{"id":103184,"date":"2020-01-16T18:19:37","date_gmt":"2020-01-17T02:19:37","guid":{"rendered":"https:\/\/unit42.paloaltonetworks.com\/?p=103184"},"modified":"2020-01-16T18:20:08","modified_gmt":"2020-01-17T02:20:08","slug":"exploits-in-the-wild-for-citrix-adc-and-citrix-gateway-directory-traversal-vulnerability-cve-2019-19781","status":"publish","type":"post","link":"https:\/\/unit42.paloaltonetworks.com\/ja\/exploits-in-the-wild-for-citrix-adc-and-citrix-gateway-directory-traversal-vulnerability-cve-2019-19781\/","title":{"rendered":"Citrix ADC\u3068Citrix Gateway\u306b\u304a\u3051\u308b\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\u8106\u5f31\u6027(CVE-2019-19781)\u306e\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u72b6\u6cc1"},"content":{"rendered":"<h2>\u6982\u8981<\/h2>\n<p>\u6628\u5e74\u672b\u3001Citrix Application Delivery Controller\uff08ADC\uff09\u304a\u3088\u3073Citrix Gateway\u306b\u8106\u5f31\u6027\u304c\u78ba\u8a8d\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u306e\u8106\u5f31\u6027\u3092\u60aa\u7528\u3057\u305f\u30ea\u30e2\u30fc\u30c8\u306e\u653b\u6483\u8005\u306f\u3001\u5bb9\u6613\u306b\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\u3057\u3001\u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u306a\u3057\u3067\u30b7\u30b9\u30c6\u30e0\u69cb\u6210\u30d5\u30a1\u30a4\u30eb\u304b\u3089\u6a5f\u5bc6\u60c5\u5831\u3092\u8aad\u307f\u53d6\u308a\u3001\u4efb\u610f\u306e\u30b3\u30fc\u30c9\u3092\u30ea\u30e2\u30fc\u30c8\u304b\u3089\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002<a href=\"https:\/\/support.citrix.com\/article\/CTX267027\">\u3053\u306e\u8106\u5f31\u6027\u306f\u3001\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u3059\u3079\u3066\u306e\u88fd\u54c1\u30d0\u30fc\u30b8\u30e7\u30f3\u3068\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u3059\u3079\u3066\u306e\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306b\u5f71\u97ff\u3057\u307e\u3059\u3002<\/a><\/p>\n<ul>\n<li>Citrix ADC\u304a\u3088\u3073Citrix Gateway\u30d0\u30fc\u30b8\u30e7\u30f313.0\u306e\u3059\u3079\u3066\u306e\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u30d3\u30eb\u30c9<\/li>\n<li>Citrix ADC\u304a\u3088\u3073NetScaler Gateway\u30d0\u30fc\u30b8\u30e7\u30f312.1\u306e\u3059\u3079\u3066\u306e\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u30d3\u30eb\u30c9<\/li>\n<li>Citrix ADC\u304a\u3088\u3073NetScaler Gateway\u30d0\u30fc\u30b8\u30e7\u30f312.0\u306e\u3059\u3079\u3066\u306e\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u30d3\u30eb\u30c9<\/li>\n<li>Citrix ADC\u304a\u3088\u3073NetScaler Gateway\u30d0\u30fc\u30b8\u30e7\u30f311.1\u306e\u3059\u3079\u3066\u306e\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u30d3\u30eb\u30c9<\/li>\n<li>Citrix NetScaler ADC\u304a\u3088\u3073NetScaler Gateway\u30d0\u30fc\u30b8\u30e7\u30f310.5\u306e\u3059\u3079\u3066\u306e\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u30d3\u30eb\u30c9<\/li>\n<\/ul>\n<p>\u3053\u306e\u8106\u5f31\u6027\u306fCVE\u756a\u53f7CVE-2019-19781\u3067\u8ffd\u8de1\u3055\u308c\u3066\u304a\u308a\u3001CVSS v3.1\u30d9\u30fc\u30b9\u30b9\u30b3\u30a2\u306f9.8\u306e\u300cCritical (\u7dca\u6025)\u300d\u3067\u3059\u3002Unit 