{"id":100021,"date":"2021-04-25T10:22:49","date_gmt":"2021-04-25T08:22:49","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-git-dlya-cygwin-pozvolyayushhaya-organizovat-vypolnenie-koda"},"modified":"2021-04-25T10:22:49","modified_gmt":"2021-04-25T08:22:49","slug":"uyazvimost-v-git-dlya-cygwin-pozvolyayushhaya-organizovat-vypolnenie-koda","status":"publish","type":"post","link":"https:\/\/prohoster.info\/de\/blog\/news\/uyazvimost-v-git-dlya-cygwin-pozvolyayushhaya-organizovat-vypolnenie-koda","title":{"rendered":"Sicherheitsanf\u00e4lligkeit in Git f\u00fcr Cygwin, die die Ausf\u00fchrung von Code erm\u00f6glicht","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>In Git wurde eine kritische Sicherheitsanf\u00e4lligkeit (CVE-2021-29468) entdeckt, die nur beim Bauen f\u00fcr die Umgebung Cygwin auftritt (eine Bibliothek zur Emulation der grundlegenden Linux-API in Windows und eine Sammlung von typischen Linux-Programmen f\u00fcr Windows). Die Sicherheitsanf\u00e4lligkeit erm\u00f6glicht die Ausf\u00fchrung von Angreifercode beim Abrufen von Daten (&quot;git checkout&quot;) aus einem vom Angreifer kontrollierten Repository. Das Problem wurde im Paket git 2.31.1-2 f\u00fcr Cygwin behoben. Im Hauptprojekt Git ist das Problem jedoch noch nicht behoben (es ist unwahrscheinlich, dass jemand Git f\u00fcr Cygwin selbst kompilieren w\u00fcrde, anstatt ein fertiges Paket zu verwenden).        <\/p>\n<p>Die Sicherheitsanf\u00e4lligkeit entsteht durch die Behandlung der Cygwin-Umgebung als unix\u00e4hnliches System und nicht als Windows, was dazu f\u00fchrt, dass es keine Einschr\u00e4nkungen bei der Verwendung des Zeichens &#8216;&#092;&#8217; im Pfad gibt, w\u00e4hrend dieses Zeichen sowohl in Cygwin als auch in Windows zur Trennung von Verzeichnissen verwendet werden kann. Folglich kann durch die Erstellung eines speziell modifizierten Repositories, das symbolische Links und Dateien mit dem R\u00fcckw\u00e4rtsschr\u00e4gstrich enth\u00e4lt, eine beliebige Datei \u00fcberschrieben werden, wenn dieses Repository in Cygwin geladen wird (eine \u00e4hnliche Sicherheitsanf\u00e4lligkeit in Git f\u00fcr Windows wurde 2019 behoben). Mit der M\u00f6glichkeit zur \u00dcberschreibung von Dateien kann der Angreifer Hook-Aufrufe in Git \u00fcberschreiben und die Ausf\u00fchrung beliebigen Codes im System erlangen.<br \/>\n<br \/>Quelle: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=55027\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 Git \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-2021-29468), \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u044e\u0449\u0430\u044f\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u043f\u0440\u0438 \u0441\u0431\u043e\u0440\u043a\u0435 \u0434\u043b\u044f \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f Cygwin (\u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 \u0434\u043b\u044f \u044d\u043c\u0443\u043b\u044f\u0446\u0438\u0438 \u0431\u0430\u0437\u043e\u0432\u043e\u0433\u043e Linux API \u0432 Windows \u0438 \u043d\u0430\u0431\u043e\u0440 \u0442\u0438\u043f\u043e\u0432\u044b\u0445 linux-\u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c \u0434\u043b\u044f Windows). \u0423\u044f\u0432\u0437\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u0430 \u043f\u0440\u0438 \u0438\u0437\u0432\u043b\u0435\u0447\u0435\u043d\u0438\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 (&#171;git checkout&#187;) \u0438\u0437 \u0440\u0435\u043f\u043e\u0437\u0438\u0442\u043e\u0440\u0438\u044f, \u043f\u043e\u0434\u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c\u043d\u043e\u0433\u043e \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u043c\u0443. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0432 \u043f\u0430\u043a\u0435\u0442\u0435 git 2.31.1-2 \u0434\u043b\u044f Cygwin. \u0412 \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u043c \u043f\u0440\u043e\u0435\u043a\u0442\u0435 Git \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u043e\u043a\u0430 [&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-100021","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 Git \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f 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