{"id":118523,"date":"2021-04-14T06:00:49","date_gmt":"2021-04-14T13:00:49","guid":{"rendered":"https:\/\/unit42.paloaltonetworks.com\/?p=118523"},"modified":"2021-04-13T22:05:52","modified_gmt":"2021-04-14T05:05:52","slug":"cve-2021-20291","status":"publish","type":"post","link":"https:\/\/unit42.paloaltonetworks.com\/ja\/cve-2021-20291\/","title":{"rendered":"\u30b3\u30f3\u30c6\u30ca\u30a8\u30f3\u30b8\u30f3CRI-O\u3068Podman\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u65b0\u3057\u3044\u8106\u5f31\u6027(CVE-2021-20291)"},"content":{"rendered":"<h2>\u6982\u8981<\/h2>\n<p>\u30af\u30e9\u30a6\u30c9\u30cd\u30a4\u30c6\u30a3\u30d6\u74b0\u5883\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5411\u4e0a\u30a4\u30cb\u30b7\u30a2\u30c1\u30d6\u306e\u4e00\u74b0\u3068\u3057\u3066\u3001\u7b46\u8005\u306fKubernetes\u304c\u30d9\u30fc\u30b9\u3068\u3057\u3066\u3044\u308b\u8907\u6570\u306eGo\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u76e3\u67fb\u3092\u5b9f\u65bd\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u7814\u7a76\u306b\u304a\u3044\u3066<a href=\"https:\/\/github.com\/containers\/storage\">containers\/storage<\/a>\u306b<a href=\"https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2021-20291\">CVE-2021-20291<\/a>\u304c\u898b\u3064\u304b\u308a\u307e\u3057\u305f\u3002\u672c\u8106\u5f31\u6027\u306b\u3088\u308a\u3001\u30ec\u30b8\u30b9\u30c8\u30ea\u304b\u3089\u60aa\u610f\u306e\u3042\u308b\u30a4\u30e1\u30fc\u30b8\u3092\u30d7\u30eb\u3057\u305f\u5834\u5408\u306b<a href=\"https:\/\/github.com\/cri-o\/cri-o\">CRI-O<\/a>\u3068<a href=\"https:\/\/github.com\/containers\/podman\">Podman<\/a>\u306b\u30b3\u30f3\u30c6\u30ca\u30a8\u30f3\u30b8\u30f3\u306e\u30b5\u30fc\u30d3\u30b9\u62d2\u5426(DoS)\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u3053\u306e\u8106\u5f31\u6027\u306b\u3088\u308a\u3001Kubernetes\u3084OpenShift\u306a\u3069\u306e\u3053\u308c\u3089\u8106\u5f31\u306a\u30b3\u30f3\u30c6\u30ca\u30a8\u30f3\u30b8\u30f3\u306b\u4f9d\u5b58\u3059\u308b\u30b3\u30f3\u30c6\u30ca\u5316\u3055\u308c\u305f\u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u3092\u3001\u60aa\u610f\u306e\u3042\u308b\u30a2\u30af\u30bf\u30fc\u304c\u5371\u967a\u306b\u3055\u3089\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e<a href=\"https:\/\/www.paloaltonetworks.jp\/prisma\/cloud\">Prisma Cloud<\/a>\u3092\u5b9f\u884c\u3057\u3066\u304a\u3089\u308c\u308b\u304a\u5ba2\u69d8\u306f\u3001Prisma Cloud Compute\u306e\u30db\u30b9\u30c8\u8106\u5f31\u6027\u30b9\u30ad\u30e3\u30ca\u3068<a href=\"https:\/\/blog.paloaltonetworks.com\/2020\/05\/cloud-container-image-trust-groups\/\">Trusted Images<\/a>\u306e\u6a5f\u80fd\u306b\u3088\u308a\u3053\u306e\u8106\u5f31\u6027\u304b\u3089\u4fdd\u8b77\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>\u516c\u958b\u30d7\u30ed\u30bb\u30b9<\/h2>\n<p>\u79c1\u305f\u3061\u306f2021\u5e743\u670810\u65e5\u306b\u8cac\u4efb\u3092\u6301\u3063\u3066\u8106\u5f31\u6027\u3092\u516c\u958b\u3057\u3001\u30d0\u30fc\u30b8\u30e7\u30f3<a