{"id":184253,"date":"2026-11-13T17:41:21","date_gmt":"2026-11-13T15:41:21","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/ataki-na-prilozheniya-ispolzuyushhie-imagemagick-v-konfiguraczii-po-umolchaniyu"},"modified":"2026-11-13T17:41:42","modified_gmt":"2026-11-13T15:41:42","slug":"attacks-on-applications-using-imagemagick-with-default-settings","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/attacks-on-applications-using-imagemagick-with-default-settings","title":{"rendered":"Atacurile asupra aplica\u021biilor care folosesc ImageMagick \u00een configura\u021bia implicit\u0103","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Centrul Coordonator CERT (grupul de interven\u021bie pentru situa\u021bii de urgen\u021b\u0103 \u00een informatic\u0103) a publicat un avertisment cu privire la identificarea unor vulnerabilit\u0103\u021bi care afecteaz\u0103 aplica\u021biile \u0219i site-urile care utilizeaz\u0103 biblioteca ImageMagick \u00een configura\u021bia implicit\u0103 pentru procesarea sau conversia imaginilor. Exploatarea cu succes permite atacatorului s\u0103 citeasc\u0103 \u0219i s\u0103 scrie fi\u0219iere, \u00een limita permisiunilor sub care ruleaz\u0103 ImageMagick. Vulnerabilit\u0103\u021bilor le-a fost atribuit un nume de cod \u2013 ImageTragick2, similar cu problema identificat\u0103 \u00een 2016. <\/p>\n<p>\u00cen ultimele dou\u0103 luni, \u00een ImageMagick au fost corectate aproximativ o sut\u0103 de vulnerabilit\u0103\u021bi, dar problemele despre care avertizeaz\u0103 CERT sunt cauzate nu de erori \u00een codul ImageMagick, ci de utilizarea set\u0103rilor implicite care permit apelarea procesorilor externi pentru formatele SVG \u0219i PostScript.<br \/>\nProcesorul din ImageMagick este selectat \u00een func\u021bie de con\u021binut, nu de extensia fi\u0219ierului, astfel \u00eenc\u00e2t, dac\u0103 aplica\u021bia filtreaz\u0103 \u00eenc\u0103rc\u0103rile \u00een func\u021bie de extensii, atacatorul poate transmite date \u00een formatele SVG sau PostScript, de exemplu, sub forma unor fi\u0219iere cu extensia JPEG sau PNG. <\/p>\n<p>Posibilitatea exploat\u0103rii vulnerabilit\u0103\u021bii a fost confirmat\u0103 \u00een aplica\u021bii bazate pe Ruby on Rails \u0219i WordPress, dar nu este exclus\u0103 \u0219i \u00een alte proiecte care utilizeaz\u0103 ImageMagick pentru conversia imaginilor, decupare \u0219i crearea de miniaturi, cum ar fi MediaWiki, ownCloud Classic \u0219i Redmine. Problema afecteaz\u0103 \u0219i instrumentele AI care apeleaz\u0103 ImageMagick \u00een timpul sarcinilor legate de procesarea imaginilor.<\/p>\n<p>Sunt prezentate dou\u0103 scenarii de atac:<\/p>\n<ul>\n<li class=\"l\"> Apelarea unui handler de con\u021binut \u00een limbaj MSL (Magick Scripting Language) prin transmiterea unei imagini SVG special formatate, \u00een care elementul  con\u021bine un link &#171;xlink:href&#187; c\u0103tre o resurs\u0103 cu protocolul &#171;MSL:&#187;. ImageMagick interpreteaz\u0103 con\u021binutul acestei resurse ca un script \u00een limbaj MSL, av\u00e2nd \u00een vedere c\u0103 \u00een scripturile MSL sunt permise opera\u021bii de scriere \u0219i citire a fi\u0219ierelor. Pe l\u00e2ng\u0103 MSL, o truc similar cu SVG poate fi utilizat \u0219i pentru procesarea altor tipuri de con\u021binut periculos.\n<li class=\"l\"> Apelarea interpretului Ghostscript pentru procesarea con\u021binutului \u00een format PostScript. Ghostscript este lansat cu flagul &#171;-dSAFER&#187;, care nu limiteaz\u0103 accesul la directorul \/tmp, permi\u021b\u00e2nd atacatorului s\u0103 citeasc\u0103 sau s\u0103 modifice fi\u0219iere \u00een acest director (de exemplu, aplica\u021biile pot stoca temporar \u00een \/tmp datele sesiunilor \u0219i fi\u0219ierele \u00eenc\u0103rcate). \u00cen Ghostscript se g\u0103sesc de asemenea \u00een mod regulat vulnerabilit\u0103\u021bi care permit ocolirea complet\u0103 a restric\u021biei &#171;-dSAFER&#187; (cea mai recent\u0103 vulnerabilitate a fost dezv\u0103luit\u0103 pe 10 noiembrie).\n<\/ul>\n<p>Pentru a bloca vulnerabilit\u0103\u021bile, nu este suficient s\u0103 actualiz\u0103m ImageMagick, ci este necesar\u0103 modificarea set\u0103rilor \u00een fi\u0219ierul \/etc\/ImageMagick\/policy.xml, \u00een care trebuie s\u0103 p\u0103str\u0103m doar suportul pentru cele mai necesare formate \u0219i opera\u021biuni sau, cel pu\u021bin, s\u0103 interzicem apelarea procesatorilor externi pentru formate MSL, MVG, PS, EPS \u0219i PDF. \u00cen plus, se recomand\u0103 izolarea codului pentru conversia imaginilor externe \u00eentr-un container separat, verificarea fi\u0219ierelor nu doar dup\u0103 extensie, ci \u0219i dup\u0103 con\u021binut, \u0219i configurarea monitoriz\u0103rii jurnalelor ImageMagick pentru erori \u0219i activitate neobi\u0219nuit\u0103.