{"id":101245,"date":"2021-09-10T22:22:37","date_gmt":"2021-09-10T20:22:37","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-ghostscript-ekspluatiruemaya-cherez-imagemagick"},"modified":"2021-09-10T22:22:37","modified_gmt":"2021-09-10T20:22:37","slug":"uyazvimost-v-ghostscript-ekspluatiruemaya-cherez-imagemagick","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/uyazvimost-v-ghostscript-ekspluatiruemaya-cherez-imagemagick","title":{"rendered":"Ghostscript'is tuvastatud haavatavus, mida kasutatakse ImageMagicki kaudu.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Ghostscriptis, dokumentide t\u00f6\u00f6tlemise, konverteerimise ja genereerimise t\u00f6\u00f6riistade komplekt, leidis t\u00f5sise haavatavuse (CVE-2021-3781), mis v\u00f5imaldab t\u00e4ita juhuslikku koodi spetsiaalselt vormindatud faili t\u00f6\u00f6tlemisel. Probleemist p\u00f6\u00f6ras t\u00e4helepanu Emil Lerner, kes r\u00e4\u00e4kis haavatavusest 25. augustil Peterburis toimunud konverentsil ZeroNights X (ettekandes r\u00e4\u00e4giti, kuidas Emil kasutab haavatavust bug bounty programmide raames, et teenida preemiaid r\u00fcnnakute demonstreerimise eest AirBNB, Dropboxi ja Yandex.Nice'i teenustes). <\/p>\n

5. septembril ilmus avalikult t\u00f6\u00f6kordaja, mis v\u00f5imaldab r\u00fcnnata s\u00fcsteeme, kus on Ubuntu 20.04, edastades serveril t\u00f6\u00f6tavale veebiskriptile, mis kasutab php-imagemagick paketti, spetsiaalselt vormindatud dokumenti, mis on \u00fcles laaditud pildi n\u00e4ol. Eelnevad andmed n\u00e4itavad, et selline t\u00f6\u00f6kordaja oli k\u00e4imas juba m\u00e4rtsist. Teatati, et r\u00fcnnak on v\u00f5imalik GhostScript 9.50 s\u00fcsteemide suhtes, kuid selgus, et haavatavus esineb ka k\u00f5igis j\u00e4rgnevas versioonis GhostScript, sealhulgas arenduses oleva v\u00e4ljaande 9.55 puhul Gitist. <\/p>\n

Parandus pakuti v\u00e4lja 8. septembril ning p\u00e4rast \u00fclevaatamist v\u00f5eti see vastu GhostScripti hoidlasse 9. septembril. Paljudes levitamistes on probleem endiselt lahendamata (uuenduste avaldamise staatust saab vaadata Debian, Ubuntu, Fedora, SUSE, RHEL, Arch Linux, FreeBSD, NetBSD lehtedel). GhostScripti versiooni, mis k\u00f5rvaldab haavatavuse, kavatsetakse v\u00e4lja anda kuu l\u00f5puks. <\/p>\n

\u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c\u044e \u043e\u0431\u0445\u043e\u0434\u0430 \u0440\u0435\u0436\u0438\u043c\u0430 \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u0438 «-dSAFER» \u0438\u0437-\u0437\u0430 \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u043e\u0432 Postscript-\u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430 «%pipe%», \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0432\u0448\u0438\u0445 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0445 shell-\u043a\u043e\u043c\u0430\u043d\u0434. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0434\u043b\u044f \u0437\u0430\u043f\u0443\u0441\u043a\u0430 \u0443\u0442\u0438\u043b\u0438\u0442\u044b id \u0432 \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0435 \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u0443\u043a\u0430\u0437\u0430\u0442\u044c \u0441\u0442\u0440\u043e\u043a\u0443 «(%pipe%\/tmp\/&id)(w)file» \u0438\u043b\u0438 «(%pipe%\/tmp\/;id)(r)file». <\/p>\n

Tuletakse meelde, et Ghostscripti haavatavused kujutavad endast suurt ohtu, sest seda paketti kasutatakse paljudes populaarsetes rakendustes PostScripti ja PDF-formaatide t\u00f6\u00f6tlemiseks. N\u00e4iteks kutsutakse Ghostscripti esile t\u00f6\u00f6laua miniatuuri loomise, taustal andmete indekseerimise ja piltide konverteerimise protsessis. Eduka r\u00fcnnaku jaoks piisab sageli lihtsalt faili laadimisest, mis sisaldab eksploitatsiooni, v\u00f5i selle katalooge vaatamisest failihalduris, mis toetab dokumentide eelvaateid, n\u00e4iteks Nautilus. <\/p>\n

Ghostscripti haavatavusi saab kasutada ka ImageMagicki ja GraphicsMagicki pildit\u00f6\u00f6tlusprogrammide kaudu, edastades neile JPEG- v\u00f5i PNG-faili, milles pole pildi asemel PostScripti kood (sellist faili t\u00f6\u00f6deldakse Ghostscriptis, kuna MIME-t\u00fc\u00fcp tuvastatakse sisu j\u00e4rgi, mitte faililaiendi alusel).
\n
Allikas: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 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, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2021-3781), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0439 \u043a\u043e\u0434 \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\u043e\u0433\u043e \u0444\u0430\u0439\u043b\u0430. \u0418\u0437\u043d\u0430\u0447\u0430\u043b\u044c\u043d\u043e \u043d\u0430 \u043d\u0430\u043b\u0438\u0447\u0438\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u043e\u0431\u0440\u0430\u0442\u0438\u043b \u0432\u043d\u0438\u043c\u0430\u043d\u0438\u0435 \u042d\u043c\u0438\u043b\u044c \u041b\u0435\u0440\u043d\u0435\u0440, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u0430\u043b \u043e\u0431 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 25 \u0430\u0432\u0433\u0443\u0441\u0442\u0430 \u043d\u0430 \u043f\u0440\u043e\u0448\u0435\u0434\u0448\u0435\u0439 \u0432 \u0421\u0430\u043d\u043a\u0442-\u041f\u0435\u0442\u0435\u0440\u0431\u0443\u0440\u0433\u0435 \u043a\u043e\u043d\u0444\u0435\u0440\u0435\u043d\u0446\u0438\u0438 ZeroNights X (\u0432 \u0434\u043e\u043a\u043b\u0430\u0434\u0435 \u0431\u044b\u043b\u043e \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u0430\u043d\u043e, \u043a\u0430\u043a \u042d\u043c\u0438\u043b\u044c […]<\/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-101245","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\udd47Ghostscripti haavatavus, mida saab kasutada ImageMagicki kaudu | ProHoster","description":"Ghostscriptis, dokumentide t\u00f6\u00f6tlemiseks, muundamiseks ja genereerimiseks m\u00f5eldud t\u00f6\u00f6riistade kogum, on tuvastatud kriitiline 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\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, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2021-3781), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0439 \u043a\u043e\u0434 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