href=\"https:\/\/github.com\/containers\/storage\/releases\/tag\/v1.28.1\">1.28.1<\/a>\u3067\u4fee\u6b63\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u307e\u3057\u305f\u3002\u5bfe\u5fdc\u3059\u308b\u4fee\u6b63\u306f\u3001CRI-O\u3067\u306f\u30d0\u30fc\u30b8\u30e7\u30f3<a href=\"https:\/\/github.com\/cri-o\/cri-o\/releases\/tag\/v1.20.2\">v1.20.2<\/a>\u3067\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u307e\u3057\u305f\u3002\u307e\u305f\u3001Podman\u3067\u306f\u3001\u30d0\u30fc\u30b8\u30e7\u30f3<a href=\"https:\/\/github.com\/containers\/podman\/releases\/tag\/v3.1.0\">3.1.0<\/a>\u3067\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<p>\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306e\u30e6\u30fc\u30b6\u30fc\u8a2d\u5b9a\u306b\u3088\u3063\u3066\u306f\u3001\u66f4\u65b0\u304c\u81ea\u52d5\u7684\u306b\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3055\u308c\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u304c\u624b\u52d5\u3067\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u304c\u5fc5\u8981\u306a\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002\u30af\u30e9\u30a6\u30c9\u30cd\u30a4\u30c6\u30a3\u30d6\u74b0\u5883\u3092\u304a\u4f7f\u3044\u306e\u7686\u3055\u3093\u306b\u3001\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u78ba\u8a8d\u3057\u3001\u6700\u65b0\u3067\u306a\u3044\u5834\u5408\u306f\u66f4\u65b0\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u554f\u984c\u3078\u8fc5\u901f\u306b\u3054\u5bfe\u5fdc\u3044\u305f\u3060\u304d\u3001\u8106\u5f31\u6027\u306bCVE-2021-20291\u3092\u5272\u308a\u5f53\u3066\u3066\u304f\u3060\u3055\u3063\u305fRed Hat\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30c1\u30fc\u30e0\u306b\u611f\u8b1d\u3044\u305f\u3057\u307e\u3059\u3002<\/p>\n<h2>\u30b3\u30f3\u30c6\u30ca\u306e\u30a4\u30e1\u30fc\u30b8\u306f\u3069\u306e\u3088\u3046\u306b\u30d7\u30eb\u3055\u308c\u308b\u304b<\/h2>\n<p>\u3053\u306e\u8106\u5f31\u6027\u304c\u3069\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3059\u308b\u304b\u3092\u7406\u89e3\u3059\u308b\u306b\u306f\u3001\u30b3\u30f3\u30c6\u30ca\u30a8\u30f3\u30b8\u30f3\u304c\u30ec\u30b8\u30b9\u30c8\u30ea\u304b\u3089\u30a4\u30e1\u30fc\u30b8\u3092\u30d7\u30eb\u3057\u305f\u3068\u304d\u306b\u4f55\u304c\u8d77\u3053\u308b\u304b\u3092\u7406\u89e3\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u30b3\u30f3\u30c6\u30ca\u30a4\u30e1\u30fc\u30b8\u3092\u30d7\u30eb\u3059\u308b\u6700\u521d\u306e\u30b9\u30c6\u30c3\u30d7\u306f\u3001\u5bfe\u5fdc\u3059\u308b\u30de\u30cb\u30d5\u30a7\u30b9\u30c8\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u5404\u30a4\u30e1\u30fc\u30b8\u306b\u306f\u30de\u30cb\u30d5\u30a7\u30b9\u30c8\u3068