{"id":37147,"date":"2019-10-31T22:16:00","date_gmt":"2019-10-31T19:16:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novaya-uyazvimost-v-ghostscript\/"},"modified":"2019-10-31T22:16:00","modified_gmt":"2019-10-31T19:16:00","slug":"novaya-uyazvimost-v-ghostscript","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/novaya-uyazvimost-v-ghostscript","title":{"rendered":"Nov\u00e1 zranitelnost v Ghostscript","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Ned\u00e1vn\u00e9 vlny zranitelnost\u00ed (1<\/a><\/noindex>, 2<\/a><\/noindex>, 3<\/a><\/noindex>, 4<\/a><\/noindex>, 5<\/a><\/noindex>, 6<\/a><\/noindex>) v Ghostscript<\/a><\/noindex>, sad\u011b n\u00e1stroj\u016f pro zpracov\u00e1n\u00ed, konverzi a generov\u00e1n\u00ed dokument\u016f ve form\u00e1tech PostScript a PDF. Stejn\u011b jako p\u0159edchoz\u00ed zranitelnosti nov\u00fd probl\u00e9m<\/a><\/noindex> (CVE-2019-10216<\/a><\/noindex>) umo\u017e\u0148uje p\u0159i zpracov\u00e1n\u00ed speci\u00e1ln\u011b form\u00e1tovan\u00fdch dokument\u016f obej\u00edt re\u017eim izolace «-dSAFER» (p\u0159es manipulace s «.buildfont1») a z\u00edskat p\u0159\u00edstup k obsahu FSS, co\u017e lze vyu\u017e\u00edt k organizaci \u00fatoku na proveden\u00ed libovoln\u00e9ho k\u00f3du v syst\u00e9mu (nap\u0159\u00edklad prost\u0159ednictv\u00edm p\u0159id\u00e1n\u00ed p\u0159\u00edkaz\u016f do ~\\\/._bashrc nebo ~\\\/._profile). Oprava je dostupn\u00e1 ve form\u011b patche<\/a><\/noindex>. Sledovat vyd\u00e1n\u00ed aktualizac\u00ed bal\u00ed\u010dk\u016f v distribuc\u00edch lze na n\u00e1sleduj\u00edc\u00edch str\u00e1nk\u00e1ch: Debian<\/a><\/noindex>, Fedora<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, SUSE\/openSUSE<\/a><\/noindex>, RHEL<\/a><\/noindex>, Arch<\/a><\/noindex>, FreeBSD<\/a><\/noindex>. <\/p>\n

P\u0159ipom\u00edn\u00e1me, \u017ee zranitelnosti v Ghostscript p\u0159edstavuj\u00ed zv\u00fd\u0161en\u00e9 riziko, proto\u017ee tento bal\u00ed\u010dek se pou\u017e\u00edv\u00e1 v mnoha popul\u00e1rn\u00edch aplikac\u00edch pro zpracov\u00e1n\u00ed form\u00e1t\u016f PostScript a PDF. Nap\u0159\u00edklad Ghostscript je vol\u00e1no p\u0159i vytv\u00e1\u0159en\u00ed miniatur na pracovn\u00ed plo\u0161e, p\u0159i pozad\u00ed indexace dat a p\u0159i p\u0159evodu obr\u00e1zk\u016f. Pro \u00fasp\u011b\u0161n\u00fd \u00fatok je \u010dasto dostate\u010dn\u00e9 pouze nahr\u00e1t soubor s exploit a prohl\u00e9dnout si adres\u00e1\u0159 s n\u00edm v Nautilus. Zranitelnosti v Ghostscript lze tak\u00e9 zneu\u017e\u00edt prost\u0159ednictv\u00edm zpracovatel\u016f obr\u00e1zk\u016f zalo\u017een\u00fdch na bal\u00edc\u00edch ImageMagick a GraphicsMagick, tak \u017ee se do nich p\u0159ed\u00e1 JPEG nebo PNG soubor, ve kter\u00e9m je m\u00edsto obr\u00e1zku k\u00f3d PostScript (takov\u00fd soubor bude zpracov\u00e1n v Ghostscript, proto\u017ee MIME typ je rozpozn\u00e1v\u00e1n podle obsahu, nikoliv podle p\u0159\u00edpony). <\/p>\n

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

\u041d\u0435 \u043f\u0440\u0435\u043a\u0440\u0430\u0449\u0430\u0435\u0442\u0441\u044f \u0447\u0435\u0440\u0435\u0434\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 (1, 2, 3, 4, 5, 6) \u0432 Ghostscript, \u043d\u0430\u0431\u043e\u0440\u0435 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u043e\u0432 \u0434\u043b\u044f \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438, \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0438 \u0433\u0435\u043d\u0435\u0440\u0430\u0446\u0438\u0438 \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u043e\u0432 \u0432 \u0444\u043e\u0440\u043c\u0430\u0442\u0430\u0445 PostScript \u0438 PDF. \u041a\u0430\u043a \u0438 \u043f\u0440\u043e\u0448\u043b\u044b\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043d\u043e\u0432\u0430\u044f \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 (CVE-2019-10216) \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u043e\u0432 \u043e\u0431\u043e\u0439\u0442\u0438 \u0440\u0435\u0436\u0438\u043c \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u0438 «-dSAFER» (\u0447\u0435\u0440\u0435\u0437 \u043c\u0430\u043d\u0438\u043f\u0443\u043b\u044f\u0446\u0438\u0438 \u0441 «.buildfont1») \u0438 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0434\u043e\u0441\u0442\u0443\u043f \u043a \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u043c\u0443 \u0424\u0421, \u0447\u0442\u043e \u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c 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