{"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\/hu\/blog\/news\/zahvat-kontrolya-nad-uyazvimymi-serverami-gitlab-dlya-vovlecheniya-v-provedenie-ddos-atak","title":{"rendered":"A GitLab sebezhet\u0151 szervereinek ellen\u0151rz\u00e9se a DDoS-t\u00e1mad\u00e1sok lebonyol\u00edt\u00e1sa c\u00e9lj\u00e1b\u00f3l.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A GitLab figyelmeztette felhaszn\u00e1l\u00f3it a rosszindulat\u00fa t\u00e1mad\u00f3k fokozott aktivit\u00e1s\u00e1ra, amely a kritikus CVE-2021-22205 sebezhet\u0151s\u00e9g kihaszn\u00e1l\u00e1s\u00e1val kapcsolatos, amely lehet\u0151v\u00e9 teszi, hogy a t\u00e1mad\u00f3 t\u00e1volr\u00f3l, hiteles\u00edt\u00e9s n\u00e9lk\u00fcl v\u00e9grehajtsa saj\u00e1t k\u00f3dj\u00e1t a GitLab platformot haszn\u00e1l\u00f3 szerveren. <\/p>\n

A probl\u00e9ma a GitLab 11.9 verzi\u00f3j\u00e1t\u00f3l jelentkezik, \u00e9s m\u00e1r \u00e1prilisban kijav\u00edtott\u00e1k a GitLab 13.10.3, 13.9.6 \u00e9s 13.8.8 kiad\u00e1sokban. Ennek ellen\u00e9re a glob\u00e1lis h\u00e1l\u00f3zat 2022. okt\u00f3ber 31-i felm\u00e9r\u00e9se szerint a 60 000 nyilv\u00e1nosan el\u00e9rhet\u0151 GitLab p\u00e9ld\u00e1ny k\u00f6z\u00fcl 50%-uk tov\u00e1bbra is elavult GitLab verzi\u00f3kat haszn\u00e1l, amelyek sebezhet\u0151s\u00e9geknek vannak kit\u00e9ve. A sz\u00fcks\u00e9ges friss\u00edt\u00e9sek csak a vizsg\u00e1lt p\u00e9ld\u00e1nyok 21%-\u00e1n v\u00e9grehajtottak. szerverek<\/a>, m\u00edg a rendszerek 29%-\u00e1n nem siker\u00fclt meghat\u00e1rozni a haszn\u00e1lt verzi\u00f3 sz\u00e1m\u00e1t. <\/p>\n

A GitLab szerverek adminisztr\u00e1torainak hanyags\u00e1ga az friss\u00edt\u00e9sek telep\u00edt\u00e9s\u00e9vel kapcsolatban odavezetett, hogy a sebezhet\u0151s\u00e9get akt\u00edvan kihaszn\u00e1lj\u00e1k a t\u00e1mad\u00f3k, akik szervereken<\/a> rosszindulat\u00fa programokat helyeznek el \u00e9s csatlakoztatj\u00e1k \u0151ket egy botnethez, amely r\u00e9szt vesz a DDoS-t\u00e1mad\u00e1sok v\u00e9grehajt\u00e1s\u00e1ban. A GitLab sebezhet\u0151 szerverekre alapozott botnet \u00e1ltal gener\u00e1lt DDoS-t\u00e1mad\u00e1s cs\u00facsforgalma el\u00e9rte az 1 terabitet m\u00e1sodpercenk\u00e9nt. <\/p>\n

A sebezhet\u0151s\u00e9g a k\u00fcls\u0151 ExifTool k\u00f6nyvt\u00e1ron alapul\u00f3 k\u00e9pf\u00e1jlok helytelen feldolgoz\u00e1s\u00e1b\u00f3l ered. Az ExifToolban tal\u00e1lhat\u00f3 sebezhet\u0151s\u00e9g (CVE-2021-22204) lehet\u0151v\u00e9 tette tetsz\u0151leges parancsok v\u00e9grehajt\u00e1s\u00e1t a rendszerben a DjVu form\u00e1tum\u00fa f\u00e1jlok metaadatai alapj\u00e1n v\u00e9gzett elemz\u00e9s sor\u00e1n: (metadata \t (Copyright . qx{echo test >\\\/tmp\\\/test} . b <) ) <\/p>\n

Mivel a t\u00e9nyleges form\u00e1tumot az ExifTool a tartalom MIME-t\u00edpus\u00e1nak megfelel\u0151en hat\u00e1rozta meg, nem pedig a f\u00e1jl kiterjeszt\u00e9se alapj\u00e1n, a t\u00e1mad\u00f3 DjVu dokumentumot t\u00f6lthetett fel, amely kihaszn\u00e1lja a sebezhet\u0151s\u00e9get, mik\u00f6zben norm\u00e1l JPG- vagy TIFF-k\u00e9pk\u00e9nt adja ki mag\u00e1t (a GitLab minden jpg, jpeg \u00e9s tiff kiterjeszt\u00e9s\u0171 f\u00e1jl eset\u00e9n az ExifTool-t h\u00edvja meg a felesleges tagek t\u00f6rl\u00e9s\u00e9re). P\u00e9lda a kihaszn\u00e1l\u00e1sra. A GitLab CE alap\u00e9rtelmezett konfigur\u00e1ci\u00f3j\u00e1ban a t\u00e1mad\u00e1s k\u00e9t, hiteles\u00edt\u00e9st nem ig\u00e9nyl\u0151 k\u00e9rd\u00e9s elk\u00fcld\u00e9s\u00e9vel v\u00e9grehajthat\u00f3.

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

A GitLab felhaszn\u00e1l\u00f3knak aj\u00e1nlott ellen\u0151rizni a legfrissebb verzi\u00f3 haszn\u00e1lat\u00e1t, \u00e9s ha elavult kiad\u00e1st haszn\u00e1lnak, s\u00fcrg\u0151sen telep\u00edteni\u00fck kell a friss\u00edt\u00e9seket, vagy ha ez valamilyen okb\u00f3l nem lehets\u00e9ges, szelekt\u00edven alkalmazni egy jav\u00edt\u00e1st, amely blokkolja a sebezhet\u0151s\u00e9g megjelen\u00e9s\u00e9t. Azok sz\u00e1m\u00e1ra, akik nem friss\u00edtett rendszereket haszn\u00e1lnak, szint\u00e9n aj\u00e1nlott megbizonyosodniuk arr\u00f3l, hogy a rendszer\u00fck nem lett kompromitt\u00e1lva, elemzik a napl\u00f3kat \u00e9s ellen\u0151rizni\u00fck kell a gyan\u00fas t\u00e1mad\u00f3i fi\u00f3kokat (p\u00e9ld\u00e1ul dexbcx, dexbcx818, dexbcxh, dexbcxi \u00e9s dexbcxa99).
\n
Forr\u00e1s: 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-news"],"aioseo_notices":[],"aioseo_head":"\n\t\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\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47A GitLab sebezhet\u0151 szervereinek ellen\u0151rz\u00e9se DDoS t\u00e1mad\u00e1sok lebonyol\u00edt\u00e1s\u00e1ra | ProHoster","description":"A GitLab figyelmeztette a felhaszn\u00e1l\u00f3kat a kiberb\u0171n\u00f6z\u0151k fokozott 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