\u3044\u3046\u30d5\u30a1\u30a4\u30eb\u304c\u3042\u308a\u3001\u3053\u306e\u306a\u304b\u306b\u30a4\u30e1\u30fc\u30b8\u306e\u4f5c\u6210\u65b9\u6cd5\u306b\u3064\u3044\u3066\u306e\u6307\u793a\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u306f\u3001\u30a4\u30e1\u30fc\u30b8\u306e\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u3084CPU\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306a\u3069\u306e\u60c5\u5831\u304c\u542b\u307e\u308c\u307e\u3059\u3002\u672c\u7a3f\u3067\u306flayers\u914d\u5217\u306b\u7126\u70b9\u3092\u5f53\u3066\u307e\u3059\u3002layers\u914d\u5217\u3068\u3044\u3046\u306e\u306f\u30de\u30cb\u30d5\u30a7\u30b9\u30c8\u306b\u542b\u307e\u308c\u308b\u30ea\u30b9\u30c8\u306e\u3053\u3068\u3067\u3001\u3053\u306e\u30ea\u30b9\u30c8\u306f\u30b3\u30f3\u30c6\u30ca\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u6210\u3059\u308b\u30ec\u30a4\u30e4\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u30a4\u30e1\u30fc\u30b8\u3092\u30d7\u30eb\u3059\u308b\u3055\u3044\u306e\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u306e1\u3064\u304c\u3001\u30b3\u30f3\u30c6\u30ca\u30a8\u30f3\u30b8\u30f3\u3067\u3053\u306e\u30ea\u30b9\u30c8\u3092\u8aad\u307f\u53d6\u3063\u3066\u3001\u5404\u30ec\u30a4\u30e4\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3001\u5727\u7e2e\u306e\u5c55\u958b\u3001<a href=\"https:\/\/linux.die.net\/man\/1\/tar\">untar<\/a>\u3092\u884c\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n<figure id=\"attachment_118518\" aria-describedby=\"caption-attachment-118518\" style=\"width: 2084px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2021\/04\/word-image-81-jp.png\" rel=\"wpdevart_lightbox\"><img  class=\"size-full wp-image-118518 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2021\/04\/word-image-81-jp.png\" alt=\"\u30b3\u30f3\u30c6\u30ca\u30a4\u30e1\u30fc\u30b8\u3092\u30d7\u30eb\u3059\u308b\u3068\u304d\u3001\u7d50\u679c\u3068\u3057\u3066\u751f\u3058\u308b\u64cd\u4f5c\u306e1\u3064\u306f\u3001\u3053\u306e\u30d5\u30ed\u30fc\u30c1\u30e3\u30fc\u30c8\u306b\u793a\u3059\u3088\u3046\u306b\u3001\u30b3\u30f3\u30c6\u30ca\u30a8\u30f3\u30b8\u30f3\u304c\u30ec\u30a4\u30e4\u914d\u5217\u3092\u8aad\u307f\u53d6\u308a\u3001\u5404\u30ec\u30a4\u30e4\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3001\u5c55\u958b\u3001untar\u3059\u308b\u3053\u3068\u3067\u3059\u3002\" width=\"2084\" height=\"108\" \/><\/a><figcaption id=\"caption-attachment-118518\" class=\"wp-caption-text\">\u56f31 \u30ec\u30a4\u30e4\u53d6\u5f97\u30d5\u30ed\u30fc<\/figcaption><\/figure>\n<p>\u653b\u6483\u8005\u306f\u3001\u8106\u5f31\u6027\u306e\u60aa\u7528\u3092\u76ee\u7684\u3068\u3057\u305f\u60aa\u610f\u306e\u3042\u308b\u30ec\u30a4\u30e4\u3092\u30ec\u30b8\u30b9\u30c8\u30ea\u306b\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3057\u305f\u5f8c\u3001\u30ec\u30a4\u30e4\u3092\u591a\u6570\u4f7f\u7528\u3059\u308b\u30a4\u30e1\u30fc\u30b8\u306b\u3053\u306e\u60aa\u610f\u306e\u3042\u308b\u30ec\u30a4\u30e4\u3092\u542b\u3081\u3066\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u60aa\u610f\u306e\u3042\u308b\u30a4\u30e1\u30fc\u30b8\u3092\u4f5c\u6210\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u5f8c\u88ab\u5bb3\u8005\u304c\u30ec\u30b8\u30b9\u30c8\u30ea\u304b\u3089\u30a4\u30e1\u30fc\u30b8\u3092\u30d7\u30eb\u3059\u308b\u3068\u3001\u305d\u306e\u30d7\u30ed\u30bb\u30b9\u5185\u306b\u60aa\u610f\u306e\u3042\u308b\u30ec\u30a4\u30e4\u304c\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3055\u308c\u3001\u8106\u5f31\u6027\u304c\u60aa\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>\u8106\u5f31\u6027: CVE-2021-20291<\/h2>\n<h4 style=\"text-align: center;\">\u5b9f\u884c\u30d5\u30ed\u30fc<\/h4>\n<figure id=\"attachment_118520\" aria-describedby=\"caption-attachment-118520\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2021\/04\/word-image-82-jp.png\" rel=\"wpdevart_lightbox\"><img  class=\"wp-image-118520 lozad\"  data-src=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2021\/04\/word-image-82-jp.png\" alt=\"CVE-2021-20291\u306e\u8106\u5f31\u6027\u5b9f\u884c\u30d5\u30ed\u30fc: 1) Go\u30eb\u30fc\u30c1\u30f31\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u30ec\u30a4\u30e4\u30012) \u30ed\u30c3\u30af\u3092\u53d6\u5f97\u30013) Go\u30eb\u30fc\u30c1\u30f32\u304a\u3088\u3073Exec(xz -d)\u3078\u306e\u79fb\u52d5\u30014) Go\u30eb\u30fc\u30c1\u30f33\u306eWait(xz) \u3001\u30d6\u30ed\u30c3\u30af\u3001chdone\u3092\u30af\u30ed\u30fc\u30ba\u30015) Untar\u3001untar\u5931\u6557\u30016) \u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u30af\u30ed\u30fc\u30ba\uff08chdone\u3092\u5f85\u6a5f\uff09\u3001\u30d6\u30ed\u30c3\u30af\" width=\"900\" height=\"824\" \/><\/a><figcaption id=\"caption-attachment-118520\" class=\"wp-caption-text\">\u56f32 \u8106\u5f31\u6027\u306e\u5b9f\u884c\u30d5\u30ed\u30fc<\/figcaption><\/figure>\n<p>\u56f32\u306f\u3001\u30b3\u30f3\u30c6\u30ca\u30a8\u30f3\u30b8\u30f3\u304c\u60aa\u610f\u306e\u3042\u308b\u30a4\u30e1\u30fc\u30b8\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3092\u30ea\u30af\u30a8\u30b9\u30c8\u3055\u308c\u305f\u5834\u5408\u306b\u3001\u60aa\u610f\u306e\u3042\u308b\u30ec\u30a4\u30e4\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u958b\u59cb\u5f8c\u306b\u304a\u304d\u308b\u8106\u5f31\u6027\u306e\u4ed5\u7d44\u307f\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u6700\u7d42\u7d50\u679c\u306f<a