{"id":101307,"date":"2021-09-17T10:22:35","date_gmt":"2021-09-17T08:22:35","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/udalyonno-ekspluatiruemaya-uyazvimost-v-omi-agente-navyazyvaemom-v-linux-okruzheniyah-microsoft-azure"},"modified":"2021-09-17T10:22:35","modified_gmt":"2021-09-17T08:22:35","slug":"udalyonno-ekspluatiruemaya-uyazvimost-v-omi-agente-navyazyvaemom-v-linux-okruzheniyah-microsoft-azure","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/udalyonno-ekspluatiruemaya-uyazvimost-v-omi-agente-navyazyvaemom-v-linux-okruzheniyah-microsoft-azure","title":{"rendered":"Eemaldatavalt exploiteeritav haavatavus OMI-agendis, mis on sunnitud Microsoft Azure'i Linux-keskkondadesse","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Microsoft Azure'i pilveplatvormi kliendid, kes kasutavad Linuxi virtuaalmasinates, on kokku puutunud kriitilise haavatavusega (CVE-2021-38647), mis v\u00f5imaldab kaugjuhtimise teel koodi k\u00e4ivitada root-\u00f5igustes. Haavatavus on saanud koodnimeks OMIGOD ning on t\u00e4helepanuv\u00e4\u00e4rne, kuna probleem esineb OMI Agent'i rakenduses, mis installitakse Linuxi keskkondades ilma suurema k\u00e4rata. <\/p>\n

OMI Agent installitakse automaatselt ja aktiveeritakse, kui kasutatakse teenuseid nagu Azure Automation, Azure Automatic Update, Azure Operations Management Suite, Azure Log Analytics, Azure Configuration Management, Azure Diagnostics ja Azure Container Insights. N\u00e4iteks on r\u00fcnnaku ohus Linuxi keskkonnad Azure'is, kus j\u00e4lgimine on aktiivne. Agent on osa avatud paketti OMI (Open Management Infrastructure Agent), mis rakendab DMTF CIM\/WBEM protokolli IT-infrastruktuuri haldamiseks. <\/p>\n

OMI Agent installitakse s\u00fcsteemis kasutajaga omsagent ja loob seadistused \/etc\/sudoers, et k\u00e4itada seeria skripte root-\u00f5igustega. Teatud teenuste t\u00f6\u00f6 k\u00e4igus luuakse v\u00f5rgusoketid v\u00f5rgupordidel 5985, 5986 ja 1270. Shodan teenuse skaneerimine n\u00e4itab, et v\u00f5rgus on enam kui 15 000 haavatavat Linuxi keskkonda. Hetkel on avatud juurdep\u00e4\u00e4suga juba paigutatud t\u00f6\u00f6tav eksploiti protot\u00fc\u00fcp, mis v\u00f5imaldab k\u00e4itada enda koodi root-\u00f5igustega sellistes s\u00fcsteemides. <\/p>\n

Probleem s\u00fcveneb asjaoluga, et Azure'is ei ole OMI kasutamine selgelt dokumenteeritud ning OMI Agent installitakse ilma hoiatusteta \u2014 piisab, kui n\u00f5ustuda valitud teenuse tingimustega, kui keskkonda seadistatakse, ja OMI Agent aktiveeritakse automaatselt, st enamikel kasutajatel ei ole isegi aimugi selle olemasolust. <\/p>\n

Kasutusmeetod on triviaalne \u2014 piisab, kui saata agendile XML-p\u00e4ring, eemaldades autentimise eest vastutava pealkirja. OMI kasutab autentimist juhtivate s\u00f5numite vastuv\u00f5tmisel, kontrollides, et kliendil on \u00f5igus teatud k\u00e4sku saata. Haavatavuse sisu seisneb selles, et s\u00f5numis, kustutades pealkirja 'Authentication', mis vastutab autentimise eest, server<\/a> peab kontrolli edukaks, v\u00f5tab juhtiva s\u00f5numi vastu ja lubab k\u00e4ske t\u00e4ita root'i \u00f5igustega. S\u00fcsteemis suvaliste k\u00e4su t\u00e4itmiseks piisab, kui kasutada s\u00f5numis tavalist k\u00e4sku ExecuteShellCommand_INPUT. N\u00e4iteks utiliidi 'id' k\u00e4ivitamiseks piisab, kui saata p\u00e4ring: curl -H 'Content-Type: application\/soap+xml;charset=UTF-8' -k --data-binary '@http_body.txt' https:\/\/10.0.0.5:5986\/wsman \u2026

id<\/p>

0<\/p> <\/p> <\/s> <\/s> <\/p>\n

Microsofti ettev\u00f5te on v\u00e4lja andnud OMI 1.6.8.1 uuenduse, et k\u00f5rvaldada haavatavus, kuid see pole veel j\u00f5udnud Microsoft Azure'i kasutajateni (uutes keskkondades on endiselt paigaldatud vana OMI versioon). Agendi automaatne uuendamine ei ole toetatud, seega peavad kasutajad paketi k\u00e4sitsi uuendama, kasutades k\u00e4sku «dpkg -l omi» Debian\/Ubuntu s\u00fcsteemides v\u00f5i «rpm -qa omi» Fedora\/RHEL s\u00fcsteemides. Kaitsestrateegiana soovitatakse blokeerida juurdep\u00e4\u00e4s v\u00f5rguportidele 5985, 5986 ja 1270. <\/p>\n