42\u306e\u30ea\u30b5\u30fc\u30c1\u30e3\u30fc\u306f\u3001\u672c\u8106\u5f31\u6027\u3092\u60aa\u7528\u3059\u308b\u30b9\u30ad\u30e3\u30f3\u6d3b\u52d5\u3092\u767a\u898b\u3057\u307e\u3057\u305f\u3002\u307e\u305f\u3001\u672c\u8106\u5f31\u6027\u304c1\u670810\u65e5\u306b\u6700\u521d\u306b\u958b\u793a\u3055\u308c\u3066\u4ee5\u964d\u3001\u8ffd\u52a0\u306eIoC(\u4fb5\u5bb3\u306e\u6307\u6a19)\u3092\u7279\u5b9a\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>\u672c\u7a3f\u3067\u306f\u3001\u8106\u5f31\u6027\u306e\u6839\u672c\u539f\u56e0\u5206\u6790\u3001\u6982\u5ff5\u5b9f\u8a3c\u4f8b(PoC)\u3001\u304a\u3088\u3073\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u3067\u89b3\u6e2c\u3055\u308c\u305f\u653b\u6483\u6d3b\u52d5\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n<h3><a id=\"post-103184-root-cause-analysis-of-the-vulnerability\"><\/a>\u8106\u5f31\u6027\u306e\u6839\u672c\u8981\u56e0\u5206\u6790<\/h3>\n<p>\u3053\u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\u8106\u5f31\u6027\u306e\u539f\u56e0\u306f\u3001\u30d1\u30b9\u540d\u306e\u51e6\u7406\u304c\u9069\u5207\u306b\u884c\u308f\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u306b\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30b7\u30b9\u30c6\u30e0\u306b\u306f\u30c7\u30fc\u30bf\u306e\u30b5\u30cb\u30c6\u30a3\u30c1\u30a7\u30c3\u30af\u304c\u306a\u304f\u3001\u4e0e\u3048\u3089\u308c\u305f\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u30d1\u30b9\u3092\u305d\u306e\u307e\u307e\u5229\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u8106\u5f31\u306a\u30b7\u30b9\u30c6\u30e0\u304c \/vpn\/..\/vpns\/services.html \u306e\u3088\u3046\u306a\u30d1\u30b9\u3092\u542b\u3080\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u53d7\u4fe1\u3057\u305f\u3068\u304d\u3001Citrix \u88fd\u54c1\u3067\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b Apache \u30b5\u30fc\u30d0\u30fc\u306f\u3053\u306e\u30d1\u30b9\u3092 \/vpn\/..\/vpns\/ \u304b\u3089\u5358\u7d14\u306b \/vpns\/ \u306b\u5909\u63db\u3057\u3066\u3044\u307e\u3059\u3002Apache \u30b7\u30b9\u30c6\u30e0\u306e\u672c\u8106\u5f31\u6027\u306b\u3088\u308a\u3001\u30ea\u30e2\u30fc\u30c8\u306b\u3044\u308b\u653b\u6483\u8005\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u306a\u3057\u3067\u3001\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u3057\u3001\u6a5f\u5bc6\u30d5\u30a1\u30a4\u30eb\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u307b\u304b\u3001\u3055\u3089\u306b\u6df1\u523b\u306a\u30b1\u30fc\u30b9\u3082\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u3082\u30b5\u30cb\u30c6\u30a3\u30c1\u30a7\u30c3\u30af\u3082\u306a\u3057\u306b\u30e6\u30fc\u30b6\u30fc\u306e\u5165\u529b\u306b\u9069\u7528\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u653b\u6483\u8005\u306f\u3001POST\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u4f7f\u7528\u3057\u3001\u7d30\u5de5\u6e08\u307f\u306eXML\u30d5\u30a1\u30a4\u30eb\u3092\u8106\u5f31\u306a\u30b5\u30fc\u30d0\u30fc\u4e0a\u306b\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<a href=\"https:\/\/twitter.com\/mpgn_x64\/status\/1215643010630930433\">\u305d\u306e\u5f8c\u3001\u653b\u6483\u8005\u304c\u4f5c\u6210\u6e08\u307f\u30d5\u30a1\u30a4\u30eb\u3092\u6c42\u3081\u308b\u5225\u306eHTTP\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u884c\u3046\u3068\u3001XML\u30d5\u30a1\u30a4\u30eb\u5185\u306e\u60aa\u610f\u306e\u3042\u308b\u30b3\u30fc\u30c9\u304c\u5b9f\u884c\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/a><\/p>\n<h3><a