href=\"https:\/\/en.wikipedia.org\/wiki\/Deadlock\">\u30c7\u30c3\u30c9\u30ed\u30c3\u30af<\/a>\u306e\u767a\u751f\u3001\u3064\u307e\u308a\u30ed\u30c3\u30af\u304c\u53d6\u5f97\u3055\u308c\u305f\u307e\u307e\u6c38\u4e45\u306b\u89e3\u653e\u3055\u308c\u306a\u3044\u72b6\u6cc1\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u4ed6\u306e\u30b9\u30ec\u30c3\u30c9\u3068\u30d7\u30ed\u30bb\u30b9\u304c\u5b9f\u884c\u3092\u505c\u6b62\u3057\u3001\u30ed\u30c3\u30af\u306e\u89e3\u653e\u3092\u6c38\u4e45\u306b\u5f85\u3061\u3064\u3065\u3051\u308b\u3053\u3068\u304b\u3089\u30b5\u30fc\u30d3\u30b9\u62d2\u5426\uff08DoS\uff09\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u30eb\u30fc\u30c1\u30f31 - \u30ec\u30b8\u30b9\u30c8\u30ea\u304b\u3089\u60aa\u610f\u306e\u3042\u308b\u30ec\u30a4\u30e4\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u307e\u3059\u3002<\/li>\n<li>\u30eb\u30fc\u30c1\u30f31 - \u30ed\u30c3\u30af\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/li>\n<li>\u30eb\u30fc\u30c1\u30f32 - \u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u305f\u30ec\u30a4\u30e4\u3092<span style=\"font-family: 'courier new', courier, monospace;\"><a href=\"https:\/\/linux.die.net\/man\/1\/xz\">xz<\/a><\/span>\u30d0\u30a4\u30ca\u30ea\u3092\u4f7f\u3063\u3066\u5c55\u958b\u3057\u3001\u305d\u306e\u7d50\u679c\u3092<a href=\"https:\/\/linux.die.net\/man\/3\/stdout\">stdout<\/a>\u306b\u51fa\u529b\u3057\u307e\u3059\u3002<\/li>\n<li>\u30eb\u30fc\u30c1\u30f33 - <span style=\"font-family: 'courier new', courier, monospace;\">xz<\/span>\u306e\u7d42\u4e86\u3068stdout\u5185\u306e\u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u53d6\u308a\u3092\u5f85\u6a5f\u3057\u307e\u3059\u3002\u6761\u4ef6\u304c\u6e80\u305f\u3055\u308c\u308b\u3068\u7d9a\u884c\u3057\u3066<span style=\"font-family: 'courier new', courier, monospace;\">chdone<\/span>\u3068\u3044\u3046<a href=\"https:\/\/gobyexample.com\/channels\">\u30c1\u30e3\u30cd\u30eb<\/a>\u3092\u30af\u30ed\u30fc\u30ba\u3057\u307e\u3059\u3002<\/li>\n<li>\u30eb\u30fc\u30c1\u30f31 - <span style=\"font-family: 'courier new', courier, monospace;\">xz<\/span>\u306e\u51fa\u529b\u3092\u5165\u529b\u3068\u3057\u3066\u4f7f\u3044\u3001\u30c7\u30fc\u30bf\u306euntar\u3092\u8a66\u307f\u307e\u3059\u3002\u30d5\u30a1\u30a4\u30eb\u306ftar\u30a2\u30fc\u30ab\u30a4\u30d6\u3067\u306f\u306a\u3044\u3053\u3068\u304b\u3089untar\u306f\u300c<span style=\"font-family: 'courier new', courier, monospace;\">invalid tar header<\/span>\uff08\u7121\u52b9\u306atar\u30d8\u30c3\u30c0\uff09\u300d\u3067\u5931\u6557\u3057\u3001xz\u306estdout\u304b\u3089\u306e\u6b8b\u308a\u306e\u30c7\u30fc\u30bf\u8aad\u307f\u53d6\u308a\u304c\u7d42\u4e86\u3057\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u30c7\u30fc\u30bf\u304c\u8aad\u307f\u53d6\u3089\u308c\u3053\u3068\u304c\u306a\u304f\u306a\u3063\u305f\u305f\u3081\u306b\u30eb\u30fc\u30c1\u30f33\u304c\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u3057\u3001<span style=\"font-family: 'courier new', courier, monospace;\">chdone<\/span>\u304c\u30af\u30ed\u30fc\u30ba\u3055\u308c\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n<li>\u30eb\u30fc\u30c1\u30f31 - \u30eb\u30fc\u30c1\u30f33\u306b\u3088\u308b<span style=\"font-family: 'courier new', courier, monospace;\">chdone<\/span>\u306e\u30af\u30ed\u30fc\u30ba\u3092\u5f85\u6a5f\u3057\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3053\u3053\u3067\u3082\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>\u30eb\u30fc\u30c1\u30f31\u304c\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u3057\u3066\u3044\u308b\u306e\u3067\u30b3\u30f3\u30c6\u30ca\u30a8\u30f3\u30b8\u30f3\u306f\u65b0\u3057\u3044\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5b9f\u884c\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u3068\u3044\u3046\u306e\u3082\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5b9f\u884c\u3059\u308b\u306b\u306f\u30b9\u30c6\u30c3\u30d72\u3067\u30ed\u30c3\u30af\u3092\u53d6\u5f97\u3057\u3066\u3084\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u306e\u30ed\u30c3\u30af\u304c\u89e3\u653e\u3055\u308c\u308b\u3053\u3068\u306f\u306a\u3044\u305f\u3081\u3067\u3059\u3002<\/p>\n<h2>\u5f71\u97ff<\/h2>\n<p>\u4e0a\u8a18\u3067\u8a73\u7d30\u3092\u8aac\u660e\u3057\u305f\u8106\u5f31\u6027\u306f<a href=\"https:\/\/github.com\/containers\/storage\">containers\/storage<\/a>\u306b\u5b58\u5728\u3057\u307e\u3059\u3002CRI-O\u3068Podman\u306f\u3053\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u3063\u3066\u30b9\u30c8\u30ec\u30fc\u30b8\u3092\u7ba1\u7406\u3057\u30b3\u30f3\u30c6\u30ca\u30a4\u30e1\u30fc\u30b8\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3066\u3044\u307e\u3059\u3002\u672c\u8106\u5f31\u6027\u304c\u60aa\u7528\u3055\u308c\u305f\u5834\u5408\u3001\u305d\u3046\u3057\u305f\u91cd\u8981\u306a\u6a5f\u80fd\u304c\u6b63\u5e38\u306b\u884c\u3048\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u30b5\u30fc\u30d3\u30b9\u62d2\u5426\u8106\u5f31\u6027\u304c\u60aa\u7528\u3055\u308c\u305f\u5834\u5408\u306b\u89b3\u6e2c\u3055\u308c\u305f\u5f71\u97ff\u306b\u306f\u6b21\u306e\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h4>CRI-O<\/h4>\n<ol>\n<li>\u65b0\u3057\u3044\u30a4\u30e1\u30fc\u30b8\u306e\u30d7\u30eb\u306b\u5931\u6557\u3059\u308b<\/li>\n<li>\u65b0\u3057\u3044\u30b3\u30f3\u30c6\u30ca\u306e\u8d77\u52d5\u306b\u5931\u6557\u3059\u308b\uff08\u3059\u3067\u306b\u30d7\u30eb\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3082\u542b\u3080\uff09<\/li>\n<li>\u30ed\u30fc\u30ab\u30eb\u30a4\u30e1\u30fc\u30b8\u306e\u30ea\u30b9\u30c8\u53d6\u5f97\u306b\u5931\u6557\u3059\u308b<\/li>\n<li>\u30b3\u30f3\u30c6\u30ca\u306ekill\u306b\u5931\u6557\u3059\u308b<\/li>\n<\/ol>\n<h4>Podman<\/h4>\n<ol>\n<li>\u65b0\u3057\u3044\u30a4\u30e1\u30fc\u30b8\u306e\u30d7\u30eb\u306b\u5931\u6557\u3059\u308b<\/li>\n<li>\u5b9f\u884c\u4e2d\u306e\u30dd\u30c3\u30c9\u306e\u53d6\u5f97\u306b\u5931\u6557\u3059\u308b<\/li>\n<li>\u65b0\u3057\u3044\u30b3\u30f3\u30c6\u30ca\u306e\u8d77\u52d5\u306b\u5931