{"id":78706,"date":"2020-04-21T13:42:05","date_gmt":"2020-04-21T11:42:05","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-git-s-ustraneniem-eshhyo-odnoj-uyazvimosti"},"modified":"2020-04-21T13:42:05","modified_gmt":"2020-04-21T11:42:05","slug":"obnovlenie-git-s-ustraneniem-eshhyo-odnoj-uyazvimosti","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/obnovlenie-git-s-ustraneniem-eshhyo-odnoj-uyazvimosti","title":{"rendered":"Aggiornamento di Git con la correzione di un'altra vulnerabilit\u00e0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Pubblicati<\/a><\/noindex> correzioni per le versioni del sistema di gestione distribuito dei testi sorgente Git 2.26.2, 2.25.4, 2.24.3, 2.23.3, 2.22.4, 2.21.3, 2.20.4, 2.19.5, 2.18.4 e 2.17.5, in cui \u00e8 stata rimossa vulnerabilit\u00e0<\/a><\/noindex> (CVE-2020-11008<\/a><\/noindex>), simile a il problema<\/a><\/noindex>, risolta la settimana scorsa. La nuova vulnerabilit\u00e0 colpisce anche i gestori di «credential.helper» ed \u00e8 sfruttata durante la trasmissione di un URL appositamente formattato che contiene un carattere di nuova riga, un host vuoto o uno schema di richiesta non specificato. Quando si elabora un URL di questo tipo, credential.helper invia le informazioni delle credenziali che non corrispondono al protocollo o all'host richiesti.<\/p>\n

A differenza del problema precedente, sfruttando la nuova vulnerabilit\u00e0, l'attaccante non pu\u00f2 controllare direttamente l'host da cui vengono trasmesse le credenziali altrui. Le credenziali che trapelano dipendono dalle peculiarit\u00e0 dell'elaborazione del parametro mancante «host» in credential.helper. La questione \u00e8 che i campi vuoti nell'URL vengono interpretati da molti gestori di credential.helper come istruzioni per applicare a questa richiesta qualsiasi credenziale. Cos\u00ec, credential.helper pu\u00f2 inviare al server dell'attaccante le credenziali salvate per un altro server specificato nell'URL. <\/p>\n

Il problema si manifesta durante l'esecuzione di operazioni come «git clone» e «git fetch», ma \u00e8 particolarmente pericoloso durante l'elaborazione dei sottomodu\nti — eseguendo «git submodule update» vengono automaticamente elaborati URL definiti nel file .gitmodules del repository. Come soluzione per bloccare il problema, si raccomanda<\/a><\/noindex> non utilizzare credential.helper quando si accede a repository pubblici e non applicare «git clone» in modalit\u00e0 «—recurse-submodules» con repository non verificati. <\/p>\n

Le nuove versioni di Git una correzione<\/a><\/noindex> vietano la chiamata a credential.helper per URL che contengono valori imprevisti<\/a><\/noindex> (ad esempio, specificando tre barre invece di due — «http:\/\/\/host» o senza schema di protocollo — «http::ftp.example.com\/»). Il problema influisce sui gestori store (archiviazione integrata delle credenziali Git), cache (cache integrata delle credenziali inserite) e osxkeychain (archiviazione per macOS). Il gestore Git Credential Manager (archiviazione per Windows) non \u00e8 vulnerabile.<\/p>\n

\u00c8 possibile tenere traccia degli aggiornamenti dei pacchetti nelle distribuzioni sulle pagine Debian<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, RHEL<\/a><\/noindex>, SUSE\/openSUSE<\/a><\/noindex>, Fedora<\/a><\/noindex>, Arch<\/a><\/noindex>, ALT<\/a><\/noindex>, FreeBSD<\/a><\/noindex>.<\/p>\n

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

Fonte: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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[…]<\/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-78706","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\udd47Aggiornamento Git con la risoluzione di un'altra vulnerabilit\u00e0 | ProHoster","description":"Sono stati pubblicati aggiornamenti correttivi per le versioni del sistema di gestione distribuito dei testi sorgente Git 2.26.2, 2.25.4, 2.24.3, 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