id=\"post-103184-proof-of-concept\"><\/a>PoC<\/h3>\n<p>\u79c1\u305f\u3061\u306f\u691c\u8a3c\u74b0\u5883\u3067\u4ee5\u4e0b\u306e\u3088\u3046\u306aPoC\u3092\u4f5c\u6210\u3057\u3001\u3053\u308c\u3089\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\u30ea\u30af\u30a8\u30b9\u30c8\u304b\u3089\u5f97\u305f\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u89b3\u5bdf\u3057\u307e\u3057\u305f\u3002\u672cPoC\u306f\u3001\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\u3092\u542b\u3080\u30ea\u30af\u30a8\u30b9\u30c8\u304c\u3001\u8106\u5f31\u306a\u30b7\u30b9\u30c6\u30e0\u306b\u3088\u308a\u6b63\u5e38\u306b\u51e6\u7406\u3055\u308c\u305f\u69d8\u5b50\u3092\u660e\u78ba\u306b\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u4e2d\u306b\u306f\u6a5f\u5bc6\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u63d0\u4f9b\u3059\u308b\u3082\u306e\u3082\u3042\u308a\u3001\u3053\u308c\u306f\u60c5\u5831\u6f0f\u3048\u3044\u3084\u30ea\u30e2\u30fc\u30c8\u30b3\u30fc\u30c9\u5b9f\u884c\u306b\u3082\u3064\u306a\u304c\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>GET \/vpn\/..\/vpns\/services.html HTTP\/1.1<\/li>\n<\/ul>\n<p><a href=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/Figure-1.-Successful-response-with-PoC-request.jpeg\" rel=\"wpdevart_lightbox\"><img width=\"1024\" height=\"344\"  class=\"wp-image-103187 aligncenter lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-6.jpeg\" srcset=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-6.jpeg 1024w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-6-300x101.jpeg 300w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-6-768x258.jpeg 768w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-6-900x302.jpeg 900w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-6-370x124.jpeg 370w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p style=\"text-align: center;\"><span style=\"font-size: 10pt;\"><em>\u56f31 PoC\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u5bfe\u3057\u6b63\u5e38\u30ec\u30b9\u30dd\u30f3\u30b9\u304c\u8fd4\u3055\u308c\u3066\u3044\u308b<\/em><\/span><\/p>\n<ul>\n<li>GET \/vpn\/..\/vpns\/cfg\/smb.conf HTTP\/1.1<\/li>\n<\/ul>\n<p style=\"text-align: center;\"><a href=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/Figure-2.-Successfully-access-smb.conf-file-with-PoC-request.jpeg\" rel=\"wpdevart_lightbox\"><img width=\"1024\" height=\"448\"  class=\"wp-image-103189 aligncenter lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-7.jpeg\" srcset=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-7.jpeg 1024w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-7-300x131.jpeg 300w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-7-768x336.jpeg 768w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-7-900x394.jpeg 900w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-7-370x162.jpeg 370w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><span style=\"font-size: 10pt;\"><em>\u56f32 PoC\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u3088\u308asmb.conf\u30d5\u30a1\u30a4\u30eb\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b<\/em><\/span><\/p>\n<ul>\n<li>GET \/vpn\/..\/vpns\/portal\/scripts\/newbm.pl HTTP\/1.1<\/li>\n<li>GET \/vpn\/..