<\/p>\n<p>   &lt;policy domain=&#187;coder&#187; rights=&#187;none&#187; pattern=&#187;MSL&#187;\/&gt;<br \/>\n   &lt;policy domain=&#187;delegate&#187; rights=&#187;none&#187; pattern=&#187;gs&#187;\/&gt;<br \/>\n   &lt;policy domain=&#187;coder&#187; rights=&#187;none&#187; pattern=&#187;{PS,PS2,PS3,EPS,EPS2,EPS3,EPI,EPSF,EPSI,EPT,EPT2,EPT3,PDF,AI,EPDF,PDFA,POCKETMOD,XPS,PCL}&#187;\/&gt;<br \/>\n<br \/>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=66679\">opennet.ro<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u043e\u043e\u0440\u0434\u0438\u043d\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0439 \u0446\u0435\u043d\u0442\u0440 CERT (\u043a\u043e\u043c\u043f\u044c\u044e\u0442\u0435\u0440\u043d\u0430\u044f \u0433\u0440\u0443\u043f\u043f\u0430 \u0440\u0435\u0430\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043d\u0430 \u0447\u0440\u0435\u0437\u0432\u044b\u0447\u0430\u0439\u043d\u044b\u0435 \u0441\u0438\u0442\u0443\u0430\u0446\u0438\u0438), \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u043f\u0440\u0435\u0434\u0443\u043f\u0440\u0435\u0436\u0434\u0435\u043d\u0438\u0435 \u043e \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u044e\u0449\u0438\u0445 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f \u0438 \u0441\u0430\u0439\u0442\u044b, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0438\u0435 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0443 ImageMagick \u0432 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u0438 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0434\u043b\u044f \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0438\u043b\u0438 \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. \u0423\u0441\u043f\u0435\u0448\u043d\u0430\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u043c\u0443 \u0447\u0438\u0442\u0430\u0442\u044c \u0438 \u0437\u0430\u043f\u0438\u0441\u044b\u0432\u0430\u0442\u044c \u0444\u0430\u0439\u043b\u044b, \u043d\u0430\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u043f\u0440\u0430\u0432\u0430 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043f\u043e\u0434 \u043a\u043e\u0442\u043e\u0440\u044b\u043c\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u0442\u0441\u044f ImageMagick. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044f\u043c \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d\u043e \u043a\u043e\u0434\u043e\u0432\u043e\u0435 \u0438\u043c\u044f ImageTragick2, \u043f\u043e \u0430\u043d\u0430\u043b\u043e\u0433\u0438\u0438 \u0441 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u043e\u0439, [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-184253","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.5 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041a\u043e\u043e\u0440\u0434\u0438\u043d\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0439 \u0446\u0435\u043d\u0442\u0440 CERT (\u043a\u043e\u043c\u043f\u044c\u044e\u0442\u0435\u0440\u043d\u0430\u044f \u0433\u0440\u0443\u043f\u043f\u0430 \u0440\u0435\u0430\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043d\u0430 \u0447\u0440\u0435\u0437\u0432\u044b\u0447\u0430\u0439\u043d\u044b\u0435 \u0441\u0438\u0442\u0443\u0430\u0446\u0438\u0438), 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\u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0438\u0435 ImageMagick \u0432 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u0438 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e | ProHoster","og:description":"\u041a\u043e\u043e\u0440\u0434\u0438\u043d\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0439 \u0446\u0435\u043d\u0442\u0440 CERT (\u043a\u043e\u043c\u043f\u044c\u044e\u0442\u0435\u0440\u043d\u0430\u044f \u0433\u0440\u0443\u043f\u043f\u0430 \u0440\u0435\u0430\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043d\u0430 \u0447\u0440\u0435\u0437\u0432\u044b\u0447\u0430\u0439\u043d\u044b\u0435 \u0441\u0438\u0442\u0443\u0430\u0446\u0438\u0438), \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u043f\u0440\u0435\u0434\u0443\u043f\u0440\u0435\u0436\u0434\u0435\u043d\u0438\u0435 \u043e \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u044e\u0449\u0438\u0445 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f \u0438 \u0441\u0430\u0439\u0442\u044b, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0438\u0435 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0443 ImageMagick 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