{"id":27798,"date":"2019-05-22T09:00:58","date_gmt":"2019-05-22T00:00:58","guid":{"rendered":"https:\/\/www.creationline.com\/?p=27798"},"modified":"2019-10-29T16:24:34","modified_gmt":"2019-10-29T07:24:34","slug":"cve-2019-5021%ef%bc%9aalpine-docker%e3%82%a4%e3%83%a1%e3%83%bc%e3%82%b8%e7%a9%ba%e3%83%91%e3%82%b9%e3%83%af%e3%83%bc%e3%83%89%e8%84%86%e5%bc%b1%e6%80%a7-aquasecurity-container-security-devsecops","status":"publish","type":"post","link":"https:\/\/www.creationline.com\/tech-blog\/cloudnative\/aquasecurity\/27798","title":{"rendered":"CVE-2019-5021\uff1aAlpine Docker\u30a4\u30e1\u30fc\u30b8\u7a7a\u30d1\u30b9\u30ef\u30fc\u30c9\u8106\u5f31\u6027 #AquaSecurity #Container #Security #DevSecOps"},"content":{"rendered":"<p><img decoding=\"async\" src=\"\/tech-blog\/cms_x3GWkuX\/wp-content\/uploads\/2018\/11\/aqua_logo_fullcolor-01-360x129.jpg\" alt=\"\" \/><br \/>\n\u672c\u30d6\u30ed\u30b0\u306f\u300c<a href=\"https:\/\/www.aquasec.com\/\">Aqua Security<\/a>\u300d\u793e\u306e\u6280\u8853\u30d6\u30ed\u30b0\u30672019\u5e745\u670812\u65e5\u306b\u516c\u958b\u3055\u308c\u305f\u300c<a href=\"https:\/\/blog.aquasec.com\/cve-2019-5021-alpine-docker-image-vulnerability\">cve-2019-5021-alpine-docker-image-vulnerability<\/a>\u300d\u306e\u65e5\u672c\u8a9e\u7ffb\u8a33\u3067\u3059\u3002<\/p>\n<h2>CVE-2019-5021\uff1aAlpine Docker\u30a4\u30e1\u30fc\u30b8\u7a7a\u30d1\u30b9\u30ef\u30fc\u30c9\u8106\u5f31\u6027<\/h2>\n<p>\u5148\u9031\u3001Alpine\u306eDocker\u30a4\u30e1\u30fc\u30b8\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u65b0\u3057\u3044\u8106\u5f31\u6027\u304c\u516c\u958b\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u306e\u8106\u5f31\u6027\u306f\u3001\u30d0\u30fc\u30b8\u30e7\u30f33.3\u4ee5\u964d\u306eAlpine Docker\u30a4\u30e1\u30fc\u30b8\u3067\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u7a7a\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308broot\u30e6\u30fc\u30b6\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u304c\u539f\u56e0\u3067\u3059\u3002<\/p>\n<p>\u3053\u306eCVE\u306fDocker\u30a4\u30e1\u30fc\u30b8\u3068\u3057\u3066\u63d0\u4f9b\u3055\u308c\u3066\u3044\u306a\u3044Alpine\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3\u306b\u306f\u5f71\u97ff\u3057\u307e\u305b\u3093\u3002<\/p>\n<p>\u8106\u5f31\u306aAlpine\u30a4\u30e1\u30fc\u30b8\u3092\u4f7f\u7528\u3057\u305f\u30b3\u30f3\u30c6\u30ca\u74b0\u5883\u3067\u3001Linux PAM\u307e\u305f\u306f\u30b7\u30b9\u30c6\u30e0\u306eshadow\u30d5\u30a1\u30a4\u30eb\u3092\u8a8d\u8a3c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u3057\u3066\u4f7f\u7528\u3059\u308b\u305d\u306e\u4ed6\u306e\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u4f7f\u7528\u3059\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u6301\u3064\u30b3\u30f3\u30c6\u30ca\u306f\u3001root\u30e6\u30fc\u30b6\u306b\u5bfe\u3057\u3066\u7a7a\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u53d7\u3051\u5165\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001root\u30e6\u30fc\u30b6\u3067\u306f\u306a\u3044\u30e6\u30fc\u30b6\u304c\u8a8d\u8a3c\u30d7\u30ed\u30bb\u30b9\u3092\u8fc2\u56de\u3057\u3066\u30b3\u30f3\u30c6\u30ca\u