{"id":102221,"date":"2021-11-06T03:36:40","date_gmt":"2021-11-06T01:36:40","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/zahvat-kontrolya-nad-uyazvimymi-serverami-gitlab-dlya-vovlecheniya-v-provedenie-ddos-atak"},"modified":"2021-11-06T03:36:40","modified_gmt":"2021-11-06T01:36:40","slug":"zahvat-kontrolya-nad-uyazvimymi-serverami-gitlab-dlya-vovlecheniya-v-provedenie-ddos-atak","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/zahvat-kontrolya-nad-uyazvimymi-serverami-gitlab-dlya-vovlecheniya-v-provedenie-ddos-atak","title":{"rendered":"Compromissione di server vulnerabili di GitLab per coinvolgerli in attacchi DDoS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

GitLab ha avvisato gli utenti di un aumento dell'attivit\u00e0 degli hacker legata all'esploitazione di una vulnerabilit\u00e0 critica CVE-2021-22205, che consente di eseguire il proprio codice sul server che utilizza la piattaforma per la collaborazione nello sviluppo GitLab senza autenticazione. <\/p>\n

Il problema si manifesta in GitLab a partire dalla versione 11.9 ed \u00e8 stato risolto gi\u00e0 ad aprile nelle versioni GitLab 13.10.3, 13.9.6 e 13.8.8. Tuttavia, secondo una scansione effettuata il 31 ottobre su 60.000 istanze pubblicamente accessibili di GitLab, il 50% dei sistemi continua a utilizzare versioni obsolete di GitLab vulnerabili. Solo il 21% delle istanze esaminate ha ricevuto gli aggiornamenti necessari. server<\/a>, mentre il numero di versione utilizzato non \u00e8 stato possibile determinarlo nel 29% dei sistemi. <\/p>\n

La negligenza degli amministratori dei server GitLab nell'installazione degli aggiornamenti ha portato all'attiva sfruttamento della vulnerabilit\u00e0 da parte di hacker, che hanno iniziato a pubblicare su server<\/a> malware e collegarli all'operazione di un botnet che partecipa a attacchi DDoS. Durante il picco, il volume di traffico generato dal botnet basato su server vulnerabili GitLab durante un attacco DDoS ha raggiunto i 1 terabit al secondo. <\/p>\n

La vulnerabilit\u00e0 \u00e8 causata da una gestione errata dei file immagine caricati da un parser esterno basato sulla libreria ExifTool. La vulnerabilit\u00e0 in ExifTool (CVE-2021-22204) consentiva l'esecuzione di comandi arbitrari nel sistema durante l'analisi dei metadati da file in formato DjVu: (metadata \t (Copyright «\ » . qx{echo test >\/tmp\/test} . \ » b «) ) <\/p>\n

Inoltre, poich\u00e9 il formato effettivo veniva determinato in ExifTool dal tipo MIME del contenuto e non dall'estensione del file, l'attaccante poteva caricare un documento DjVu con un exploit spacciato per una normale immagine JPG o TIFF (GitLab chiama ExifTool per tutti i file con estensioni jpg, jpeg e tiff per rimuovere i tag superflui). Esempio di exploit. Nella configurazione di GitLab CE, per impostazione predefinita, l'attacco pu\u00f2 essere condotto inviando due richieste che non richiedono l'autenticazione.

\"Compromissione<\/center> <\/p>\n

Si raccomanda agli utenti di GitLab di assicurarsi di utilizzare la versione pi\u00f9 recente e, in caso di utilizzo di una versione obsoleta, di applicare urgentemente gli aggiornamenti. Se ci\u00f2 non fosse possibile per qualche motivo, si consiglia di applicare selettivamente una patch che impedisca l'emergere della vulnerabilit\u00e0. Gli utenti dei sistemi non aggiornati sono anche invitati a verificare che il loro sistema non sia stato compromesso, analizzando i log e controllando la presenza di account sospetti degli aggressori (ad esempio, dexbcx, dexbcx818, dexbcxh, dexbcxi e dexbcxa99).
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f GitLab \u043f\u0440\u0435\u0434\u0443\u043f\u0440\u0435\u0434\u0438\u043b\u0430 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u043e\u0431 \u0443\u0432\u0435\u043b\u0438\u0447\u0435\u043d\u0438\u0438 \u0430\u043a\u0442\u0438\u0432\u043d\u043e\u0441\u0442\u0438 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u043e\u0432, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u043e\u0439 \u0441 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0435\u0439 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 CVE-2021-22205, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u0431\u0435\u0437 \u043f\u0440\u043e\u0445\u043e\u0436\u0434\u0435\u043d\u0438\u044f \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u0441\u0432\u043e\u0439 \u043a\u043e\u0434 \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0435, \u043d\u0430 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0430 \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u043d\u043e\u0439 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 GitLab. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432 GitLab \u043d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 \u0432\u0435\u0440\u0441\u0438\u0438 11.9 \u0438 \u0431\u044b\u043b\u0430 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0435\u0449\u0451 \u0432 \u0430\u043f\u0440\u0435\u043b\u0435 \u0432 \u0432\u044b\u043f\u0443\u0441\u043a\u0430\u0445 GitLab 13.10.3, 13.9.6 \u0438 13.8.8. \u0422\u0435\u043c […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":102222,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-102221","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-novosti-interneta"],"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\udd47Controllo dei server GitLab vulnerabili per coinvolgerli in attacchi DDoS | ProHoster","description":"GitLab ha avvisato gli utenti di un aumento dell'attivit\u00e0 degli aggressori legata all'exploit di una vulnerabilit\u00e0 critica CVE-2021-22205, che consente l'esecuzione remota del proprio codice sul server che utilizza la piattaforma GitLab per la collaborazione nello sviluppo. Il problema si manifesta su GitLab a partire dalla versione 11.9 ed \u00e8 stato risolto gi\u00e0 ad aprile nelle versioni GitLab 13.10.3, 13.9.6 e 13.8.8.","canonical_url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/zahvat-kontrolya-nad-uyazvimymi-serverami-gitlab-dlya-vovlecheniya-v-provedenie-ddos-atak","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\u0417\u0430\u0445\u0432\u0430\u0442 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044f \u043d\u0430\u0434 \u0443\u044f\u0437\u0432\u0438\u043c\u044b\u043c\u0438 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