{"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\/ro\/blog\/news\/zahvat-kontrolya-nad-uyazvimymi-serverami-gitlab-dlya-vovlecheniya-v-provedenie-ddos-atak","title":{"rendered":"Preluarea controlului asupra serverelor vulnerabile GitLab pentru implicarea \u00een realizarea atacurilor DDoS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Compania GitLab a avertizat utilizatorii cu privire la cre\u0219terea activit\u0103\u021bii infractorilor cibernetici, legat\u0103 de exploatarea unei vulnerabilit\u0103\u021bi critice CVE-2021-22205, care permite executarea de cod de la distan\u021b\u0103 pe serverul pe care este utilizat\u0103 platforma pentru dezvoltare colaborativ\u0103 GitLab, f\u0103r\u0103 a necesita autentificare. <\/p>\n

Problema apare \u00een GitLab \u00eencep\u00e2nd cu versiunea 11.9 \u0219i a fost remediat\u0103 \u00eenc\u0103 din aprilie \u00een versiunile GitLab 13.10.3, 13.9.6 \u0219i 13.8.8. Cu toate acestea, conform unei scan\u0103ri efectuate pe 31 octombrie \u00een \u00eentreaga re\u021bea global\u0103 din 60.000 de instan\u021be GitLab publice, 50% dintre sisteme continu\u0103 s\u0103 utilizeze versiuni \u00eenvechite ale GitLab, vulnerabile. Actualiz\u0103rile necesare au fost instalate doar pe 21% dintre cele verificate. servere<\/a>, iar pe 29% dintre sisteme nu a fost posibil\u0103 identificarea versiunii utilizate. <\/p>\n

Lipsa de responsabilitate a administratorilor serverelor GitLab \u00een ceea ce prive\u0219te instalarea actualiz\u0103rilor a dus la faptul c\u0103 vulnerabilitatea a \u00eenceput s\u0103 fie exploatat\u0103 activ de infractorii cibernetici, care au \u00eenceput s\u0103 plaseze pe servere<\/a> software mali\u021bios \u0219i s\u0103 le conecteze la un botnet implicat \u00een atacuri DDoS. V\u00e2rful de trafic \u00een timpul atacurilor DDoS generate de botnetul bazat pe serverele vulnerabile GitLab a atins 1 terabit pe secund\u0103. <\/p>\n

Vulnerabilitatea este cauzat\u0103 de o gestionare incorect\u0103 a fi\u0219ierelor de imagine \u00eenc\u0103rcate de un parser extern bazat pe biblioteca ExifTool. Vulnerabilitatea din ExifTool (CVE-2021-22204) permitea executarea de comenzi arbitrare \u00een sistem atunci c\u00e2nd se analizau metadatele din fi\u0219ierele \u00een format DjVu: (metadata \t (Copyright . qx{echo test >\\\/tmp\\\/test} . > b <)) <\/p>\n

\u00cen acest context, deoarece formatul efectiv era determinat \u00een ExifTool pe baza tipului MIME al con\u021binutului \u0219i nu al extensiei fi\u0219ierului, atacatorul putea \u00eenc\u0103rca un document DjVu cu un exploit sub forma unei imagini obi\u0219nuite JPG sau TIFF (GitLab apeleaz\u0103 ExifTool pentru toate fi\u0219ierele cu extensiile jpg, jpeg \u0219i tiff pentru a cur\u0103\u021ba etichetele necorespunz\u0103toare). Exemplu de exploit. \u00cen configura\u021bia implicit\u0103 GitLab CE, atacul poate fi efectuat prin trimiterea a dou\u0103 solicit\u0103ri care nu necesit\u0103 autentificare.

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

Utilizatorii GitLab sunt sf\u0103tui\u021bi s\u0103 se asigure c\u0103 folosesc cea mai recent\u0103 versiune \u0219i, \u00een cazul utiliz\u0103rii unei versiuni \u00eenvechite, s\u0103 instaleze de urgen\u021b\u0103 actualiz\u0103rile. Dac\u0103 din anumite motive aceasta nu este posibil, ar trebui s\u0103 aplice selectiv un patch care blocheaz\u0103 manifestarea vulnerabilit\u0103\u021bii. Utilizatorii sistemelor neactualizate sunt, de asemenea, sf\u0103tui\u021bi s\u0103 verifice dac\u0103 sistemul lor nu este compromis, analiz\u00e2nd log-urile \u0219i verific\u00e2nd existen\u021ba unor conturi suspecte de atacatori (de exemplu, dexbcx, dexbcx818, dexbcxh, dexbcxi \u0219i dexbcxa99).
\n
Sursa: opennet.ro<\/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-news"],"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\udd47Preluarea controlului asupra serverelor vulnerabile GitLab pentru implicarea \u00een desf\u0103\u0219urarea de atacuri DDoS | ProHoster","description":"Compania GitLab a avertizat utilizatorii cu privire la cre\u0219terea activit\u0103\u021bii r\u0103uf\u0103c\u0103torilor, legat\u0103 de exploatarea vulnerabilit\u0103\u021bii critice CVE-2021-22205, care permite executarea de cod de la distan\u021b\u0103 f\u0103r\u0103 autentificare.","canonical_url":"https:\/\/prohoster.info\/ro\/blog\/news\/zahvat-kontrolya-nad-uyazvimymi-serverami-gitlab-dlya-vovlecheniya-v-provedenie-ddos-atak","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"ro_RO","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 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