5185\u306broot\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u3044\u3046\u30b7\u30ca\u30ea\u30aa\u304c\u751f\u3058\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>\u4f7f\u7528\u3057\u3066\u3044\u308bAlpine\u30a4\u30e1\u30fc\u30b8\u306b\u8106\u5f31\u306f\u3042\u308b\u304b<\/h2>\n<p>\u4f7f\u7528\u3057\u3066\u3044\u308bDocker\u30a4\u30e1\u30fc\u30b8\u304c\u8106\u5f31\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u306b\u306f\u3001\u5b9f\u884c\u4e2d\u306e\u300cAlpine\u300d\u30b3\u30f3\u30c6\u30ca\u306b\u30ed\u30b0\u30a4\u30f3\u3057\u3001\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<p><code><br \/>\n$ cat \/etc\/shadow | grep root<br \/>\n<\/code><br \/>\n\u8106\u5f31\u306a\u30b3\u30f3\u30c6\u30ca\u306e\u51fa\u529b\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<br \/>\n<code><br \/>\nroot:::0:::::<br \/>\n<\/code><br \/>\n\/etc\/shadow\u30d5\u30a1\u30a4\u30eb\u306f\u5404\u30e6\u30fc\u30b6\u306e\u6697\u53f7\u5316\u3055\u308c\u305f\u30d1\u30b9\u30ef\u30fc\u30c9\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u4e00\u884c\u306b\u3064\u304d\u3001\u4e00\u30e6\u30fc\u30b6\u306e\u6697\u53f7\u5316\u3055\u308c\u305f\u30d1\u30b9\u30ef\u30fc\u30c9\u3001\u5909\u66f4\u6642\u523b\u3001\u6709\u52b9\u671f\u9650\u306a\u3069\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u306b\u95a2\u3059\u308b\u60c5\u5831\u304c\u8a18\u8f09\u3055\u308c\u3066\u3044\u307e\u3059\u3002(\u5404\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u30b3\u30ed\u30f3\u3067\u533a\u5207\u3089\u308c\u3066\u3044\u307e\u3059\u3002)<\/p>\n<p>\u4e0a\u8a18\u306e\u51fa\u529b\u306e\u3088\u3046\u306b\u8106\u5f31\u306aAlpine\u30a4\u30e1\u30fc\u30b8\u306eroot\u30a2\u30ab\u30a6\u30f3\u30c8\u306e2\u756a\u76ee\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u7a7a\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u304c\u7a7a\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u8106\u5f31\u6027\u3092\u4fee\u6b63\u3059\u308b\u306b\u306f\u3001root\u30d1\u30b9\u30ef\u30fc\u30c9\u304c\u300c\uff01\u300d\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u65b0\u3057\u3044Alpine\u30a4\u30e1\u30fc\u30b8\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u308c\u306f\u3001root\u30e6\u30fc\u30b6\u3092\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3078\u306e\u30ed\u30b0\u30a4\u30f3\u3068\u3057\u3066\u4f7f\u7528\u3067\u304d\u305a\u3001\u304b\u3064\u30b7\u30b9\u30c6\u30e0\u306b\u30ed\u30b0\u30a4\u30f3\u3067\u304d\u306a\u3044\u3053\u3068\u3092\u793a\u3057\u307e\u3059\u3002\uff08root\u6a29\u9650\u3067\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u3059\u3002\uff09<\/p>\n<p>\u4fee\u6b63\u3055\u308c\u305fAlpine\u30a4\u30e1\u30fc\u30b8\u306e\u51fa\u529b\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<br \/>\n<code><br \/>\nroot:!::0:::::<br \/>\n<\/code><\/p>\n<h2>Alpine\u30a4\u30e1\u30fc\u30b8\u3092\u6700\u65b0\u7248\u306b\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8<\/h2>\n<p>\u307e\u305a\u3001Alpine\u30a4\u30e1\u30fc\u30b8\u3092\u6700\u65b0\u7248\u306b\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u554f\u984c\u306f\u3001\u4ee5\u4e0b\u306eDocker\u30a4\u30e1\u30fc\u30b8<a