{"id":93156,"date":"2020-09-03T19:42:00","date_gmt":"2020-09-03T17:42:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-skanerah-bezopasnosti-obrazov-docker-kontejnerov"},"modified":"2020-09-03T19:42:00","modified_gmt":"2020-09-03T17:42:00","slug":"uyazvimosti-v-skanerah-bezopasnosti-obrazov-docker-kontejnerov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimosti-v-skanerah-bezopasnosti-obrazov-docker-kontejnerov","title":{"rendered":"A Docker-kont\u00e9ner k\u00e9pf\u00e1jlok biztons\u00e1gi szkenner\u00e9ben l\u00e9v\u0151 s\u00e9r\u00fcl\u00e9kenys\u00e9gek","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Megjelentek<\/a><\/noindex> a tesztel\u00e9si eredm\u00e9nyek az elavult sebezhet\u0151s\u00e9gek azonos\u00edt\u00e1s\u00e1ra \u00e9s a Docker izol\u00e1lt kont\u00e9nerek k\u00e9peivel kapcsolatos biztons\u00e1gi probl\u00e9m\u00e1k felt\u00e1r\u00e1s\u00e1ra. A vizsg\u00e1lat sor\u00e1n kider\u00fclt, hogy a 6 ismert Docker k\u00e9pellen\u0151rz\u0151 k\u00f6z\u00fcl 4-ben kritikus sebezhet\u0151s\u00e9gek tal\u00e1lhat\u00f3k, amelyek lehet\u0151v\u00e9 tett\u00e9k a szkenner k\u00f6zvetlen t\u00e1mad\u00e1s\u00e1t \u00e9s a k\u00f3d v\u00e9grehajt\u00e1s\u00e1t a rendszerben, egyes esetekben (p\u00e9ld\u00e1ul Snyk haszn\u00e1latakor) root jogosults\u00e1gokkal. <\/p>\n

A t\u00e1mad\u00e1shoz a t\u00e1mad\u00f3nak elegend\u0151 az \u0151 Dockerfile-j\u00e1nak vagy manifest.json-j\u00e1nak ellen\u0151rz\u00e9se, amely speci\u00e1lisan elk\u00e9sz\u00edtett metadat\u00e1kat tartalmaz, vagy f\u00e1jlokat, p\u00e9ld\u00e1ul Podfile-t \u00e9s gradlew-t helyezni a kont\u00e9nerbe. Az exploit protot\u00edpusait siker\u00fclt elk\u00e9sz\u00edteni<\/a><\/noindex> rendszerekhez
\nWhiteSource<\/a><\/noindex>, Snyk<\/a><\/noindex>,
\nFossa<\/a><\/noindex> \u00e9s
\nAnchore<\/a><\/noindex>. A legjobb biztons\u00e1got a csomag biztos\u00edtotta Clair<\/a><\/noindex>, amelyet eredetileg a biztons\u00e1g biztos\u00edt\u00e1sa \u00e9rdek\u00e9ben \u00edrtak. Probl\u00e9m\u00e1kat nem tal\u00e1ltunk a Trivy<\/a><\/noindex>. V\u00e9g\u00fcl arra a k\u00f6vetkeztet\u00e9sre jutottunk, hogy a Docker kont\u00e9nereket szkennel\u0151 eszk\u00f6z\u00f6ket izol\u00e1lt k\u00f6rnyezetekben kell futtatni, vagy csak saj\u00e1t k\u00e9peik ellen\u0151rz\u00e9s\u00e9re haszn\u00e1lj\u00e1k, tov\u00e1bb\u00e1 \u00f3vatosan kell elj\u00e1rni az ilyen eszk\u00f6z\u00f6k automatiz\u00e1lt folyamatos integr\u00e1ci\u00f3s rendszerekhez val\u00f3 csatlakoztat\u00e1sa sor\u00e1n.<\/p>\n

A FOSSA, Snyk \u00e9s WhiteSource eset\u00e9ben a sebezhet\u0151s\u00e9g a k\u00fcls\u0151 csomagkezel\u0151 h\u00edv\u00e1s\u00e1val volt \u00f6sszef\u00fcgg\u00e9sben a f\u00fcgg\u0151s\u00e9gek azonos\u00edt\u00e1s\u00e1ra, \u00e9s lehet\u0151v\u00e9 tette a k\u00f3d v\u00e9grehajt\u00e1s\u00e1t a touch \u00e9s system parancsok megad\u00e1s\u00e1val a gradlew<\/a><\/noindex> \u00e9s Podfile<\/a><\/noindex>.<\/p>\n

