{"id":105611,"date":"2022-11-17T15:36:54","date_gmt":"2022-11-17T13:36:54","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-samba-i-mit-heimdal-kerberos-privodyashhaya-k-perepolneniyu-bufera"},"modified":"2022-11-17T15:36:54","modified_gmt":"2022-11-17T13:36:54","slug":"uyazvimost-v-samba-i-mit-heimdal-kerberos-privodyashhaya-k-perepolneniyu-bufera","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/uyazvimost-v-samba-i-mit-heimdal-kerberos-privodyashhaya-k-perepolneniyu-bufera","title":{"rendered":"Vulnerabilit\u00e0 in Samba e MIT\/Heimdal Kerberos che provoca un overflow del buffer","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Sono stati pubblicati gli aggiornamenti correttivi per i pacchetti Samba 4.17.3, 4.16.7 e 4.15.12 che risolvono una vulnerabilit\u00e0 (CVE-2022-42898) nelle librerie Kerberos, che porta a un overflow di interi e alla scrittura di dati al di fuori del buffer allocato durante l'elaborazione dei parametri PAC (Privileged Attribute Certificate) inviati da un utente autenticato. \u00c8 possibile monitorare la pubblicazione degli aggiornamenti dei pacchetti nelle distribuzioni sulle seguenti pagine: Debian, Ubuntu, Gentoo, RHEL, SUSE, Arch, FreeBSD. <\/p>\n

Oltre a Samba, il problema si manifesta anche nei pacchetti con MIT Kerberos e Heimdal Kerberos. Nella relazione sulla vulnerabilit\u00e0 del progetto Samba la minaccia non \u00e8 dettagliata, ma nel report di MIT Kerberos \u00e8 indicato che la vulnerabilit\u00e0 potrebbe portare all'esecuzione remota di codice. L'exploitation della vulnerabilit\u00e0 \u00e8 possibile solo su sistemi a 32 bit. <\/p>\n

Il problema interessa le configurazioni con KDC (Key Distribution Center) o kadmind. Nelle configurazioni senza Active Directory, la vulnerabilit\u00e0 si manifesta anche nei file di Samba che utilizzano Kerberos. server<\/a> Il problema \u00e8 causato da un errore nella funzione krb5_parse_pac(), che porta a un calcolo errato della dimensione del buffer utilizzato per l'analisi dei campi PAC. Su sistemi a 32 bit, durante l'elaborazione di PAC appositamente formattati, l'errore potrebbe consentire di posizionare un blocco di 16 byte fornito dall'attaccante al di fuori del buffer allocato.
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Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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