\/vpns\/portal\/scripts\/rmbm.pl HTTP\/1.1<\/li>\n<\/ul>\n<h3><a id=\"post-103184-exploits-in-the-wild\"><\/a>\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u3067\u89b3\u6e2c\u3055\u308c\u305f\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u72b6\u6cc1<\/h3>\n<p>\u3053\u3053\u3067\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u306b\u516c\u958b\u3055\u308c\u3066\u3044\u308b\u8106\u5f31\u306a\u30b7\u30b9\u30c6\u30e0\u304c\u3069\u306e\u3088\u3046\u306a\u3082\u306e\u304b\u3092\u3056\u3063\u3068\u773a\u3081\u3066\u307f\u307e\u3057\u305f\u3002\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u63a5\u7d9a\u3055\u308c\u305f\u30c7\u30d0\u30a4\u30b9\u3092\u691c\u7d22\u3059\u308b\u30b5\u30a4\u30c8Shodan\u3067Citrix ADC\u3092\u5bfe\u8c61\u306b\u5358\u7d14\u306a\u691c\u7d22\u3092\u304b\u3051\u305f\u7d50\u679c\u3001\u8106\u5f31\u306aCitrix\u88fd\u54c1\u306b\u95a2\u3059\u308b\u7d04700\u4ef6\u306e\u7d50\u679c\u304c\u5f97\u3089\u308c\u307e\u3057\u305f\u3002\u305f\u3060\u3057\u3001\u3088\u308a\u8a73\u7d30\u306a\u6761\u4ef6\u3067\u691c\u7d22\u3059\u308c\u3070\u3001\u3053\u306e\u6570\u306f\u3050\u3093\u3068\u5897\u3048\u308b\u3082\u306e\u3068\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/Figure-3.-Vulnerable-Citrix-hosts-list-from-Shodan-1.jpeg\" rel=\"wpdevart_lightbox\"><img width=\"1811\" height=\"906\"  class=\"wp-image-103191 aligncenter lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-8.jpeg\" srcset=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-8.jpeg 1811w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-8-300x150.jpeg 300w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-8-1024x512.jpeg 1024w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-8-768x384.jpeg 768w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-8-1536x768.jpeg 1536w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-8-900x450.jpeg 900w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-8-370x185.jpeg 370w\" sizes=\"(max-width: 1811px) 100vw, 1811px\" \/><\/a><span style=\"font-size: 10pt;\"><em>\u56f33 Shodan\u691c\u7d22\u3067\u5f97\u3089\u308c\u305f\u8106\u5f31\u306aCitrix\u30db\u30b9\u30c8\u306e\u4e00\u89a7<\/em><\/span><\/p>\n<p>\u79c1\u305f\u3061\u306f\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\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3092\u901a\u3058\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u3067\u898b\u3089\u308c\u308b\u3053\u306e\u8106\u5f31\u6027\u3092\u60aa\u7528\u3059\u308b\u8907\u6570\u306e\u8a66\u307f\u3092\u6355\u6349\u3057\u307e\u3057\u305f\u3002\u56f35\u306b\u793a\u3057\u305f\u3088\u3046\u306b\u3001\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u3088\u308a\u3001\u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u306a\u3057\u3067smb.conf\u304c\u516c\u958b\u306a\u3044\u3057\u53d6\u5f97\u304c\u3055\u308c\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305f\u56f36\u306b\u793a\u3059\u3088\u3046\u306b\u3001NSC_USER\u306f\u3001HTTP\u30d8\u30c3\u30c0\u5185\u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u306b\u304a\u3051\u308b\u9375\u3068\u306a\u308b\u3082\u306e\u3067\u3001\u3053\u308c\u3092\u4f7f\u3046\u3053\u3068\u3067\u30ea\u30e2\u30fc\u30c8\u3067\u30b3\u30fc\u30c9\u304c\u5b9f\u884c\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/Figure-4.