href=\"https:\/\/github.com\/docker-library\/official-images\/pull\/5516\">\u30ea\u30ea\u30fc\u30b9<\/a>\uff082019\u5e743\u67087\u65e5\uff09\u3067\u4fee\u6b63\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<ul>\n<li>edge\uff0820190228\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\uff09<\/li>\n<li>9.2<\/li>\n<li>8.4<\/li>\n<li>7.3<\/li>\n<li>6.5<\/li>\n<\/ul>\n<p>\u30d0\u30fc\u30b8\u30e7\u30f33\u30014\u3001\u304a\u3088\u30735\u306f\u30b5\u30dd\u30fc\u30c8\u304c\u7d42\u4e86\u3057\u3066\u304a\u308a\u3001\u8106\u5f31\u6027\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002(\u4fee\u6b63\u7248\u306f\u51fa\u3066\u3044\u307e\u305b\u3093\u3002)<\/p>\n<h2>Aqua\u3092\u4f7f\u7528\u3057\u3066\u3053\u306e\u8106\u5f31\u6027\u3092\u691c\u51fa\u3057\u8efd\u6e1b\u3059\u308b<\/h2>\n<p>Docker\u30a4\u30e1\u30fc\u30b8\u304c\u7a7a\u306eroot\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u6301\u3063\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b\u306fAqua\u306e\u300cImageAssurance\u300d\u30dd\u30ea\u30b7\u30fc\u3092\u3054\u5229\u7528\u304f\u3060\u3055\u3044\u3002<\/p>\n<ol>\n<li>\u300cCVE-2019-5021\u300d\u306e\u8106\u5f31\u6027\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u4f5c\u6210\u3002<\/li>\n<\/ol>\n<pre>\n#!\/bin\/sh\n\nif [ $(cat \/etc\/shadow | grep ^root::) ]; then \n         echo \"Image is vulnerable with CVE-2019-5021\"; exit 1;\n    else echo \"Image is not vulnerable\"; exit 0;\nfi\n<\/pre>\n<p>2.\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9<br \/>\n<img decoding=\"async\" src=\"http:\/\/blog.aquasec.com\/hs-fs\/hubfs\/CVE2019-5021\/1-CustomScriptlibrary.jpg?width=800&name=1-CustomScriptlibrary.jpg\" alt=\"null\" \/><\/p>\n<p>3.\u7a7a\u306eroot\u30a2\u30ab\u30a6\u30f3\u30c8\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u542b\u3080Docker\u30a4\u30e1\u30fc\u30b8\u3092\u78ba\u8a8d\u3059\u308b\u300cImageAssurance\u300d\u30dd\u30ea\u30b7\u30fc\u3092\u4f5c\u6210\u3002<br \/>\n<img decoding=\"async\" src=\"http:\/\/blog.aquasec.com\/hs-fs\/hubfs\/CVE2019-5021\/2-ImageAssurancePolicy.jpg?width=1000&name=2-ImageAssurancePolicy.jpg\" alt=\"\" \/><\/p>\n<p>4.Docker\u30a4\u30e1\u30fc\u30b8\u3092\u30b9\u30ad\u30e3\u30f3\u3057\u3001\/etc\/shadow\u306eroot\u30e6\u30fc\u30b6\u304c\u7a7a\u3067\u3042\u308bDocker\u30a4\u30e1\u30fc\u30b8\u306f\u3001\u5148\u307b\u3069Aqua\u306b\u767b\u9332\u3057\u305f\u30dd\u30ea\u30b7\u30fc\u306b\u3088\u308a\u691c\u77e5\u3002\uff08\u5199\u771f\u306f\u3001\u4fee\u6b63\u3055\u308c\u308b\u524d\u306eAlpine:3.9\u306eDocker\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002\uff09<br \/>\n<img decoding=\"async\" src=\"http:\/\/blog.aquasec.com\/hs-fs\/hubfs\/Blog\/CVE2019-5021\/3-imagevulnerable-1.jpg?width=1000&name=3-imagevulnerable-1.jpg\" alt=\"\" \/><\/p>\n<p>shadow\u307e\u305f\u306flinux-pam\u306e\u30d1\u30c3\u30b1\u30fc\u30b8\u304c\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3082\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30d1\u30c3\u30b1\u30fc\u30b8\u306f\u3053\u306e\u8106\u5f31\u6027\u3092\u60aa\u7528\u3059\u308b\u305f\u3081\u306b\u5229\u7528\u3055\u308c\u307e\u3059\u3002\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u78ba\u8a8d\u3059\u308b\u306b\u306f\u3001\u300cPackage Blacklist\u300d\u3092\u300cImage Assurance\u300d\u30dd\u30ea\u30b7\u30fc\u306b\u8ffd\u52a0\u3057\u307e\u3059\u3002<br \/>\n<img decoding=\"async\" src=\"http:\/\/blog.aquasec.com\/hs-fs\/hubfs\/Blog\/CVE2019-5021\/4-package-blacklist.jpg?width=1000&name=4-package-blacklist.jpg\" alt=\"\" \/><\/p>\n\n\t\t<!