{"id":92958,"date":"2018-10-09T01:00:56","date_gmt":"2018-10-09T08:00:56","guid":{"rendered":"https:\/\/www.paloaltonetworks.com\/blog\/?p=92958"},"modified":"2018-10-05T12:54:49","modified_gmt":"2018-10-05T19:54:49","slug":"%e8%84%85%e5%a8%81%e3%81%ab%e9%96%a2%e3%81%99%e3%82%8b%e3%83%80%e3%82%a4%e3%82%b8%e3%82%a7%e3%82%b9%e3%83%88-apache-struts%e3%81%ae%e9%87%8d%e5%a4%a7%e3%81%aa%e8%84%86%e5%bc%b1%e6%80%a7cve-2018-11776","status":"publish","type":"post","link":"https:\/\/origin-researchcenter.paloaltonetworks.com\/blog\/2018\/10\/%e8%84%85%e5%a8%81%e3%81%ab%e9%96%a2%e3%81%99%e3%82%8b%e3%83%80%e3%82%a4%e3%82%b8%e3%82%a7%e3%82%b9%e3%83%88-apache-struts%e3%81%ae%e9%87%8d%e5%a4%a7%e3%81%aa%e8%84%86%e5%bc%b1%e6%80%a7cve-2018-11776\/?lang=ja","title":{"rendered":"\u8105\u5a01\u306b\u95a2\u3059\u308b\u30c0\u30a4\u30b8\u30a7\u30b9\u30c8: Apache Struts\u306e\u91cd\u5927\u306a\u8106\u5f31\u6027CVE-2018-11776\u306b\u3064\u3044\u3066"},"content":{"rendered":"<p>\u72b6\u6cc1\u306e\u6982\u8981<\/p>\n<p>2018\u5e748\u670822\u65e5\u3001Apache Foundation\u306f\u3001Apache Struts\u30d0\u30fc\u30b8\u30e7\u30f32.3\uff5e2.3.34\u304a\u3088\u30732.5\uff5e2.5.16\u306b\u5f71\u97ff\u3092\u53ca\u307c\u3059\u30ea\u30e2\u30fc\u30c8 \u30b3\u30fc\u30c9\u5b9f\u884c\u306e\u8106\u5f31\u6027(<u><a href=\"https:\/\/cve.mitre.org\/cgi-bin\/cvename.cgi?name=CVE-2018-11776\" rel=\"nofollow,noopener\" >CVE-2018-1176<\/a><\/u>)\u306b\u5bfe\u3059\u308b\u91cd\u5927\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u3092<u><a href=\"https:\/\/cwiki.apache.org\/confluence\/display\/WW\/S2-057\" rel=\"nofollow,noopener\" >\u30ea\u30ea\u30fc\u30b9<\/a><\/u>\u3057\u307e\u3057\u305f\u3002Apache Foundation\u306f\u3059\u3079\u3066\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u3001\u3067\u304d\u308b\u9650\u308a\u65e9\u304f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u3092\u9069\u7528\u3059\u308b\u3088\u3046\u306b\u8981\u8acb\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u30d6\u30ed\u30b0\u306f\u3001\u7d44\u7e54\u304c\u8106\u5f31\u6027\u306e\u30ea\u30b9\u30af\u3092\u8a55\u4fa1\u3059\u308b\u306e\u306b\u5f79\u7acb\u3064\u60c5\u5831\u3092\u63d0\u4f9b\u3059\u308b\u3053\u3068\u3001\u304a\u3088\u3073\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u3092\u9069\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u307e\u3067\u306e\u9593\u3001\u30ea\u30b9\u30af\u306e\u8efd\u6e1b\u306b\u5f79\u7acb\u3064\u4fdd\u8b77\u304c\u5b9f\u65bd\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e\u304a\u5ba2\u69d8\u306b\u901a\u77e5\u3059\u308b\u3053\u3068\u3092\u76ee\u7684\u3068\u3057\u3066\u3044\u307e\u3059\u30022018\u5e748\u670824\u65e5\u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305f\u6700\u65b0\u306e\u8106\u5f31\u6027\u30b7\u30b0\u30cd\u30c1\u30e3\u3092\u5c0e\u5165\u3057\u3066\u3044\u308b\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e\u304a\u5ba2\u69d8\u306f\u3001\u4fdd\u8b77\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u8106\u5f31\u6027\u60c5\u5831<\/p>\n<p>Apache