Lisaks CVE-2021-38647 on OMI 1.6.8.1 k\u00f5rvaldatud ka kolm haavatavust (CVE-2021-38648, CVE-2021-38645 ja CVE-2021-38649), mis v\u00f5imaldavad privileegideta kohalikel kasutajatel oma koodi k\u00e4ivitada root \u00f5igustes.
\n
Allikas: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u043b\u0438\u0435\u043d\u0442\u044b \u043e\u0431\u043b\u0430\u0447\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b Microsoft Azure, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0438\u0435 Linux \u0432 \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0445 \u043c\u0430\u0448\u0438\u043d\u0430\u0445, \u0441\u0442\u043e\u043b\u043a\u043d\u0443\u043b\u0438\u0441\u044c \u0441 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c\u044e (CVE-2021-38647), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u043e\u043b\u0443\u0447\u0438\u043b\u0430 \u043a\u043e\u0434\u043e\u0432\u043e\u0435 \u0438\u043c\u044f OMIGOD \u0438 \u043f\u0440\u0438\u043c\u0435\u0447\u0430\u0442\u0435\u043b\u044c\u043d\u0430 \u0442\u0435\u043c, \u0447\u0442\u043e \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u0432 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0438 OMI Agent, \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u0431\u0435\u0437 \u043b\u0438\u0448\u043d\u0435\u0439 \u043e\u0433\u043b\u0430\u0441\u043a\u0438 \u0443\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u0432 Linux-\u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f. OMI Agent \u0430\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u0443\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u0438 \u0430\u043a\u0442\u0438\u0432\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u043f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u0442\u0430\u043a\u0438\u0445 \u0441\u0435\u0440\u0432\u0438\u0441\u043e\u0432, \u043a\u0430\u043a […]<\/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-101307","post","type-post","status-publish","format-standard","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\udd47Kaugjuhtimise haavatavus OMI-agentis, mis on sunnitud Microsoft Azure Linuxi keskkondadesse | ProHoster","description":"Microsoft Azure'i pilveteenuse kliendid, kes kasutavad Linuxit virtuaalmasinates, on kokku puutunud kriitilise haavatavusega (CVE-2021-38647), mis v\u00f5imaldab kaugelt k\u00e4ivitada koodi root \u00f5igustes. Haavatavus sai koodnimeks OMIGOD ja on t\u00e4helepanuv\u00e4\u00e4rne selle poolest, et probleem esineb OMI agendi rakenduses, mis installitakse ilma liigse t\u00e4helepanuta Linuxi keskkondadesse. OMI agent installitakse ja aktiveeritakse automaatselt, kui kasutatakse teenuseid nagu","canonical_url":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/udalyonno-ekspluatiruemaya-uyazvimost-v-omi-agente-navyazyvaemom-v-linux-okruzheniyah-microsoft-azure","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"et_EE","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\u0423\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u0443\u0435\u043c\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 OMI-\u0430\u0433\u0435\u043d\u0442\u0435, \u043d\u0430\u0432\u044f\u0437\u044b\u0432\u0430\u0435\u043c\u043e\u043c \u0432 Linux-\u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f\u0445 Microsoft Azure | ProHoster","og:description":"\u041a\u043b\u0438\u0435\u043d\u0442\u044b \u043e\u0431\u043b\u0430\u0447\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b Microsoft Azure, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0438\u0435 Linux \u0432 \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0445 \u043c\u0430\u0448\u0438\u043d\u0430\u0445, \u0441\u0442\u043e\u043b\u043a\u043d\u0443\u043b\u0438\u0441\u044c \u0441 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c\u044e (CVE-2021-38647), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u043e\u043b\u0443\u0447\u0438\u043b\u0430 \u043a\u043e\u0434\u043e\u0432\u043e\u0435 \u0438\u043c\u044f OMIGOD \u0438 \u043f\u0440\u0438\u043c\u0435\u0447\u0430\u0442\u0435\u043b\u044c\u043d\u0430 \u0442\u0435\u043c, \u0447\u0442\u043e \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u0432 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0438 OMI Agent, \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u0431\u0435\u0437 \u043b\u0438\u0448\u043d\u0435\u0439 \u043e\u0433\u043b\u0430\u0441\u043a\u0438 \u0443\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u0432 Linux-\u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f. 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