{"id":116209,"date":"2024-05-30T15:40:12","date_gmt":"2024-05-30T13:40:12","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/proekt-xz-opublikoval-rezultat-audita-kommitov-i-pervoe-obnovlenie-posle-vyyavleniya-bekdora"},"modified":"2024-05-30T15:40:12","modified_gmt":"2024-05-30T13:40:12","slug":"proekt-xz-opublikoval-rezultat-audita-kommitov-i-pervoe-obnovlenie-posle-vyyavleniya-bekdora","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/proekt-xz-opublikoval-rezultat-audita-kommitov-i-pervoe-obnovlenie-posle-vyyavleniya-bekdora","title":{"rendered":"Projekt XZ opublikowa\u0142 wyniki audytu commit\u00f3w oraz pierwsz\u0105 aktualizacj\u0119 po odkryciu backdoora.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Lasse Collin, stary opiekun projektu xz, w 2022 roku przekaza\u0142 prawa nowemu opiekunowi Jia Tan, kt\u00f3rego dzia\u0142ania doprowadzi\u0142y do wprowadzenia tylnego wej\u015bcia. Opublikowa\u0142 poprawkowe wydania pakietu XZ Utils 5.2.13, 5.4.7 i 5.6.2, w kt\u00f3rych usuni\u0119to komponenty tylnego wej\u015bcia i inne podejrzane zmiany wprowadzone na skutek z\u0142o\u015bliwej dzia\u0142alno\u015bci poprzedniego opiekuna. <\/p>\n

Ponadto opublikowano raport z przegl\u0105du repozytorium Git oraz zmian wprowadzonych od grudnia 2022 roku, kiedy to Jia Tan by\u0142 opiekunem. Zmiany zosta\u0142y om\u00f3wione na poziomie poszczeg\u00f3lnych commit\u00f3w. Commity w repozytorium nie by\u0142y podpisane cyfrowo, ale nie wykryto \u015blad\u00f3w fa\u0142szerstw ze strony committer\u00f3w. \u0141\u0105cznie z repozytorium usuni\u0119to 8 z\u0142o\u015bliwych commit\u00f3w. <\/p>\n

Kod CRC CLMUL wci\u0105\u017c nie zosta\u0142 usuni\u0119ty z bazy kodu, co prowadzi do fa\u0142szywych alarm\u00f3w podczas sprawdzania w MSAN (Memory sanitizer) oraz problem\u00f3w z OSS Fuzz. W przysz\u0142o\u015bci zamierzaj\u0105 przemy\u015ble\u0107 ten kod, ale na razie postanowiono go nie rusza\u0107, aby unikn\u0105\u0107 regresji w starych ga\u0142\u0119ziach. Nie wykryto podejrzanych zmian w starych commitach, kt\u00f3re zosta\u0142y dodane przed zmianami zwi\u0105zanymi z promocj\u0105 tylnego wej\u015bcia. Osobno sprawdzono pliki po lokalizacji, metadane w plikach tar oraz archiwa z wydaniami i t\u0142umaczeniami. <\/p>\n

W ramach zmian odnotowano w\u0142\u0105czenie nagromadzonych poprawek b\u0142\u0119d\u00f3w oraz usuni\u0119cie wsparcia dla mechanizmu IFUNC, kt\u00f3ry by\u0142 oferowany przez Glibc do po\u015bredniego wywo\u0142ywania funkcji, a kt\u00f3ry zosta\u0142 wykorzystany do przechwytywania funkcji w tylnym wej\u015bciu. Odnotowano, \u017ce u\u017cycie IFUNC tylko komplikuje kod, a zysk w wydajno\u015bci z nim zwi\u0105zany jest niewielki. Dla pewno\u015bci z pakietu z kodem \u017ar\u00f3d\u0142owym usuni\u0119to r\u00f3wnie\u017c logo XZ, wersje PDF stron man oraz dwa testy dla architektur x86 i SPARC, w kt\u00f3rych jako dane wej\u015bciowe przetwarzane by\u0142y pliki obiektowe. <\/p>\n

W\u015br\u00f3d nowo\u015bci w dekodera xzdec dodano wsparcie dla 4. wersji ABI mechanizmu izolacji aplikacji Landlock. Do skrypt\u00f3w budowlanych Autotools dodana zosta\u0142a opcja «—enable-doxygen», a w skrypcie Cmake parametr ENABLE_DOXYGEN do generacji i instalacji dokumentacji API liblzma za pomoc\u0105 Doxygen. Ju\u017c wygenerowana dokumentacja zosta\u0142a usuni\u0119ta z pakietu.
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\u0179r\u00f3d\u0142o: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041b\u0430\u0441\u0441\u0435 \u041a\u043e\u043b\u043b\u0438\u043d (Lasse Collin), \u0441\u0442\u0430\u0440\u044b\u0439 \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0430\u044e\u0449\u0438\u0439 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 xz, \u0432 2022 \u0433\u043e\u0434\u0443 \u043f\u0435\u0440\u0435\u0434\u0430\u0432\u0448\u0438\u0439 \u043f\u0440\u0430\u0432\u0430 \u043d\u043e\u0432\u043e\u043c\u0443 \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0430\u044e\u0449\u0435\u043c\u0443 Jia Tan, \u0434\u0435\u044f\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u043f\u0440\u0438\u0432\u0435\u043b\u0430 \u043a \u0432\u043d\u0435\u0434\u0440\u0435\u043d\u0438\u044e \u0431\u044d\u043a\u0434\u043e\u0440\u0430, \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u043f\u0430\u043a\u0435\u0442\u0430 XZ Utils 5.2.13, 5.4.7 \u0438 5.6.2, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0443\u0434\u0430\u043b\u0435\u043d\u044b \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u044b \u0431\u044d\u043a\u0434\u043e\u0440\u0430 \u0438 \u043f\u0440\u043e\u0447\u0438\u0435 \u043f\u043e\u0434\u043e\u0437\u0440\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f, \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0435 \u0432 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0435 \u0432\u0440\u0435\u0434\u043e\u043d\u043e\u0441\u043d\u043e\u0439 \u0434\u0435\u044f\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u043f\u0440\u043e\u0448\u043b\u043e\u0433\u043e \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0430\u044e\u0449\u0435\u0433\u043e. \u041a\u0440\u043e\u043c\u0435 \u0442\u043e\u0433\u043e, \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d 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