Foundation\u304a\u3088\u3073\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u7814\u7a76\u8005<u><a href=\"https:\/\/semmle.com\/news\/apache-struts-CVE-2018-11776#was-i-vulnerable\" rel=\"nofollow,noopener\" >Man Yue Mo<\/a><\/u>\u6c0f\u306e\u4e21\u8005\u306b\u3088\u308c\u3070\u3001\u3053\u306e\u8106\u5f31\u6027\u306f\u3001\u8106\u5f31\u6027\u306e\u3042\u308b\u30d0\u30fc\u30b8\u30e7\u30f3\u306eApache Struts\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u30b5\u30fc\u30d0\u3067\u306e\u30ea\u30e2\u30fc\u30c8 \u30b3\u30fc\u30c9\u5b9f\u884c\u3092\u6709\u52b9\u306b\u3067\u304d\u307e\u3059\u3002\u653b\u6483\u624b\u6bb5\u3068\u3057\u3066\u3001\u7279\u5225\u306b\u7d30\u5de5\u3057\u305fURL\u3092\u3001\u8106\u5f31\u6027\u306e\u3042\u308b\u30b7\u30b9\u30c6\u30e0\u306b\u9001\u4fe1\u3057\u307e\u3059\u3002\u307b\u3068\u3093\u3069\u306e\u5834\u5408\u3001\u3053\u308c\u306f\u3001\u8106\u5f31\u6027\u3092\u60aa\u7528\u3059\u308b\u306e\u306b\u8a8d\u8a3c\u304c\u5fc5\u8981\u306a\u3044\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n<p>\u6210\u529f\u3057\u305f\u653b\u6483\u306f\u3001Struts\u304c\u4f7f\u7528\u3057\u3066\u3044\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 \u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u3001\u3053\u308c\u304c\u5b9f\u969b\u306b\u30b7\u30b9\u30c6\u30e0\u5168\u4f53\u306e\u4fb5\u5bb3\u306b\u3064\u306a\u304c\u308b\u6050\u308c\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u305f\u3060\u3057\u3001\u3053\u306e\u8106\u5f31\u6027\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a\u3067\u306f\u60aa\u7528\u3067\u304d\u306a\u3044\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30b7\u30b9\u30c6\u30e0\u304c\u653b\u6483\u306b\u5bfe\u3057\u3066\u8106\u5f31\u306b\u306a\u308b\u306b\u306f\u3001\u6b21\u306e2\u3064\u306e\u6761\u4ef6\u304c\u6e80\u305f\u3055\u308c\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>Struts\u306e\u8a2d\u5b9a\u3067\u3001<a href=\"https:\/\/stackoverflow.com\/questions\/17690956\/how-to-prevent-the-wildcard-namespace-in-struts#17697478\" rel=\"nofollow,noopener\" >alwaysSelectFullNamespace<\/a>\u30d5\u30e9\u30b0\u304c\u300ctrue\u300d\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3002(\u6ce8:\u00a0 \u6709\u540d\u306a<u><a href=\"https:\/\/struts.apache.org\/plugins\/convention\/\" rel=\"nofollow,noopener\" >Struts Convention\u30d7\u30e9\u30b0\u30a4\u30f3<\/a><\/u>\u3092\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u3053\u306e\u30d5\u30e9\u30b0\u306f\u30d7\u30e9\u30b0\u30a4\u30f3\u306b\u3088\u3063\u3066\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u300ctrue\u300d\u306b\u8a2d\u5b9a\u3055\u308c\u307e\u3059)\u3002<\/li>\n<li>Struts\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u3001\u540d\u524d\u7a7a\u9593\u3092\u6307\u5b9a\u305b\u305a\u306b\u8a2d\u5b9a\u3055\u308c\u305f\u3001\u307e\u305f\u306f\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u540d\u524d\u7a7a\u9593\u3092\u4f7f\u7528\u3057\u3066\u8a2d\u5b9a\u3055\u308c\u305f\u300c\u30a2\u30af\u30b7\u30e7\u30f3\u300d\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u3002\u3053\u306e\u6761\u4ef6\u306f\u3001Struts\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3067\u6307\u5b9a\u3055\u308c\u308b\u30a2\u30af\u30b7\u30e7\u30f3\u3068\u540d\u524d\u7a7a\u9593\u306b\u9069\u7528\u3055\u308c\u307e\u3059\u3002\u6ce8: \u6709\u540d\u306aStruts Convention\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u3053\u306e\u6761\u4ef6\u306fJava\u30b3\u30fc\u30c9\u3067\u6307\u5b9a\u3055\u308c\u308b\u30a2\u30af\u30b7\u30e7\u30f3\u3068\u540d\u524d\u7a7a\u9593\u306b\u3082\u9069\u7528\u3055\u308c\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>Struts\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u4e0a\u8a18\u306e\u4e21\u65b9\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u3067\u3082\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u8106\u5f31\u3067\u3042\u308b\u53ef\u80fd\u6027\u306f\u3042\u308a\u307e\u3059\u304c\u3001(\u73fe\u6642\u70b9\u3067\u306f) CVE-2018-11776\u3092\u60aa\u7528\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<p>\u7279\u306b\u3001\u6709\u540d\u306aStruts Convention\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u3053\u306e\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u4f7f\u7528\u3057\u306a\u3044\u4ed6\u306eStruts\u5b9f\u88c5\u306b\u6bd4\u3079\u3066\u3001\u60aa\u7528\u306e\u5371\u967a\u6027\u306f\u6f5c\u5728\u7684\u306b\u9ad8\u304f\u306a\u308b\u3068\u601d\u308f\u308c\u307e\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u8105\u5a01\u74b0\u5883\u60c5\u5831<\/p>\n<p>\u3053\u306e\u8106\u5f31\u6027\u306f\u3001\u305d\u308c\u306b\u5bfe\u51e6\u3059\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u3068\u3068\u3082\u306b\u30018\u670822\u65e5\u306b\u516c\u958b\u3055\u308c\u307e\u3057\u305f\u3002\u73fe\u5728\u5224\u660e\u3057\u3066\u3044\u308b\u7bc4\u56f2\u3067\u3001\u8106\u5f31\u6027\u306b\u95a2\u3059\u308b\u8a73\u7d30\u60c5\u5831\u3068\u60aa\u7528\u306e\u65b9\u6cd5\u304c\u8a18\u8f09\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u3059\u3067\u306b\u6982\u5ff5\u5b9f\u8a3c(PoC)\u30b3\u30fc\u30c9\u304c\u516c\u958b\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u524d\u8ff0\u3057\u305f\u3088\u3046\u306b\u3001\u3053\u306ePoC\u306f\u3001\u8106\u5f31\u6027\u304c\u3042\u308a\u3001\u60aa\u7528\u3059\u308b\u305f\u3081\u306e\u4e21\u65b9\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u30b7\u30b9\u30c6\u30e0\u306b\u5bfe\u3057\u3066\u306e\u307f\u6709\u52b9\u3067\u3059\u3002<\/p>\n<p>\u524d\u56de\u306eStruts\u306e\u91cd\u5927\u306a\u8106\u5f31\u6027\u306f\u3001\u6628\u5e74\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u3068\u8106\u5f31\u6027\u60c5\u5831\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305f\u308f\u305a\u304b3\u65e5\u5f8c\u306b\u306f\u6d3b\u767a\u306b\u653b\u6483\u3055\u308c\u305f\u3053\u3068\u304c\u5831\u544a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u73fe\u6642\u70b9\u3067\u306f\u3001\u6d3b\u767a\u306a\u653b\u6483\u306b\u3064\u3044\u3066\u5831\u544a\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u8106\u5f31\u6027\u304