busybox-vyyavil-14-nesushhestvennyh-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/analiz-bezopasnosti-paketa-busybox-vyyavil-14-nesushhestvennyh-uyazvimostej","title":{"rendered":"Analiza bezpiecze\u0144stwa pakietu BusyBox ujawni\u0142a 14 nieistotnych podatno\u015bci","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Badacze z firm Claroty i JFrog opublikowali wyniki audytu bezpiecze\u0144stwa pakietu BusyBox, szeroko stosowanego w urz\u0105dzeniach wbudowanych, oferuj\u0105cego zestaw standardowych narz\u0119dzi UNIX, skompilowanych w formie jednego pliku wykonywalnego. W trakcie przegl\u0105du zidentyfikowano 14 luk w zabezpieczeniach, kt\u00f3re zosta\u0142y ju\u017c usuni\u0119te w sierpniowej wersji BusyBox 1.34. Prawie wszystkie problemy s\u0105 niegro\u017ane i w\u0105tpliwe pod wzgl\u0119dem zastosowania w rzeczywistych atakach, poniewa\u017c wymagaj\u0105 uruchomienia narz\u0119dzi z zewn\u0119trznymi argumentami. <\/p>\n

Osobno wyr\u00f3\u017cnia si\u0119 luka CVE-2021-42374, kt\u00f3ra pozwala na spowodowanie odmowy us\u0142ugi podczas przetwarzania specjalnie sformatowanego skompresowanego pliku przez narz\u0119dzie unlzma, a w przypadku kompilacji z opcj\u0105 CONFIG_FEATURE_SEAMLESS_LZMA, tak\u017ce przez inne komponenty BusyBox, w tym tar, unzip, rpm, dpkg, lzma i man. <\/p>\n

Luki CVE-2021-42373, CVE-2021-42375, CVE-2021-42376 i CVE-2021-42377 umo\u017cliwiaj\u0105 spowodowanie odmowy us\u0142ugi, ale wymagaj\u0105 uruchomienia narz\u0119dzi man, ash i hush z parametrami okre\u015blonymi przez atakuj\u0105cego. Luki z CVE-2021-42378 do CVE-2021-42386 dotycz\u0105 narz\u0119dzia awk i potencjalnie mog\u0105 prowadzi\u0107 do wykonania kodu, jednak\u017ce atakuj\u0105cy musi wymusi\u0107 wykonanie w awk okre\u015blonego wzorca (konieczne jest uruchomienie awk z przekazaniem w pierwszym argumencie wiersza polece\u0144 danych uzyskanych od atakuj\u0105cego). <\/p>\n

Dodatkowo mo\u017cna zauwa\u017cy\u0107 podatno\u015b\u0107 (CVE-2021-43523) w bibliotekach uclibc i uclibc-ng, polegaj\u0105c\u0105 na tym, \u017ce podczas korzystania z funkcji gethostbyname(), getaddrinfo(), gethostbyaddr() i getnameinfo() nie jest wykonywana weryfikacja i oczyszczanie nazwy domeny zwr\u00f3conej przez serwer DNS. Na przyk\u0142ad w odpowiedzi na okre\u015blone zapytanie rozdzielenia, kontrolowany przez przest\u0119pc\u0119 serwer DNS mo\u017ce zwr\u00f3ci\u0107 hosty w postaci «<script>alert(‘xss’)<\\\/script>.attacker.com», kt\u00f3re zostan\u0105 zwr\u00f3cone w niezmienionej formie do jakiego\u015b programu, kt\u00f3ry bez oczyszczenia mo\u017ce je wy\u015bwietli\u0107 w interfejsie webowym. Problem zosta\u0142 rozwi\u0105zany w wersji uclibc-ng 1.0.39 poprzez dodanie kodu do sprawdzenia poprawno\u015bci zwracanych warto\u015bci. nazw domen<\/a>, wdro\u017conym na wz\u00f3r Glibc.
\n
\u0179r\u00f3d\u0142o: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0439 Claroty \u0438 JFrog \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0438 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u0430\u0443\u0434\u0438\u0442\u0430 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u043f\u0430\u043a\u0435\u0442\u0430 BusyBox, \u0448\u0438\u0440\u043e\u043a\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c\u043e\u0433\u043e \u0432\u043e \u0432\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u0435\u043c\u044b\u0445 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430\u0445 \u0438 \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u044e\u0449\u0435\u0433\u043e \u043d\u0430\u0431\u043e\u0440 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u044b\u0445 \u0443\u0442\u0438\u043b\u0438\u0442 UNIX, \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 \u0432 \u0432\u0438\u0434\u0435 \u0435\u0434\u0438\u043d\u043e\u0433\u043e \u0438\u0441\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u043e\u0433\u043e \u0444\u0430\u0439\u043b\u0430. \u0412 \u0445\u043e\u0434\u0435 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043e 14 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0443\u0436\u0435 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0432 \u0430\u0432\u0433\u0443\u0441\u0442\u043e\u0432\u0441\u043a\u043e\u043c \u0432\u044b\u043f\u0443\u0441\u043a\u0435 BusyBox 1.34. \u041f\u043e\u0447\u0442\u0438 \u0432\u0441\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u043d\u0435\u043e\u043f\u0430\u0441\u043d\u044b \u0438 \u0441\u043e\u043c\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b \u0441 \u0442\u043e\u0447\u043a\u0438 \u0437\u0440\u0435\u043d\u0438\u044f \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0432 \u0440\u0435\u0430\u043b\u044c\u043d\u044b\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-102257","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\udd47Analiza bezpiecze\u0144stwa pakietu BusyBox ujawnia 14 nieistotnych luk w zabezpieczeniach | ProHoster","description":"Badacze z firm Claroty i JFrog opublikowali wyniki audytu bezpiecze\u0144stwa pakietu BusyBox, szeroko stosowanego w urz\u0105dzeniach wbudowanych, oferuj\u0105cego zestaw standardowych 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