{"id":106652,"date":"2023-02-06T18:48:11","date_gmt":"2023-02-06T16:48:12","guid":{"rendered":"https:\/\/prohoster.info\/?p=106652"},"modified":"2023-02-07T12:08:50","modified_gmt":"2023-02-07T10:08:50","slug":"uyazvimost-v-imagemagick-privodyashhaya-k-utechke-soderzhimogo-lokalnyh-fajlov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/uyazvimost-v-imagemagick-privodyashhaya-k-utechke-soderzhimogo-lokalnyh-fajlov","title":{"rendered":"Zranitelnost v ImageMagick zp\u016fsobuj\u00edc\u00ed \u00fanik obsahu m\u00edstn\u00edch soubor\u016f.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V bal\u00ed\u010dku ImageMagick, kter\u00fd je \u010dasto pou\u017e\u00edv\u00e1n webov\u00fdmi v\u00fdvoj\u00e1\u0159i k p\u0159evodu obr\u00e1zk\u016f, byla zji\u0161t\u011bna zranitelnost CVE-2022-44268, kter\u00e1 m\u016f\u017ee v\u00e9st k \u00faniku obsahu soubor\u016f p\u0159i p\u0159evodu pomoc\u00ed PNG obr\u00e1zk\u016f p\u0159ipraven\u00fdch \u00fato\u010dn\u00edkem. Zranitelnost ohro\u017euje syst\u00e9my, kter\u00e9 zpracov\u00e1vaj\u00ed extern\u00ed obr\u00e1zky a pak umo\u017e\u0148uj\u00ed nahr\u00e1n\u00ed v\u00fdsledk\u016f p\u0159evodu. <\/p>\n

Zranitelnost je zp\u016fsobena t\u00edm, \u017ee p\u0159i zpracov\u00e1n\u00ed PNG obr\u00e1zku ImageMagick pou\u017e\u00edv\u00e1 obsah parametru \u201eprofile\u201c z bloku metadat k ur\u010den\u00ed n\u00e1zvu souboru s profilem, kter\u00fd se p\u0159ipojuje k v\u00fdstupn\u00edmu souboru. K proveden\u00ed \u00fatoku sta\u010d\u00ed p\u0159idat k PNG obr\u00e1zku parametr \u201eprofile\u201c s pot\u0159ebnou cestou k souboru (nap\u0159\u00edklad \u201e\/etc\/passwd\u201c) a p\u0159i zpracov\u00e1n\u00ed takov\u00e9ho obr\u00e1zku, nap\u0159\u00edklad p\u0159i zm\u011bn\u011b velikosti obr\u00e1zku, bude do v\u00fdstupn\u00edho souboru zahrnut obsah po\u017eadovan\u00e9ho souboru. Pokud je m\u00edsto n\u00e1zvu souboru uvedeno \u201e-\u201c, obsluha se zasekne v o\u010dek\u00e1v\u00e1n\u00ed vstupu ze standardn\u00edho proudu, co\u017e lze vyu\u017e\u00edt k proveden\u00ed odm\u00edtnut\u00ed slu\u017eby (CVE-2022-44267). <\/p>\n

Oprava zranitelnosti dosud nebyla vyd\u00e1na, ale v\u00fdvoj\u00e1\u0159i ImageMagick doporu\u010dili jako obch\u00e1zej\u00edc\u00ed opat\u0159en\u00ed pro zablokov\u00e1n\u00ed \u00faniku vytvo\u0159it v nastaven\u00ed pravidlo, kter\u00e9 omez\u00ed p\u0159\u00edstup k ur\u010dit\u00fdm cest\u00e1m k soubor\u016fm. Nap\u0159\u00edklad pro z\u00e1kaz p\u0159\u00edstupu dle absolutn\u00edch a relativn\u00edch cest lze do policy.xml p\u0159idat: <policy domain=»path» rights=»none» pattern=»2F*» \/> <policy domain=»path» rights=»none» pattern=»..2F*» \/> <\/p>\n

Ve ve\u0159ejn\u00e9 sf\u00e9\u0159e ji\u017e byl zve\u0159ejn\u011bn skript na vytv\u00e1\u0159en\u00ed exploita\u010dn\u00edch PNG obr\u00e1zk\u016f.

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

\u0412 \u043f\u0430\u043a\u0435\u0442\u0435 ImageMagick, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0447\u0430\u0441\u0442\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f web-\u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0430\u043c\u0438 \u0434\u043b\u044f \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0438\u0437\u043e\u0431\u0440\u0430\u0436\u0435\u043d\u0438\u0439, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c CVE-2022-44268, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u0443\u0442\u0435\u0447\u043a\u0435 \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0433\u043e \u0444\u0430\u0439\u043b\u043e\u0432 \u0432 \u0441\u043b\u0443\u0447\u0430\u0435 \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 ImageMagick \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d\u043d\u044b\u0445 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u043c PNG-\u0438\u0437\u043e\u0431\u0440\u0430\u0436\u0435\u043d\u0438\u0439. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0433\u0440\u043e\u0436\u0430\u0435\u0442 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u043c, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043e\u0431\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u044e\u0442 \u0432\u043d\u0435\u0448\u043d\u0438\u0435 \u0438\u0437\u043e\u0431\u0440\u0430\u0436\u0435\u043d\u0438\u044f \u0438 \u0437\u0430\u0442\u0435\u043c \u0434\u0430\u044e\u0442 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u0433\u0440\u0443\u0437\u0438\u0442\u044c \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u043d\u0438\u044f. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u0442\u0435\u043c, \u0447\u0442\u043e \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 PNG-\u0438\u0437\u043e\u0431\u0440\u0430\u0436\u0435\u043d\u0438\u044f ImageMagick \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442 \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0435 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0430 «profile» 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p\u0159i p\u0159evodu.","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/news\/uyazvimost-v-imagemagick-privodyashhaya-k-utechke-soderzhimogo-lokalnyh-fajlov","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"cs_CZ","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 ImageMagick, \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u0443\u0442\u0435\u0447\u043a\u0435 \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0433\u043e \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u044b\u0445 \u0444\u0430\u0439\u043b\u043e\u0432 | ProHoster","og:description":"\u0412 \u043f\u0430\u043a\u0435\u0442\u0435 ImageMagick, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0447\u0430\u0441\u0442\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f web-\u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0430\u043c\u0438 \u0434\u043b\u044f \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0438\u0437\u043e\u0431\u0440\u0430\u0436\u0435\u043d\u0438\u0439, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c CVE-2022-44268, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u0443\u0442\u0435\u0447\u043a\u0435 \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0433\u043e \u0444\u0430\u0439\u043b\u043e\u0432 \u0432 \u0441\u043b\u0443\u0447\u0430\u0435 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\u043f\u0440\u0438.","og:url":"https:\/\/prohoster.info\/cs\/blog\/news\/uyazvimost-v-imagemagick-privodyashhaya-k-utechke-soderzhimogo-lokalnyh-fajlov","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2023-02-06T16:48:12+00:00","article:modified_time":"2023-02-07T10:08:50+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/106652","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/comments?post=106652"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/106652\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media\/106653"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media?parent=106652"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/categories?post=106652"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/tags?post=106652"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}