c\u60aa\u7528\u53ef\u80fd\u306b\u306a\u308b\u305f\u3081\u306b2\u3064\u306e\u975e\u30c7\u30d5\u30a9\u30eb\u30c8\u6761\u4ef6\u304c\u6e80\u305f\u3055\u308c\u308b\u5fc5\u8981\u304c\u3042\u308b\u3068\u3044\u3046\u73fe\u5728\u306e\u8981\u4ef6\u304c\u3001\u4ed6\u3068\u306f\u7570\u306a\u308b\u8105\u5a01\u74b0\u5883\u3092\u751f\u307f\u51fa\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u305f\u3060\u3057\u3001\u6709\u52b9\u306aPoC\u304c\u5b58\u5728\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u5f53\u9762\u306f\u3053\u306e\u8106\u5f31\u6027\u304c\u6d3b\u767a\u306b\u60aa\u7528\u3055\u308c\u308b\u3053\u3068\u304c\u306a\u3044\u3068\u3057\u3066\u3082\u3001\u6700\u4f4e\u9650\u306e\u30d7\u30ed\u30fc\u30d6\u304c\u3042\u308b\u3053\u3068\u306f\u4e88\u60f3\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u7d44\u7e54\u306f\u3001\u6b21\u306e4\u70b9\u306b\u91cd\u70b9\u3092\u7f6e\u3044\u3066\u3001\u30d1\u30c3\u30c1\u3092\u9069\u7528\u3067\u304d\u308b\u307e\u3067\u306e\u9593\u306e\u653b\u6483\u306e\u53ef\u80fd\u6027\u306b\u5bfe\u3059\u308b\u30ea\u30b9\u30af\u8a55\u4fa1\u3092\u5b9f\u884c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>Struts Convention\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u304b?<\/li>\n<li>\u60aa\u7528\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u6761\u4ef6\u3092\u4e21\u65b9\u3068\u3082\u6e80\u305f\u3057\u3066\u3044\u308b\u304b?<\/li>\n<li>\u73fe\u5728\u306ePoC\u3092\u4f7f\u7528\u3057\u305f\u6b66\u5668\u5316\u307e\u305f\u306f\u653b\u6483\u306e\u5146\u5019\u306f\u3042\u308b\u304b?<\/li>\n<li>\u60aa\u7528\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a2\u3064\u306e\u6761\u4ef6\u304c\u7121\u610f\u5473\u306b\u306a\u308b\u3001\u65b0\u3057\u3044PoC\u307e\u305f\u306f\u653b\u6483\u304c\u958b\u767a\u3055\u308c\u3066\u3044\u308b\u304b?<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e\u304a\u5ba2\u69d8\u3078\u306e\u30ac\u30a4\u30c0\u30f3\u30b9\u3068\u4fdd\u8b77<\/p>\n<p>\u8106\u5f31\u6027\u306e\u3042\u308bApache Struts\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u5168\u7d44\u7e54\u304c\u3001\u3067\u304d\u308b\u9650\u308a\u65e9\u304f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u3092\u5c0e\u5165\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u7d44\u7e54\u306f\u3001\u305d\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 \u30dd\u30ea\u30b7\u30fc\u3068\u30ea\u30b9\u30af\u8a55\u4fa1\u3001\u304a\u3088\u3073\u73fe\u5728\u5165\u624b\u53ef\u80fd\u306a\u60c5\u5831\u306b\u57fa\u3065\u3044\u3066\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u306e\u30b9\u30b1\u30b8\u30e5\u30fc\u30ea\u30f3\u30b0\u3068\u5c0e\u5165\u306e\u512a\u5148\u9806\u4f4d\u3092\u4ed8\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u307e\u305f\u305d\u3046\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>2018\u5e748\u670824\u65e5\u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305f\u30b3\u30f3\u30c6\u30f3\u30c4 \u30ea\u30ea\u30fc\u30b9 \u30d0\u30fc\u30b8\u30e7\u30f38057 (ID 33948\u3001\u540d\u524d: Apache Struts 2 Remote