{"id":105968,"date":"2015-06-01T13:20:18","date_gmt":"2015-06-01T20:20:18","guid":{"rendered":"https:\/\/unit42.paloaltonetworks.com\/?p=105968"},"modified":"2020-04-06T19:25:05","modified_gmt":"2020-04-07T02:25:05","slug":"understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit","status":"publish","type":"post","link":"https:\/\/unit42.paloaltonetworks.com\/ja\/understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit\/","title":{"rendered":"Flash\u306e\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u304a\u3088\u3073CVE-2015-0359\u306b\u3088\u308b\u3082\u306e\u3068\u3055\u308c\u308b\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u306b\u3064\u3044\u3066"},"content":{"rendered":"<h2>\u6982\u8981<\/h2>\n<p>\u5f0a\u793e\u304cCVE-2015-X\u3068\u547c\u3093\u3067\u3044\u308b\u8106\u5f31\u6027\u306e\u6839\u672c\u7684\u306a\u539f\u56e0\u306b\u95a2\u3059\u308b\u8a73\u7d30\u306a\u5206\u6790\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u305d\u306e\u8106\u5f31\u6027\u3092\u5f15\u304d\u8d77\u3053\u3059\u65b9\u6cd5\u306b\u3064\u3044\u3066\u3082\u9806\u3092\u8ffd\u3063\u3066\u8aac\u660e\u3057\u307e\u3059\u3002Flash\u306e\u8106\u5f31\u6027\u306e\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001\u300c<a href=\"https:\/\/blog.paloaltonetworks.com\/2015\/05\/the-latest-flash-uaf-vulnerabilities-in-exploit-kits\/\" data-page-track=\"true\" data-page-track-value=\"company:0623-understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit: section: \">\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8 \u30ad\u30c3\u30c8\u306b\u304a\u3051\u308b\u6700\u8fd1\u306eUAF\u8106\u5f31\u6027\u300d<\/a>(\u6295\u7a3f\u8005: Tao Yan\u3001\u6295\u7a3f\u65e5: 5\u670828\u65e5)\u3082\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u305d\u308c\u307b\u3069\u524d\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u304c\u3001\u5f0a\u793e\u306f\u3001<a href=\"https:\/\/www.fireeye.com\/blog\/threat-research\/2015\/04\/angler_ek_exploiting.html\" data-page-track=\"true\" data-page-track-value=\"company:0623-understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit: section: \">CVE-2015-0359<\/a>\u3092\u60aa\u7528\u3057\u305f\u3082\u306e\u3068\u601d\u308f\u308c\u308b\u3001Angler\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8 \u30ad\u30c3\u30c8(MD5:049ff69bc23f36a78d86bbf1356c2f63c)\u304b\u3089\u306e\u30b5\u30f3\u30d7\u30eb\u3092\u691c\u51fa\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u96a0\u853d\u3055\u308c\u305fSWF\u306b\u306f\u3001\u30a8\u30f3\u30b3\u30fc\u30c9\u6e08\u307f\u306eSWF (MD5: d45808cfa6f3cbfb343fdea269fdc375)\u304c\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u30c7\u30a3\u30b9\u30af\u306b\u4fdd\u5b58\u305b\u305a\u306b\u3001\u5f8c\u3067Flash\u3067\u30c7\u30b3\u30fc\u30c9\u3057\u3066\u30ed\u30fc\u30c9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u6539\u5909\u3057\u305f\u30b5\u30f3\u30d7\u30eb\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<div align=\"center\"><img  class=\"aligncenter lozad\"  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_1.png\" \/><\/div>\n<p>\u57cb\u3081\u8fbc\u307e\u308c\u305fSWF\u306f\u5165\u5ff5\u306b\u96a0\u853d\u3055\u308c\u305f\u3082\u306e\u3067\u3059\u304c\u3001\u3053\u306e\u30b3\u30fc\u30c9\u3068<a href=\"https:\/\/github.com\/SecurityObscurity\/cve-2015-0313\" data-page-track=\"true\" data-page-track-value=\"company:0623-understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit: section: \">Angler EK\u306eCVE-2015-0313\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u306e\u30bd\u30fc\u30b9 \u30b3\u30fc\u30c9<\/a>\u3068\u306e\u9593\u306b\u306f\u591a\u304f\u306e\u5171\u901a\u70b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u6700\u521d\u306b\u3001\u3053\u306e\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u304c\u672c\u5f53\u306bCVE-2015-0359\u3092\u5bfe\u8c61\u3068\u3057\u305f\u3082\u306e\u306a\u306e\u304b\u3069\u3046\u304b\u3092\u8abf\u3079\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u7814\u7a76\u8005\u306e\u4e2d\u306b\u306f\u3001<a href=\"https:\/\/blog.trendmicro.com\/trendlabs-security-intelligence\/latest-flash-exploit-in-angler-ek-might-not-really-be-cve-2015-0359\/\" data-page-track=\"true\" data-page-track-value=\"company:0623-understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit: section: \">\u305d\u3046\u8003\u3048\u3066\u3044\u306a\u3044\u4eba\u3082\u3044\u307e\u3059\u3002<\/a>\u57cb\u3081\u8fbc\u307e\u308c\u305fSWF\u306b\u306f\u3001CheckEnvironment\u3068\u3044\u3046\u95a2\u6570\u304c\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u3053\u306e\u95a2\u6570\u306f\u6700\u5f8c\u306b\u4e0b\u8a18\u306e\u51e6\u7406\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_2.png\" \/><\/div>\n<p>\u3053\u3053\u3067\u3001playerVerOk\u304ctrue\u306b\u306a\u308b\u306e\u304cFlash Player\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u304c13.0.0.250\u4ee5\u4e0a\u306713.0.0.269\u3088\u308a\u3082\u53e4\u3044\u5834\u5408\u3001\u307e\u305f\u306fFlash Player\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u304c15.0.0.189\u4ee5\u4e0a\u306716.0.0.305\u3088\u308a\u3082\u53e4\u3044\u5834\u5408\u3067\u3042\u308b\u3053\u3068\u306b\u6ce8\u76ee\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u3057\u304b\u3057\u3001\u95a2\u6570\u306f\u524d\u8ff0\u306e\u5404\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u52a0\u3048\u3001\u30d0\u30fc\u30b8\u30e7\u30f313.0.0.277\u306817.0.0.134\u306b\u5bfe\u3057\u3066\u3082true\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n<p>\u3064\u307e\u308a\u3001\u305d\u308c\u3089\u306e\u3069\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3082\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306f\u3001\u4ee5\u4e0b\u306e\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u304c\u767a\u751f\u3057\u306a\u3044\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  class=\"aligncenter lozad\"  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_3.png\" \/><\/div>\n<p>\u3055\u3089\u306b\u8208\u5473\u6df1\u3044\u3053\u3068\u306b\u3001(\u8106\u5f31\u6027\u3092\u5f15\u304d\u8d77\u3053\u3059)\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u81ea\u4f53\u304c\u3001\u6b21\u306b\u793a\u3059\u3088\u3046\u306b\u3001Flash\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u57fa\u3065\u3044\u3066\u9078\u629e\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  class=\"aligncenter lozad\"  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_4.png\" \/><\/div>\n<p>Flash\u30d0\u30fc\u30b8\u30e7\u30f313.0.0.250\u4ee5\u4e0a\u306713.0.0.269\u3088\u308a\u53e4\u3044\u5834\u5408\u3001\u304a\u3088\u3073Flash\u30d0\u30fc\u30b8\u30e7\u30f315.0.0.189\u4ee5\u4e0a\u306716.0.0.305\u3088\u308a\u53e4\u3044\u5834\u5408\u306f\u3001<a href=\"https:\/\/blog.coresecurity.com\/2015\/04\/13\/analysis-of-adobe-flash-player-shared-bytearray-use-after-free-vulnerability\/\" data-page-track=\"true\" data-page-track-value=\"company:0623-understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit: section: \">CVE-2015-0313\u304c\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/a><a href=\"https:\/\/cve.mitre.org\/cgi-bin\/cvename.cgi?name=CVE-2015-0313\" data-page-track=\"true\" data-page-track-value=\"company:0623-understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit: section: \">CVE-2015-0313\u306e\u8aac\u660e\u306b\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/a><\/p>\n<p>\u300cWindows\u3067\u306f\u300113.0.0.269\u3088\u308a\u524d\u3001\u304a\u3088\u307314.x\u304b\u308916.x (16.0.0.305\u3088\u308a\u524d)\u306eAdobe Flash