{"id":39762,"date":"2021-01-05T10:00:20","date_gmt":"2021-01-05T01:00:20","guid":{"rendered":"https:\/\/www.creationline.com\/?p=39762"},"modified":"2021-01-04T17:11:59","modified_gmt":"2021-01-04T08:11:59","slug":"cve-2020-15257%ef%bc%9a%e6%96%b0%e3%81%9f%e3%81%aa%e8%84%86%e5%bc%b1%e6%80%a7%e3%80%81containerd-shim-api-%e3%82%92%e6%82%aa%e7%94%a8-aqua-%e3%82%b3%e3%83%b3%e3%83%86%e3%83%8a-%e3%82%bb%e3%82%ad","status":"publish","type":"post","link":"https:\/\/www.creationline.com\/tech-blog\/cloudnative\/aquasecurity\/39762","title":{"rendered":"CVE-2020-15257\uff1a\u65b0\u305f\u306a\u8106\u5f31\u6027\u3001containerd-shim API \u3092\u60aa\u7528 #aqua #\u30b3\u30f3\u30c6\u30ca #\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 #\u8106\u5f31\u6027 #containerd #CVE-2020-15257"},"content":{"rendered":"<\/p>\n<p>\u672c\u30d6\u30ed\u30b0\u306f\u300cAqua Security\u300d\u793e\u306e\u6280\u8853\u30d6\u30ed\u30b0\u30672020\u5e7412\u670817\u65e5\u306b\u516c\u958b\u3055\u308c\u305f\u300c<a href=\"https:\/\/blog.aquasec.com\/cve-2020-15257-containerd-shim-api-vulnerability\" rel=\"nofollow noopener noreferrer\" target=\"_blank\"> CVE-2020-15257: New Vulnerability Exploits containerd-shim API <\/a>\u300d\u306e\u65e5\u672c\u8a9e\u7ffb\u8a33\u3067\u3059\u3002<\/p>\n<p><center><img loading=\"lazy\" decoding=\"async\" src=\"\/tech-blog\/cms_x3GWkuX\/wp-content\/uploads\/2020\/12\/83033f742846425240c42873647a76d2.png\" alt=\"\" width=\"868\" height=\"423\" class=\"alignnone size-full wp-image-39767\" srcset=\"https:\/\/www.creationline.com\/tech-blog\/cms_x3GWkuX\/wp-content\/uploads\/2020\/12\/83033f742846425240c42873647a76d2.png 868w, https:\/\/www.creationline.com\/tech-blog\/cms_x3GWkuX\/wp-content\/uploads\/2020\/12\/83033f742846425240c42873647a76d2-360x175.png 360w, https:\/\/www.creationline.com\/tech-blog\/cms_x3GWkuX\/wp-content\/uploads\/2020\/12\/83033f742846425240c42873647a76d2-768x374.png 768w\" sizes=\"auto, (max-width: 868px) 100vw, 868px\" \/><\/center><\/p>\n<h2>CVE-2020-15257\uff1a\u65b0\u305f\u306a\u8106\u5f31\u6027\u3001containerd-shim API \u3092\u60aa\u7528<\/h2>\n<hr \/>\n<p>containerd \u306b\u65b0\u305f\u306a\u8106\u5f31\u6027\u304c\u767a\u898b\u3055\u308c\u307e\u3057\u305f(<a href=\"https:\/\/avd.aquasec.com\/nvd\/cve-2020-15257\/\" rel=\"noopener noreferrer\" target=\"_blank\">CVE-2020-15257<\/a>)\u3002\u3053\u308c\u304c\u60aa\u7528\u3055\u308c\u308b\u3068\u3001\u30b3\u30f3\u30c6\u30ca\u3092\u4ecb\u3057\u3066\u30db\u30b9\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3078\u306e\u63a5\u7d9a\u306b\u6210\u529f\u3057\u305f\u5f8c\u3001\u653b\u6483\u8005\u306f\u30db\u30b9\u30c8\u4e0a\u306e root \u6a29\u9650\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u8106\u5f31\u6027\u306f NCC Group \u793e\u306e Jeff Dileo \u6c0f\u306b\u3088\u3063\u3066\u958b\u793a\u3055\u308c\u305f\u3082\u306e\u3067\u3042\u308a\u3001Team Nautilus \u306b\u3088\u308b\u8abf\u67fb\u7d50\u679c\u3068\u3082\u4e00\u81f4\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>Containerd \u306f\u3001Docker \u3068 Kubernetes \u306e\u57fa\u790e\u3068\u306a\u308b\u696d\u754c\u6a19\u6e96\u306e\u30b3\u30f3\u30c6\u30ca\u30e9\u30f3\u30bf\u30a4\u30e0\u3067\u3059\u3002\u30a4\u30e1\u30fc\u30b8\u306e\u8ee2\u9001\u3068\u4fdd\u7ba1\u3001\u30b3\u30f3\u30c6\u30ca\u306e\u5b9f\u884c\u3068\u76e3\u8996\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30a2\u30bf\u30c3\u30c1\u30e1\u30f3\u30c8\u306a\u3069\u3001\u30db\u30b9\u30c8\u30b7\u30b9\u30c6\u30e0\u306e\u30b3\u30f3\u30c6\u30ca\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u3092\u7ba1\u7406\u3067\u304d\u307e\u3059\u3002Containerd-shim \u306f\u30b3\u30f3\u30c6\u30ca\u3092\u7ba1\u7406\u3059\u308b containerd \u306e\u5b50\u30d7\u30ed\u30bb\u30b9\u3067\u3001containerd-shim API \u3092\u4ecb\u3057\u3066\u30b3\u30f3\u30c6\u30ca\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u306e\u5404\u6a5f\u80fd\u3092  containerd \u306b\u516c\u958b\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e API \u306f\u3001root \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u540d\u524d\u7a7a\u9593\u304b\u3089\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\u306a\u62bd\u8c61\u7684\u306a\u540d\u524d\u7a7a\u9593 UNIX \u30c9\u30e1\u30a4\u30f3\u30bd\u30b1\u30c3\u30c8\u3092\u4ecb\u3057\u3066\u516c\u958b\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u305f\u3081\u30db\u30b9\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3068 UID 0 \u3092\u6301\u3064\u30b3\u30f3\u30c6\u30ca\u306f\u3001\u3053\u306e API \u3078\u306e\u30a2\u30af\u30bb\u30b9\u30fbcontainerd-shim \u306b\u3088\u308b\u7279\u6a29\u30b3\u30f3\u30c6\u30ca\u306e\u5b9f\u884c\u30fb\u7279\u6a29\u53d6\u5f97\u306e\u6709\u52b9\u5316\u30fb\u30db\u30b9\u30c8\u4e0a\u3067\u306e root \u6a29\u9650\u306e\u78ba\u7acb\u306a\u3069\u3001\u60aa\u610f\u306e\u3042\u308b\u30a2\u30af\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30db\u30b9\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u540d\u524d\u7a7a\u9593\u3067\u306e\u30b3\u30f3\u30c6\u30ca\u306e\u5b9f\u884c\u306f\u3001\u4ee5\u4e0b\u306e\u65b9\u6cd5\u3067\u884c\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li>Docker: docker run --net=host\n<li>Kubernetes: .spec.hostNetwork: true\n<\/ul>\n<h3>\u8a73\u7d30\u306b\u6398\u308a\u4e0b\u3052\u308b<\/h3>\n<p>\u62bd\u8c61\u7684\u306a\u540d\u524d\u7a7a\u9593 UNIX \u30c9\u30e1\u30a4\u30f3\u30bd\u30b1\u30c3\u30c8\u306e\u4f7f\u7528\u304c\u3001\u3053\u306e\u8106\u5f31\u6027\u306b\u3064\u306a\u304c\u308b\u4e3b\u306a\u539f\u56e0\u3067\u3057\u305f\u3002\u901a\u5e38\u306e UNIX \u30c9\u30e1\u30a4\u30f3\u30bd\u30b1\u30c3\u30c8\u306f\u30d5\u30a1\u30a4\u30eb\u30d1\u30b9\u306b\u30d0\u30a4\u30f3\u30c9\u3055\u308c\u3066\u304a\u308a\u3001\u4ed6\u306e\u30d5\u30a1\u30a4\u30eb\u3068\u540c\u69d8\u306b\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u62bd\u8c61\u7684\u306a UNIX \u30bd\u30b1\u30c3\u30c8\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u540d\u524d\u7a7a\u9593\u306b\u30d0\u30a4\u30f3\u30c9\u3055\u308c\u3066\u304a\u308a\u3001\u300c\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u30ec\u30b9\u300d\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u3059\u3079\u3066\u300c@\u300d\u8a18\u53f7\u3067\u59cb\u307e\u308b NULL \u30d0\u30a4\u30c8\u306e\u30d5\u30a1\u30a4\u30eb\u306a\u306e\u3067\u3001netstat \u30b3\u30de\u30f3\u30c9\u306e\u5b9f\u884c\u3067\u5bb9\u6613\u306b\u898b\u3064\u3051\u3089\u308c\u307e\u3059\u3002<\/p>\n<p><center><img decoding=\"async\" src=\"https:\/\/blog.aquasec.com\/hs-fs\/hubfs\/Blog\/12-2020%20CVE%202020%2015275\/1-CVE%20Detail%20-1.jpg?width=750&name=1-CVE%20Detail%20-1.jpg\" alt=\"\" \/><\/center><\/p>\n<p>\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u4e0a\u306e\u30d1\u30b9\u306b\u63a5\u7d9a\u3055\u308c\u305f\u3044\u304f\u3064\u304b\u306e