{"id":117069,"date":"2021-02-09T22:23:51","date_gmt":"2021-02-10T06:23:51","guid":{"rendered":"https:\/\/unit42.paloaltonetworks.com\/?p=117069"},"modified":"2021-02-11T16:52:06","modified_gmt":"2021-02-12T00:52:06","slug":"cve-2021-24074-patch-tuesday","status":"publish","type":"post","link":"https:\/\/origin-unit42.paloaltonetworks.com\/ja\/cve-2021-24074-patch-tuesday\/","title":{"rendered":"\u8105\u5a01\u306b\u95a2\u3059\u308b\u60c5\u5831: Windows IPv4\u304a\u3088\u3073IPv6\u30b9\u30bf\u30c3\u30af\u306e\u8106\u5f31\u6027\uff08CVE-2021-24074 CVE-2021-24086 CVE-2021-24094\uff09"},"content":{"rendered":"<h2>\u6982\u8981<\/h2>\n<p>Microsoft\u306f\u30012021\u5e742\u6708\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u300156\u4ef6\u306e\u516c\u958b\u6e08\u307f\u8106\u5f31\u6027\u306b\u5bfe\u3059\u308b\u30d1\u30c3\u30c1\u3092\u30ea\u30ea\u30fc\u30b9\u3057\u307e\u3057\u305f\u3002<\/p>\n<ul>\n<li><a href=\"https:\/\/msrc.microsoft.com\/update-guide\/en-us\/vulnerability\/CVE-2021-24086\">CVE-2021-24086<\/a>\u3001<a href=\"https:\/\/msrc.microsoft.com\/update-guide\/en-us\/vulnerability\/CVE-2021-24094\">CVE-2021-24094<\/a>: Windows\u306eIPv6\u30b9\u30bf\u30c3\u30af\u306b2\u4ef6\u306e\u30b5\u30fc\u30d3\u30b9\u62d2\u5426\uff08DOS\uff09\u8106\u5f31\u6027<\/li>\n<li><a href=\"https:\/\/msrc.microsoft.com\/update-guide\/en-us\/vulnerability\/CVE-2021-24074\">CVE-2021-24074<\/a>: Windows\u306eIPv4\u30b9\u30bf\u30c3\u30af\u306b\u30ea\u30e2\u30fc\u30c8\u30b3\u30fc\u30c9\u5b9f\u884c\uff08RCE\uff09\u8106\u5f31\u6027<\/li>\n<\/ul>\n<p>CVE-2021-24086\u306b\u306fCommon Vulnerability Scoring System\uff08CVSS\uff09\u30b9\u30b3\u30a2\u30677.5\/6.5\u3001Microsoft\u304b\u3089\u300c\u91cd\u8981\uff08Important\uff09\u300d\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8a55\u4fa1\u304c\u4e0e\u3048\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>CVE-2021-24094\u3001CVE-2021-24074\u306b\u306f\u30019.8\/8.4\u306eCVSS\u30b9\u30b3\u30a2\u3068Microsoft\u304b\u3089\u306e\u300c\u91cd\u5927\uff08Critical\uff09\u300d\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8a55\u4fa1\u304c\u4e0e\u3048\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>CVE-2021-24086\u3001CVE-2021-24094\u306e\u6982\u8981<\/h2>\n<p>\u653b\u6483\u8005\u304c\u7d30\u5de5\u3057\u305f\u591a\u6570\u306eIPv6\u30d1\u30b1\u30c3\u30c8\uff08\u8907\u6570\u306e\u30d8\u30c3\u30c0\u3001\u7121\u52b9\u306a\u30d8\u30c3\u30c0\u3001\u8907\u6570\u306e\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u30d8\u30c3\u30c0\u306a\u3069\uff09\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u3067\u30b5\u30fc\u30d3\u30b9\u62d2\u5426\uff08DoS\uff09\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e<a href=\"https:\/\/www.paloaltonetworks.jp\/network-security\/next-generation-firewall\">\u6b21\u4e16\u4ee3\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb<\/a>\u3092\u3054\u5229\u7528\u4e2d\u306e\u304a\u5ba2\u69d8\u306f\u3001PAN-OS \u306b\u3088\u308a\u3053\u308c\u3089\u60aa\u610f\u306e\u3042\u308b\u30d1\u30b1\u30c3\u30c8\u3092\u30d6\u30ed\u30c3\u30af\u3057\u3001\u653b\u6483\u3092\u7de9\u548c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e\u6b21\u4e16\u4ee3\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3092\u304a\u4f7f\u3044\u306e\u304a\u5ba2\u69d8\u3067\u3001IPv6\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3092\u6709\u52b9\u306b\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u3053\u308c\u30892\u3064\u306e\u8106\u5f31\u6027\u306b\u5bfe\u3057\u3066\u3059\u3067\u306b\u4fdd\u8b77\u3055\u308c\u3066\u3044\u307e\u3059\u3002IPv6\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3092\u6709\u52b9\u306b\u3059\u308b\u306b\u306f\u3001\u7ba1\u7406\u753b\u9762\u3067 [Device]\u3001[\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7]\u3001[\u30bb\u30c3\u30b7\u30e7\u30f3]\u306e\u9806\u306b\u958b\u304d\u3001[IPv6 \u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u8a2d\u5b9a] \u30c1\u30a7\u30c3\u30af\u30dc\u30c3\u30af\u30b9\u3092\u6709\u52b9\u306b\u3057\u3066\u5909\u66f4\u3092\u30b3\u30df\u30c3\u30c8\u3057\u307e\u3059\u3002IPv6\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306e\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001\u30ca\u30ec\u30c3\u30b8\u30d9\u30fc\u30b9\u300c<a href=\"https:\/\/knowledgebase.paloaltonetworks.com\/KCSArticleDetail?id=kA10g000000ClMLCA0\">How to Enable and Disable IPv6 Firewalling\uff08IPv6\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3092\u6709\u52b9\u307e\u305f\u306f\u7121\u52b9\u306b\u3059\u308b\u65b9\u6cd5\uff09<\/a>\u300d\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p><figure id=\"attachment_117056\" aria-describedby=\"caption-attachment-117056\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-117057 