{"id":142366,"date":"2025-09-05T11:11:57","date_gmt":"2025-09-05T09:11:57","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-lkrg-1-0-0-dlya-zashhity-ot-ekspluataczii-uyazvimostej-v-yadre-linux"},"modified":"2026-01-24T17:56:45","modified_gmt":"2026-01-24T15:56:45","slug":"vypusk-lkrg-1-0-0-dlya-zashhity-ot-ekspluataczii-uyazvimostej-v-yadre-linux","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/vypusk-lkrg-1-0-0-dlya-zashhity-ot-ekspluataczii-uyazvimostej-v-yadre-linux","title":{"rendered":"Rilascio di LKRG 1.0.0 per la protezione contro l'exploitation delle vulnerabilit\u00e0 nel kernel Linux","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Il progetto Openwall ha pubblicato il modulo del kernel LKRG 1.0.0 (Linux Kernel Runtime Guard), progettato per verificare l'integrit\u00e0 delle strutture del kernel e per rilevare tentativi di sfruttare vulnerabilit\u00e0 nel kernel. Si segnala che l'assegnazione del numero di versione 1.0.0 ha segnato il raggiungimento di uno stato maturo per il progetto. Il codice del progetto \u00e8 distribuito sotto licenza GPLv2.       <\/p>\n<p>Il modulo \u00e8 adatto sia per <a href=\"https:\/\/prohoster.info\/it\/zhashchita-ot-ddos\/\"  data-wpil-monitor-id=\"5\">la protezione dagli attacchi<\/a>manipolare vulnerabilit\u00e0 gi\u00e0 note nel kernel Linux, sia per contrastare exploit che utilizzano vulnerabilit\u00e0 ancora sconosciute, se non vengono adottate misure speciali per eludere LKRG. La protezione si basa sulla rilevazione di modifiche non autorizzate al kernel in esecuzione (verifica dell'integrit\u00e0) e sul monitoraggio delle modifiche ai privilegi dei processi utente (rilevazione d'uso degli exploit).     <\/p>\n<p>Il controllo dell'integrit\u00e0 viene eseguito confrontando gli hash calcolati per le aree di memoria e le strutture dati pi\u00f9 importanti del kernel, come l'IDT (Interrupt Descriptor Table), MSR, le tabelle delle chiamate di sistema, tutte le procedure e funzioni, i gestori di interruzioni, le liste dei moduli caricati, il contenuto della sezione  dei moduli e gli attributi dei processi. La procedura di verifica viene attivata periodicamente tramite un timer o al verificarsi di determinati eventi nel kernel, ad esempio durante l'esecuzione delle chiamate di sistema setuid, setreuid, fork, exit, execve e do_init_module.    <\/p>\n<p>La rilevazione di possibili exploit e il blocco degli attacchi avviene in fase precedente all'accesso alle risorse da parte del kernel (ad esempio, prima di aprire un file), ma dopo che il processo ha ottenuto privilegi non autorizzati (ad esempio, cambio di UID). In caso di comportamento non autorizzato dei processi, viene forzato il loro termine, il che \u00e8 sufficiente per bloccare molti exploit. I costi operativi del modulo sono stimati tra il 2 e il 2.5%.      <\/p>\n<p>Il supporto \u00e8 garantito per sistemi con architetture x86-64, AArch64 (ARM64), ARM32 e x86. Il funzionamento di LKRG 1.0.0 \u00e8 stato testato con kernel di diverse distribuzioni, a partire dal kernel 3.10 di RHEL\/CentOS 7 fino al 6.17-rc4 del repository in preparazione del rilascio di Fedora 44. I pacchetti sono disponibili per le distribuzioni ALT Linux, Arch Linux, Astra Linux, Gentoo, Guix, NixOS, Rocky Linux, Whonix, Yocto e OpenBMC. I pacchetti creati per Rocky Linux possono essere utilizzati su RHEL 8\/9 e distribuzioni derivate come AlmaLinux 8\/9, nonch\u00e9 pacchetti per Whonix su Debian e Ubuntu.      <\/p>\n<p>Tra le modifiche nella nuova versione:  <\/p>\n<ul>\n<li class=\"l\"> \u00c8 garantita la compatibilit\u00e0 con i kernel Linux fino alla versione 6.17-rc4.\n<li class=\"l\"> Con l'uso di kernel a partire dalla versione 6.13 \u00e8 cessato il monitoraggio delle chiamate remote override_creds() e revert_creds(), il che ha limitato la rilevazione di attacchi che sovrascrivono il puntatore cred. Le limitazioni sono state tentate di compensare attraverso l'aggiunta di controlli di sovrascrittura del puntatore cred in altre parti del kernel.\n<li class=\"l\"> \u00c8 cessato il monitoraggio eccessivo delle credenziali per le quali non viene eseguita la verifica dell'integrit\u00e0. Questa modifica ha permesso di ridurre la base di codice di circa 1500 righe.