Code Execution Vulnerability\u3092\u542b\u3080)\u306e\u8106\u5f31\u6027\u30b7\u30b0\u30cd\u30c1\u30e3\u3092\u5c0e\u5165\u6e08\u307f\u306e\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e\u304a\u5ba2\u69d8\u306f\u3001\u305d\u306e\u8106\u5f31\u6027\u306b\u5bfe\u3057\u3066\u73fe\u5728\u77e5\u3089\u308c\u3066\u3044\u308b\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u304b\u3089\u4fdd\u8b77\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u304a\u5ba2\u69d8\u306f\u3001\u4e0a\u8a18\u3067\u63a8\u5968\u3055\u308c\u3066\u3044\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u3092\u5c0e\u5165\u3059\u3079\u304d\u3067\u3059\u304c\u3001\u3001\u5373\u5ea7\u306b\u4fdd\u8b77\u3092\u5f37\u5316\u3059\u308b\u305f\u3081\u306b\u6700\u65b0\u306e\u8106\u5f31\u6027\u30b7\u30b0\u30cd\u30c1\u30e3\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u307e\u305f\u305d\u3046\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u304a\u5ba2\u69d8\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u304a\u3088\u3073\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u306e\u5c0e\u5165\u306b\u95a2\u3059\u308b\u610f\u601d\u6c7a\u5b9a\u306e\u969b\u3001\u304a\u3088\u3073\u8106\u5f31\u6027\u3068\u8105\u5a01\u306e\u74b0\u5883\u306e\u30ea\u30b9\u30af\u8a55\u4fa1\u306e\u969b\u3001\u3053\u306e\u4f7f\u7528\u53ef\u80fd\u306a\u4fdd\u8b77\u306e\u5f37\u5316\u3092\u305d\u306e\u4e00\u90e8\u3068\u3057\u3066\u8003\u616e\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u307e\u305f\u305d\u3046\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3044\u3064\u3082\u3068\u540c\u69d8\u306b\u3001\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306f\u72b6\u6cc1\u3092\u6ce8\u610f\u6df1\u304f\u76e3\u8996\u3057\u3066\u304a\u308a\u3001\u65b0\u305f\u306a\u8a73\u7d30\u304c\u5206\u304b\u308a\u6b21\u7b2c\u3001\u304a\u5ba2\u69d8\u306b\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u72b6\u6cc1\u306e\u6982\u8981 2018\u5e748\u670822\u65e5\u3001Apache Foundation\u306f\u3001Apache Struts\u30d0\u30fc\u30b8\u30e7\u30f32.3\uff5e2.3.34\u304a\u3088\u30732.5\uff5e2.5.16\u306b\u5f71\u97ff\u3092\u53ca\u307c\u3059\u30ea\u30e2\u30fc\u30c8 \u30b3\u30fc\u30c9\u5b9f\u884c\u306e\u8106\u5f31\u6027(CVE-2018-1176)\u306b\u5bfe\u3059\u308b\u91cd\u5927\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u3092\u30ea\u30ea\u30fc\u30b9\u3057\u307e\u3057\u305f\u3002Apache Foundation\u306f\u3059\u3079\u3066\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u3001\u3067\u304d\u308b\u9650\u308a\u65e9\u304f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u3092\u9069\u7528\u3059\u308b\u3088\u3046\u306b\u8981\u8acb\u3057\u3066\u3044\u307e\u3059\u3002 \u3053\u306e\u30d6\u30ed\u30b0\u306f\u3001\u7d44\u7e54\u304c\u8106\u5f31\u6027\u306e\u30ea\u30b9\u30af\u3092\u8a55\u4fa1\u3059\u308b\u306e\u306b\u5f79\u7acb\u3064\u60c5\u5831\u3092\u63d0\u4f9b\u3059\u308b\u3053\u3068\u3001\u304a\u3088\u3073\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u3092\u9069\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u307e\u3067\u306e\u9593\u3001\u30ea\u30b9\u30af\u306e\u8efd\u6e1b\u306b\u5f79\u7acb\u3064\u4fdd\u8b77\u304c\u5b9f\u65bd\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e\u304a\u5ba2\u69d8\u306b\u901a\u77e5\u3059\u308b\u3053\u3068\u3092\u76ee\u7684\u3068\u3057\u3066\u3044\u307e\u3059\u30022018\u5e748\u670824\u65e5\u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305f\u6700\u65b0\u306e\u8106\u5f31\u6027\u30b7\u30b0\u30cd\u30c1\u30e3\u3092\u5c0e\u5165\u3057\u3066\u3044\u308b\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e\u304a\u5ba2\u69d8\u306f\u3001\u4fdd\u8b77\u3055\u308c\u3066\u3044\u307e\u3059\u3002 &nbsp; \u8106\u5f31\u6027\u60c5\u5831 Apache Foundation\u304a\u3088\u3073\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u7814\u7a76\u8005Man Yue Mo\u6c0f\u306e\u4e21\u8005\u306b\u3088\u308c\u3070\u3001\u3053\u306e\u8106\u5f31\u6027\u306f\u3001\u8106\u5f31\u6027\u306e\u3042\u308b\u30d0\u30fc\u30b8\u30e7\u30f3\u306eApache Struts\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u30b5\u30fc\u30d0\u3067\u306e\u30ea\u30e2\u30fc\u30c8 \u30b3\u30fc\u30c9\u5b9f\u884c\u3092\u6709\u52b9\u306b\u3067\u304d\u307e\u3059\u3002\u653b\u6483\u624b\u6bb5\u3068\u3057\u3066\u3001\u7279\u5225\u306b\u7d30\u5de5\u3057\u305fURL\u3092\u3001\u8106\u5f31\u6027\u306e\u3042\u308b\u30b7\u30b9\u30c6\u30e0\u306b\u9001\u4fe1\u3057\u307e\u3059\u3002\u307b\u3068\u3093\u3069\u306e\u5834\u5408\u3001\u3053\u308c\u306f\u3001\u8106\u5f31\u6027\u3092\u60aa\u7528\u3059\u308b\u306e\u306b\u8a8d\u8a3c\u304c\u5fc5\u8981\u306a\u3044\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002 \u6210\u529f\u3057\u305f\u653b\u6483\u306f\u3001Struts\u304c\u4f7f\u7528\u3057\u3066\u3044\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 \u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u3001\u3053\u308c\u304c\u5b9f\u969b\u306b\u30b7\u30b9\u30c6\u30e0\u5168\u4f53\u306e\u4fb5\u5bb3\u306b\u3064\u306a\u304c\u308b\u6050\u308c\u304c\u3042\u308a\u307e\u3059\u3002 \u305f\u3060\u3057\u3001\u3053\u306e\u8106\u5f31\u6027\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a\u3067\u306f\u60aa\u7528\u3067\u304d\u306a\u3044\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30b7\u30b9\u30c6\u30e0\u304c\u653b\u6483\u306b\u5bfe\u3057\u3066\u8106\u5f31\u306b\u306a\u308b\u306b\u306f\u3001\u6b21\u306e2\u3064\u306e\u6761\u4ef6\u304c\u6e80\u305f\u3055\u308c\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 Struts\u306e\u8a2d\u5b9a\u3067\u3001alwaysSelectFullNamespace\u30d5\u30e9\u30b0\u304c\u300ctrue\u300d\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3002(\u6ce8:\u00a0 \u6709\u540d\u306aStruts Convention\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u3053\u306e\u30d5\u30e9\u30b0\u306f\u30d7\u30e9\u30b0\u30a4\u30f3\u306b\u3088\u3063\u3066\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u300ctrue\u300d\u306b\u8a2d\u5b9a\u3055\u308c\u307e\u3059)\u3002 