{"id":91251,"date":"2020-08-10T13:42:19","date_gmt":"2020-08-10T11:42:19","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-ghostscript-pozvolyayushhaya-vypolnit-kod-pri-otkrytii-postscript-dokumenta"},"modified":"2020-08-10T13:42:19","modified_gmt":"2020-08-10T11:42:19","slug":"uyazvimost-v-ghostscript-pozvolyayushhaya-vypolnit-kod-pri-otkrytii-postscript-dokumenta","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/uyazvimost-v-ghostscript-pozvolyayushhaya-vypolnit-kod-pri-otkrytii-postscript-dokumenta","title":{"rendered":"Haavatavus Ghostscriptis, mis v\u00f5imaldab koodi k\u00e4ivitamist PostScripti dokumendi avamisel.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Ghostscript on t\u00f6\u00f6riistade kogum, mis on m\u00f5eldud dokumentide t\u00f6\u00f6tlemiseks, konverteerimiseks ja genereerimiseks PostScripti ja PDF-formaatides. tuvastatud<\/a><\/noindex> haavatavus (CVE-2020-15900<\/a><\/noindex>), mis v\u00f5ib p\u00f5hjustada failide muutmist ja juhuslike k\u00e4skude k\u00e4ivitamist, kui avatakse spetsiaalselt kujundatud PostScripti dokumente. Dokumendis ebatavalise PostScripti operaatori kasutamine rsearch<\/a><\/noindex> v\u00f5imaldab tekitada uint32_t t\u00fc\u00fcbi \u00fclevoolu, kui arvutatakse suurust, kirjutada m\u00e4lu alasid v\u00e4lja eraldatud buffrist ning p\u00e4\u00e4seda juurde failidele failis\u00fcsteemis, mida saab kasutada r\u00fcnnaku korraldamiseks, et t\u00e4ita juhuslikku koodi s\u00fcsteemis (n\u00e4iteks lisades k\u00e4ske ~\\\/ .bashrc v\u00f5i ~\\\/ .profile).<\/p>\n

Probleem m\u00f5jutab v\u00e4ljaandeid<\/a><\/noindex> versioonidest 9.50 kuni 9.52 (viga ainult hiina keeles.<\/a><\/noindex> alates versioonist 9.28rc1, kuid, vastavalt andmete<\/a><\/noindex> haavatavuse avastanud teadlastele, ilmneb see alates versioonist 9.50).<\/p>\n

Parandus on ette n\u00e4htud versioonis 9.52.1<\/a><\/noindex> (pat\u0161<\/a><\/noindex>). Paranduste paketid on juba v\u00e4lja antud Debian<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, SUSE<\/a><\/noindex>. Paketid RHEL<\/a><\/noindex> ei ole probleemile vastuv\u00f5tlikud.<\/p>\n

Tuletame meelde, et haavatavused Ghostscripts kujutavad endast suurt ohtu, kuna seda paketti kasutatakse paljudes tuntud rakendustes PostScripti ja PDF-formaatide t\u00f6\u00f6tlemiseks. N\u00e4iteks kutsutakse Ghostscripti esile t\u00f6\u00f6laua miniat\u00fc\u00fcride loomisel, taustal andmete indekseerimisel ja piltide konverteerimise k\u00e4igus. Eduka r\u00fcnnaku korral piisab paljuski lihtsalt kurjategijaga faili \u00fcleslaadimisest v\u00f5i selle katalooge loetlemisest Nautiluses. Ghostscripti haavatavusi saab ka \u00e4ra kasutada pildit\u00f6\u00f6tluse k\u00e4itlejates, mis p\u00f5hinevad ImageMagicki ja GraphicsMagicki pakettidel, edastades neile JPEG- v\u00f5i PNG-faili, milles on PostScripti kood (selline fail t\u00f6\u00f6deldakse Ghostscriptis, kuna MIME-t\u00fc\u00fcp tuvastatakse selle sisu j\u00e4rgi, mitte ei tugine faililaiendile).<\/p>\n

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

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

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