-Attack-activity-found-in-the-wild.png\" rel=\"wpdevart_lightbox\"><img width=\"1024\" height=\"274\"  class=\"wp-image-103193 aligncenter lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-98.png\" srcset=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-98.png 1024w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-98-300x80.png 300w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-98-768x206.png 768w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-98-900x241.png 900w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-98-370x99.png 370w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><span style=\"font-size: 10pt;\"><em>\u56f34 \u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u3067\u898b\u3064\u304b\u3063\u305f\u653b\u6483\u6d3b\u52d5<\/em><\/span><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/Figure-5.-Directory-traversal-request-found-in-the-wild-1.jpeg\" rel=\"wpdevart_lightbox\"><img width=\"1024\" height=\"541\"  class=\"wp-image-103195 aligncenter lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-9.jpeg\" srcset=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-9.jpeg 1024w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-9-300x158.jpeg 300w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-9-768x406.jpeg 768w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-9-900x475.jpeg 900w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-9-370x195.jpeg 370w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><span style=\"font-size: 10pt;\"><em>\u56f35 \u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u3067\u898b\u3064\u304b\u3063\u305f\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\u30ea\u30af\u30a8\u30b9\u30c8<\/em><\/span><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/Figure-6.-Directory-traversal-request-found-in-the-wild-1.jpg\" rel=\"wpdevart_lightbox\"><img width=\"1024\" height=\"429\"  class=\"wp-image-103197 aligncenter lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-10.jpeg\" srcset=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-10.jpeg 1024w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-10-300x126.jpeg 300w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-10-768x322.jpeg 768w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-10-900x377.jpeg 900w, https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2020\/01\/word-image-10-370x155.jpeg 370w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><span style=\"font-size: 10pt;\"><em>\u56f36 \u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u3067\u898b\u3064\u304b\u3063\u305f\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\u30ea\u30af\u30a8\u30b9\u30c8<\/em><\/span><\/p>\n<h1><a id=\"post-103184-conclusion\"><\/a>\u7d50\u8ad6<\/h1>\n<p>\u672c\u8106\u5f31\u6027\u306f\u5e83\u304f\u4e16\u754c\u4e2d\u306e\u30e6\u30fc\u30b6\u30fc\u74b0\u5883\u306b\u898b\u3089\u308c\u308b\u3082\u306e\u3067\u3001Unit 42\u3082<a href=\"https:\/\/isc.sans.edu\/forums\/diary\/Citrix+ADC+Exploits+are+Public+and+Heavily+Used+Attempts+to+Install+Backdoor\/25700\/\">\u307b\u304b\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u7814\u7a76\u6a5f\u95a2<\/a>\u3082\u5b9f\u969b\u306b\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u3067\u6d3b\u767a\u306b\u60aa\u7528\u3055\u308c\u3066\u3044\u308b\u69d8\u5b50\u3092\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002\u6b8b\u5ff5\u306a\u304c\u3089\u3001\u672c\u8106\u5f31\u6027\u306f\u60aa\u7528\u304c\u5bb9\u6613\u3067\u3001\u30ea\u30e2\u30fc\u30c8\u304b\u3089\u306e\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u306b\u3082\u3064\u306a\u304c\u308a\u307e\u3059\u3002<\/p>\n<p>Citrix\u306f2019\u5e7412\u670817\u65e5\u306b<a