\u6557\u3059\u308b\uff08\u3059\u3067\u306b\u30d7\u30eb\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3082\u542b\u3080\uff09<\/li>\n<li>\u30b3\u30f3\u30c6\u30ca\u5185\u306b\u5165\u3063\u3066\u306eexec\u306b\u5931\u6557\u3059\u308b<\/li>\n<li>\u65e2\u5b58\u306e\u30a4\u30e1\u30fc\u30b8\u53d6\u5f97\u306b\u5931\u6557\u3059\u308b<\/li>\n<li>\u65e2\u5b58\u30b3\u30f3\u30c6\u30ca\u306ekill\u306b\u5931\u6557\u3059\u308b<\/li>\n<\/ol>\n<h4>Kubernetes<\/h4>\n<p>Kubernetes v1.20\u4ee5\u964d\u3067\u306fDocker\u304c\u975e\u63a8\u5968\u306b\u306a\u308a\u3001\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u308b\u30b3\u30f3\u30c6\u30ca\u30a8\u30f3\u30b8\u30f3\u304cCRI-O\u3068Containerd\u306e\u307f\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u306e\u305f\u3081\u3001\u591a\u6570\u306e\u30af\u30e9\u30b9\u30bf\u304cCRI-O\u3092\u4f7f\u7528\u3057\u3066\u3044\u3066\u305d\u308c\u3089\u304c\u8106\u5f31\u3068\u306a\u308b\u72b6\u6cc1\u304c\u767a\u751f\u3057\u304b\u306d\u307e\u305b\u3093\u3002\u653b\u6483\u306e\u30b7\u30ca\u30ea\u30aa\u3068\u3057\u3066\u306f\u3001\u653b\u6483\u8005\u304c\u60aa\u610f\u306e\u3042\u308b\u30a4\u30e1\u30fc\u30b8\u3092\u8907\u6570\u306e\u7570\u306a\u308b\u30ce\u30fc\u30c9\u306b\u5bfe\u3057\u3066\u30d7\u30eb\u3057\u3001\u3059\u3079\u3066\u306e\u30ce\u30fc\u30c9\u3092\u30af\u30e9\u30c3\u30b7\u30e5\u3055\u305b\u3066\u30af\u30e9\u30b9\u30bf\u3092\u6a5f\u80fd\u3055\u305b\u306a\u304f\u3059\u308b\u3053\u3068\u304c\u8003\u3048\u3089\u308c\u307e\u3059\u3002\u3053\u3046\u306a\u308b\u3068\u30ce\u30fc\u30c9\u3092\u518d\u8d77\u52d5\u3059\u308b\u4ee5\u5916\u306b\u554f\u984c\u3092\u4fee\u6b63\u3059\u308b\u65b9\u6cd5\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<figure id=\"attachment_118522\" aria-describedby=\"caption-attachment-118522\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2021\/04\/word-image-83-jp.png\" rel=\"wpdevart_lightbox\"><img  class=\"wp-image-118522 lozad\"  data-src=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2021\/04\/word-image-83-jp.png\" alt=\"\u3053\u306e\u753b\u50cf\u306f\u8d77\u3053\u308a\u3046\u308bKubernetes\u3078\u306e\u653b\u6483\u30d5\u30ed\u30fc\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u56f3\u3067\u306f\u901a\u5e38\u306eCRI-O\u30b3\u30f3\u30c6\u30ca\u30a8\u30f3\u30b8\u30f3\u306eKubelet\u3001API\u30b5\u30fc\u30d0\u30fc\u306b\u5bfe\u3059\u308b\u4f4d\u7f6e\u95a2\u4fc2\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002 \" width=\"900\" height=\"772\" \/><\/a><figcaption id=\"caption-attachment-118522\" class=\"wp-caption-text\">\u56f33 Kubernetes\u306e\u653b\u6483\u30d9\u30af\u30c8\u30eb<\/figcaption><\/figure>\n<h2>\u7d50\u8ad6<\/h2>\n<p>\u3053\u3053\u6570\u5e74\u3001Unit 