{"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\/en\/blog\/news\/uyazvimost-v-ghostscript-pozvolyayushhaya-vypolnit-kod-pri-otkrytii-postscript-dokumenta","title":{"rendered":"A vulnerability in Ghostscript allows for code execution when opening a PostScript document.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

In Ghostscript, a toolkit for processing, converting, and generating documents in PostScript and PDF formats, identified<\/a><\/noindex> vulnerability (CVE-2020-15900<\/a><\/noindex>), which can lead to file modifications and arbitrary command execution when opening specially crafted PostScript documents. The use of a non-standard PostScript operator in the document rsearch<\/a><\/noindex> can trigger a uint32_t overflow when calculating size, rewriting memory areas outside the allocated buffer, and accessing files in the file system, which can be exploited to launch an attack that executes arbitrary code on the system (for example, by adding commands to ~\/.bashrc or ~\/.profile).<\/p>\n

The issue affects releases<\/a><\/noindex> from 9.50 to 9.52 (the bug has been present<\/a><\/noindex> starting from release 9.28rc1, but, according to data<\/a><\/noindex> researchers who identified the vulnerability, appears from version 9.50).<\/p>\n

A fix has been proposed in the release 9.52.1<\/a><\/noindex> (patch<\/a><\/noindex>). Package updates with the fix have already been issued for Debian<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, openSUSE<\/a><\/noindex>. The packages in SUSE\/openSUSE<\/a><\/noindex> are not affected by the issues.<\/p>\n

It should be noted that vulnerabilities in Ghostscript pose a heightened risk, as this package is used in many popular applications for processing PostScript and PDF formats. For instance, Ghostscript is invoked during thumbnail creation on the desktop, during background data indexing, and when converting images. In many cases, a successful attack may only require uploading a file with an exploit or viewing a directory containing it in Nautilus. Vulnerabilities in Ghostscript can also be exploited via image handlers based on ImageMagick and GraphicsMagick by passing a JPEG or PNG file that contains PostScript code instead of an image (this file will be processed in Ghostscript since the MIME type is recognized by content rather than relying on the extension).<\/p>\n

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

Source: 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 \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, 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