Struts\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u3001\u540d\u524d\u7a7a\u9593\u3092\u6307\u5b9a\u305b\u305a\u306b\u8a2d\u5b9a\u3055\u308c\u305f\u3001\u307e\u305f\u306f\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u540d\u524d\u7a7a\u9593\u3092\u4f7f\u7528\u3057\u3066\u8a2d\u5b9a\u3055\u308c\u305f\u300c\u30a2\u30af\u30b7\u30e7\u30f3\u300d\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u3002\u3053\u306e\u6761\u4ef6\u306f\u3001Struts\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3067\u6307\u5b9a\u3055\u308c\u308b\u30a2\u30af\u30b7\u30e7\u30f3\u3068\u540d\u524d\u7a7a\u9593\u306b\u9069\u7528\u3055\u308c\u307e\u3059\u3002\u6ce8: \u6709\u540d\u306aStruts Convention\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u3053\u306e\u6761\u4ef6\u306fJava\u30b3\u30fc\u30c9\u3067\u6307\u5b9a\u3055\u308c\u308b\u30a2\u30af\u30b7\u30e7\u30f3\u3068\u540d\u524d\u7a7a\u9593\u306b\u3082\u9069\u7528\u3055\u308c\u307e\u3059\u3002 Struts\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u4e0a\u8a18\u306e\u4e21\u65b9\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u3067\u3082\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u8106\u5f31\u3067\u3042\u308b\u53ef\u80fd\u6027\u306f\u3042\u308a\u307e\u3059\u304c\u3001(\u73fe\u6642\u70b9\u3067\u306f) CVE-2018-11776\u3092\u60aa\u7528\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002 \u7279\u306b\u3001\u6709\u540d\u306aStruts Convention\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u3053\u306e\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u4f7f\u7528\u3057\u306a\u3044\u4ed6\u306eStruts\u5b9f\u88c5\u306b\u6bd4\u3079\u3066\u3001\u60aa\u7528\u306e\u5371\u967a\u6027\u306f\u6f5c\u5728\u7684\u306b\u9ad8\u304f\u306a\u308b\u3068\u601d\u308f\u308c\u307e\u3059\u3002 &nbsp; \u8105\u5a01\u74b0\u5883\u60c5\u5831 \u3053\u306e\u8106\u5f31\u6027\u306f\u3001\u305d\u308c\u306b\u5bfe\u51e6\u3059\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u3068\u3068\u3082\u306b\u30018\u670822\u65e5\u306b\u516c\u958b\u3055\u308c\u307e\u3057\u305f\u3002\u73fe\u5728\u5224\u660e\u3057\u3066\u3044\u308b\u7bc4\u56f2\u3067\u3001\u8106\u5f31\u6027\u306b\u95a2\u3059\u308b\u8a73\u7d30\u60c5\u5831\u3068\u60aa\u7528\u306e\u65b9\u6cd5\u304c\u8a18\u8f09\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u3059\u3067\u306b\u6982\u5ff5\u5b9f\u8a3c(PoC)\u30b3\u30fc\u30c9\u304c\u516c\u958b\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u524d\u8ff0\u3057\u305f\u3088\u3046\u306b\u3001\u3053\u306ePoC\u306f\u3001\u8106\u5f31\u6027\u304c\u3042\u308a\u3001\u60aa\u7528\u3059\u308b\u305f\u3081\u306e\u4e21\u65b9\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u30b7\u30b9\u30c6\u30e0\u306b\u5bfe\u3057\u3066\u306e\u307f\u6709\u52b9\u3067\u3059\u3002 \u524d\u56de\u306eStruts\u306e\u91cd\u5927\u306a\u8106\u5f31\u6027\u306f\u3001\u6628\u5e74\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u3068\u8106\u5f31\u6027\u60c5\u5831\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305f\u308f\u305a\u304b3\u65e5\u5f8c\u306b\u306f\u6d3b\u767a\u306b\u653b\u6483\u3055\u308c\u305f\u3053\u3068\u304c\u5831\u544a\u3055\u308c\u3066\u3044\u307e\u3059\u3002 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