Player\u306b\u304a\u3044\u3066Use-After-Free\u8106\u5f31\u6027\u304c\u3042\u308a\u2026\u300d<\/p>\n<p>Flash\u30d0\u30fc\u30b8\u30e7\u30f3\u304c13.0.0.277\u307e\u305f\u306f17.0.0.134\u306e\u3068\u304d\u306f\u3001\u5225\u306e\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8(\u30c8\u30ea\u30ac\u30fc)\u304c\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u4e92\u3044\u306e\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8 \u30d1\u30b9\u304c\u7570\u306a\u3063\u3066\u3044\u308b\u552f\u4e00\u306e\u884c\u3067\u3042\u308b\u305f\u3081\u3001CVE-2015-0359\u306e\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u3067\u3042\u308c\u3070\u3001CVE-2015-0313\u306e\u3082\u306e\u3068\u985e\u4f3c\u3057\u305f<a href=\"https:\/\/cve.mitre.org\/cgi-bin\/cvename.cgi?name=CVE-2015-0359\" data-page-track=\"true\" data-page-track-value=\"company:0623-understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit: section: \">\u8aac\u660e<\/a>\u3092\u671f\u5f85\u3067\u304d\u308b\u306f\u305a\u3067\u3059\u304c\u3001\u305d\u306e\u4ee3\u308f\u308a\u306b\u3001\u6b21\u306e\u3088\u3046\u306b\u8aac\u660e\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u300cWindows\u3067\u306f\u300113.0.0.281\u3088\u308a\u524d\u3001\u304a\u3088\u307314.x\u304b\u308917.x (17.0.0.169\u3088\u308a\u524d)\u306eAdobe Flash Player\u306b\u304a\u3044\u3066Double-Free\u8106\u5f31\u6027\u304c\u3042\u308a\u2026\u300d<\/p>\n<p>\u3053\u308c\u306f\u3001CVE-2015-0359\u3067\u306f\u306a\u3044\u3068\u65ad\u8a00\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001Double-Free\u8106\u5f31\u6027(\u5b9f\u969b\u306e\u8a3c\u62e0\u306b\u3064\u3044\u3066\u306f\u3001\u300c\u6280\u8853\u5206\u6790\u300d\u3092\u53c2\u7167)\u3067\u306f\u306a\u304f\u3001<a href=\"https:\/\/blog.paloaltonetworks.com\/2015\/05\/the-latest-flash-uaf-vulnerabilities-in-exploit-kits\/\" data-page-track=\"true\" data-page-track-value=\"company:0623-understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit: section: \">Use-After-Free (UAF)\u8106\u5f31\u6027<\/a>\u3067\u3042\u308b\u3068\u63a8\u6e2c\u3067\u304d\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u3053\u306e\u8106\u5f31\u6027\u306fCVE-2015-X\u3068\u547c\u3076\u3053\u3068\u306b\u3057\u307e\u3059\u3002<\/p>\n<p>CVE-2015-X\u306e\u30a4\u30d9\u30f3\u30c8\u5c65\u6b74\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<p>2\u67082\u65e5:\u5b9f\u4e16\u754c\u3067\u306e\u30bc\u30ed\u30c7\u30a4 \u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u306b\u4ed8\u968f\u3057\u3066\u3001<a href=\"https:\/\/blog.trendmicro.com\/trendlabs-security-intelligence\/trend-micro-discovers-new-adobe-flash-zero-day-exploit-used-in-malvertisements\/\" data-page-track=\"true\" data-page-track-value=\"company:0623-understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit: section: \">CVE-2015-0313\u304c\u691c\u51fa<\/a>\u3055\u308c\u308b\u3002<\/p>\n<p>2\u67084\u65e5\u30015\u65e5:<a href=\"https:\/\/helpx.adobe.com\/security\/products\/flash-player\/apsa15-02.html\" data-page-track=\"true\" data-page-track-value=\"company:0623-understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit: section: \">CVE-2015-0313\u306b\u5bfe\u5fdc\u3057\u305f\u81ea\u52d5\/\u624b\u52d5\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u7528\u306e\u30d1\u30c3\u30c1\u9069\u7528\u6e08\u307f\u30d0\u30fc\u30b8\u30e7\u30f3\u304c\u3001Adobe\u306b\u3088\u3063\u3066\u30ea\u30ea\u30fc\u30b9<\/a>\u3055\u308c\u308b\u3002\u30d1\u30c3\u30c1\u9069\u7528\u6e08\u307f\u30d0\u30fc\u30b8\u30e7\u30f3\u306f16.0.0.305\u3067\u3001CVE-2015-X\u3082\u963b\u6b62\u3059\u308b\u3002<\/p>\n<p>2\u670825\u65e5:<a href=\"https:\/\/hacklab.kr\/?p=305\" data-page-track=\"true\" data-page-track-value=\"company:0623-understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit: section: \">CVE-2015-0313\u3092\u5bfe\u8c61\u3068\u3057\u305f\u5b8c\u5168\u306b\u6a5f\u80fd\u3059\u308b\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8 \u30b3\u30fc\u30c9<\/a>\u304c\u516c\u958b\u3055\u308c\u308b\u3002\u6570\u884c\u306e\u30b3\u30fc\u30c9\u3092\u5909\u66f4\u3059\u308b\u3060\u3051\u3067\u3001CVE-2015-X\u304c\u4f5c\u6210\u3055\u308c\u308b\u3053\u3068\u304c\u5224\u660e\u3002<\/p>\n<p>3\u670812\u65e5:<a href=\"https:\/\/helpx.adobe.com\/flash-player\/release-note\/fp_17_air_17_release_notes.html\" data-page-track=\"true\" data-page-track-value=\"company:0623-understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit: section: \">Flash Player 17.0.0.134\u304c\u30ea\u30ea\u30fc\u30b9<\/a>\u3055\u308c\u308b\u3002CVE-2015-X\u306b\u5bfe\u3057\u3066\u8106\u5f31\u3067\u3042\u308b\u3053\u3068\u304c\u5224\u660e\u3002<\/p>\n<p>4\u670814\u65e5:<a href=\"https:\/\/helpx.adobe.com\/security\/products\/flash-player\/apsb15-06.html\" data-page-track=\"true\" data-page-track-value=\"company:0623-understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit: section: \">CVE-2015-0359\u304a\u3088\u3073CVE-2015-X\u3092\u4e21\u65b9\u3068\u3082\u4fee\u6b63<\/a>\u3059\u308bFlash Player 17.0.0.169\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u308b\u3002<\/p>\n<p>\u3053\u306e\u5c65\u6b74\u3092\u898b\u308b\u3068\u3001\u653b\u6483\u8005\u306b\u306f\u3001CVE-2015-X\u3092\u6a19\u7684\u3068\u3057\u305f\u958b\u767a\u3092\u884c\u3063\u305f\u308a\u3001Flash Player 17.0.0.134\u3078\u306e\u30bc\u30ed\u30c7\u30a4 \u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u3068\u3057\u3066CVE-2015-X\u3092\u5229\u7528\u3059\u308b\u305f\u3081\u306b\u3001\u307e\u308b1\u304b\u6708\u306e\u4f59\u88d5\u304c\u3042\u3063\u305f\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002CVE-2015-0313\u304a\u3088\u3073CVE-2015-X\u306b\u5bfe\u3059\u308b\u653b\u6483\u306f\u3001\u3069\u3061\u3089\u3082<a href=\"https:\/\/www.paloaltonetworks.jp\/products\/endpoint-security.html\" data-page-track=\"true\" data-page-track-value=\"company:0623-understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit: section: \">\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306eTraps<\/a>\u306b\u3088\u3063\u3066\u3001\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u306e\u521d\u671f\u6bb5\u968e\u3067\u963b\u6b62\u3055\u308c\u307e\u3057\u305f\u3002\u305d\u306e\u969b\u306b\u3001\u30de\u30b7\u30f3\u3068\u7d44\u7e54\u306e\u53cc\u65b9\u306b\u88ab\u5bb3\u304c\u3082\u305f\u3089\u3055\u308c\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u8106\u5f31\u6027\u3084\u653b\u6483\u306b\u5bfe\u3059\u308b\u4e88\u5099\u77e5\u8b58\u304c\u306a\u3044\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u9632\u5fa1\u304c\u63d0\u4f9b\u3055\u308c\u305f\u306e\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u72b6\u6cc1\u306e\u91cd\u5927\u3055\u3092\u628a\u63e1\u3057\u305f\u5f8c\u3001\u300c\u3055\u307e\u3056\u307e\u306a\u300d\u8106\u5f31\u6027\u3092\u5f15\u304d\u8d77\u3053\u3059\u540c\u69d8\u306e\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u304c\u5c11\u306a\u304f\u3068\u3082\u8907\u6570\u5b58\u5728\u3059\u308b\u3053\u3068\u3092\u8e0f\u307e\u3048\u3066\u3001\u3053\u306e\u3088\u3046\u306a\u8106\u5f31\u6027\u306e\u6839\u672c\u7684\u306a\u539f\u56e0\u306b\u3064\u3044\u3066\u7406\u89e3\u3092\u6df1\u3081\u3066\u3044\u304d\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u8106\u5f31\u6027\u306e\u6839\u672c\u7684\u306a\u539f\u56e0\u3084\u8106\u5f31\u6027\u306e\u30c8\u30ea\u30ac\u30fc \u30d5\u30ed\u30fc\u3092\u793a\u3057\u305f\u8a73\u7d30\u306a\u6280\u8853\u5206\u6790\u306b\u3064\u3044\u3066\u3001\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u307f\u9032\u3081\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3><b>\u6280\u8853\u5206\u6790<\/b><\/h3>\n<p>\u3053\u306e\u6280\u8853\u5206\u6790\u3067\u306f\u3001<a href=\"https:\/\/download.macromedia.com\/pub\/flashplayer\/installers\/archive\/fp_16.0.0.287_archive.zip\" data-page-track=\"true\" data-page-track-value=\"company:0623-understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit: section: \">Flash 16.0.0.287\u306eActiveX\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb<\/a>\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u3053\u306e\u5206\u6790\u306f\u3001<a href=\"https:\/\/github.com\/adobe-flash\/avmplus\" data-page-track=\"true\" data-page-track-value=\"company:0623-understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit: section: \">Actionscript Virtual Machine (AVM)\u306e\u30bd\u30fc\u30b9 \u30b3\u30fc\u30c9<\/a>\u3068\u3082\u76f8\u95a2\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>CVE-2015-0313\u304a\u3088\u3073CVE-2015-X\u306e\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u306f\u3001\u3069\u3061\u3089\u3082Flash\u306eByteArray\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092domainMemory\u3068\u9023\u643a\u3055\u305b\u3066\u4f7f\u7528\u3057\u3066\u304a\u308a\u3001\u3053\u306edomainMemory\u304c\u3001\u30c0\u30f3\u30b0\u30ea\u30f3\u30b0 \u30dd\u30a4\u30f3\u30bf\u3092\u5b9f\u969b\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u3053\u308c\u304b\u3089\u3001\u4e0a\u8a18\u306eUse-After-Free\u72b6\u6cc1\u3092\u3069\u306e\u3088\u3046\u306b\u5b9f\u73fe\u3067\u304d\u308b\u304b\u3092\u8aac\u660e\u3059\u308b\u3068\u3068\u3082\u306b\u3001ByteArray\u30af\u30e9\u30b9\u306e\u8a2d\u8a08\u306b\u6f5c\u3080\u91cd\u5927\u306a\u6b20\u9665\u3092\u793a\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u3001Flash\u304c\u516c\u958b\u3057\u3066\u3044\u308b\u30af\u30e9\u30b9\u540d\u3068\u3001AVM\u3067\u8868\u793a\u3055\u308c\u308b\u30af\u30e9\u30b9\u540d\u3068\u306e\u9593\u306b\u306f\u3001\u91cd\u8981\u306a\u9055\u3044\u304c\u3042\u308b\u3053\u3068\u3092\u660e\u8a18\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001Flash\u306eByteArray\u30af\u30e9\u30b9\u306fAVM\u30bd\u30fc\u30b9 \u30b3\u30fc\u30c9\u306eByteArrayObject\u30af\u30e9\u30b9\u306b\u3088\u3063\u3066\u8868\u3055\u308c\u3066\u304a\u308a\u3001\u30d0\u30a4\u30c8\u914d\u5217\u5b9f\u88c5\u306e\u5185\u90e8\u8868\u73fe\u3067\u3042\u308b\u3001AVM\u306eByteArray\u30af\u30e9\u30b9\u3068\u9593\u9055\u3048\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30ea\u30b5\u30fc\u30c1\u8a18\u4e8b\u306e\u6b8b\u308a\u306e\u90e8\u5206\u3067\u306f\u3001AVM\u3067\u8868\u793a\u3055\u308c\u308b\u30af\u30e9\u30b9\u540d\u306e\u307f\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<p>AVM\u306fC++\u3067\u8a18\u8ff0\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u4ed6\u306e\u8a00\u8a9e\u3068\u306f\u7570\u306a\u308a\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u9759\u7684(\u5b9f\u969b\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u623b\u308a\u5024\u306b\u306a\u308b)\u3001\u52d5\u7684(\u65b0\u3057\u3044\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u3066\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3078\u306e\u30dd\u30a4\u30f3\u30bf(\u53c2\u7167)\u304c\u623b\u308a\u5024\u306b\u306a\u308b)\u3068\u3044\u3046\u30012\u3064\u306e\u65b9\u6cd5\u3067\u4f5c\u6210\u3055\u308c\u307e\u3059\u3002\u30d0\u30a4\u30c8\u914d\u5217\u3092\u8868\u3059\u30af\u30e9\u30b9\u3067\u306f\u3001\u3053\u308c\u3089\u4e21\u65b9\u306e\u65b9\u6cd5\u3092\u4f7f\u7528\u3057\u3066\u30e1\u30f3\u30d0\u30fc\u5909\u6570\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n<p>ByteArrayObject\u306e\u30e1\u30f3\u30d0\u30fc\u5909\u6570\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<div align=\"center\"><img  class=\"aligncenter lozad\"  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_5.png\" \/><\/div>\n<p>m_byteArray\u306f\u3001ByteArray\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u9759\u7684\u306a\u5272\u308a\u5f53\u3066\u3067\u3059\u3002Flash\u306e\u30c6\u30b9\u30c8\u6e08\u307f\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306f\u3001ByteArrayObject\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u304a\u3051\u308b\u305d\u306e\u30aa\u30d5\u30bb\u30c3\u30c8\u306f0x18\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>ByteArray\u30af\u30e9\u30b9\u306f\u3001DataInput\u3068DataOutput\u306e\u4e21\u65b9\u304b\u3089\u7d99\u627f\u3059\u308b\u305f\u3081\u3001\u305d\u308c\u3089\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u8868\u73fe\u3092\u6697\u9ed9\u7684\u306b\u542b\u307f\u307e\u3059\u3002\u5f0a\u793e\u306f\u3001ByteArray\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5185\u306b\u3042\u308bDataOutput\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30aa\u30d5\u30bb\u30c3\u30c8\u304c0x8\u3067\u3042\u308b\u3053\u3068\u306b\u6ce8\u76ee\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>ByteArray\u306e\u30e1\u30f3\u30d0\u30fc\u5909\u6570\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<div align=\"center\"><img  class=\"aligncenter lozad\"  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_6.png\" \/><\/div>\n<p>\u3053\u3053\u306b\u306f\u3001\u6b21\u306e3\u3064\u306e\u8208\u5473\u6df1\u3044\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>m_buffer:1\u3064\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u6301\u3064\u30af\u30e9\u30b9\u304b\u3089\u306a\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3002\u3053\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u3001ByteArray::Buffer\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30dd\u30a4\u30f3\u30c8\u3057\u3066\u304a\u308a\u3001\u305d\u308c\u3092\u305f\u3069\u308b\u3068\u5b9f\u969b\u306e\u30d0\u30a4\u30c8\u914d\u5217\u306b\u5230\u9054\u3057\u307e\u3059\u3002\u30e1\u30e2\u30ea\u5185\u3067\u306f\u3001\u3053\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u5148\u884c\u3059\u308b\u8ffd\u52a0\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u3057\u3066\u3001FixedHeapRef\u30af\u30e9\u30b9\u3078\u306e\u4eee\u60f3\u95a2\u6570\u8868\u30dd\u30a4\u30f3\u30bf\u304c\u5b58\u5728\u3057\u307e\u3059\u3002m_buffer\u306fByteArray\u30af\u30e9\u30b9\u306e\u30aa\u30d5\u30bb\u30c3\u30c80x24\u306b\u3042\u308b\u305f\u3081\u3001\u5bfe\u8c61\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u30aa\u30d5\u30bb\u30c3\u30c80x28\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>m_isShareable:\u3053\u308c\u306b\u3088\u308a\u3001\u30ef\u30fc\u30ab\u30fc(Flash\u306e\u30b9\u30ec\u30c3\u30c9\u306b\u76f8\u5f53)\u9593\u3067\u30d0\u30a4\u30c8\u914d\u5217\u3092\u5171\u6709\u3067\u304d\u308b\u304b\u3069\u3046\u304b\u3092\u5224\u5225\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u7279\u306b\u3001\u30af\u30e9\u30b9\u306e\u30b3\u30d4\u30fc \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306b\u5f71\u97ff\u3092\u53ca\u307c\u3057\u307e\u3059\u3002\u30d0\u30a4\u30c8\u914d\u5217\u304c\u5171\u6709\u3055\u308c\u308b\u3068\u3001\u30c7\u30fc\u30bf\u3092\u30b3\u30d4\u30fc\u3059\u308b\u5fc5\u8981\u306f\u306a\u304f\u306a\u308b\u304b\u3089\u3067\u3059\u3002\u305d\u306e\u4ee3\u308f\u308a\u306b\u3001m_buffer\u304c\u30dd\u30a4\u30f3\u30c8\u3057\u3066\u3044\u308b\u3082\u306e\u3068\u307e\u3063\u305f\u304f\u540c\u3058ByteArray::Buffer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30dd\u30a4\u30f3\u30c8\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u3001\u30aa\u30d5\u30bb\u30c3\u30c80x2C\u3067\u691c\u51fa\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<p>m_subscribers:\u3053\u308c\u306f\u3001ListData\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u3092\u683c\u7d0d\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3059\u3002ListData\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u306f\u3001\u30d0\u30a4\u30c8\u914d\u5217\u306e\u518d\u5272\u308a\u5f53\u3066\u6642\u3084\u89e3\u653e\u6642(\u3064\u307e\u308a\u3001\u30e1\u30e2\u30ea\u5185\u306b\u304a\u3051\u308b\u914d\u7f6e\u5834\u6240\u306e\u5909\u66f4\u6642)\u3001\u307e\u305f\u306f\u5358\u306b\u305d\u306e\u30b5\u30a4\u30ba\u304c\u5909\u66f4