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2021\/02\/word-image-48.png\" alt=\"\u3053\u306e\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8\u306f\u3001IPv6\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3092\u6709\u52b9\u306b\u3057\u3066CVE-2021-24086\u306a\u3069\u3092\u7de9\u548c\u3059\u308b\u305f\u3081\u306e\u30bb\u30c3\u30b7\u30e7\u30f3\u306e\u8a2d\u5b9a\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u753b\u50cf\u306e\u4e0b\u90e8\u306b\u3042\u308b\u30c1\u30a7\u30c3\u30af\u30dc\u30c3\u30af\u30b9\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002 \" width=\"900\" height=\"256\" \/><figcaption id=\"caption-attachment-117056\" class=\"wp-caption-text\">\u56f31 [IPv6\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u8a2d\u5b9a]\u306e\u6709\u52b9\u5316<\/figcaption><\/figure>\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u6b21\u4e16\u4ee3\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3092\u3054\u5229\u7528\u306e\u304a\u5ba2\u69d8\u306f\u3001\u30b3\u30de\u30f3\u30c9DoS\u653b\u6483\u4e2d\u306e\u30d1\u30b1\u30c3\u30c8 \u30c9\u30ed\u30c3\u30d7\u306b\u95a2\u3059\u308b<a href=\"https:\/\/knowledgebase.paloaltonetworks.com\/KCSArticleDetail?id=kA10g000000ClXOCA0\">\u8a73\u7d30<\/a>\u3092\u3001\u30b3\u30de\u30f3\u30c9 <span class=\"lang:default decode:true crayon-inline \">show counter global filter delta yes | match flow_parse_ip6<\/span>\u00a0\u3067\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u6700\u5f8c\u306b\u3053\u306e\u30b3\u30de\u30f3\u30c9\u304c\u5b9f\u884c\u3055\u308c\u3066\u4ee5\u964d\u306b\u30c9\u30ed\u30c3\u30d7\u3055\u308c\u305fIPv6\u30d1\u30b1\u30c3\u30c8\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u305f\u3068\u3048\u3070\u3001\u4ee5\u4e0b\u306f\u3001\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306b\u5bfe\u3057\u3066\u7d30\u5de5\u3055\u308c\u305fIPv6\u30d1\u30b1\u30c3\u30c8\u3092\u4f7f\u7528\u3057\u3066DoS\u653b\u6483\u3092\u5b9f\u884c\u3057\u305f\u5f8c\u306e\u30b3\u30de\u30f3\u30c9\u306e\u51fa\u529b\u3067\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u5207\u308a\u6368\u3066\u3089\u308c\u305f\u30d1\u30b1\u30c3\u30c8\u304c\u539f\u56e0\u306790\u500b\u306eIPv6\u30d1\u30b1\u30c3\u30c8\u304c\u30c9\u30ed\u30c3\u30d7\u3055\u308c\u3066\u304a\u308a\u3001\u7121\u52b9\u306a\u30d8\u30c3\u30c0\u4f4d\u7f6e\u304c\u539f\u56e0\u30676\u500b\u306e\u30d1\u30b1\u30c3\u30c8\u304c\u30c9\u30ed\u30c3\u30d7\u3055\u308c\u3066\u304a\u308a\u3001IPv6\u30d1\u30b1\u30c3\u30c8\u306b\u8907\u6570\u5b58\u5728\u3059\u308b\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u30d8\u30c3\u30c0\u304c\u539f\u56e0\u30671\u500b\u306e\u30d1\u30b1\u30c3\u30c8\u304c\u30c9\u30ed\u30c3\u30d7\u3055\u308c\u305f\u3053\u3068\u304c\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true \">admin@PA-3020&gt; show counter global filter delta yes | match flow_parse_ip6\r\nflow_parse_ip6_truncated 90 4 drop flow parse Packets dropped: IPv6 packet truncated\r\nflow_parse_ip6_invalid_routing_ext_hdr 6 0 drop flow parse Packets dropped: invalid routing header position in IPv6 packet\r\nflow_parse_ip6_frag_nested 1 0 drop flow parse Packets dropped: multiple fragment header in IPv6 packet<\/pre>\n<h2>CVE-2021-24074\u306e\u6982\u8981<strong><br \/>\n<\/strong><\/h2>\n<p>\u653b\u6483\u8005\u304c\u3053\u306e\u8106\u5f31\u6027\u3092\u60aa\u7528\u3057\u3001\u60aa\u610f\u306e\u3042\u308bIPv4\u30d1\u30b1\u30c3\u30c8\u3092\u4f5c\u6210\u3057\u3066\u6a19\u7684\u30b7\u30b9\u30c6\u30e0\u306b\u9001\u4fe1\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u5bfe\u8c61\u3068\u306a\u3063\u305f\u30b7\u30b9\u30c6\u30e0\u3078\u306e\u30ea\u30e2\u30fc\u30c8\u30b3\u30fc\u30c9\u5b9f\u884c\uff08RCE\uff09\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u8106\u5f31\u6027\u306f\u30012\u3064\u306e\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u9593\u3067\u6df7\u540c\u3055\u308c\u305f<a href=\"https:\/\/tools.ietf.org\/html\/rfc7126#section-4.3\">IPv4\u30aa\u30d7\u30b7\u30e7\u30f3 \u30d5\u30a3\u30fc\u30eb\u30c9<\/a>\u304c\u539f\u56e0\u3067\u767a\u751f\u3057\u307e\u3059\u3002Microsoft\u304c\u6307\u6458\u3057\u305f\u30b7\u30ca\u30ea\u30aa\u3067\u306f\u30012\u3064\u306eIPv4\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u304c\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u6700\u521d\u306e\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u304c[Security Options]\uff08Type 130\uff09\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u6301\u3061\u3001\u305d\u306e\u5f8c\u306b\u7d9a\u304f2\u3064\u76ee\u306e\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u306b[Loose Source and Record Route\uff08LSRR\uff09]\u30aa\u30d7\u30b7\u30e7\u30f3\uff08Type 131\uff09\u304b[Strict Source and Record Route]\uff08Type 137\uff09\u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u3042\u308b\u30b1\u30fc\u30b9\u3067\u3059\u3002\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8 \u30aa\u30d5\u30bb\u30c3\u30c8\u306f\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u30d8\u30c3\u30c0 \u30c7\u30fc\u30bf\u3092\u6df7\u540c\u3057\u3066\u3044\u3063\u3057\u3087\u306b\u3057\u3066\u3057\u307e\u3044\u3001IP\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u306e\u518d\u69cb\u7bc9\u4e2d\u3001\u7bc4\u56f2\u5916\u306e\u8aad\u307f\u53d6\u308a\u3068\u66f8\u304d\u8fbc\u307f\u3092\u5f15\u304d\u8d77\u3053\u3057\u3066Windows\u30de\u30b7\u30f3\u306b\u30ea\u30e2\u30fc\u30c8\u30b3\u30fc\u30c9\u5b9f\u884c\u306e\u53ef\u80fd\u6027\u3092\u3082\u305f\u3089\u3057\u307e\u3059\u3002<\/p>\n<h2><a id=\"post-117052-_q5nn05yam7vm\"><\/a>\u6b21\u4e16\u4ee3\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3067\u306e\u7de9\u548c\u7b56\uff08CVE-2021-24074\uff09<\/h2>\n<p>\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e\u6b21\u4e16\u4ee3\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3092\u3054\u5229\u7528\u4e2d\u306e\u304a\u5ba2\u69d8\u3067\u3001PAN-OS\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u304c8.1\u307e\u305f\u306f\u305d\u308c\u4ee5\u4e0a\u3092\u304a\u4f7f\u3044\u306e\u5834\u5408\u3001[Network]\u3001[\u30be\u30fc\u30f3]\u3067\u8a2d\u5b9a\u3059\u308b[\u30be\u30fc\u30f3 \u30d7\u30ed\u30c6\u30af\u30b7\u30e7\u30f3 \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb]\u306b\u3088\u308a\u3001CVE-2021-24074\u95a2\u9023\u306e\u653b\u6483\u304b\u3089\u4fdd\u8b77\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u306b\u306f\u3001IP\u30c9\u30ed\u30c3\u30d7\u306e\u8a2d\u5b9a\u3067\u3001<strong>[\u7570\u5e38\u306a\u5f62\u5f0f]\u3001[\u30b9\u30c8\u30ea\u30af\u30c8 \u30bd\u30fc\u30b9 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0]\u3001[\u30eb\u30fc\u30ba \u30bd\u30fc\u30b9 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0]<\/strong>\u306e\u5404 IP \u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u6709\u52b9\u306b\u3057\u3066\u30c9\u30ed\u30c3\u30d7\u3059\u308b\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<p>\u306a\u304a\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u3067\u306f\u3001IP\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u3057\u3066\u3001<strong>[\u7570\u5e38\u306a\u5f62\u5f0f]\u306e\u30d1\u30b1\u30c3\u30c8\u306e\u30c9\u30ed\u30c3\u30d7\u3084\u3001[\u30b9\u30c8\u30ea\u30af\u30c8 \u30bd\u30fc\u30b9 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0]\u3001[\u30eb\u30fc\u30ba \u30bd\u30fc\u30b9 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0]<\/strong>\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u3064\u3044\u305f\u30d1\u30b1\u30c3\u30c8\u3092\u30c9\u30ed\u30c3\u30d7\u3059\u308b\u8a2d\u5b9a\u3092\u6709\u52b9\u5316\u3059\u308b\u3053\u3068\u3092\u63a8\u5968\u3057\u3066\u3044\u308b\u3053\u3068\u306b\u3054\u6ce8\u610f\u304f\u3060\u3055\u3044\u3002\u3053\u308c\u306f\u3001[\u30b9\u30c8\u30ea\u30af\u30c8 \u30bd\u30fc\u30b9 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0]\u3001[\u30eb\u30fc\u30ba \u30bd\u30fc\u30b9 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0]\u306a\u3069\u306eIP\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u3082\u3064\u30d1\u30b1\u30c3\u30c8\u3092\u8a31\u53ef\u3057\u3066\u3057\u307e\u3046\u3068\u3001\u653b\u6483\u8005\u304c\u5b9b\u5148IP\u30a2\u30c9\u30ec\u30b9\u3092\u4e00\u81f4\u6761\u4ef6\u3068\u3059\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30dd\u30ea\u30b7\u30fc \u30eb\u30fc\u30eb\u3092\u30d0\u30a4\u30d1\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u305f\u3081\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001TechDocs\u306e\u8a18\u4e8b\u300c<a href=\"https:\/\/docs.paloaltonetworks.com\/pan-os\/10-0\/pan-os-admin\/zone-protection-and-dos-protection\/zone-defense\/zone-protection-profiles\/packet-based-attack-protection.html\">Packet-Based Attack Protection\uff08\u30d1\u30b1\u30c3\u30c8 \u30d9\u30fc\u30b9\u306e\u653b\u6483\u4fdd\u8b77\uff09<\/a>\u300d\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u300c<a href=\"https:\/\/docs.paloaltonetworks.com\/pan-os\/10-0\/pan-os-admin\/zone-protection-and-dos-protection\/configure-zone-protection-to-increase-network-security\/configure-packet-based-attack-protection.html\">Configure Packet Based Attack Protection\uff08\u30d1\u30b1\u30c3\u30c8 \u30d9\u30fc\u30b9\u306e\u653b\u6483\u4fdd\u8b77\u3092\u69cb\u6210\u3059\u308b\uff09<\/a>\u300d\u306e\u30da\u30fc\u30b8\u306b\u306f\u3001IP\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u7279\u5b9a\u306e\u30d1\u30b1\u30c3\u30c8\u3092\u30c9\u30ed\u30c3\u30d7\u3059\u308b\u3088\u3046\u306b\u30be\u30fc\u30f3 \u30d7\u30ed\u30c6\u30af\u30b7\u30e7\u30f3 \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u69cb\u6210\u3059\u308b\u624b\u9806\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3067IP\u30d1\u30b1\u30c3\u30c8\u3092\u30c9\u30ed\u30c3\u30d7\u3059\u308b\u3088\u3046\u30be\u30fc\u30f3\u30d7\u30ed\u30c6\u30af\u30b7\u30e7\u30f3\u3092\u69cb\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p><strong>\u624b\u98061: <\/strong>\u30be\u30fc\u30f3 \u30d7\u30ed\u30c6\u30af\u30b7\u30e7\u30f3 \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u3001\u30d1\u30b1\u30c3\u30c8 \u30d9\u30fc\u30b9\u306e\u653b\u6483\u4fdd\u8b77\u306e\u8a2d\u5b9a\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n<ol>\n<li><strong>[Network]\u3001[\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb]\u3001[\u30be\u30fc\u30f3 \u30d7\u30ed\u30c6\u30af\u30b7\u30e7\u30f3]<\/strong>\u306e\u9806\u306b\u9078\u629e\u3057\u3001<strong>[\u8ffd\u52a0]<\/strong>\u3067\u65b0\u3057\u3044\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/li>\n<li>\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306e<strong>[\u540d\u524d]<\/strong>\u3068\u30aa\u30d7\u30b7\u30e7\u30f3\u306e<strong>[\u5185\u5bb9]<\/strong>\u3092\u5165\u529b\u3057\u307e\u3059\u3002<\/li>\n<li><strong>[\u30d1\u30b1\u30c3\u30c8 \u30d9\u30fc\u30b9\u306e\u653b\u6483\u4fdd\u8b77]<\/strong>\u3092\u9078\u629e\u3057\u307e\u3059\u3002<\/li>\n<li>[IP\u30c9\u30ed\u30c3\u30d7]\u30bf\u30d6\u3067\u3001<a href=\"https:\/\/docs.paloaltonetworks.com\/pan-os\/9-0\/pan-os-admin\/zone-protection-and-dos-protection\/zone-defense\/zone-protection-profiles\/packet-based-attack-protection\">[\u30d1\u30b1\u30c3\u30c8 \u30d9\u30fc\u30b9\u306e\u653b\u6483\u4fdd\u8b77]<\/a>\u8a2d\u5b9a\u3092\u9078\u629e\u3057\u3001[IP \u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u30c9\u30ed\u30c3\u30d7]\u4ee5\u4e0b\u306b\u3042\u308b<strong>[\u7570\u5e38\u306a\u5f62\u5f0f]\u3001[\u30b9\u30c8\u30ea\u30af\u30c8 \u30bd\u30fc\u30b9 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0]<\/strong>\u3001<strong>[\u30eb\u30fc\u30ba \u30bd\u30fc\u30b9 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0]<\/strong>\u30aa\u30d7\u30b7\u30e7\u30f3\u306b\u30c1\u30a7\u30c3\u30af\u3092\u5165\u308c\u307e\u3059\u3002<\/li>\n<li><strong>OK<\/strong>\u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002\n<p><figure id=\"attachment_117058\" aria-describedby=\"caption-attachment-117058\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-117059 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2021\/02\/word-image-49.png\" alt=\"\u6b21\u4e16\u4ee3\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3067CVE-2021-24074\u3092\u7de9\u548c\u3059\u308b\u305f\u3081\u306b\u3001\u3053\u306e\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8\u306b\u793a\u3059\u3088\u3046\u306b\u30be\u30fc\u30f3 \u30d7\u30ed\u30c6\u30af\u30b7\u30e7\u30f3 \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u69cb\u6210\u3067\u304d\u307e\u3059\u3002IP\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u30c9\u30ed\u30c3\u30d7\u306e\u9078\u629e\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044 \" width=\"900\" height=\"511\" \/><figcaption id=\"caption-attachment-117058\" class=\"wp-caption-text\">\u56f32 IP\u30c9\u30ed\u30c3\u30d7\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u305f\u30be\u30fc\u30f3 \u30d7\u30ed\u30c6\u30af\u30b7\u30e7\u30f3 \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306e\u69cb\u6210<\/figcaption><\/figure><\/li>\n<\/ol>\n<p><strong>\u624b\u98062: <\/strong>\u4fdd\u8b77\u5bfe\u8c61\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u3066\u3044\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 \u30be\u30fc\u30f3\u306b\u30be\u30fc\u30f3 \u30d7\u30ed\u30c6\u30af\u30b7\u30e7\u30f3 \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u9069\u7528\u3057\u307e\u3059\u3002<\/p>\n<ol>\n<li><strong>[Network]\u3001[\u30be\u30fc\u30f3]<\/strong>\u306e\u9806\u306b\u9078\u629e\u3057\u3001\u30be\u30fc\u30f3 \u30d7\u30ed\u30c6\u30af\u30b7\u30e7\u30f3 \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u5272\u308a\u5f53\u3066\u308b\u30be\u30fc\u30f3\u3092\u9078\u629e\u3057\u307e\u3059\u3002<\/li>\n<li>\u305d\u306e\u30be\u30fc\u30f3\u306b\u5c5e\u3059\u308b<strong>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9<\/strong>\u3092<strong>\u8ffd\u52a0<\/strong>\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u30be\u30fc\u30f3 \u30d7\u30ed\u30c6\u30af\u30b7\u30e7\u30f3 \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb<\/strong>\u306b\u5bfe\u3057\u3001\u3055\u304d\u307b\u3069\u4f5c\u6210\u3057\u305f\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u9078\u629e\u3057\u307e\u3059\u3002<\/li>\n<li><strong>OK<\/strong>\u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<figure id=\"attachment_117060\" aria-describedby=\"caption-attachment-117060\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-117061 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2021\/02\/word-image-50.png\" alt=\"\u3053\u306e\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8\u306f\u3001CVE-2021-24074\u3092\u7de9\u548c\u3059\u308b\u305f\u3081\u306b\u3001\u30be\u30fc\u30f3\u3092\u69cb\u6210\u3057\u3001\u30be\u30fc\u30f3 \u30d7\u30ed\u30c6\u30af\u30b7\u30e7\u30f3 \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u9078\u629e\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u9078\u629e\u5185\u5bb9\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044 \" width=\"900\" height=\"669\" \/><figcaption id=\"caption-attachment-117060\" class=\"wp-caption-text\">\u56f33 \u30be\u30fc\u30f3\u3092\u69cb\u6210\u3057\u3066\u30be\u30fc\u30f3 \u30d7\u30ed\u30c6\u30af\u30b7\u30e7\u30f3 \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u9078\u629e<\/figcaption><\/figure>\n<p><strong>\u624b\u98063: \u5909\u66f4\u3092\u30b3\u30df\u30c3\u30c8\u3057\u307e\u3059\u3002<\/strong><\/p>\n<p><strong>\u624b\u98064: <\/strong> \uff08PAN-OS 8.1.2\u4ee5\u964d\uff09\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u304c\u653b\u6483\u306e\u8105\u5a01\u30ed\u30b0\u3092\u751f\u6210\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u5bfe\u5fdc\u3059\u308b\u30d1\u30b1\u30c3\u30c8 \u30d9\u30fc\u30b9\u306e\u653b\u6483\u4fdd\u8b77\u3092\u6709\u52b9\u306b\u3057\u305f\u5834\u5408\uff08\u624b\u98061\uff09\u3001\u4e0a\u8a18\u306e\u7a2e\u985e\u306e\u30d1\u30b1\u30c3\u30c8\u306e\u8105\u5a01\u30ed\u30b0\u3082\u751f\u6210\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u30eb\u30fc\u30ba \u30bd\u30fc\u30b9 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u30d1\u30b1\u30c3\u30c8 \u30d9\u30fc\u30b9\u306e\u653b\u6483\u4fdd\u8b77\u3092\u6709\u52b9\u306b\u3057\u305f\u5834\u5408\u3001\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3 \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\uff08CLI\uff09\u3092\u4f7f\u7528\u3057\u3066\u304a\u304f\u3068\u3001\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u304cLSRR\u30aa\u30d7\u30b7\u30e7\u30f3\u3064\u304d\u30d1\u30b1\u30c3\u30c8\u306e\u53d7\u4fe1\u30fb\u30c9\u30ed\u30c3\u30d7\u3092\u884c\u3063\u305f\u3055\u3044\u3001\u305d\u306e\u8105\u5a01\u30ed\u30b0\u304c\u751f\u6210\u3055\u308c\u307e\u3059\u3002\u304a\u5ba2\u69d8\u3067\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306b\u3053\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u5229\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<ol>\n<li><a href=\"https:\/\/docs.paloaltonetworks.com\/pan-os\/9-0\/pan-os-cli-quick-start\/get-started-with-the-cli\/access-the-cli\">CLI\u306b\u30a2\u30af\u30bb\u30b9\u3057\u307e\u3059\u3002<\/a><\/li>\n<li>\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3CLI\u30b3\u30de\u30f3\u30c9\u306e<span class=\"lang:default decode:true crayon-inline \">set system setting additional-threat-log on<\/span>\u00a0\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u30c7\u30d5\u30a9\u30eb\u30c8\u306f<span class=\"lang:default decode:true crayon-inline \">off<\/span>\u00a0\u3067\u3059\u3002<\/li>\n<\/ol>\n<p><figure id=\"attachment_117062\" aria-describedby=\"caption-attachment-117062\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-117063 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2021\/02\/word-image-51.png\" alt=\"\u3053\u306e\u4f8b\u306f\u3001\u6b21\u4e16\u4ee3\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306eUI\u306b\u8105\u5a01\u30ed\u30b0\u304c\u3069\u306e\u3088\u3046\u306b\u8868\u793a\u3055\u308c\u308b\u304b\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u3001[\u7570\u5e38\u306a\u5f62\u5f0f] \u306eIP\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u8105\u5a01\u30ed\u30b0\u3067\u3059\u3002 \" width=\"900\" height=\"295\" \/><figcaption id=\"caption-attachment-117062\" class=\"wp-caption-text\">\u56f34 [\u7570\u5e38\u306a\u5f62\u5f0f] IP\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u8105\u5a01\u30ed\u30b0<\/figcaption><\/figure>\u8105\u5a01\u30ed\u30b0\u306f\u3001\u56f34\u306b\u793a\u3059\u3088\u3046\u306b\u3001\u7ba1\u7406\u753b\u9762\u304b\u3089\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u5225\u306e\u65b9\u6cd5\u3068\u3057\u3066\u3001\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e\u6b21\u4e16\u4ee3\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3092\u3054\u5229\u7528\u306e\u304a\u5ba2\u69d8\u306f\u3001<span style=\"font-family: 'courier new', courier, monospace;\">flow_dos_pf_badoption\u3001flow_dos_pf_strictsource\u3001flow_dos_pf_strictsource<\/span><a href=\"https:\/\/knowledgebase.paloaltonetworks.com\/KCSArticleDetail?id=kA10g000000ClOKCA0\">\u30d5\u30ed\u30fc\u306e\u30ab\u30a6\u30f3\u30bf<\/a>\u3092\u4f7f\u3063\u3066\u3001\u30be\u30fc\u30f3 \u30d7\u30ed\u30c6\u30af\u30b7\u30e7\u30f3\u306b\u8d77\u56e0\u3059\u308bIPv4\u30d1\u30b1\u30c3\u30c8\u306e\u30c9\u30ed\u30c3\u30d7\u306e<a href=\"https:\/\/knowledgebase.paloaltonetworks.com\/KCSArticleDetail?id=kA10g000000ClXOCA0\">\u8a73\u7d30<\/a>\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u305f\u3068\u3048\u3070\u3001\u30b3\u30de\u30f3\u30c9<span class=\"lang:default decode:true crayon-inline \">show counter global filter delta yes | match