--HubSpot Call-to-Action Code -->\n\t\t<span class=\"hs-cta-wrapper\" id=\"hs-cta-wrapper-3a13195e-48f8-474a-ac0e-d21ac0a01291\">\n\t\t<span class=\"hs-cta-node hs-cta-3a13195e-48f8-474a-ac0e-d21ac0a01291\" id=\"3a13195e-48f8-474a-ac0e-d21ac0a01291\">\n\t\t<!--[if lte IE 8]>\n\t\t<div id=\"hs-cta-ie-element\"><\/div>\n\t\t<![endif]-->\n\t\t<a href=\"https:\/\/cta-redirect.hubspot.com\/cta\/redirect\/6168413\/3a13195e-48f8-474a-ac0e-d21ac0a01291\" >\n\t\t<img decoding=\"async\" class=\"hs-cta-img\" id=\"hs-cta-img-3a13195e-48f8-474a-ac0e-d21ac0a01291\" style=\"border-width:0px;\" src=\"https:\/\/no-cache.hubspot.com\/cta\/default\/6168413\/3a13195e-48f8-474a-ac0e-d21ac0a01291.png\"  alt=\"New call-to-action\"\/>\n\t\t<\/a>\n\t\t<\/span>\n\t\t<script charset=\"utf-8\" src=\"\/\/js.hubspot.com\/cta\/current.js\"><\/script>\n\t\t<script>\n\t\thbspt.cta.load(6168413, '3a13195e-48f8-474a-ac0e-d21ac0a01291', {});\n\t\t<\/script>\n\t\t<\/span>\n\t\t<!-- end HubSpot Call-to-Action Code -->\n\t\t\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u30d6\u30ed\u30b0\u306f\u300cAqua Security\u300d\u793e\u306e\u6280\u8853\u30d6\u30ed\u30b0\u30672019\u5e745\u670812\u65e5\u306b\u516c\u958b\u3055\u308c\u305f\u300ccve-2019-5021-alpine-docker-image-vulnerability\u300d\u306e\u65e5\u672c\u8a9e\u7ffb\u8a33\u3067\u3059\u3002 CVE-201 [&#8230;]<\/p>\n","protected":false},"author":56,"featured_media":27842,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[176],"tags":[152,154,221,175],"class_list":["post-27798","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aquasecurity","tag-aquasecurity","tag-container","tag-devsecops","tag-security"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>CVE-2019-5021\uff1aAlpine Docker\u30a4\u30e1\u30fc\u30b8\u7a7a\u30d1\u30b9\u30ef\u30fc\u30c9\u8106\u5f31\u6027 #AquaSecurity #Container #Security #DevSecOps - Tech Blog\uff5c\u30af\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u30e9\u30a4\u30f3<\/title>\n<meta name=\"description\" content=\"AquaSecurity |\u672c\u30d6\u30ed\u30b0\u306f\u300cAqua\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.creationline.com\/tech-blog\/cloudnative\/aquasecurity\/27798\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CVE-2019-5021\uff1aAlpine Docker\u30a4\u30e1\u30fc\u30b8\u7a7a\u30d1\u30b9\u30ef\u30fc\u30c9\u8106\u5f31\u6027 #AquaSecurity #Container #Security #DevSecOps - Tech Blog\uff5c\u30af\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u30e9\u30a4\u30f3\" \/>\n<meta property=\"og:description\" content=\"AquaSecurity |\u672c\u30d6\u30ed\u30b0\u306f\u300cAqua\" \/>\n<meta property=\"og:url\" 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