I rsync, v\u00e6rkt\u00f8jet til filsynkronisering og backup, er der fundet en s\u00e5rbarhed (CVE-2022-29154), som tillader, at man ved at tilg\u00e5 en rsync-server kontrolleret af en angriber kan skrive eller overskrive vilk\u00e5rlige filer i den m\u00e5lrettede mappe p\u00e5 brugerens side. Angrebet kan potentielt ogs\u00e5 udf\u00f8res som f\u00f8lge af et mand-ved-mand (MITM) angreb i den transittrafik mellem klienten og den legitime server. Problemet er blevet l\u00f8st i testudgivelsen Rsync 3.2.5pre1. <\/p>\n
S\u00e5rbarheden minder om tidligere problemer i SCP og skyldes ogs\u00e5, at serveren beslutter placeringen af den skrevne fil, mens klienten ikke korrekt tjekker, hvad der gives af serveren mod det, der blev anmodet om, hvilket g\u00f8r det muligt server<\/a> at skrive filer, der oprindeligt ikke blev anmodet om af klienten. For eksempel, n\u00e5r brugeren kopierer filer til sin hjemme-mappe, server<\/a> kan det i stedet for de anmodede filer udlevere filer med navne som .bash_aliases eller .ssh\/authorized_keys, og de vil blive gemt i brugerens hjemme-mappe. \u0412 rsync, \u0443\u0442\u0438\u043b\u0438\u0442\u0435 \u0434\u043b\u044f \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0444\u0430\u0439\u043b\u043e\u0432 \u0438 \u0440\u0435\u0437\u0435\u0440\u0432\u043d\u043e\u0433\u043e \u043a\u043e\u043f\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-29154), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u0438 \u043a rsync-\u0441\u0435\u0440\u0432\u0435\u0440\u0443, \u043f\u043e\u0434\u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c\u043d\u043e\u043c\u0443 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u0443, \u0437\u0430\u043f\u0438\u0441\u0430\u0442\u044c \u0438\u043b\u0438 \u043f\u0435\u0440\u0435\u0437\u0430\u043f\u0438\u0441\u0430\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0435 \u0444\u0430\u0439\u043b\u044b \u0432 \u0446\u0435\u043b\u0435\u0432\u043e\u043c \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u0435 \u043d\u0430 \u0441\u0442\u043e\u0440\u043e\u043d\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f. \u041f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u0430\u0442\u0430\u043a\u0430 \u0442\u0430\u043a\u0436\u0435 \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u0441\u043e\u0432\u0435\u0440\u0448\u0435\u043d\u0430 \u0432 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0435 \u0432\u043c\u0435\u0448\u0430\u0442\u0435\u043b\u044c\u0441\u0442\u0432\u0430 (MITM) \u0432 \u0442\u0440\u0430\u043d\u0437\u0438\u0442\u043d\u044b\u0439 \u0442\u0440\u0430\u0444\u0438\u043a \u043c\u0435\u0436\u0434\u0443 \u043a\u043b\u0438\u0435\u043d\u0442\u043e\u043c \u0438 \u043b\u0435\u0433\u0438\u0442\u0438\u043c\u043d\u044b\u043c \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u043c. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0432 \u0442\u0435\u0441\u0442\u043e\u0432\u043e\u043c \u0432\u044b\u043f\u0443\u0441\u043a\u0435 Rsync 3.2.5pre1. […]<\/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-104759","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\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\udd47S\u00e5rbarhed i Rsync, der tillader overskrivning af filer p\u00e5 klientsiden | ProHoster","description":"I rsync, v\u00e6rkt\u00f8jet til filsynkronisering og backup, er der fundet en s\u00e5rbarhed (CVE-2022-29154), som tillader, at man ved at tilg\u00e5 en rsync-server kontrolleret af en angriber kan skrive eller 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Kilde: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"