A Snyk \u00e9s WhiteSource tov\u00e1bbi sebezhet\u0151s\u00e9geket t\u00e1rtak fel, amelyek a rendszerparancsok futtat\u00e1s\u00e1nak szervez\u00e9s\u00e9vel kapcsolatosak a Dockerfile elemz\u00e9se sor\u00e1n (p\u00e9ld\u00e1ul Snyk eset\u00e9ben a Dockerfile-ban ki lehetett cser\u00e9lni a szkenner \u00e1ltal h\u00edvott \/bin\/ls eszk\u00f6zt, m\u00edg a WhiteSource eset\u00e9ben k\u00f3dot lehetett adni az \u0430\u0440\u0433\u00f3mentumok form\u00e1j\u00e1ban, mint p\u00e9ld\u00e1ul \u201eecho \u2018;touch \/tmp\/hacked_whitesource_pip;=1.0\u2019\u201d). felfedeztek<\/a><\/noindex> sebezhet\u0151s\u00e9gek<\/a><\/noindex>, a kapcsol\u00f3d\u00f3<\/a><\/noindex> a rendszerparancsok ind\u00edt\u00e1s\u00e1nak szervez\u00e9s\u00e9r\u0151l a Dockerfile elemz\u00e9sekor (p\u00e9ld\u00e1ul a Snyk eset\u00e9ben a Dockerfile-ban lehetett helyettes\u00edteni a szkenner \u00e1ltal megk\u00f6vetelt \/bin\/ls parancsot, m\u00edg a WhiteSource-n\u00e1l a k\u00f3dot az argumentumok seg\u00edts\u00e9g\u00e9vel lehetett behelyettes\u00edteni a k\u00f6vetkez\u0151 form\u00e1ban: «echo ‘;touch \/tmp\/hacked_whitesource_pip;=1.0′»). <\/p>\n

Az Anchore eset\u00e9ben a sebezhet\u0151s\u00e9get a<\/a><\/noindex> skopeo haszn\u00e1lata okozta<\/a><\/noindex> a docker-k\u00e9pek kezel\u00e9s\u00e9hez. Az \u00fczemeltet\u00e9s abb\u00f3l \u00e1llt, hogy a manifest.json f\u00e1jlba olyan param\u00e9tereket adunk hozz\u00e1, mint p\u00e9ld\u00e1ul ‘»os»: «$(touch hacked_anchore)»‘, amelyeket a skopeo h\u00edv\u00e1sakor haszn\u00e1lnak, megfelel\u0151 escaping n\u00e9lk\u00fcl (csak a «;&<>» karakterek v\u00e1gt\u00e1k ki, de a «$()» strukt\u00fara enged\u00e9lyezett volt).<\/p>\n

Ugyanezen szerz\u0151 v\u00e9gezte a docker-kont\u00e9nereket vizsg\u00e1l\u00f3 biztons\u00e1gi szkennerek \u00e1ltal felt\u00e1rt elavult sebezhet\u0151s\u00e9gek hat\u00e9konys\u00e1g\u00e1nak vizsg\u00e1lat\u00e1t \u00e9s a hamis pozit\u00edv eredm\u00e9nyek ar\u00e1ny\u00e1t (1. r\u00e9sz<\/a><\/noindex>, 2. r\u00e9sz<\/a><\/noindex>, 3. r\u00e9sz<\/a><\/noindex>). Az al\u00e1bbiakban 73 k\u00e9pm\u00e1s tesztel\u00e9si eredm\u00e9nyei l\u00e1that\u00f3k, amelyek ismeretes sebezhet\u0151s\u00e9geket tartalmaznak, valamint \u00e9rt\u00e9kel\u00e9s tal\u00e1lhat\u00f3 a tipikus alkalmaz\u00e1sok (nginx, tomcat, haproxy, gunicorn, redis, ruby, node) jelenl\u00e9t\u00e9nek \u00e9szlel\u00e9s\u00e9nek hat\u00e9konys\u00e1g\u00e1r\u00f3l a k\u00e9pm\u00e1sokban.<\/p>\n

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

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

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

Forr\u00e1s: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0445 \u0441\u043b\u0443\u0447\u0430\u044f\u0445 (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 Snyk) \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root. \u0414\u043b\u044f […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":93157,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-93156","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\udd47Sebezhet\u0151s\u00e9gek a Docker-kont\u00e9ner k\u00e9pm\u00e1sainak 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