href=\"https:\/\/support.citrix.com\/article\/CTX267027\">Security Bulletin CTX267027<\/a>\u3068<a href=\"https:\/\/support.citrix.com\/article\/CTX267679\">Mitigation Steps CTX267679<\/a>\u3092\u516c\u958b\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u6587\u66f8\u306f\u653b\u6483\u306e\u53ef\u80fd\u6027\u3092\u6291\u6b62\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002Citrix\u306f\u307e\u305f\u3001Citrix ADC\u304a\u3088\u3073Citrix Gateway\u306e\u30d0\u30fc\u30b8\u30e7\u30f310\u300111\u300112\u300113\u7528\u306e\u30d1\u30c3\u30c1\u30921\u6708\u4e0b\u65ec\u306b\u516c\u958b\u3059\u308b\u3053\u3068\u3092\u767a\u8868\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>Citrix\u306f\u3001\u3053\u308c\u3089\u306e\u88fd\u54c1\u3092\u5229\u7528\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u306b\u5bfe\u3057\u3001\u7279\u5b9a\u306e\u30ec\u30b9\u30dd\u30f3\u30c0\u30fc\u30dd\u30ea\u30b7\u30fc\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u306e\u8a66\u307f\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3059\u308b\u3053\u3068\u3092\u63a8\u5968\u3057\u3066\u3044\u307e\u3059\u3002CTX267679\u306e\u7de9\u548c\u624b\u9806\u3067\u306f\u3001\/..\/\u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\u306e\u8a66\u307f\u3092\u542b\u3093\u3060\u30ea\u30af\u30a8\u30b9\u30c8\u3068\u3001\/vpns\/\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3059\u308b\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b\u624b\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u3002\u30b7\u30b9\u30c6\u30e0\u7ba1\u7406\u8005\u306f\u3001\u8106\u5f31\u6027\u304c\u9069\u5207\u306b\u4fee\u6b63\u3055\u308c\u308b\u307e\u3067\u306e\u9593\u3001\u6848\u5185\u3055\u308c\u3066\u3044\u308b\u7de9\u548c\u7b56\u3092\u8b1b\u3058\u308b\u3053\u3068\u3092\u5f37\u304f\u63a8\u5968\u3057\u307e\u3059\u3002<\/p>\n<pre>add responder action respondwith403 respondwith \"\\\"HTTP\/1.1 403 \r\nForbidden\\r\\n\\r\\n\\\"\"\r\n\r\nadd responder policy ctx267027 \r\n\"HTTP.REQ.URL.DECODE_USING_TEXT_MODE.CONTAINS(\\\"\/vpns\/\\\") &amp;&amp; \r\n(!CLIENT.SSLVPN.IS_SSLVPN || \r\nHTTP.REQ.URL.DECODE_USING_TEXT_MODE.CONTAINS(\\\"\/..\/\\\"))\" \r\nrespondwith403\r\n<\/pre>\n<p>\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u5f93\u3063\u3066\u5f0a\u793e\u306e\u6b21\u4e16\u4ee3\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3092\u914d\u5099\u3057\u3001Threat Prevention\u306e\u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u3092\u304a\u6301\u3061\u306e\u304a\u5ba2\u69d8\u306f\u3001\u540cCitrix ADC\u306e\u8106\u5f31\u6027\u304b\u3089\u4fdd\u8b77\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u5f0a\u793e\u306f2020\u5e741\u67087\u65e5\u306b\u304a\u5ba2\u69d8\u306b\u540c\u8105\u5a01\u306b\u5bfe\u3059\u308b\u4fdd\u8b77\u3092\u516c\u958b\u6e08\u307f\u3067\u3059\u3002\u307e\u305f\u30012020\u5e741\u670811\u65e5\u306b\u3001\u6210\u529f\u3057\u305f\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u306b\u95a2\u3059\u308b\u516c\u958b\u30ec\u30dd\u30fc\u30c8\u3092\u30ea\u30ea\u30fc\u30b9\u3057\u3066\u3044\u307e\u3059\u3002Unit 