flow_dos_pf_badoption<\/span>\u00a0\u3067\u3001\u3053\u306e\u30b3\u30de\u30f3\u30c9\u304c\u6700\u5f8c\u306b\u767a\u884c\u3055\u308c\u3066\u4ee5\u964d\u306b\u30c9\u30ed\u30c3\u30d7\u3055\u308c\u305fIPv4\u30d1\u30b1\u30c3\u30c8\u3092\u8868\u793a\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">admin@PA-5250&gt; show counter global filter delta yes | match flow_dos_pf_badoption\r\nflow_dos_pf_badoption 1 0 drop flow dos Packets dropped: Zone protection option 'discard-malformed-option'<\/pre>\n<p>CVE-2021-24074\u306b\u3064\u3044\u3066\u306f\u3001[\u7570\u5e38\u306a\u5f62\u5f0f] \u306e\u30be\u30fc\u30f3 \u30d7\u30ed\u30c6\u30af\u30b7\u30e7\u30f3 IP \u30c9\u30ed\u30c3\u30d7 \u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u6709\u52b9\u306b\u306a\u3063\u3066\u3044\u308b\u5834\u5408\u3001\u5f8c\u7d9a\u30d1\u30b1\u30c3\u30c8\u306b\u5bfe\u3057\u3066[\u30b9\u30c8\u30ea\u30af\u30c8 \u30bd\u30fc\u30b9 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0]\u3001[\u30eb\u30fc\u30ba \u30bd\u30fc\u30b9 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0]\u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u30c8\u30ea\u30ac\u30fc\u3055\u308c\u308b\u3088\u3046\u306a\u5f62\u5f0f\u306b\u7570\u5e38\u306e\u3042\u308b\u30d1\u30b1\u30c3\u30c8\u306f\u30c9\u30ed\u30c3\u30d7\u3055\u308c\u307e\u3059\u3002\u30eb\u30fc\u30ba \u30bd\u30fc\u30b9 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3001\u30b9\u30c8\u30ea\u30af\u30c8 \u30bd\u30fc\u30b9 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0 \u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u3064\u3044\u305f\u5f8c\u7d9aIP\u30d1\u30b1\u30c3\u30c8\u306f\u3001\u5185\u90e8\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306e\u30d1\u30b1\u30c3\u30c8 \u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306b\u3088\u308a\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306b\u9001\u4fe1\u3055\u308c\u307e\u305b\u3093\u3002IPv4\u306e\u30bd\u30fc\u30b9 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u306f\u5b89\u5168\u3067\u306a\u3044\u3068\u898b\u306a\u3055\u308c\u308b\u305f\u3081\u3001\u300c\u30eb\u30fc\u30ba \u30bd\u30fc\u30b9 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u300d\u304a\u3088\u3073\u300c\u30b9\u30c8\u30ea\u30af\u30c8 \u30bd\u30fc\u30b9 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u300d\u30be\u30fc\u30f3 \u30d7\u30ed\u30c6\u30af\u30b7\u30e7\u30f3 IP \u30c9\u30ed\u30c3\u30d7 \u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u6709\u52b9\u306b\u306a\u3063\u3066\u3044\u308b\u5834\u5408\u3001\u30bd\u30fc\u30b9 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0 \u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u3064\u3044\u305f\u4ed6\u306eIPv4\u30d1\u30b1\u30c3\u30c8\u306f\u30c9\u30ed\u30c3\u30d7\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>CVE-2021-24074\u3001CVE-2021-24086\u3001CVE-2021-24094\u306b\u5bfe\u3059\u308bCortex XDR\u306e\u7de9\u548c\u7b56<\/h2>\n<p>\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9 Cortex XDR \u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u306e\u30d0\u30fc\u30b8\u30e7\u30f37.1\u4ee5\u964d\u3092\u3054\u5229\u7528\u306e\u304a\u5ba2\u69d8\u306e\u5834\u5408\u30012021\u5e742\u670810\u65e5\u4ee5\u964d\u3001Windows Update\u304c\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u308b\u307e\u3067\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u9069\u7528\u3055\u308c\u3066\u3044\u306a\u3044\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u3092\u3053\u308c\u3089\u306e\u8106\u5f31\u6027\u304b\u3089\u4fdd\u8b77\u3059\u308b\u3088\u3046\u3001\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u3092\u4f7f\u3063\u3066\u30b7\u30b9\u30c6\u30e0\u8a2d\u5b9a\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u56de\u907f\u7b56\u306f\u3001\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306e\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8 \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u4ecb\u3057\u3066\u7ba1\u7406\u3055\u308c\u3001\u6700\u65b0\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u66f4\u65b0\u304c\u5fc5\u8981\u3067\u3059\u3002\u65e2\u5b58\u306eProfile\u3092\u7de8\u96c6\u3059\u308b\u304b\u3001\u65b0\u3057\u3044Profile\u3092\u4f5c\u6210\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u56de\u907f\u7b56\u3092\u542b\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>[<em>Unpatched Vulnerabilities Protection\uff08\u30d1\u30c3\u30c1\u304c\u9069\u7528\u3055\u308c\u3066\u3044\u306a\u3044\u8106\u5f31\u6027\u306e\u4fdd\u8b77\uff09<\/em>]\u30bb\u30af\u30b7\u30e7\u30f3\u4ee5\u4e0b\u3067\u6b21\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u3044\u305a\u308c\u304b\u3092\u9078\u629e\u3057\u3066\u3001CVE-2021-24074\u3001CVE-2021-24086\u3001CVE-2021-24094\u306e\u56de\u907f\u7b56\u306e\u8a2d\u5b9a\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>Do not modify system settings (\u30c7\u30d5\u30a9\u30eb\u30c8)<\/strong>: \u73fe\u5728\u306e\u5024\u304c\u3054\u81ea\u8eab\u3067\u8a2d\u5b9a\u3055\u308c\u305f\u5024\u3067\u3042\u308b\u304b\u3001\u56de\u907f\u7b56\u306e\u4e00\u74b0\u3068\u3057\u3066\u5909\u66f4\u3055\u308c\u305f\u5024\u3067\u3042\u308b\u304b\u306b\u304b\u304b\u308f\u3089\u305a\u3001\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306b\u73fe\u5728\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308bIPv4\u3001IPv6\u8a2d\u5b9a\u3092\u5909\u66f4\u3057\u307e\u305b\u3093\u3002<\/li>\n<li><strong>Modify system settings until the endpoint is patched:<\/strong> Cortex XDR \u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u306f\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u4e0a\u3067\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u9069\u7528\u3055\u308c\u308b\u307e\u3067\u306e\u9593\u3001\u4e00\u6642\u7684\u306bIPv4\u3001IPv6\u306e\u8a2d\u5b9a\u3092\u5909\u66f4\u3057\u307e\u3059\u3002\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306b\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u9069\u7528\u3055\u308c\u305f\u5f8c\u3001\u5909\u66f4\u3055\u308c\u305f\u3059\u3079\u3066\u306eWindows\u30b7\u30b9\u30c6\u30e0\u8a2d\u5b9a\u306f\u3001\u5909\u66f4\u524d\u306e\u5024\u306b\u81ea\u52d5\u7684\u306b\u623b\u3055\u308c\u307e\u3059\u3002\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u3067\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u3053\u306e\u56de\u907f\u7b56\u3092\u9069\u7528\u3059\u308b\u524d\u306b\u3001\u3053\u308c\u3089\u306e\u30b3\u30de\u30f3\u30c9\u3092\u78ba\u8a8d\u3057\u3001\u30d3\u30b8\u30cd\u30b9\u30af\u30ea\u30c6\u30a3\u30ab\u30eb\u306a\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u5f71\u97ff\u3084\u640d\u5bb3\u3092\u53d7\u3051\u308b\u3053\u3068\u306e\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3092\u5f37\u304f\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\n<li>\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u3067IPv6\u30d5\u30e9\u30b0\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u7121\u52b9\u306b\u3059\u308b: <span class=\"lang:default decode:true crayon-inline \">netsh int ipv6 set global reassemblylimit=0<\/span><\/li>\n<li>IPv4\u306e\u30eb\u30fc\u30ba \u30bd\u30fc\u30b9 \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u7121\u52b9\u306b\u3059\u308b: <span class=\"lang:default decode:true crayon-inline \">netsh int ipv4 set global sourceroutingbehavior=drop<\/span><\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<ul>\n<li><strong>Revert system settings to your previous settings<\/strong>: \u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u9069\u7528\u6e08\u307f\u304b\u3069\u3046\u304b\u306b\u304b\u304b\u308f\u3089\u305a\u3001\u3059\u3079\u3066\u306eWindows\u30b7\u30b9\u30c6\u30e0\u8a2d\u5b9a\u3092\u3001\u56de\u907f\u7b56\u306e\u4e00\u74b0\u3068\u3057\u3066\u5909\u66f4\u304c\u884c\u308f\u308c\u308b\u524d\u306e\u5143\u306e\u5024\u306b\u623b\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<p><img  class=\"aligncenter wp-image-117065 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2021\/02\/word-image-52.png\" alt=\"Cortex XDR \u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306eUnpatched Vulnerabilities Protection\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u672c\u6587\u3067\u8aac\u660e\u3055\u308c\u3066\u3044\u308b\u3088\u3046\u306b\u3001CVE-2021-24074\u3001CVE 2021-24086\u3001\u304a\u3088\u3073CVE-2021-24094\u306e\u56de\u907f\u7b56\u8a2d\u5b9a\u3092\u5b9a\u7fa9\u3067\u304d\u307e\u3059\u3002 \" width=\"900\" height=\"311\" \/><\/p>\n<p><strong><em>\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u95a2\u3059\u308b\u6ce8\u610f: \u3059\u3079\u3066\u306eWindows\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306b\u3064\u3044\u3066\u3001\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u8106\u5f31\u6027\u3092\u4fee\u6b63\u3059\u308b\u6700\u65b0\u306eWindows Update\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3092\u5f37\u304f\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/em><\/strong><\/p>\n<p>\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001<a href=\"https:\/\/docs.paloaltonetworks.com\/cortex\/cortex-xdr\/cortex-xdr-prevent-admin\/endpoint-security\/endpoint-security-profiles\/add-exploit-security-profile.html\">Cortex XDR Prevent Administrator Guide \uff08Cortex XDR Prevent \u7ba1\u7406\u8005\u30ac\u30a4\u30c9\uff09<\/a>\u3092\u53c2\u7167\u3057\u307e\u3059\u3002<\/p>\n<h2><a id=\"post-117052-_68f9vh6ivu2v\"><\/a><strong>\u7d50\u8ad6<\/strong><\/h2>\n<p>\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306f\u3001Microsoft Active Protection Program \uff08MAPP\uff09\u306e\u30d1\u30fc\u30c8\u30ca\u30fc\u3067\u3042\u308b\u305f\u3081\u3001\u672c\u8106\u5f31\u6027\u306b\u95a2\u3059\u308b\u8a73\u7d30\u3092\u65e9\u671f\u306b\u53d7\u3051\u53d6\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u8105\u5a01\u306b\u3064\u3044\u3066\u3088\u308a\u6df1\u304f\u7406\u89e3\u3057\u3001\u305d\u3053\u304b\u3089\u5f97\u3089\u308c\u305f\u77e5\u898b\u3092\u88fd\u54c1\u306e\u4fdd\u8b77\u5f37\u5316\u306b\u6d3b\u304b\u3057\u3066\u3044\u307e\u3059\u3002\u304a\u5ba2\u69d8\u306b\u304a\u304b\u308c\u307e\u3057\u3066\u306f\u901a\u5e38\u901a\u308a\u3001\u304a\u4f7f\u3044\u306eMicrosoft\u88fd\u54c1\u306b\u306f\u5e38\u306b\u66f4\u65b0\u3092\u9069\u7528\u3057\u3066\u6700\u65b0\u306b\u4fdd\u3061\u3001\u672c\u8106\u5f31\u6027\u304b\u3089\u53d7\u3051\u308b\u5f71\u97ff\u3092\u7de9\u548c\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306f\u3001\u65b0\u3057\u3044\u60c5\u5831\u3084\u63a8\u5968\u4e8b\u9805\u304c\u5229\u7528\u53ef\u80fd\u306b\u306a\u308a\u6b21\u7b2c\u3001\u672c\u7a3f\u3092\u66f4\u65b0\u3057\u307e\u3059\u3002<\/p>\n<p><strong>\u8ffd\u52a0\u8cc7\u6599<\/strong><\/p>\n<p><a href=\"https:\/\/msrc.microsoft.com\/update-guide\/en-us\/vulnerability\/CVE-2021-24074\">Windows TCP\/IP Remote Code Execution Vulnerability, CVE-2021-24074<\/a><\/p>\n<p><a href=\"https:\/\/msrc.microsoft.com\/update-guide\/en-us\/vulnerability\/CVE-2021-24086\">Windows TCP\/IP Denial of Service Vulnerability, CVE-2021-24086<\/a><\/p>\n<p><a href=\"https:\/\/msrc.microsoft.com\/update-guide\/en-us\/vulnerability\/CVE-2021-24094\">Windows TCP\/IP Remote Code Execution Vulnerability, CVE-2021-24094<\/a><\/p>\n<p><a href=\"https:\/\/msrc.microsoft.com\/update-guide\/en-us\/releaseNote\/2021-Feb\">February 2021 Security Updates from Microsoft<\/a><\/p>\n<p><a href=\"https:\/\/docs.paloaltonetworks.com\/pan-os\/10-0\/pan-os-admin\/zone-protection-and-dos-protection\/zone-defense\/zone-protection-profiles\/packet-based-attack-protection.html\">Packet-Based Attack Protection\uff08\u30d1\u30b1\u30c3\u30c8 \u30d9\u30fc\u30b9\u306e\u653b\u6483\u4fdd\u8b77\uff09<\/a><\/p>\n<p><a href=\"https:\/\/docs.paloaltonetworks.com\/pan-os\/10-0\/pan-os-admin\/zone-protection-and-dos-protection\/configure-zone-protection-to-increase-network-security\/configure-packet-based-attack-protection.html\">Configure Packet Based Attack Protection\uff08\u30d1\u30b1\u30c3\u30c8 \u30d9\u30fc\u30b9\u306e\u653b\u6483\u4fdd\u8b77\u3092\u69cb\u6210\u3059\u308b\uff09<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981 Microsoft\u306f\u30012021\u5e742\u6708\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u300156\u4ef6\u306e\u516c\u958b\u6e08\u307f\u8106\u5f31\u6027\u306b\u5bfe\u3059\u308b\u30d1\u30c3\u30c1\u3092\u30ea\u30ea\u30fc\u30b9\u3057\u307e\u3057\u305f\u3002 CVE-2021-24086\u3001CVE-2021-24094: Windows\u306eIPv6\u30b9<\/p>\n","protected":false},"author":323,"featured_media":134410,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[4469,4432,4470],"tags":[6133,6135,6136,5547,4637],"product_categories":[4346,4442],"coauthors":[2629],"class_list":["post-117069","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vulnerabilities","category-top-cyberthreats-ja","category-vulnerabilities-ja","tag-cve-2021-24074-ja","tag-cve-2021-24086-ja","tag-cve-2021-24094","tag-microsoft-ja","tag-windows-ja","product_categories-advanced-threat-prevention","product_categories-advanced-threat-prevention-ja"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.0 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>\u8105\u5a01\u306b\u95a2\u3059\u308b\u60c5\u5831: Windows IPv4\u304a\u3088\u3073IPv6\u30b9\u30bf\u30c3\u30af\u306e\u8106\u5f31\u6027\uff08CVE-2021-24074 CVE-2021-24086 CVE-2021-24094\uff09<\/title>\n<meta name=\"description\" content=\"Windows IPv4\/IPv6 \u30b9\u30bf\u30c3\u30af\u306e\u8106\u5f31\u6027 CVE-2021-24086\u3001CVE-2021-24094\u3001CVE-2021-24074 \u306b\u3064\u3044\u3066\u306e\u6982\u8981\u3068\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u88fd\u54c1\u3067\u306e\u7de9\u548c\u7b56\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/unit42.paloaltonetworks.com\/ja\/cve-2021-24074-patch-tuesday\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u8105\u5a01\u306b\u95a2\u3059\u308b\u60c5\u5831: Windows IPv4\u304a\u3088\u3073IPv6\u30b9\u30bf\u30c3\u30af\u306e\u8106\u5f31\u6027\uff08CVE-2021-24074 CVE-2021-24086 CVE-2021-24094\uff09\" \/>\n<meta property=\"og:description\" content=\"Windows IPv4\/IPv6 \u30b9\u30bf\u30c3\u30af\u306e\u8106\u5f31\u6027 CVE-2021-24086\u3001CVE-2021-24094\u3001CVE-2021-24074 \u306b\u3064\u3044\u3066\u306e\u6982\u8981\u3068\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u88fd\u54c1\u3067\u306e\u7de9\u548c\u7b56\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/unit42.paloaltonetworks.com\/ja\/cve-2021-24074-patch-tuesday\/\" \/>\n<meta property=\"og:site_name\" content=\"Unit 42\" \/>\n<meta property=\"article:published_time\" content=\"2021-02-10T06:23:51+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-02-12T00:52:06+00:00\" \/>\n<meta property=\"og:image\" 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