{"id":37676,"date":"2019-10-31T22:18:59","date_gmt":"2019-10-31T19:18:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/ocherednye-4-uyazvimosti-v-ghostscript\/"},"modified":"2019-10-31T22:18:59","modified_gmt":"2019-10-31T19:18:59","slug":"ocherednye-4-uyazvimosti-v-ghostscript","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/ocherednye-4-uyazvimosti-v-ghostscript","title":{"rendered":"\u010eal\u0161ie 4 zranite\u013enosti v Ghostscript","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Po dvoch t\u00fd\u017ed\u0148och od objavenia<\/a><\/noindex> minulej kritickej chyby v Ghostscript<\/a><\/noindex> Boli identifikovan\u00e9<\/a><\/noindex> \u010fal\u0161ie 4 podobn\u00e9 zranite\u013enosti (CVE-2019-14811, CVE-2019-14812, CVE-2019-14813, CVE-2019-14817), ktor\u00e9 umo\u017e\u0148uj\u00fa cez vytvorenie odkazu na «.forceput» ob\u00eds\u0165 re\u017eim izol\u00e1cie «-dSAFER». Pri spracovan\u00ed \u0161peci\u00e1lne form\u00e1tovan\u00fdch dokumentov \u00fato\u010dn\u00edk m\u00f4\u017ee z\u00edska\u0165 pr\u00edstup k obsahu FS a dosiahnu\u0165 vykonanie \u013eubovo\u013en\u00e9ho k\u00f3du v syst\u00e9me (napr\u00edklad prostredn\u00edctvom pridania pr\u00edkazov do ~\\\/ .bashrc alebo ~\\\/ .profile). Oprava je dostupn\u00e1 vo forme z\u00e1plat.1<\/a><\/noindex>, 2<\/a><\/noindex>). Sledovanie vydania aktualiz\u00e1ci\u00ed bal\u00ed\u010dkov v distrib\u00faci\u00e1ch m\u00f4\u017eete vidie\u0165 na t\u00fdchto str\u00e1nkach: Debian<\/a><\/noindex>, Fedora<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, SUSE\/openSUSE<\/a><\/noindex>, RHEL<\/a><\/noindex>, Arch<\/a><\/noindex>, ROSA<\/a><\/noindex>, FreeBSD<\/a><\/noindex>. <\/p>\n

Pripom\u00edname, \u017ee zranite\u013enosti v Ghostscript predstavuj\u00fa zv\u00fd\u0161en\u00e9 nebezpe\u010denstvo, preto\u017ee tento bal\u00edk sa pou\u017e\u00edva v mnoh\u00fdch popul\u00e1rnych aplik\u00e1ci\u00e1ch na spracovanie form\u00e1tov PostScript a PDF. Napr\u00edklad, Ghostscript je volan\u00e9 pri vytv\u00e1ran\u00ed miniat\u00far na pracovnej ploche, pri pozad\u00ed indexovan\u00ed \u00fadajov a pri konverzii obr\u00e1zkov. Na \u00faspe\u0161n\u00fd \u00fatok je v mnoh\u00fdch pr\u00edpadoch dos\u0165 jednoducho nahra\u0165 s\u00fabor s exploitom alebo prezera\u0165 adres\u00e1r s n\u00edm v aplik\u00e1cii Nautilus. Zranite\u013enosti v Ghostscript je tie\u017e mo\u017en\u00e9 zneu\u017ei\u0165 prostredn\u00edctvom spracovate\u013eov obr\u00e1zkov zalo\u017een\u00fdch na bal\u00edkoch ImageMagick a GraphicsMagick, odovzdan\u00edm JPEG alebo PNG s\u00faboru, v ktorom namiesto obr\u00e1zka je k\u00f3d PostScript (tak\u00fd s\u00fabor bude spracovan\u00fd v Ghostscript, preto\u017ee MIME typ je rozpozn\u00e1van\u00fd pod\u013ea obsahu, nie na z\u00e1klade pr\u00edpony).<\/p>\n

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

\u0421\u043f\u0443\u0441\u0442\u044f \u0434\u0432\u0435 \u043d\u0435\u0434\u0435\u043b\u0438 \u0441 \u043c\u043e\u043c\u0435\u043d\u0442\u0430 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0448\u043b\u043e\u0439 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0432 Ghostscript \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u0435\u0449\u0451 4 \u043f\u043e\u0445\u043e\u0436\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2019-14811, CVE-2019-14812, CVE-2019-14813, CVE-2019-14817), \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u0447\u0435\u0440\u0435\u0437 \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0435 \u0441\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 «.forceput» \u043e\u0431\u043e\u0439\u0442\u0438 \u0440\u0435\u0436\u0438\u043c \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u0438 «-dSAFER». 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