{"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\/et\/blog\/news\/uyazvimosti-v-skanerah-bezopasnosti-obrazov-docker-kontejnerov","title":{"rendered":"Haavatavused Docker-konteinerite turvaskannerites","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Avaldatud<\/a><\/noindex> testimise tulemused t\u00f6\u00f6riistadele, mis tuvastavad parendamata haavatavusi ja avastavad turvaprobleeme Docker'i isoleeritud konteinerite piltides. Kontroll n\u00e4itas, et 4 kuuest tuntud Docker'i pildiskannerist sisaldas kriitilisi haavatavusi, mis v\u00f5imaldavad r\u00fcnnata otse skannerit ja saavutada koodi t\u00e4itmine s\u00fcsteemis, teatud juhtudel (n\u00e4iteks Snyki kasutamisel) root \u00f5igustega. <\/p>\n

R\u00fcnnakuks piisab kurjategijal, kui ta k\u00e4ivitab kontrolli oma Dockerfile'i v\u00f5i manifest.json'i \u00fcle, mis sisaldab spetsiaalselt koostatud metaandmeid, v\u00f5i paneb sisse pildi Podfile'i ja gradlew failid. Eksploiti protot\u00fc\u00fcbid \u00f5nnestus ette valmistada<\/a><\/noindex> s\u00fcsteemide jaoks
\nWhiteSource<\/a><\/noindex>, Snyk<\/a><\/noindex>,
\nFossa<\/a><\/noindex> ja
\nAnchore<\/a><\/noindex>. Parimat turvalisust n\u00e4itas pakett Clair<\/a><\/noindex>, mis loodi esialgselt turvalisuse tagamise kaalutlustega. Probleeme ei leitud ka pakendis Trivy<\/a><\/noindex>. L\u00f5ppkokkuv\u00f5ttes j\u00f5uti j\u00e4reldusele, et Docker'i konteinerite skannereid tuleks k\u00e4ivitada isoleeritud keskkondades v\u00f5i kasutada ainult oma piltide kontrollimiseks ning ettevaatlikult tuleks l\u00e4heneda sarnaste t\u00f6\u00f6riistade \u00fchendamisele pideva integreerimise automatiseeritud s\u00fcsteemidega.<\/p>\n

FOSSAs, Snykis ja WhiteSource'is oli haavatavus seotud v\u00e4lise paketihalduri kutsumisega s\u00f5ltuvuste m\u00e4\u00e4ramiseks ja v\u00f5imaldas korraldada oma koodi t\u00e4itmist, m\u00e4\u00e4rates failidesse k\u00e4sud touch ja system gradlew<\/a><\/noindex> ja Podfile<\/a><\/noindex>.<\/p>\n

Snykis ja WhiteSource'is leiti lisaks kui s\u00fcsteemsete k\u00e4skude k\u00e4ivitamise seadistamine Dockerfile'i anal\u00fc\u00fcsimisel (n\u00e4iteks Snykis sai Dockerfile'i kaudu asendada skanneri kutse utiliidi \/bin\/ls, ja WhiteSource'is sai koodi sisestada argumentide kaudu kujul \"echo \u2018;touch \/tmp\/hacked_whitesource_pip;=1.0'\" ).<\/a><\/noindex> haavatavuse<\/a><\/noindex>, seotud<\/a><\/noindex> s\u00fcsteemsete k\u00e4skude k\u00e4ivitamise organiseerimine Dockerfile'i anal\u00fc\u00fcsimisel (n\u00e4iteks Snykis oli v\u00f5imalik asendada skanneri poolt kutsutud utiliit \/bin\/ls ja WhiteSourcel oli v\u00f5imalik koodi sisestada argumentide kaudu kujul «echo ‘;touch \/tmp\/hacked_whitesource_pip;=1.0′»). <\/p>\n

tekkinud utiliidi<\/a><\/noindex> skopeo kasutamise t\u00f5ttu Docker'i piltidega. Kasutamine h\u00f5lmas manifest.json faili lisamise parameetritega nagu \u2018\"os\": \"$(touch hacked_anchore)\"\u2018, mis asetatakse skopeo kutse korral ilma n\u00f5uetekohase eemaldamiseta (eemaldati ainult s\u00fcmbolid \u201e;&<>\u201d, kuid lubati konstruktsiooni \u201e$()\u201d).<\/a><\/noindex> docker-piltidega t\u00f6\u00f6tamiseks. Kasutamine piirdus manifest.json faili lisamisega parameetritega kujul ‘»os»: «$(touch hacked_anchore)»‘, mis sisestatakse skopeo kutsumisel ilma korraliku escaping'ita (eemaldati ainult s\u00fcmbolid «;&<>», kuid struktuur «$()» oli lubatud).<\/p>\n

Sama autor on l\u00e4bi viinud uurimuse, mis k\u00e4sitleb turvaskannerite efektiivsust parandamata haavatavuste tuvastamisel docker-konteinerites ja valepositiivsete tulemuste taset (osa 1<\/a><\/noindex>, Osa 2<\/a><\/noindex>, osa 3<\/a><\/noindex>). Allpool n\u00e4idatakse 73 pildifaili testimise tulemusi, mis sisaldavad tuntud haavatavusi, ning antakse hinnang tavaliste rakenduste tuvastamise efektiivsusele piltides (nginx, tomcat, haproxy, gunicorn, redis, ruby, node).<\/p>\n

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

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

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

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

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