42\u3092\u542b\u3081\u3001\u3055\u307e\u3056\u307e\u306a\u4eba\u3005\u304c\u30af\u30e9\u30a6\u30c9\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3068\u30b3\u30f3\u30c6\u30ca\u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u76e3\u67fb\u3092\u5b9f\u65bd\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u3046\u3057\u305f\u76e3\u67fb\u306e\u7d50\u679c\u3001\u591a\u304f\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u554f\u984c\u304c\u7279\u5b9a\u30fb\u4fee\u6b63\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u30af\u30e9\u30a6\u30c9\u3078\u306e\u79fb\u884c\u304c\u6025\u30d4\u30c3\u30c1\u3067\u9032\u3093\u3067\u3044\u308b\u73fe\u5728\u3001\u653b\u6483\u8005\u305f\u3061\u3082\u5f15\u304d\u7d9a\u304d\u30af\u30e9\u30a6\u30c9\u3092\u6ce8\u8996\u3057\u3066\u3044\u307e\u3059\u3002\u7b46\u8005\u306e\u30c1\u30fc\u30e0\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u76e3\u67fb\u306e\u5b9f\u65bd\u3001\u91cd\u5927\u306a\u8106\u5f31\u6027\u306e\u767a\u898b\u3001\u30af\u30e9\u30a6\u30c9\u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u306e\u30b5\u30dd\u30fc\u30c8\u306b\u53d6\u308a\u8fbc\u307f\u3001\u7d44\u7e54\u306e\u7686\u3055\u3093\u306e\u4fee\u6b63\u30d7\u30ed\u30b0\u30e9\u30e0\u516c\u958b\u3084\u4fee\u6b63\u30d7\u30ed\u30b0\u30e9\u30e0\u9069\u7528\u306b\u3088\u308b\u554f\u984c\u3078\u306e\u5bfe\u5fdc\u3092\u652f\u63f4\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_118499\" aria-describedby=\"caption-attachment-118499\" style=\"width: 643px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-118500 lozad\"  data-src=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2021\/04\/word-image-84.png\" alt=\"\u3053\u306e\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8\u306f\u3001CVE-2021-20291\u304b\u3089\u306e\u4fdd\u8b77\u306b\u5f79\u7acb\u3064Prisma Cloud\u306eTrusted Images\u3068\u3044\u3046\u6a5f\u80fd\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u56f3\u306f\u3001Trusted Images\u6a5f\u80fd\u306e\u30eb\u30fc\u30eb\u3092\u30aa\u30f3\u306b\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u30e6\u30fc\u30b6\u30fc\u306f\u3001\u4fe1\u983c\u3067\u304d\u308b\u30bd\u30fc\u30b9\u3084\u5b9f\u884c\u3092\u8a31\u53ef\u3059\u308b\u30a4\u30e1\u30fc\u30b8\u3092\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3059\u308b\u305f\u3081\u306e\u30eb\u30fc\u30eb\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002\u30dd\u30ea\u30b7\u30fc\u306e\u5909\u66f4\u306f\u305f\u3060\u3061\u306b\u53cd\u6620\u3055\u308c\u307e\u3059\u3002Console\u30d3\u30e5\u30fc\u3067\u53ef\u8996\u6027\u3092\u5f97\u308b\u306b\u306f\u518d\u30b9\u30ad\u30e3\u30f3\u304c\u5fc5\u8981\u3067\u3059\u3002 \" width=\"643\" height=\"104\" \/><figcaption id=\"caption-attachment-118499\" class=\"wp-caption-text\">\u56f34 Prisma\u306eTrusted Images\u6a5f\u80fd<\/figcaption><\/figure>\n<p>\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e<a 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