{"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\/de\/blog\/novosti-interneta\/uyazvimost-v-ghostscript-pozvolyayushhaya-vypolnit-kod-pri-otkrytii-postscript-dokumenta","title":{"rendered":"Eine Schwachstelle in Ghostscript erm\u00f6glicht die Ausf\u00fchrung von Code beim \u00d6ffnen eines PostScript-Dokuments.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Ghostscript, ein Toolset zur Verarbeitung, Umwandlung und Generierung von Dokumenten in den Formaten PostScript und PDF, <noindex><a rel=\"nofollow\" href=\"https:\/\/insomniasec.com\/blog\/ghostscript-cve-2020-15900\">wurde<\/a><\/noindex> eine Schwachstelle (<noindex><a rel=\"nofollow\" href=\"https:\/\/security-tracker.debian.org\/tracker\/CVE-2020-15900\">CVE-2020-15900<\/a><\/noindex>), das m\u00f6glicherweise zu \u00c4nderungen von Dateien und zur Ausf\u00fchrung willk\u00fcrlicher Befehle beim \u00d6ffnen speziell gestalteter Dokumente im PostScript-Format f\u00fchren kann. Die Verwendung eines nicht standardm\u00e4\u00dfigen PostScript-Operators in einem Dokument <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/ArtifexSoftware\/ghostpdl\/blob\/master\/psi\/zstring.c#L109\">rsearch<\/a><\/noindex> f\u00fchrt zu einem uint32_t-\u00dcberlauf bei der Berechnung der Gr\u00f6\u00dfe, \u00fcberschreibt Speicherbereiche au\u00dferhalb des zugewiesenen Puffers und erm\u00f6glicht den Zugriff auf Dateien im Dateisystem, was f\u00fcr einen Angriff zur Ausf\u00fchrung von willk\u00fcrlichem Code im System verwendet werden kann (zum Beispiel durch Hinzuf\u00fcgen von Befehlen zu ~\/.bashrc oder ~\/.profile).<\/p>\n<p>Das Problem betrifft <noindex><a rel=\"nofollow\" href=\"https:\/\/www.ghostscript.com\/releases.html\">Versionen<\/a><\/noindex> von 9.50 bis 9.52 (Fehler <noindex><a rel=\"nofollow\" href=\"https:\/\/git.ghostscript.com\/?p=ghostpdl.git;a=commitdiff;h=7ecbfda92b4c8dbf6f6c2bf8fc82020a29219eff\">seit 2016 vorhanden<\/a><\/noindex> seit der Ver\u00f6ffentlichung 9.28rc1, aber, laut <noindex><a rel=\"nofollow\" href=\"https:\/\/insomniasec.com\/blog\/ghostscript-cve-2020-15900\">Daten<\/a><\/noindex> den forschenden Entdeckern der Schwachstelle, tritt es ab Version 9.50 auf).<\/p>\n<p> Die Fehlerbehebung wurde in der Version <noindex><a rel=\"nofollow\" href=\"https:\/\/git.ghostscript.com\/?p=ghostpdl.git;a=tag;h=6190b43f9d55027d0d88223b10868c6fd61a7da8\">9.52.1<\/a><\/noindex> (<noindex><a rel=\"nofollow\" href=\"https:\/\/git.ghostscript.com\/?p=ghostpdl.git;a=commitdiff;h=5d499272b95a6b890a1397e11d20937de000d31b\">Patch<\/a><\/noindex>). Paketupdates mit dem Fix wurden bereits f\u00fcr <noindex><a rel=\"nofollow\" href=\"https:\/\/security-tracker.debian.org\/tracker\/CVE-2020-15900\">Debian<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/ubuntu.com\/security\/notices\/USN-4445-1\">Ubuntu<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/lists.opensuse.org\/opensuse-security-announce\/2020-08\/msg00004.html\">SUSE<\/a><\/noindex>ausgegeben. Pakete in <noindex><a rel=\"nofollow\" href=\"https:\/\/access.redhat.com\/security\/cve\/cve-2020-15900\">RHEL<\/a><\/noindex> sind nicht betroffen.<\/p>\n<p>Es ist wichtig zu beachten, dass Sicherheitsanf\u00e4lligkeiten in Ghostscript ein erhebliches Risiko darstellen, da dieses Paket in vielen g\u00e4ngigen Anwendungen zur Verarbeitung von PostScript- und PDF-Formaten verwendet wird. Zum Beispiel wird Ghostscript w\u00e4hrend des Erstellens von Miniaturansichten auf dem Desktop, bei der Hintergrundindizierung von Daten und bei der Bildkonvertierung aufgerufen. F\u00fcr einen erfolgreichen Angriff reicht es in vielen F\u00e4llen aus, einfach eine Datei mit einem Exploit hochzuladen oder ein Verzeichnis mit dieser Datei im Nautilus zu durchsuchen. Die Sicherheitsanf\u00e4lligkeiten in Ghostscript k\u00f6nnen auch \u00fcber Bildverarbeiter auf Basis von ImageMagick und GraphicsMagick ausgenutzt werden, indem eine JPEG- oder PNG-Datei \u00fcbergeben wird, die anstelle eines Bildes PostScript-Code enth\u00e4lt (solche Dateien werden in Ghostscript verarbeitet, da der MIME-Typ anhand des Inhalts und nicht auf der Grundlage der Dateiendung erkannt wird).<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Quelle: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53480\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\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 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2020-15900), \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044e \u0444\u0430\u0439\u043b\u043e\u0432 \u0438 \u0437\u0430\u043f\u0443\u0441\u043a\u0443 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0445 \u043a\u043e\u043c\u0430\u043d\u0434 \u043f\u0440\u0438 \u043e\u0442\u043a\u0440\u044b\u0442\u0438\u0438 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u043e\u0432 \u0432 \u0444\u043e\u0440\u043c\u0430\u0442\u0435 PostScript. \u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0432 \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0435 \u043d\u0435\u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u043e\u0433\u043e PostScript-\u043e\u043f\u0435\u0440\u0430\u0442\u043e\u0440\u0430 rsearch \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0442\u0438\u043f\u0430 uint32_t \u043f\u0440\u0438 \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0438 \u0440\u0430\u0437\u043c\u0435\u0440\u0430, \u043f\u0435\u0440\u0435\u043f\u0438\u0441\u0430\u0442\u044c \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u043f\u0430\u043c\u044f\u0442\u0438 \u0432\u043d\u0435 \u0432\u044b\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0433\u043e [&hellip;]<\/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-91251","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\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 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href=\"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/uyazvimost-v-ghostscript-pozvolyayushhaya-vypolnit-kod-pri-otkrytii-postscript-dokumenta\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"de_DE\" \/>\n\t\t<meta property=\"og:site_name\" content=\"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\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 Ghostscript, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 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