{"id":73477,"date":"2020-03-10T02:42:04","date_gmt":"2020-03-09T23:42:04","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-timeshift-pozvolyayushhaya-podnyat-svoi-privilegii-v-sisteme"},"modified":"2020-03-10T02:42:04","modified_gmt":"2020-03-09T23:42:04","slug":"uyazvimost-v-timeshift-pozvolyayushhaya-podnyat-svoi-privilegii-v-sisteme","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/uyazvimost-v-timeshift-pozvolyayushhaya-podnyat-svoi-privilegii-v-sisteme","title":{"rendered":"Vulnerabilit\u00e0 in Timeshift che consente di aumentare i privilegi nel sistema","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Nell'applicazione <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/teejee2008\/timeshift\">Timeshift<\/a><\/noindex> identificata <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2020\/03\/06\/3\">vulnerabilit\u00e0<\/a><\/noindex> (<noindex><a rel=\"nofollow\" href=\"https:\/\/security-tracker.debian.org\/tracker\/CVE-2020-10174\">CVE-2020-10174<\/a><\/noindex>), che consente a un utente locale di eseguire codice con privilegi di root. Timeshift \u00e8 un sistema di backup che utilizza rsync con collegamenti duri o snapshot Btrfs per implementare funzionalit\u00e0 simili a Ripristino di sistema in Windows e Time Machine in macOS. Il programma \u00e8 presente nei repository di molte distribuzioni e viene utilizzato di default in PCLinuxOS e Linux Mint. La vulnerabilit\u00e0 \u00e8 stata corretta nella versione <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/teejee2008\/timeshift\/releases\/tag\/v20.03\">Timeshift 20.03<\/a><\/noindex>.<\/p>\n<p>Il problema \u00e8 causato da un funzionamento scorretto con la directory pubblica \/tmp. Durante la creazione di un backup, il programma crea la directory \/tmp\/timeshift, all'interno della quale viene creato un sottodirectory con un nome casuale, contenente uno script shell con comandi eseguiti con privilegi di root. Il sottodirectory con lo script ha un nome imprevedibile, ma la directory \/tmp\/timeshift \u00e8 prevedibile e non viene controllata per eventuali sostituzioni o per la creazione al suo posto di un link simbolico. L'attaccante pu\u00f2 creare a proprio nome la directory \/tmp\/timeshift, dopodich\u00e9 pu\u00f2 monitorare l'emergere del sottodirectory e sostituire tale sottodirectory e il file al suo interno. Durante il funzionamento, Timeshift eseguir\u00e0 uno script non generato dal programma con privilegi di root, ma un file sostituito dall'attaccante.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52509\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0438 Timeshift \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2020-10174), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root. Timeshift \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u0441\u043e\u0431\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u0443 \u0440\u0435\u0437\u0435\u0440\u0432\u043d\u043e\u0433\u043e \u043a\u043e\u043f\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0443\u044e rsync \u0441 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u043e\u0439 \u0436\u0451\u0441\u0442\u043a\u0438\u0445 \u0441\u0441\u044b\u043b\u043e\u043a \u0438\u043b\u0438 \u0441\u043d\u0430\u043f\u0448\u043e\u0442\u044b Btrfs \u0434\u043b\u044f \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u0438, \u043f\u043e\u0445\u043e\u0436\u0435\u0439 \u043d\u0430 System Restore \u0432 Windows \u0438 Time Machine \u0432 macOS. \u041f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0430 \u0432\u0445\u043e\u0434\u0438\u0442 \u0432 \u0440\u0435\u043f\u043e\u0437\u0438\u0442\u043e\u0440\u0438\u0438 \u043c\u043d\u043e\u0433\u0438\u0445 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u043e\u0432 \u0438 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0432 PCLinuxOS [&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-73477","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0438 Timeshift \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430\" \/>\n\t<meta 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