UNIX \u30c9\u30e1\u30a4\u30f3\u30bd\u30b1\u30c3\u30c8\u3092\u898b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u304c\u3001\u300c@\/containerd-shim\/.sock@\u300d\u306e\u5f62\u5f0f\u3067\u62bd\u8c61\u7684\u306a\u540d\u524d\u7a7a\u9593 UNIX \u30bd\u30b1\u30c3\u30c8\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059(\u3053\u306e\u30b7\u30b9\u30c6\u30e0\u4e0a\u3067\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u5404 docker \u30b3\u30f3\u30c6\u30ca\u306b\u3064\u304d\u30011\u3064\u305a\u3064)\u3002\u524d\u8ff0\u3057\u305f\u3088\u3046\u306b\u3001\u3053\u308c\u3089\u306e\u30bd\u30b1\u30c3\u30c8\u306f\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u30ec\u30b9\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u30bd\u30b1\u30c3\u30c8\u306b\u306f\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u304c\u7d44\u307f\u8fbc\u307e\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u610f\u5473\u3059\u308b\u306e\u3067\u3001\u8a8d\u8a3c\u3084\u8a8d\u53ef\u306f\u3053\u308c\u3089\u306e\u30bd\u30b1\u30c3\u30c8\u3092\u30ea\u30c3\u30b9\u30f3\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3067\u51e6\u7406\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u6b8b\u5ff5\u306a\u304c\u3089\u3001\u63a5\u7d9a\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u304c containerd-shim \u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u3068\u540c\u3058\u3067\u3042\u308b\u304b\u5426\u304b\u3060\u3051\u304c\u30c1\u30a7\u30c3\u30af\u3055\u308c\u307e\u3059\u3002<\/p>\n<h3>\u60aa\u7528\u306e\u6d41\u308c<\/h3>\n<p>\u3067\u306f\u3001containerd-shim API \u3068\u901a\u4fe1\u3067\u304d\u308b\u3053\u3068\u3092\u8003\u3048\u308b\u3068\u3001\u3053\u306e API \u306f\u4f55\u3092\u63d0\u4f9b\u3057\u3066\u3044\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002containerd-shim API \u306e protobuf(Protocol Buffers) \u3092\u898b\u308b\u3068\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<p><center><img decoding=\"async\" src=\"https:\/\/blog.aquasec.com\/hs-fs\/hubfs\/2-Containerd-shim%20API-1.jpg?width=750&name=2-Containerd-shim%20API-1.jpg\" alt=\"\" \/><\/center><\/p>\n<p>\u4e0a\u8a18\u304b\u3089\u69d8\u3005\u306a\u3053\u3068\u304c\u5b9f\u884c\u53ef\u80fd\u306a\u3053\u3068\u3092\u793a\u3057\u3066\u304a\u308a\u3001\u3068\u304f\u306b Create() \u3068 Start() \u304c\u969b\u7acb\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e API \u306f\u300cdocker create\u300d\u3068\u300cdocker run\u300d\u3068\u4e00\u81f4\u3057\u3066\u304a\u308a\u3001\u30db\u30b9\u30c8\u3092\u4e57\u3063\u53d6\u308b\u306b\u306f\u5341\u5206\u3059\u304e\u308b\u307b\u3069\u306e\u3082\u306e\u3067\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002API \u306b\u7279\u6a29\u30b3\u30f3\u30c6\u30ca\u306e\u8a2d\u5b9a\u3092\u3059\u308b\u3060\u3051\u3067\u3001\u305d\u3053\u304b\u3089\u30db\u30b9\u30c8\u3092\u4e57\u3063\u53d6\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u76f4\u63a5\u30bd\u30b1\u30c3\u30c8\u306b\u901a\u4fe1\u3059\u308b\u3053\u3068\u3067\u3001\u8a2d\u5b9a\u3092\u5b8c\u5168\u306b\u638c\u63e1\u3057\u3001\u4efb\u610f\u306e PID \u540d\u524d\u7a7a\u9593\u306b\u30b1\u30fc\u30d1\u30d3\u30ea\u30c6\u30a3\u3092\u8ffd\u52a0\u3057\u305f\u308a\u3001AppArmor\/Seccomp \u306a\u3069\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8a2d\u5b9a\u3092\u7121\u52b9\u306b\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>\u89e3\u6c7a\u65b9\u6cd5<\/h3>\n<p>\u8106\u5f31\u6027\u304c\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u8106\u5f31\u6027\u306e\u3042\u308b containerd-shim \u30d7\u30ed\u30bb\u30b9\u304c\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u304b\u5426\u304b\u3092\u5224\u65ad\u3057\u307e\u3059\u3002<\/p>\n<pre><code>$ cat \/proc\/net\/unix | grep 'containerd-shim' | grep '@'\n<\/code><\/pre>\n<p>\u81ea\u5206\u306e\u8eab\u3092\u5b88\u308b\u305f\u3081\u306b\u3001\u3044\u304f\u3064\u304b\u306e\u65b9\u6cd5\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<ol>\n<li><b>containerd \u3092\u6700\u65b0\u7248\u306b\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3057\u307e\u3059\u3002<\/b><br \/>\n\u3053\u306e CVE \u306f\u3001containerd v1.4.3.3\/v1.3.9 \u3067\u3001\u62bd\u8c61\u7684\u306a\u540d\u524d\u7a7a\u9593\u30bd\u30b1\u30c3\u30c8\u304b\u3089\u30d5\u30a1\u30a4\u30eb\u30d9\u30fc\u30b9\u306e UNIX \u30bd\u30b1\u30c3\u30c8\u306b\u5207\u308a\u66ff\u3048\u308b\u3053\u3068\u3067\u4fee\u6b63\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<li><b>\u30b3\u30f3\u30c6\u30ca\u3092 root \u4ee5\u5916\u3001\u307e\u305f\u306f UID=0 \u4ee5\u5916\u3067\u5b9f\u884c\u3059\u308b\u3068\u3001\u62bd\u8c61\u7684\u306a\u540d\u524d\u7a7a\u9593\u30bd\u30b1\u30c3\u30c8\u3078\u306e\u30a2\u30af\u30bb\u30b9\u304c\u30d6\u30ed\u30c3\u30af\u3055\u308c\u307e\u3059\u3002<\/b>\n<p>Docker\u3067\u306f\u3001<\/p>\n<pre><code>\ndocker run --net=host --user 11111 --security-opt no-new-privileges\n<\/code><\/pre>\n<p>\u30e6\u30fc\u30b6\u6307\u5b9a\u304c containerd \u306e UID \u3068\u4e00\u81f4\u3057\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3001no-new-privileges \u3092\u4f7f\u7528\u3057\u3066 sudo \u3092\u5229\u7528\u3067\u304d\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n<p>Kubernetes\u3067\u306f\u3001.spec.containers.securityContext \u30d1\u30b9\u3067\u4ee5\u4e0b\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<pre><code>runAsUser: 11111\nallowPrivilegeEscalation: false\n<\/code><\/pre>\n<li><b>AppArmor \u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3001AppArmor \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306b\u3053\u306e\u884c\u3092\u8ffd\u52a0\u3057\u3066\u3001\u3059\u3079\u3066\u306e\u62bd\u8c61\u30bd\u30b1\u30c3\u30c8\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u62d2\u5426\u3057\u307e\u3059\u3002<\/b>\n<pre><code>deny unix addr=@**,<\/code><\/pre>\n<p>Docker\u3067\u306f\u3001<\/p>\n<pre><code>\ndocker run --net=host --security-opt apparmor=<profile-name>\n<\/code><\/pre>\n<p>Kubernetes\u3067\u306f\u3001<\/p>\n<pre><code>\nhttps:\/\/kubernetes.io\/docs\/tutorials\/clusters\/apparmor\/\n<\/code><\/pre>\n<\/ol>\n<p>\u554f\u984c\u3092\u4fee\u6b63\u3057\u305f\u5f8c\u306b\u91cd\u8981\u306a\u306e\u306f\u3001\u30db\u30b9\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u540d\u524d\u7a7a\u9593\u3067\u30b3\u30f3\u30c6\u30ca\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u306f\u3001\u4e00\u822c\u7684\u306b\u5b89\u5168\u3067\u306a\u3044\u3068\u8a8d\u8b58\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u305d\u308c\u3089\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u4e0a\u8a18\u306e\u5236\u9650\u3092\u9069\u7528\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<hr \/>\n<p><a href=\"https:\/\/avd.aquasec.com\/nvd\/cve-2020-15257\/\" rel=\"noopener noreferrer\" target=\"_blank\">CVE-2020-15257<\/a> \u306f\u3001\u5236\u9650\u3055\u308c\u305f\u30b3\u30f3\u30c6\u30ca\u306b\u305f\u3063\u305f 1 \u3064\u4f59\u5206\u306a\u7279\u6a29\u3092\u4e0e\u3048\u305f\u3060\u3051\u3067\u3001\u5b8c\u5168\u306b\u7279\u6a29\u3092\u53d6\u5f97\u3057\u30db\u30b9\u30c8\u3092\u4e57\u3063\u53d6\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3053\u3068\u3092\u793a\u3059\u65b0\u305f\u306a\u826f\u3044\u4f8b\u3067\u3059\u3002\u653b\u6483\u8005\u304c containerd-shim API \u30bd\u30b1\u30c3\u30c8\u3078\u306e\u63a5\u7d9a\u306b\u6210\u529f\u3057\u305f\u5834\u5408\u3001\u30db\u30b9\u30c8\u3092\u76f4\u63a5\u4fb5\u5bb3\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u4eca\u5f8c\u3082\u65b0\u305f\u306a\u8106\u5f31\u6027\u304c\u7d9a\u3005\u3068\u767a\u751f\u3059\u308b\u305f\u3081\u3001\u5883\u754c\u7dda\u306e\u78ba\u4fdd\u3060\u3051\u3067\u306a\u304f\u3001\u30af\u30e9\u30a6\u30c9\u30a4\u30f3\u30d5\u30e9\u5185\u90e8\u306e\u5236\u9650\u3001\u76e3\u8996\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u78ba\u4fdd\u3082\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<table border=\"0\" cellpadding=\"4\" style=\"width: 100%; border-color: #99acc2; border-style: none; border-collapse: collapse; table-layout: fixed;\">\n<tbody>\n<tr>\n<td style=\"width: 100%; background-color: #eeeeee;\">\n<h3><span style=\"color: #07242d;\">\u53c2\u8003<\/span>&nbsp;<\/h3>\n<p><a href=\"https:\/\/research.nccgroup.com\/2020\/12\/10\/abstract-shimmer-cve-2020-15257-host-networking-is-root-equivalent-again\/\" rel=\"noopener noreferrer\" target=\"_blank\">ABSTRACT SHIMMER (CVE-2020-15257): Host Networking is root-Equivalent, Again<\/a><br \/><a href=\"https:\/\/avd.aquasec.com\/nvd\/cve-2020-15257\/\" rel=\"noopener noreferrer\" target=\"_blank\">Aqua Vulnerability Database CVE-2020-15257<\/a><br \/><a href=\"https:\/\/cve.mitre.org\/cgi-bin\/cvename.cgi?name=CVE-2020-15257\" rel=\"noopener noreferrer\" target=\"_blank\">MIRTE CVE-2020-15257<\/a><br \/><a href=\"https:\/\/github.com\/containerd\/containerd\/security\/advisories\/GHSA-36xw-fx78-c5r4\" rel=\"noopener noreferrer\" target=\"_blank\">Containerd Security Advisory<\/a><br \/><a href=\"https:\/\/github.com\/containerd\/containerd\/releases\/tag\/v1.4.3\" rel=\"noopener noreferrer\" target=\"_blank\">Containerd 1.4.3 Patch Release<\/a><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\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<p>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u30d6\u30ed\u30b0\u306f\u300cAqua Security\u300d\u793e\u306e\u6280\u8853\u30d6\u30ed\u30b0\u30672020\u5e7412\u670817\u65e5\u306b\u516c\u958b\u3055\u308c\u305f\u300c CVE-2020-15257: New Vulnerability Exploits containerd-shim API  [&#8230;]<\/p>\n","protected":false},"author":56,"featured_media":39808,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[176],"tags":[174,152,389,423,286,358,376],"class_list":["post-39762","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aquasecurity","tag-aqua","tag-aquasecurity","tag-containerd","tag-cve-2020-15257","tag-286","tag-358","tag-376"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ 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