{"id":114657,"date":"2024-03-30T00:25:55","date_gmt":"2024-03-29T22:25:55","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-kode-xz-versij-5-6-0-i-5-6-1-obnaruzhen-bekdor"},"modified":"2024-03-30T00:25:55","modified_gmt":"2024-03-29T22:25:55","slug":"v-kode-xz-versij-5-6-0-i-5-6-1-obnaruzhen-bekdor","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/v-kode-xz-versij-5-6-0-i-5-6-1-obnaruzhen-bekdor","title":{"rendered":"\u00c8 stato scoperto un backdoor nel codice delle versioni 5.6.0 e 5.6.1 di xz","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Lo sviluppatore Debian e ricercatore nel campo della sicurezza informatica Andres Freund ha segnalato la scoperta di un possibile backdoor nel codice sorgente delle versioni 5.6.0 e 5.6.1 di xz.<\/p>\n

<\/p>\n

Il backdoor \u00e8 costituito da una stringa in uno degli script m4<\/a>, che aggiunge codice malevolo offuscato alla fine dello script configure. Questo codice modifica poi uno dei Makefile generati del progetto, il che porta infine all'inclusione del codice malevolo (mascherato come archivio di test bad-3-corrupt_lzma2.xz) nel file binario liblzma.<\/p>\n

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

La peculiarit\u00e0 dell'incidente \u00e8 che il codice malevolo \u00e8 contenuto solo<\/em> negli archivi tar distribuiti contenenti il codice sorgente e non \u00e8 presente nel repository git del progetto.<\/p>\n

Si segnala che la persona sotto il cui nome il codice malevolo \u00e8 stato aggiunto al repository del progetto \u00e8 o direttamente coinvolta nell'accaduto, o \u00e8 stata vittima di una grave compromissione dei propri account personali (ma il ricercatore inclina verso la prima opzione, poich\u00e9 questa persona ha partecipato personalmente a diverse discussioni riguardanti le modifiche malevole).<\/p>\n

Nel suo rapporto, il ricercatore osserva che l'obiettivo finale del backdoor sembra essere l'iniezione di codice nel processo sshd e la sostituzione del codice di verifica delle chiavi RSA, e fornisce diversi modi per controllare indirettamente se il codice malevolo \u00e8 attualmente in esecuzione sul sistema.<\/p>\n

<\/p>\n

Secondo un articolo di notizie del progetto openSUSE<\/a>, a causa della complessit\u00e0 del codice del backdoor e del presunto meccanismo di sfruttamento, \u00e8 difficile stabilire se sia mai stato 'attivato' su questa macchina, e raccomanda una reinstallazione completa del sistema operativo con la rotazione di tutte le chiavi rilevanti su tutte le macchine che hanno mai avuto versioni infette di xz.<\/p>\n

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

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

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Il backdoor consiste in una riga di uno degli script m4, che aggiunge codice malevolo offuscato alla fine dello script configure. Questo codice modifica quindi uno dei Makefile generati dal progetto, portando infine a","canonical_url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/v-kode-xz-versij-5-6-0-i-5-6-1-obnaruzhen-bekdor","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"it_IT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0412 \u043a\u043e\u0434\u0435 xz \u0432\u0435\u0440\u0441\u0438\u0439 5.6.0 \u0438 5.6.1 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d \u0431\u044d\u043a\u0434\u043e\u0440 | ProHoster","og:description":"\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a Debian \u0438 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u0432 \u0441\u0444\u0435\u0440\u0435 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 Andres Freund \u0441\u043e\u043e\u0431\u0449\u0430\u0435\u0442 \u043e\u0431 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0438\u0438 \u0432\u0435\u0440\u043e\u044f\u0442\u043d\u043e\u0433\u043e \u0431\u044d\u043a\u0434\u043e\u0440\u0430 \u0432 \u0438\u0441\u0445\u043e\u0434\u043d\u043e\u043c \u043a\u043e\u0434\u0435 xz \u0432\u0435\u0440\u0441\u0438\u0439 5.6.0 \u0438 5.6.1. \u0411\u044d\u043a\u0434\u043e\u0440 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u0441\u043e\u0431\u043e\u0439 \u0441\u0442\u0440\u043e\u0447\u043a\u0443 \u0432 \u043e\u0434\u043d\u043e\u043c \u0438\u0437 m4-\u0441\u043a\u0440\u0438\u043f\u0442\u043e\u0432, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0434\u043e\u043f\u0438\u0441\u044b\u0432\u0430\u0435\u0442 \u043e\u0431\u0444\u0443\u0441\u0446\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u0432\u0440\u0435\u0434\u043e\u043d\u043e\u0441\u043d\u044b\u0439 \u043a\u043e\u0434 \u0432 \u043a\u043e\u043d\u0435\u0446 \u0441\u043a\u0440\u0438\u043f\u0442\u0430 configure. \u042d\u0442\u043e\u0442 \u043a\u043e\u0434 \u0437\u0430\u0442\u0435\u043c \u043c\u043e\u0434\u0438\u0444\u0438\u0446\u0438\u0440\u0443\u0435\u0442 \u043e\u0434\u0438\u043d \u0438\u0437 \u0441\u0433\u0435\u043d\u0435\u0440\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 Makefile \u043f\u0440\u043e\u0435\u043a\u0442\u0430, \u0447\u0442\u043e \u0432 \u043a\u043e\u043d\u0435\u0447\u043d\u043e\u043c \u0438\u0442\u043e\u0433\u0435 \u043f\u0440\u0438\u0432\u043e\u0434\u0438\u0442 \u043a","og:url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/v-kode-xz-versij-5-6-0-i-5-6-1-obnaruzhen-bekdor","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2024-03-29T22:25:55+00:00","article:modified_time":"2024-03-29T22:25:55+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts\/114657","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/comments?post=114657"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts\/114657\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/media?parent=114657"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/categories?post=114657"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/tags?post=114657"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}