\u3055\u308c\u305f\u6642\u306e\u901a\u77e5\u5148\u3067\u3042\u308b\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306b\u95a2\u3059\u308b\u60c5\u5831\u304c\u683c\u7d0d\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u30d0\u30a4\u30c8\u914d\u5217\u306f\u52d5\u7684\u306b\u62e1\u5f35\u307e\u305f\u306f\u6d88\u53bb\u3067\u304d\u308b\u305f\u3081\u3001\u3053\u306e\u6a5f\u80fd\u306f\u91cd\u8981\u3067\u3059\u304c\u3001domainMemory\u306a\u3069\u306e\u5b9f\u969b\u306e\u30d0\u30a4\u30c8\u914d\u5217\u30c7\u30fc\u30bf\u3078\u306e\u76f4\u63a5\u7684\u306a\u30dd\u30a4\u30f3\u30bf\u3092\u6709\u3059\u308b\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u307f\u304c\u5bfe\u8c61\u306b\u306a\u308a\u307e\u3059\u3002ListData\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u3092\u6709\u3059\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u3001ByteArray\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30aa\u30d5\u30bb\u30c3\u30c80x18\u306b\u5b58\u5728\u3057\u307e\u3059\u3002<\/p>\n<p>m_buffer\u304b\u3089\u5230\u9054\u53ef\u80fd\u306aByteArray::Buffer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u306f\u3001\u6b21\u306e\u3088\u3046\u306a\u8208\u5473\u6df1\u3044\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u5b58\u5728\u3057\u307e\u3059\u3002<\/p>\n<p>array (\u30aa\u30d5\u30bb\u30c3\u30c80x8):\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3059\u308b\u5b9f\u969b\u306e\u30d0\u30a4\u30c8\u914d\u5217\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u3002<\/p>\n<p>capacity (\u30aa\u30d5\u30bb\u30c3\u30c80xC):\u914d\u5217\u304c\u683c\u7d0d\u3067\u304d\u308b\u6700\u5927\u30d0\u30a4\u30c8\u6570(\u5b9f\u969b\u306e\u5272\u308a\u5f53\u3066)\u3002<\/p>\n<p>length (\u30aa\u30d5\u30bb\u30c3\u30c80x10):\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u73fe\u5728\u300c\u4f7f\u7528\u3057\u3066\u3044\u308b\u300d\u914d\u5217\u30d0\u30a4\u30c8\u6570\u3002\u5272\u308a\u5f53\u3066(capacity\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u5224\u5225\u53ef\u80fd)\u3088\u308a\u3082\u591a\u304f\u306e\u30d0\u30a4\u30c8\u6570\u3092\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u4f7f\u7528\u3059\u308b\u3068\u304d\u306f\u3001\u30d0\u30a4\u30c8\u914d\u5217\u306e\u518d\u5272\u308a\u5f53\u3066\u304c\u5fc5\u8981\u3067\u3059\u3002\u3064\u307e\u308a\u3001\u30e1\u30e2\u30ea\u5185\u306e\u5225\u306e\u30a2\u30c9\u30ec\u30b9\u306b\u914d\u5217\u30dd\u30a4\u30f3\u30bf\u306e\u30dd\u30a4\u30f3\u30c8\u5148\u304c\u5909\u66f4\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u6700\u5f8c\u306b\u3001m_subscribers\u304b\u3089\u5230\u9054\u53ef\u80fd\u306aListData\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u306f\u3001\u6b21\u306e\u95a2\u9023\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u5b58\u5728\u3057\u307e\u3059\u3002<\/p>\n<p>len (\u30aa\u30d5\u30bb\u30c3\u30c80x4):\u5b9f\u969b\u306e\u30d0\u30a4\u30c8\u914d\u5217\u30d0\u30c3\u30d5\u30a1\u3092\u518d\u5272\u308a\u5f53\u3066(\u30e1\u30e2\u30ea\u5185\u306e\u914d\u7f6e\u5834\u6240\u3092\u5909\u66f4)\u3059\u308b\u969b\u306b\u901a\u77e5\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u6570\u3002<\/p>\n<p>\u6b21\u306e\u56f3\u306f\u3001\u8abf\u67fb\u5bfe\u8c61\u306eFlash\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u304a\u3051\u308bCVE-2015-X\u306e\u95a2\u9023\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u95a2\u9023\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  class=\"aligncenter lozad\"  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_7.png\" \/><\/div>\n<h3><b>\u6839\u672c\u7684\u306a\u539f\u56e0<\/b><\/h3>\n<p>CVE-2015-X\u306e\u6839\u672c\u7684\u306a\u539f\u56e0\u3068\u3057\u3066\u8003\u3048\u3089\u308c\u308b\u306e\u306f\u3001ByteArray\u306e\u30b3\u30d4\u30fc \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306b\u76f8\u5f53\u3059\u308b\u6a5f\u80fd\u304c\u3001\u5171\u6709\u53ef\u80fd\u306a\u30d0\u30a4\u30c8\u914d\u5217\u3092\u51e6\u7406\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002\u30d0\u30a4\u30c8\u914d\u5217\u304c\u5171\u6709\u53ef\u80fd\u306a\u5834\u5408\u3001\u30b3\u30d4\u30fc \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u3001ByteArray::Buffer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3059\u308b\u307e\u3063\u305f\u304f\u540c\u3058\u53c2\u7167\u3092\u4f7f\u7528\u3057\u307e\u3059\u304c\u3001\u305d\u306e\u30d0\u30a4\u30c8\u914d\u5217\u306e\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u306f\u3001\u3059\u3079\u3066\u5fd8\u308c\u53bb\u3089\u308c\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001Use-After-Free\u72b6\u614b\u304c\u767a\u751f\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u72b6\u614b\u3067\u306f\u3001\u5b9f\u969b\u306e\u30d0\u30a4\u30c8\u914d\u5217\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u304c\u5909\u66f4\u3055\u308c\u3066\u3082(\u53e4\u3044\u30d0\u30a4\u30c8\u914d\u5217\u304c\u89e3\u653e\u3055\u308c\u3066\u3082)\u3001\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u3078\u306e\u901a\u77e5\u306f\u884c\u308f\u308c\u306a\u3044\u305f\u3081\u3001\u305d\u306e\u3046\u3061\u306e1\u3064\u304c\u5f8c\u3067\u30c0\u30f3\u30b0\u30ea\u30f3\u30b0 \u30dd\u30a4\u30f3\u30bf\u3092\u4f7f\u7528\u3057\u3088\u3046\u3068\u3057\u3066\u3057\u307e\u3046\u4e8b\u614b\u304c\u8d77\u304d\u307e\u3059\u3002<\/p>\n<p>\u5b9f\u969b\u306b\u306f2\u3064\u306e\u30b3\u30d4\u30fc \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u5b58\u5728\u3057\u3066\u304a\u308a\u3001\u3053\u308c\u3089\u306f\u4e21\u65b9\u3068\u3082\u3001\u540c\u3058\u30ed\u30b8\u30c3\u30af\u306e\u6b20\u9665\u3092\u62b1\u3048\u3066\u3044\u307e\u3059\u3002\u30ef\u30fc\u30ab\u30fc\u3068\u4e00\u7dd2\u306b\u4f7f\u7528\u3059\u308b\u6b21\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u898b\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<div align=\"center\"><img  class=\"aligncenter lozad\"  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_8.png\" \/><\/div>\n<p>\u3053\u3053\u3067\u306f\u3001m_subscribers\u304c\u7a7a\u306e\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0 \u30ea\u30b9\u30c8\u3068\u3057\u3066\u521d\u671f\u5316\u3055\u308c\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001ByteaArray::Buffer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u914d\u5217\u30e1\u30f3\u30d0\u30fc\u3092\u5bfe\u8c61\u3068\u3057\u305f\u5909\u66f4\u901a\u77e5\u3092\u53d7\u4fe1\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u306e\u5b58\u5728\u304c\u4e8b\u5b9f\u4e0a\u7121\u8996\u3055\u308c\u307e\u3059\u3002\u4e0a\u8a18\u306e\u56f3\u3092\u898b\u308b\u3068\u3001\u3053\u306e\u73fe\u8c61\u304c\u30ef\u30fc\u30ab\u30fc\u306e\u307f\u3067\u767a\u751f\u3057\u3066\u3044\u308b\u3088\u3046\u306b\u601d\u3048\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u4ed6\u306e\u30b3\u30d4\u30fc \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3082\u540c\u3058\u3088\u3046\u306b\u52d5\u4f5c\u3057\u3066\u304a\u308a\u3001\u30ef\u30fc\u30ab\u30fc\u304c\u95a2\u4e0e\u3057\u306a\u3044\u72b6\u6cc1\u306b\u304a\u3044\u3066\u540c\u69d8\u306e\u30d0\u30b0\u3092\u751f\u3058\u3055\u305b\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3064\u307e\u308a\u3001\u30d0\u30b0\u3092\u5f15\u304d\u8d77\u3053\u3059\u306b\u306f\u3001\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u304c\u5b58\u5728\u3059\u308b\u30d0\u30a4\u30c8\u914d\u5217\u3067\u3001\u30b3\u30d4\u30fc \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u4f7f\u3063\u3066\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u306a\u3057\u306e\u65b0\u3057\u3044\u30d0\u30a4\u30c8\u914d\u5217\u3092\u53d6\u5f97\u3057\u3066\u3001\u5143\u306e\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u306b\u901a\u77e5\u305b\u305a\u306b\u3001\u30b3\u30d4\u30fc\u3057\u305f\u30d0\u30a4\u30c8\u914d\u5217\u3067\u305d\u306e\u914d\u5217\u30dd\u30a4\u30f3\u30bf\u3092(\u30d0\u30a4\u30c8\u914d\u5217\u306e\u5bb9\u91cf\u3092\u8d85\u3048\u305f\u30c7\u30fc\u30bf\u3092\u8ffd\u52a0\u3059\u308b\u306a\u3069\u3057\u3066)\u5909\u66f4\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u3067\u3001\u89e3\u653e\u3055\u308c\u305f\u30d0\u30c3\u30d5\u30a1\u3092\u53c2\u7167\u3057\u307e\u3059\u3002<\/p>\n<h4><b>\u30ef\u30fc\u30ab\u30fc<\/b><\/h4>\n<p>CVE-2015-0313\u304a\u3088\u3073CVE-2015-X\u3092\u6a19\u7684\u3068\u3057\u305f\u5b9f\u4e16\u754c\u306e\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u3067\u306f\u3001\u30ef\u30fc\u30ab\u30fc\u304c\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u524d\u8ff0\u306e\u30b3\u30d4\u30fc \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306b\u95a2\u3059\u308b\u89e3\u8aac\u3067\u306f\u3001\u30ef\u30fc\u30ab\u30fc\u304c\u4f7f\u7528\u3055\u308c\u305f\u7406\u7531\u3092\u3042\u308b\u7a0b\u5ea6\u793a\u3057\u307e\u3057\u305f\u304c\u3001\u8106\u5f31\u306a\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u65b9\u6cd5\u306b\u3064\u3044\u3066\u306f\u307e\u3060\u4f55\u3082\u8aac\u660e\u3057\u3066\u3044\u307e\u305b\u3093\u3002\u30b3\u30fc\u30c9\u3092\u30c8\u30ea\u30ac\u30fc\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u8ff0\u3059\u308b\u524d\u306b\u3001\u307e\u305a\u3001\u65b0\u3057\u3044\u30ef\u30fc\u30ab\u30fc\u3092\u4f5c\u6210\u3057\u3066\u5b9f\u884c\u3057\u305f\u3068\u304d\u306b\u4f55\u304c\u8d77\u304d\u308b\u304b\u8abf\u3079\u3066\u307f\u307e\u3057\u3087\u3046\u3002ActionScript 3 (AS3)\u30b3\u30fc\u30c9\u306e\u6b21\u306e2\u3064\u306e\u884c\u306b\u3064\u3044\u3066\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<div align=\"center\"><img  class=\"aligncenter lozad\"  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_9.png\" \/><\/div>\n<p>AVM\u30bd\u30fc\u30b9 \u30b3\u30fc\u30c9\u306e\u6b21\u306e\u30b3\u30e1\u30f3\u30c8\u306b\u306f\u3001\u554f\u984c\u767a\u751f\u306e\u53ef\u80fd\u6027\u304c\u793a\u5506\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  class=\"aligncenter lozad\"  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_10.png\" \/><\/div>\n<p>\u30ef\u30fc\u30ab\u30fc\u3068\u5b9f\u969b\u306e\u8efd\u91cf\u30b9\u30ec\u30c3\u30c9\u3092\u533a\u5225\u3059\u308b\u3053\u3068\u306e\u91cd\u8981\u6027\u306b\u3064\u3044\u3066\u306f\u5f8c\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/help.adobe.com\/en_US\/FlashPlatform\/reference\/actionscript\/3\/flash\/system\/Worker.html\" data-page-track=\"true\" data-page-track-value=\"company:0623-understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit: section: \">Worker\u30af\u30e9\u30b9\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/a>\u306b\u306f\u3001\u30ef\u30fc\u30ab\u30fc\u306f\u30d0\u30a4\u30c8\u914d\u5217\u304b\u3089\u4f5c\u6210\u3055\u308c\u308b\u3068\u8a18\u8ff0\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u6b21\u306e\u51e6\u7406\u304c\u884c\u308f\u308c\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_11.png\" \/><\/div>\n<p>\u521d\u671f\u5316\u3057\u305f\u5f8c\u306f\u3001\u6b21\u306e\u51e6\u7406\u304c\u884c\u308f\u308c\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  class=\"aligncenter lozad\"  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_12.png\" \/><\/div>\n<p>\u30ef\u30fc\u30ab\u30fc\u7528\u306b\u65b0\u3057\u3044Isolate\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u4f5c\u6210\u3055\u308c\u305f\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u3082\u3046\u4e00\u5ea6\u3001\u8a73\u3057\u304f\u8abf\u3079\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<div align=\"center\"><img  class=\"aligncenter lozad\"  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_13.png\" \/><\/div>\n<p>\u30ef\u30fc\u30ab\u30fc\u306b\u95a2\u9023\u4ed8\u3051\u3089\u308c\u3066\u3044\u308bIsolate\u304cShellIsolate\u30bf\u30a4\u30d7(Isolate\u304b\u3089\u7d99\u627f)\u3067\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>start\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u5b9f\u884c\u3092\u958b\u59cb\u3059\u308b\u3088\u3046\u306b\u30ef\u30fc\u30ab\u30fc\u306b\u8981\u6c42\u3059\u308b\u3068\u3001\u6b21\u306e\u95a2\u6570\u304c\u547c\u3073\u51fa\u3055\u308c\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  class=\"aligncenter lozad\"  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_14.png\" \/><\/div>\n<p>\u3053\u308c\u306b\u3088\u308a\u3001\u65b0\u3057\u3044\u30b9\u30ec\u30c3\u30c9\u304c\u4f5c\u6210\u3055\u308c\u3001\u6b21\u306e\u3088\u3046\u306b\u958b\u59cb\u3055\u308c\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  class=\"aligncenter lozad\"  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_15.png\" \/><\/div>\n<p>Isolate\u306fRunnable\u304b\u3089\u7d99\u627f\u3055\u308c\u308b\u306e\u3067\u3001VMThread\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u3001(Runnable*\u7d4c\u7531\u3067)ShellIsolate\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306em_runnable\u306b\u30dd\u30a4\u30f3\u30bf\u3092\u4fdd\u5b58\u3057\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  class=\"aligncenter lozad\"  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_16.png\" \/><\/div>\n<p>VMThread\u306estart\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u884c\u3057\u305f\u5f8c\u306f\u3001\u6b21\u306e\u51e6\u7406\u304c\u884c\u308f\u308c\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  class=\"aligncenter lozad\"  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_17.png\" \/><\/div>\n<p>\u30cd\u30a4\u30c6\u30a3\u30d6\u306e(\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u56fa\u6709\u306e)\u30b9\u30ec\u30c3\u30c9\u304c\u4f5c\u6210\u3055\u308c\u3001\u305d\u306e\u5b9f\u884c\u5bfe\u8c61\u306fstartInternal\u95a2\u6570\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u95a2\u6570\u306f\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066VMThread\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53d6\u5f97\u3057\u3001\u95a2\u9023\u4ed8\u3051\u3089\u308c\u3066\u3044\u308bIsolate\u304b\u3089run\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  class=\"aligncenter lozad\"  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_18.png\" \/><\/div>\n<p>\u307e\u305f\u3001\u5225\u306e\u5185\u90e8\u95a2\u6570\u304c\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  class=\"aligncenter lozad\"  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_19.png\" \/><\/div>\n<p>\u3053\u308c\u304b\u3089\u304c\u6ce8\u76ee\u7b87\u6240\u3067\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_20.png\" \/><\/div>\n<p>\u3053\u3053\u3067\u306f\u3001\u30ef\u30fc\u30ab\u30fc\u306eIsolate\u7528\u306b\u65b0\u3057\u3044TopLevel\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u4f5c\u6210\u3055\u308c\u305f\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002setup\u95a2\u6570\u306b\u306f\u3001\u6b21\u306e\u884c\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_21.png\" \/><\/div>\n<p>\u306a\u305c\u3053\u308c\u304c\u91cd\u8981\u306a\u306e\u304b\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u3001\u3053\u306eTopLevel\u30af\u30e9\u30b9\u306b\u3064\u3044\u3066\u8abf\u3079\u3066\u307f\u307e\u3057\u3087\u3046\u3002Adobe\u793e\u306e\u8aac\u660e\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<p>\u300c\u6700\u4e0a\u4f4d\u30ec\u30d9\u30eb\u306b\u306f\u3001\u4e2d\u6838\u3068\u306a\u308bActionScript\u30af\u30e9\u30b9\u3068\u30b0\u30ed\u30fc\u30d0\u30eb\u95a2\u6570\u304c\u542b\u307e\u308c\u307e\u3059\u3002\u300d<\/p>\n<p>\u3064\u307e\u308a\u3001TopLevel\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f1\u56de\u3057\u304b\u5b58\u5728\u3057\u306a\u3044\u306f\u305a\u3067\u3059\u3002\u30e1\u30a4\u30f3 \u30b9\u30ec\u30c3\u30c9(\u5143\u306e\u30ef\u30fc\u30ab\u30fc)\u306e\u307f\u306e\u5834\u5408\u306f\u3001\u3053\u306e\u6761\u4ef6\u304c\u5f53\u3066\u306f\u307e\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u65b0\u3057\u3044(\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9)\u30ef\u30fc\u30ab\u30fc\u3092\u4f5c\u6210\u3059\u308b\u5834\u5408\u3001\u305d\u306e\u30ef\u30fc\u30ab\u30fc\u306f\u65b0\u3057\u3044Isolate\u3092\u4f7f\u3063\u3066\u4f5c\u6210\u3055\u308c\u3001\u65b0\u3057\u3044TopLevel\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3082\u4f5c\u6210\u3055\u308c\u307e\u3059\u3002\u524d\u8ff0\u306e\u5f15\u7528\u6587\u3092\u601d\u3044\u51fa\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30ef\u30fc\u30ab\u30fc\u306e\u4f5c\u6210\u3068\u306f\u3001\u74b0\u5883\u306e\u304b\u306a\u308a\u306e\u90e8\u5206\u306e\u500b\u5225\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n<p>\u65b0\u3057\u3044TopLevel\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u30ef\u30fc\u30ab\u30fc\u7528\u306b\u4f5c\u6210\u3055\u308c\u3066\u3044\u308b\u3068\u3044\u3046\u4e8b\u5b9f\u304c\u3001\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u306e\u6210\u5426\u306e\u9375\u3068\u306a\u308a\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u8a00\u3046\u3068\u3001\u65b0\u3057\u3044TopLevel\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u306f\u7a7a\u306e_isolateInternedObjects\u8868\u304c\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u3053\u306e\u8868\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u8106\u5f31\u306a\u30b3\u30fc\u30c9\u3078\u306e\u30a2\u30af\u30bb\u30b9\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3064\u3044\u3066\u306f\u5f8c\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<h3><b>\u8106\u5f31\u6027\u306e\u30c8\u30ea\u30ac\u30fc<\/b><\/h3>\n<p>\u30ef\u30fc\u30ab\u30fc \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4ed5\u7d44\u307f\u306b\u3064\u3044\u3066\u3042\u308b\u7a0b\u5ea6\u7406\u89e3\u3057\u305f\u3089\u3001CVE-2015-X\u306e\u8106\u5f31\u6027\u3092\u30c8\u30ea\u30ac\u30fc\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u3001\u6bb5\u968e\u3054\u3068\u306e\u8a73\u7d30\u306a\u4f8b\u3092\u8003\u616e\u3059\u308b\u6e96\u5099\u304c\u6574\u3044\u307e\u3057\u305f\u3002<\/p>\n<p>\u30b9\u30c6\u30c3\u30d71:\u5171\u6709\u53ef\u80fd\u306aFlash\u306eByteArray\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u3001domainMemory\u306b\u5272\u308a\u5f53\u3066\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_22.png\" \/><\/div>\n<p>AVM\u30bd\u30fc\u30b9\u3067\u306f\u3001\u3053\u306e\u5272\u308a\u5f53\u3066\u306e\u5f71\u97ff\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_23.png\" \/><\/div>\n<p>DomainEnv::globalMemorySubscribe\u3067ByteArray::addSubscriber\u3078\u306e\u547c\u3073\u51fa\u3057\u304c\u751f\u6210\u3055\u308c\u308b\u3068\u304d\u306b\u306f\u3001ba\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5b9f\u969b\u306e\u30c7\u30fc\u30bf\u3092\u4fdd\u6301\u3057\u3066\u3044\u308b\u3001\u57fa\u790e\u3068\u306a\u308b\u30d0\u30c3\u30d5\u30a1\u306b\u5bfe\u3059\u308b\u5909\u66f4\u304c\u901a\u77e5\u3055\u308c\u308b\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u3068\u3057\u3066\u3001domainMemory (\u73fe\u5728\u306e\u30c9\u30e1\u30a4\u30f3)\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_24.png\" \/><\/div>\n<p>\u4e0a\u306e\u7b87\u6240\u3092Windbg\u3067\u30c7\u30d0\u30c3\u30b0\u3057\u3066\u3001ByteArray::addSubscriber (\u30aa\u30d5\u30bb\u30c3\u30c80x66B210)\u3067\u30d6\u30ec\u30fc\u30af\u3059\u308b\u3068\u3001\u6b21\u306e\u3088\u3046\u306b\u51fa\u529b\u3055\u308c\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_25.png\" \/><\/div>\n<p>ecx\u30ec\u30b8\u30b9\u30bf\u306b\u306f\u3001this\u30dd\u30a4\u30f3\u30bf\u304c\u683c\u7d0d\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u30dd\u30a4\u30f3\u30bf\u306f\u3001\u65b0\u3057\u3044\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0(\u73fe\u5728\u306e\u30c9\u30e1\u30a4\u30f3)\u3092\u8ffd\u52a0\u3059\u308bByteArray\u30aa\u30d6\u30b8\u30a7\u30af\u30c8(ba)\u3092\u30dd\u30a4\u30f3\u30c8\u3057\u307e\u3059\u3002ByteArray\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u8208\u5473\u6df1\u3044\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u95a2\u3059\u308b\u8a18\u8ff0\u306e\u3068\u304a\u308a\u3001\u6b21\u306e\u7d50\u679c\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u95a2\u9023\u3059\u308bByteArray::Buffer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u30a2\u30c9\u30ec\u30b90x79D7230 (\u30aa\u30d5\u30bb\u30c3\u30c80x28)\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u30d0\u30a4\u30c8\u914d\u5217\u306f\u5171\u6709\u53ef\u80fd(\u30aa\u30d5\u30bb\u30c3\u30c80x2C)\u3067\u3059\u3002<\/p>\n<p>\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u60c5\u5831\u306f\u3001\u30a2\u30c9\u30ec\u30b90x83050D0 (\u30aa\u30d5\u30bb\u30c3\u30c80x18)\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>ByteArray::Buffer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8abf\u3079\u308b\u3068\u3001\u6b21\u306e\u7d50\u679c\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_26.png\" \/><\/div>\n<p>\u5b9f\u969b\u306e\u30d0\u30a4\u30c8\u914d\u5217\u306f\u30e1\u30e2\u30ea\u5185\u306e\u30a2\u30c9\u30ec\u30b90x8317000 (\u30aa\u30d5\u30bb\u30c3\u30c80x8)\u306b\u5b58\u5728\u3057\u3066\u304a\u308a\u3001\u305d\u306ecapacity (\u30aa\u30d5\u30bb\u30c3\u30c80xC)\u3068length (\u30aa\u30d5\u30bb\u30c3\u30c80x10)\u306f\u30010x1000 (4096\u30d0\u30a4\u30c8)\u3067\u3059\u3002<\/p>\n<p>\u6700\u5f8c\u306b\u3001\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u306eListData\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8abf\u3079\u308b\u3068\u3001\u6b21\u306e\u7d50\u679c\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_27.png\" \/><\/div>\n<p>length\u306f0 (\u30aa\u30d5\u30bb\u30c3\u30c80x4)\u3067\u3042\u308b\u305f\u3081\u3001\u307e\u3060\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u304c\u5b58\u5728\u3057\u306a\u3044\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002addSubscriber\u95a2\u6570\u306e\u6700\u5f8c\u306b\u306f\u65b0\u3057\u3044\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u304c\u5b58\u5728\u3059\u308b\u3088\u3046\u306b\u306a\u308b\u3053\u3068\u3092\u671f\u5f85\u3067\u304d\u307e\u3059\u304c\u3001\u5b9f\u969b\u306b\u305d\u3046\u306a\u308a\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_28.png\" \/><\/div>\n<p>\u30b9\u30c6\u30c3\u30d72:\u5f15\u304d\u7d9a\u304d\u30e1\u30a4\u30f3 \u30b9\u30ec\u30c3\u30c9\u5185\u3067\u30ef\u30fc\u30ab\u30fc\u3092\u4f5c\u6210\u3057\u3001\u30ef\u30fc\u30ab\u30fc\u3068\u5171\u6709\u3059\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u3057\u3066\u3001\u5171\u6709\u53ef\u80fd\u306a\u30d0\u30a4\u30c8\u914d\u5217\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u30ef\u30fc\u30ab\u30fc \u30b9\u30ec\u30c3\u30c9\u3092\u958b\u59cb\u3057\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_29.png\" \/><\/div>\n<p>\u5171\u6709\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u8a2d\u5b9a\u3059\u308b\u30b3\u30fc\u30c9\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_30.png\" \/><\/div>\n<p><a href=\"https:\/\/www.semantiscope.com\/research\/BHDC2010\/BHDC-2010-Paper.pdf\" data-page-track=\"true\" data-page-track-value=\"company:0623-understanding-flash-exploitation-and-the-alleged-cve-2015-0359-exploit: section: \">Dion Blazakis\u306e\u30bb\u30df\u30ca\u30fc\u8cc7\u6599<\/a>\u3067\u8aac\u660e\u3055\u308c\u3066\u3044\u308b\u3068\u304a\u308a\u3001atom\u3068\u306f\u3001\u5b9f\u969b\u306b\u306f\u30bf\u30b0\u4ed8\u3051\u3055\u308c\u305f\u30dd\u30a4\u30f3\u30bf\u306e\u3053\u3068\u3067\u3059\u3002\u30c1\u30e3\u30cd\u30eb \u30a2\u30a4\u30c6\u30e0\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30bf\u30a4\u30d7\u306b\u57fa\u3065\u3044\u3066\u6b21\u306e\u3088\u3046\u306b\u4f5c\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_31.png\" \/><\/div>\n<p>ByteArrayObject\u30af\u30e9\u30b9\u306e\u9069\u5207\u306a\u30e1\u30f3\u30d0\u30fc\u95a2\u6570\u304c\u547c\u3073\u51fa\u3055\u308c\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_32.png\" \/><\/div>\n<p>\u30d0\u30a4\u30c8\u914d\u5217\u306f\u5171\u6709\u53ef\u80fd\u306a\u305f\u3081\u3001\u5171\u6709\u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u3057\u3066\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u30c1\u30e3\u30cd\u30eb \u30a2\u30a4\u30c6\u30e0\u306b\u3088\u3063\u3066ByteArray::Buffer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8(\u3053\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u306f\u5b9f\u969b\u306e\u914d\u5217\u30c7\u30fc\u30bf\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u3001capacity\u3068length\u306a\u3069\u304c\u4fdd\u6301\u3055\u308c\u3066\u3044\u308b)\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u3001\u304a\u3088\u3073\u30d0\u30a4\u30c8\u914d\u5217\u304c\u5171\u6709\u53ef\u80fd\u3067\u3042\u308b\u3068\u3044\u3046\u4e8b\u5b9f\u304c\u4fdd\u5b58\u3055\u308c\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u6ce8\u76ee\u3059\u3079\u304d\u3082\u30461\u3064\u306e\u91cd\u8981\u306a\u4e8b\u5b9f\u306f\u3001intern\u95a2\u6570\u304c\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u305d\u306e\u51e6\u7406\u306b\u3064\u3044\u3066\u8abf\u3079\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_33.png\" \/><\/div>\n<p>m_value\u306f\u3001ChannelItem\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4e00\u90e8\u3068\u3057\u3066\u4fdd\u5b58\u3057\u305f\u3070\u304b\u308a\u306eByteArray::Buffer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3059\u3002\u3053\u308c\u306f\u3001TopLevel\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5185\u306einternObject\u95a2\u6570\u306b\u9001\u4fe1\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u969b\u306b\u306f\u3001\u5f53\u8a72Buffer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u95a2\u9023\u4ed8\u3051\u3089\u308c\u305f(\u3064\u307e\u308a\u3001Buffer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4fdd\u6301\u3057\u3066\u3044\u308b)ByteArrayObject\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u3082\u4e00\u7dd2\u306b\u9001\u4fe1\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u95a2\u9023\u4ed8\u3051\u306f\u3001TopLevel\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u3088\u3063\u3066\u6b21\u306e\u3088\u3046\u306b\u5185\u90e8\u4fdd\u5b58\u3055\u308c\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_34.png\" \/><\/div>\n<p>\u3057\u305f\u304c\u3063\u3066\u3001key\u306fBuffer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3078\u306e\u53c2\u7167\u306b\u3001value\u306fByteArrayObject\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3078\u306e\u53c2\u7167\u306b\u306a\u308a\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u30ef\u30fc\u30ab\u30fc\u7528\u306e\u30d0\u30a4\u30c8\u914d\u5217\u3067\u5171\u6709\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u8a2d\u5b9a\u3059\u308b\u3068\u3001\u5bfe\u5fdc\u3059\u308bByteArrayObject\u53c2\u7167\u306e\u53d6\u5f97\u30ad\u30fc\u3068\u3057\u3066\u3001TopLevel\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u7d4c\u7531\u3067\u305d\u306e\u914d\u5217\u306eByteArray::Buffer\u53c2\u7167\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u30c1\u30e3\u30cd\u30eb \u30a2\u30a4\u30c6\u30e0\u306b\u306fBuffer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3078\u306e\u53c2\u7167\u3068\u3001\u5171\u6709\u53ef\u80fd\u306a\u30d0\u30a4\u30c8\u914d\u5217\u304b\u3069\u3046\u304b\u306e\u5224\u5b9a\u306e\u307f\u304c\u4fdd\u5b58\u3055\u308c\u307e\u3059\u3002\u3055\u3089\u306b\u3001TopLevel\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u30ef\u30fc\u30ab\u30fc\u3054\u3068\u306b\u56fa\u6709\u306a\u3082\u306e\u3067\u3042\u308b\u3053\u3068\u3092\u601d\u3044\u51fa\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u305d\u306e\u305f\u3081\u3001\u3053\u306e\u95a2\u9023\u4ed8\u3051\u306f\u73fe\u5728\u306e\u30ef\u30fc\u30ab\u30fc(\u3053\u306e\u5834\u5408\u306f\u5143\u306e\u30ef\u30fc\u30ab\u30fc)\u306b\u306e\u307f\u8a72\u5f53\u3059\u308b\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>\u30b9\u30c6\u30c3\u30d73:\u30ef\u30fc\u30ab\u30fc \u30b9\u30ec\u30c3\u30c9\u3067\u3001\u5171\u6709\u3055\u308c\u3066\u3044\u308b\u30d0\u30a4\u30c8\u914d\u5217\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_35.png\" \/><\/div>\n<p>\u3053\u306e\u6642\u70b9\u3067AVM\u30bd\u30fc\u30b9 \u30b3\u30fc\u30c9\u3092\u8ffd\u8de1\u3059\u308b\u3068\u3001\u8106\u5f31\u6027\u306e\u6839\u672c\u7684\u306a\u539f\u56e0\u306b\u884c\u304d\u7740\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u307e\u305a\u3001\u5171\u6709\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304b\u3089\u59cb\u3081\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_36.png\" \/><\/div>\n<p>\u3053\u308c\u306b\u3088\u308a\u3001Isolate::getSharedProperty\u306e\u6b21\u306e\u30b3\u30fc\u30c9\u65ad\u7247\u304c\u898b\u3064\u304b\u308a\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_37.png\" \/><\/div>\n<p>\u3057\u305f\u304c\u3063\u3066\u3001\u6587\u5b57\u5217ba\u306f\u3001\u30b9\u30c6\u30c3\u30d72\u3067\u4fdd\u5b58\u3057\u305fChannelItem\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3078\u306e\u5bfe\u5fdc\u3059\u308b\u53c2\u7167\u3092\u30d5\u30a7\u30c3\u30c1\u3059\u308b\u305f\u3081\u306e\u30ad\u30fc\u3068\u3057\u3066\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u7d9a\u3044\u3066\u3001getAtom\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066ChannelItem\u3092Atom\u306b\u5909\u63db\u3057\u307e\u3059\u3002\u305d\u306e\u969b\u306b\u306f\u3001\u4ee5\u524d\u306b\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u53d6\u5f97\u3057\u305fTopLevel\u53c2\u7167(\u524d\u8ff0\u306e\u30b3\u30fc\u30c9\u65ad\u7247\u3092\u53c2\u7167)\u3092\u3001\u5f15\u6570\u3068\u3057\u3066\u6e21\u3057\u307e\u3059\u3002<\/p>\n<p>getAtom\u95a2\u6570\u306e\u5b58\u5728\u306f\u3001\u8106\u5f31\u6027\u306e\u767a\u751f\u306e\u524d\u89e6\u308c\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u95a2\u6570\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u59cb\u307e\u308a\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_38.png\" \/><\/div>\n<p>m_value\u306f\u3001ChannelItem\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089\u53d6\u5f97\u3057\u305fByteArray::Buffer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3078\u306e\u53c2\u7167\u3067\u3042\u308a\u3001\u3053\u3053\u3067\u306f\u3001\u305d\u308c\u306b\u95a2\u9023\u4ed8\u3051\u3089\u308c\u305fByteArrayObject\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u691c\u7d22\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_39.png\" \/><\/div>\n<p>\u30b9\u30c6\u30c3\u30d72\u3067\u306f\u3001\u8a72\u5f53\u3059\u308b\u95a2\u9023\u4ed8\u3051\u3092_isolateInternedObjects\u8868\u306b\u4fdd\u5b58\u3057\u307e\u3057\u305f\u304c\u3001\u3053\u308c\u306f\u5143\u306e\u30ef\u30fc\u30ab\u30fc\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u884c\u308f\u308c\u305f\u51e6\u7406\u3067\u3057\u305f\u3002\u4eca\u56de\u306f\u3001\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9 \u30ef\u30fc\u30ab\u30fc\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306b\u3042\u308b\u305f\u3081\u3001\u72ec\u81ea\u306eTopLevel\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u7a7a\u306e_isolateInternedObjects\u8868\u304c\u5b58\u5728\u3057\u307e\u3059\u3002\u3064\u307e\u308a\u3001getInternedObject\u306b\u3088\u3063\u3066NULL\u304c\u8fd4\u3055\u308c\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u5143\u306e\u30ef\u30fc\u30ab\u30fc\u3067\u307e\u3063\u305f\u304f\u540c\u3058\u547c\u3073\u51fa\u3057\u3092\u884c\u3063\u305f\u5834\u5408\u3001\u5171\u6709\u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u3057\u3066\u8a2d\u5b9a\u3057\u305f\u3082\u306e\u3068\u307e\u3063\u305f\u304f\u540c\u3058ByteArrayObject\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u53d6\u5f97\u3055\u308c\u3066\u3001\u6709\u52b9\u306a\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0 \u30ea\u30b9\u30c8\u3082\u5b58\u5728\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>getAtom\u306e\u4f8b\u306b\u623b\u308b\u3068\u3001\u8106\u5f31\u306a\u30b3\u30d4\u30fc \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u547c\u3073\u51fa\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u660e\u78ba\u306b\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_40.png\" \/><\/div>\n<p>\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9 \u30ef\u30fc\u30ab\u30fc\u306b\u306f\u3001\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u306a\u3057\u306eByteArrayObject\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3078\u306e\u53c2\u7167\u304c\u3042\u308b\u3053\u3068\u3092\u660e\u8a18\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u5143\u306e\u30ef\u30fc\u30ab\u30fc\u306b\u304a\u3051\u308b\u6700\u521d\u306eByteArrayObject\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u53c2\u7167\u3057\u3066\u3044\u308b\u306e\u3068\u307e\u3063\u305f\u304f\u540c\u3058ByteArray::Buffer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53c2\u7167\u3057\u307e\u3059\u3002\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\u3067\u306f\u3001\u305d\u306e\u3053\u3068\u306e\u78ba\u8a3c\u304c\u5f97\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>\u30b9\u30c6\u30c3\u30d74:\u30ef\u30fc\u30ab\u30fc \u30b9\u30ec\u30c3\u30c9\u3067\u3001\u5171\u6709\u3055\u308c\u3066\u3044\u308b\u30d0\u30a4\u30c8\u914d\u5217\u306b\u30d0\u30a4\u30c8\u3092\u8ffd\u52a0\u3057\u3066\u3001\u305d\u306ecapacity\u306e\u53d7\u3051\u6e21\u3057\u3068\u3001\u57fa\u790e\u3068\u306a\u308b\u30d0\u30c3\u30d5\u30a1\u306e\u518d\u5272\u308a\u5f53\u3066\u3092\u5f37\u5236\u7684\u306b\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_41.png\" \/><\/div>\n<p>writeBytes\u30b3\u30de\u30f3\u30c9\u306e\u5b9f\u884c\u306b\u3088\u308a\u3001domainMemory\u3078\u306e\u901a\u77e5\u306a\u3057\u306b\u30dd\u30a4\u30f3\u30bf\u304c\u89e3\u653e\u3055\u308c\u307e\u3059(\u3053\u308c\u306b\u3088\u308a\u3001\u3088\u308a\u5927\u304d\u306a\u914d\u5217\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u308b)\u3002\u95a2\u6570\u306e\u5b9f\u884c\u524d\u306e\u30d0\u30a4\u30c8\u914d\u5217\u72b6\u614b\u306e\u8abf\u67fb\u3092\u884c\u3046\u524d\u306b\u3001\u30d0\u30a4\u30c8\u914d\u5217\u306bdomainMemory\u3092\u8a2d\u5b9a\u3057\u305f\u5f8c\u306e\u5143\u306e\u30ef\u30fc\u30ab\u30fc\u306e\u5024\u304c\u4f55\u3067\u3042\u3063\u305f\u304b\u3092\u601d\u3044\u51fa\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>ByteArray\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u30a2\u30c9\u30ec\u30b90x7A8F938\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>ByteArray::Buffer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u30a2\u30c9\u30ec\u30b90x79D7230\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u30d0\u30a4\u30c8\u914d\u5217\u306f\u5171\u6709\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<p>\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u3092\u8a18\u8ff0\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u30a2\u30c9\u30ec\u30b90x83050D0\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>1\u3064\u306e\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0(\u73fe\u5728\u306e\u30c9\u30e1\u30a4\u30f3)\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u3001\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9 \u30ef\u30fc\u30ab\u30fc\u306ewriteBytes\u547c\u3073\u51fa\u3057\u306b\u623b\u308a\u307e\u3059\u3002\u3053\u306e\u547c\u3073\u51fa\u3057\u306f\u3001UAF\u8106\u5f31\u6027\u306e\u300c\u81ea\u7531\u306a\u300d\u90e8\u5206\u306b\u4f5c\u7528\u3057\u307e\u3059\u3002ByteArrayObject::writeBytes\u306fDataOutput::WriteByteArray\u3092\u547c\u3073\u51fa\u3057\u3001DataOutput::WriteByteArray\u306f\u5f8c\u3067ByteArray::Write\u3092\u547c\u3073\u51fa\u3057\u307e\u3059\u3002\u5148\u307b\u3069\u8ff0\u3079\u305f\u4ed6\u306e\u3069\u306e\u95a2\u6570\u3067\u30d6\u30ec\u30fc\u30af\u3057\u3066\u3082\u826f\u3044\u306e\u3067\u3059\u304c\u3001\u3053\u3053\u3067\u306f\u3001DataOutput::WriteByteArray (\u30aa\u30d5\u30bb\u30c3\u30c80x6A1F10)\u3067\u30d6\u30ec\u30fc\u30af\u3057\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/gal_42.png\" \/><\/div>\n<p>ecx\u30ec\u30b8\u30b9\u30bf\u306b\u306fthis\u30dd\u30a4\u30f3\u30bf\u304c\u4fdd\u6301\u3055\u308c\u3066\u304a\u308a\u3001\u3053\u306e\u5834\u5408\u3001\u3053\u306e\u30dd\u30a4\u30f3\u30bf\u306f\u3001ByteArray\u30aa\u30d6\u30b8\u30a7\u30af\u30c8(\u30aa\u30d5\u30bb\u30c3\u30c80x8)\u5185\u306eDataOutput\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30dd\u30a4\u30f3\u30c8\u3057\u3066\u3044\u307e\u3059\u3002\u5143\u306e\u5404\u5024\u3068\u6bd4\u8f03\u3057\u3066\u307f\u308b\u3068\u3001\u6b21\u306e\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>ByteArray\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u30a2\u30c9\u30ec\u30b90x8B0FF10 (0x8B0FF18 \u2013 0x8)\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>ByteArray::Buffer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u30a2\u30c9\u30ec\u30b90x79D7230 (DataOutput\u304b\u3089\u30aa\u30d5\u30bb\u30c3\u30c80x20\u3092\u53c2\u7167)\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u30d0\u30a4\u30c8\u914d\u5217\u306f\u5171\u6709\u53ef\u80fd(\u30aa\u30d5\u30bb\u30c3\u30c80x24)\u3067\u3059\u3002<\/p>\n<p>\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u3092\u8a18\u8ff0\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u30a2\u30c9\u30ec\u30b90x8BE2280 (\u30aa\u30d5\u30bb\u30c3\u30c80x10)\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3057\u305f\u304c\u3063\u3066\u3001\u3053\u308c\u306f\u3001\u65b0\u3057\u3044\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0 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\/><\/div>\n<p>\u65b0\u3057\u3044ByteArray\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u306f\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0(\u30aa\u30d5\u30bb\u30c3\u30c80x4)\u304c\u306a\u3044\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001domainMemory\u306f\u3001\u3053\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c(Buffer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u7d4c\u7531\u3067)\u30dd\u30a4\u30f3\u30c8\u3057\u3066\u3044\u308b\u5b9f\u969b\u306e\u30d0\u30a4\u30c8\u914d\u5217\u306b\u30ed\u30fc(raw)\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u3001writeBytes\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30d0\u30c3\u30d5\u30a1\u306e\u5bb9\u91cf\u3092\u8d85\u3048\u308b\u66f8\u304d\u8fbc\u307f\u3092\u884c\u3063\u305f\u3053\u3068\u306b\u3088\u308a\u3001\u518d\u5272\u308a\u5f53\u3066\u3068\u30e1\u30e2\u30ea\u5185\u306e\u4f4d\u7f6e\u5909\u66f4\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u3001domainMemory\u306b\u306f\u305d\u306e\u3053\u3068\u304c\u901a\u77e5\u3055\u308c\u306a\u3044\u305f\u3081\u3001\u89e3\u653e\u6e08\u307f\u306e\u30d0\u30a4\u30c8\u914d\u5217\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u304c\u4fdd\u6301\u3055\u308c\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306f\u3001\u5b9f\u969b\u306b\u547c\u3073\u51fa\u3055\u308c\u3066\u3082\u3001\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0 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