\n<li class=\"l\"> \u00c8 stato aggiunto il supporto per il meccanismo introdotto nel kernel Linux 6.10 per creare file temporanei nel file system OverlayFS, utilizzando l'opzione O_TMPFILE (ovl_tmpfile). Il supporto fornito \u00e8 necessario per prevenire falsi positivi che si manifestano durante l'uso di contenitori isolati su sistemi con kernel 6.10-6.12.\n<li class=\"l\"> Per i sistemi x86_64 \u00e8 stato aggiunto il supporto per la tecnologia Intel CET (Control-flow Enforcement Technology) per proteggere il codice eseguibile utilizzando istruzioni IBT (indirect branch tracking), nonch\u00e9 una protezione software kCFI (kernel Control Flow Integrity) per bloccare le violazioni dell'ordine normale di esecuzione (control flow) a causa di exploit che alterano i puntatori a funzione memorizzati in memoria.\n<li class=\"l\"> Per l'integrazione di molti gestori, invece di kretprobes, \u00e8 stato utilizzato il meccanismo kprobes, che semplifica il codice di impostazione degli hook e permette di ottenere prestazioni superiori.\n<li class=\"l\"> \u00c8 stata riprogettata la gestione dei lock (blocchi) dei dati specifici per processo (per-task shadow data). Escludendo i lock non necessari, \u00e8 stata aumentata la velocit\u00e0 di accesso a tali dati.\n<li class=\"l\"> Sono stati risolti bug che portavano a condizioni di gara, problemi di verifica dell'integrit\u00e0 e falsi positivi.\n<li class=\"l\"> \u00c8 stato migliorato il supporto per la compilazione utilizzando Clang.  <\/ul>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=63827\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u0440\u043e\u0435\u043a\u0442 Openwall \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u043c\u043e\u0434\u0443\u043b\u044c \u044f\u0434\u0440\u0430 LKRG 1.0.0 (Linux Kernel Runtime Guard), \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u044b\u0439 \u0434\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0446\u0435\u043b\u043e\u0441\u0442\u043d\u043e\u0441\u0442\u0438 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440 \u044f\u0434\u0440\u0430 \u0438 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f \u043f\u043e\u043f\u044b\u0442\u043e\u043a \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 \u044f\u0434\u0440\u0435. \u041e\u0442\u043c\u0435\u0447\u0430\u0435\u0442\u0441\u044f, \u0447\u0442\u043e \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d\u0438\u0435 \u043d\u043e\u043c\u0435\u0440\u0430 \u0432\u0435\u0440\u0441\u0438\u0438 1.0.0 \u043e\u0437\u043d\u0430\u043c\u0435\u043d\u043e\u0432\u0430\u043b\u043e \u0434\u043e\u0441\u0442\u0438\u0436\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u043c \u0437\u0440\u0435\u043b\u043e\u0433\u043e \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u044f. \u041a\u043e\u0434 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 GPLv2. \u041c\u043e\u0434\u0443\u043b\u044c \u043f\u043e\u0434\u0445\u043e\u0434\u0438\u0442 \u043a\u0430\u043a \u0434\u043b\u044f \u0437\u0430\u0449\u0438\u0442\u044b \u043e\u0442 \u0430\u0442\u0430\u043a, \u043c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u0443\u044e\u0449\u0438\u0445 \u0443\u0436\u0435 \u0438\u0437\u0432\u0435\u0441\u0442\u043d\u044b\u043c\u0438 \u0443\u0437\u044f\u0432\u0438\u043c\u043e\u0441\u0442\u044f\u043c\u0438 \u0432 \u044f\u0434\u0440\u0435 Linux, [&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-142366","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u0440\u043e\u0435\u043a\u0442 Openwall \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u043c\u043e\u0434\u0443\u043b\u044c \u044f\u0434\u0440\u0430 LKRG 1.0.0 (Linux Kernel Runtime Guard), \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u044b\u0439 \u0434\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0446\u0435\u043b\u043e\u0441\u0442\u043d\u043e\u0441\u0442\u0438 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di LKRG 1.0.0 per la protezione contro l'exploitation delle vulnerabilit\u00e0 nel kernel Linux | ProHoster","description":"Il progetto Openwall ha pubblicato il modulo del kernel LKRG 1.0.0 (Linux Kernel Runtime Guard), progettato per verificare l'integrit\u00e0 delle strutture del kernel e per rilevare tentativi di sfruttare vulnerabilit\u00e0 nel kernel. 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