42\u306f\u5f15\u304d\u7d9a\u304d\u672c\u8106\u5f31\u6027\u306e\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u72b6\u6cc1\u3092\u76e3\u8996\u3057\u3001\u540c\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u304c\u7d99\u7d9a\u3059\u308b\u5834\u5408\u3001\u5bfe\u5fdc\u3059\u308b\u4fdd\u8b77\u3092\u8ffd\u52a0\u3057\u3066\u3044\u304f\u4e88\u5b9a\u3067\u3059\u3002<\/p>\n<ul>\n<li>\u672c\u8106\u5f31\u6027\u306b\u5bfe\u5fdc\u3059\u308bThreat Prevention \u30b7\u30b0\u30cd\u30c1\u30e3\u306f 57497\u3068 57570\u3067\u3059\u3002<\/li>\n<li>\u307e\u305f\u3001\u672c\u8106\u5f31\u6027\u3092\u60aa\u7528\u3059\u308b\u7570\u5e38\u306a\u30b9\u30ad\u30e3\u30f3\u6d3b\u52d5\u306b\u95a2\u9023\u3059\u308b\u4ee5\u4e0b\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u300cPalo Alto Networks Known Malicious IP addresses (\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9 \u65e2\u77e5\u306e\u60aa\u610f\u306e\u3042\u308bIP\u30a2\u30c9\u30ec\u30b9)\u300d\u306e\u30d6\u30ed\u30c3\u30af\u30ea\u30b9\u30c8\u306b\u8ffd\u52a0\u3055\u308c\u3066\u3044\u307e\u3059\u3002PAN-OS 8.1\u4ee5\u964d\u3092\u3054\u5229\u7528\u4e2d\u306e\u304a\u5ba2\u69d8\u306f\u3001<a href=\"https:\/\/docs.paloaltonetworks.com\/pan-os\/8-1\/pan-os-admin\/policy\/use-an-external-dynamic-list-in-policy\/palo-alto-networks-malicious-ip-address-feeds\">pre-defined External Dynamic Lists<\/a>\u3092\u4f7f\u3046\u3053\u3068\u306b\u3088\u308a\u3001\u30dd\u30ea\u30b7\u30fc\u5185\u3067\u30d6\u30ed\u30c3\u30af\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<h3><a id=\"post-103184-iocs\"><\/a>IOC<\/h3>\n<ul>\n<li>111[.]206[.]59[.]134<\/li>\n<li>111[.]206[.]52[.]101<\/li>\n<li>111[.]206[.]52[.]81<\/li>\n<li>111[.]206[.]59[.]142<\/li>\n<li>104[.]244[.]74[.]47<\/li>\n<li>104[.]168[.]166[.]234<\/li>\n<li>23[.]129[.]64[.]157<\/li>\n<li>27[.]115[.]124[.]70<\/li>\n<li>27[.]115[.]124[.]9<\/li>\n<li>27[.]115[.]124[.]74<\/li>\n<li>45[.]32[.]45[.]46<\/li>\n<li>45[.]83[.]67[.]200<\/li>\n<li>47[.]52[.]196[.]15<\/li>\n<li>47[.]52[.]196[.]152<\/li>\n<li>167[.]88[.]7[.]134<\/li>\n<li>185[.]212[.]170[.]163<\/li>\n<li>5[.]101[.]0[.]209<\/li>\n<li>185[.]220[.]101[.]69<\/li>\n<li>85[.]248[.]227[.]164<\/li>\n<li>192[.]236[.]192[.]119<\/li>\n<li>192[.]236[.]192[.]3<\/li>\n<li>94[.]140[.]114[.]194<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981 \u6628\u5e74\u672b\u3001Citrix Application Delivery Controller\uff08ADC\uff09\u304a\u3088\u3073Citrix Gateway\u306b\u8106\u5f31\u6027\u304c\u78ba\u8a8d\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u306e\u8106\u5f31\u6027\u3092\u60aa\u7528\u3057\u305f\u30ea\u30e2\u30fc\u30c8\u306e\u653b\u6483\u8005\u306f\u3001\u5bb9\u6613\u306b\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8<\/p>\n","protected":false},"author":278,"featured_media":103185,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[4469,4428,4470],"tags":[4875,6338,4969,4853],"product_categories":[4338,4456],"coauthors":[836,1727,1726,1725,1434,1348,1032],"class_list":["post-103184","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vulnerabilities","category-threat-research-ja","category-vulnerabilities-ja","tag-citrix-ja","tag-cve-2019-19781","tag-proof-of-concept-ja","tag-remote-code-execution-ja","product_categories-next-generation-firewall","product_categories-next-generation-firewall-ja"],"yoast_head":"<!-- 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