{"id":77984,"date":"2020-04-15T07:42:14","date_gmt":"2020-04-15T05:42:14","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-git-privodyashhaya-k-utechke-uchyotnyh-dannyh"},"modified":"2020-04-15T07:42:14","modified_gmt":"2020-04-15T05:42:14","slug":"uyazvimost-v-git-privodyashhaya-k-utechke-uchyotnyh-dannyh","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/uyazvimost-v-git-privodyashhaya-k-utechke-uchyotnyh-dannyh","title":{"rendered":"Vulnerabilit\u00e0 in Git che porta alla fuga di credenziali","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Pubblicato<\/a><\/noindex> Sono stati pubblicati aggiornamenti correttivi per il sistema di controllo delle versioni distribuito Git 2.26.1, 2.25.3, 2.24.2, 2.23.2, 2.22.3, 2.21.2, 2.20.3, 2.19.4, 2.18.3 e 2.17.4, nei quali \u00e8 stata risolta una vulnerabilit\u00e0<\/a><\/noindex> (CVE-2020-5260<\/a><\/noindex>) nel gestore «credential.helper<\/a><\/noindex>«, che porta all'invio di credenziali non al giusto host quando un client git si collega a un repository tramite un URL specificamente formattato, contenente un carattere di nuova riga. Questa vulnerabilit\u00e0 pu\u00f2 essere sfruttata per inviare credenziali da un altro host a un server controllato dall'attaccante. <\/p>\n

Specificando un URL del tipo «https:\/\/evil.com?host=github.com\/», il gestore di credenziali durante la connessione all'host evil.com trasferir\u00e0 i parametri di autenticazione definiti per github.com. Il problema si manifesta durante operazioni come «git clone», inclusa la gestione di URL per sottomoduli (ad esempio, durante l'esecuzione di «git submodule update», verranno automaticamente trattati gli URL definiti nel file .gitmodules del repository). La vulnerabilit\u00e0 rappresenta il maggior rischio nelle situazioni in cui lo sviluppatore clona un repository senza vedere l'URL, come nel caso del lavoro con sottomoduli, o in sistemi che eseguono azioni automatiche, come gli script di compilazione dei pacchetti.<\/p>\n

Per bloccare la vulnerabilit\u00e0, nelle nuove versioni \u00e8 vietato<\/a><\/noindex> invocare caratteri di nuova riga in qualsiasi valore trasmesso tramite il protocollo di scambio delle credenziali. Per controllare il rilascio di aggiornamenti dei pacchetti per le distribuzioni, \u00e8 possibile consultare le pagine Debian<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, RHEL<\/a><\/noindex>, SUSE\/openSUSE<\/a><\/noindex>, Fedora<\/a><\/noindex>, Arch<\/a><\/noindex>, FreeBSD<\/a><\/noindex>.<\/p>\n

Come soluzione alternativa per bloccare il problema si raccomanda<\/a><\/noindex> non utilizzare credential.helper per accedere a repository pubblici e non eseguire «git clone» in modalit\u00e0 «—recurse-submodules» con repository non verificati. Per disabilitare completamente il gestore credential.helper, che esegue il salvataggio<\/a><\/noindex> e il recupero delle password dal cache<\/a><\/noindex>, protetta archivio esterno, idonei<\/a><\/noindex> o da un file di password, \u00e8 possibile utilizzare i comandi:<\/p>\n

git config —unset credential.helper
\n git config —global —unset credential.helper
\n git config —system —unset credential.helper<\/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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