{"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\/en\/blog\/news\/uyazvimost-v-git-dlya-cygwin-pozvolyayushhaya-organizovat-vypolnenie-koda","title":{"rendered":"A vulnerability in Git for Cygwin allows for code execution.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A critical vulnerability (CVE-2021-29468) has been identified in Git, which appears only when building for the Cygwin environment (a library for emulating the basic Linux API on Windows along with a set of standard Linux programs for Windows). The vulnerability allows an attacker to execute code when retrieving data (\"git checkout\") from a repository controlled by the attacker. The issue has been resolved in the git 2.31.1-2 package for Cygwin. However, the problem is not yet fixed in the main Git project (it\u2019s unlikely that anyone manually builds git for Cygwin instead of using a pre-built package). <\/p>\n

The vulnerability is caused by handling the Cygwin environment as a Unix-like system rather than Windows, leading to the absence of restrictions on using the character '\u2019' in paths, whereas in Cygwin, as in Windows, this character can be used to separate directories. Consequently, by creating a specially modified repository containing symbolic links and files with the backslash character, arbitrary files can be overwritten when this repository is loaded in Cygwin (a similar vulnerability in Git for Windows was fixed in 2019). The ability to overwrite files allows an attacker to redefine hook calls in git and execute arbitrary code in the system.
\n
Source: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\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 («git checkout») \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 […]<\/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\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47A vulnerability in Git for Cygwin allows for code execution | ProHoster","description":"A critical vulnerability in Git (CVE-2021-29468) has been identified, manifesting only when compiled for the Cygwin environment (a library for emulating the basic Linux API on Windows and a set of standard Linux programs for 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