{"id":42589,"date":"2017-09-19T11:39:28","date_gmt":"2017-09-19T18:39:28","guid":{"rendered":"https:\/\/www.paloaltonetworks.com\/blog\/?p=42589"},"modified":"2017-09-20T20:17:51","modified_gmt":"2017-09-21T03:17:51","slug":"unit42-threat-brief-patch-today-dont-get-burned-android-toast-overlay-attack","status":"publish","type":"post","link":"https:\/\/origin-researchcenter.paloaltonetworks.com\/blog\/2017\/09\/unit42-threat-brief-patch-today-dont-get-burned-android-toast-overlay-attack\/?lang=zh-hant","title":{"rendered":"\u5a01\u8105\u6458\u8981\uff1a\u7acb\u5373\u4fee\u88dc\u554f\u984c\uff0c\u4ee5\u514d\u53d7\u5230 Android Toast \u8986\u84cb\u7684\u653b\u64ca"},"content":{"rendered":"<p>Palo Alto Networks Unit 42 \u7684\u7814\u7a76\u4eba\u54e1\u65bc\u4eca\u65e5\u516c\u4f48\u6703\u5f71\u97ff Google Android \u5e73\u53f0\u7684\u5168\u65b0\u9ad8\u56b4\u91cd\u6027\u5f31\u9ede\u4e4b<a href=\"https:\/\/www.paloaltonetworks.com\/blog\/2017\/09\/unit42-android-toast-overlay-attack-cloak-and-dagger-with-no-permissions\/\">\u8a73\u7d30\u8cc7\u8a0a<\/a>\u3002\u9019\u4e00\u5f31\u9ede\u7684\u4fee\u88dc\u7a0b\u5f0f\u5df2\u4f5c\u70ba<a href=\"https:\/\/source.android.com\/security\/bulletin\/2017-09-01\" rel=\"nofollow,noopener\" > Android 2017 \u5e74 9 \u6708\u5b89\u5168\u544a\u793a<\/a>\u7684\u4e00\u90e8\u4efd\u63d0\u4f9b\u3002\u9019\u9805\u65b0\u7684\u5f31\u9ede\u300c\u4e26\u4e0d\u6703\u300d\u5f71\u97ff\u6700\u65b0\u7248\u672c\u7684 <a href=\"https:\/\/www.android.com\/versions\/oreo-8-0\/\" rel=\"nofollow,noopener\" >Android 8.0 Oreo<\/a>\uff0c\u4f46\u662f\u6703\u5f71\u97ff\u820a\u7248\u672c\u7684 Android\u3002\u6709\u4e9b\u60e1\u610f\u8edf\u9ad4\u6703\u4ee5\u672c\u7bc7\u6587\u7ae0\u4e2d\u6240\u63d0\u53ca\u7684\u9014\u5f91\u767c\u8d77\u653b\u64ca\uff0c\u4f46 Palo Alto Networks Unit 42 \u76ee\u524d\u4e26\u672a\u767c\u73fe\u4efb\u4f55\u91dd\u5c0d\u6b64\u7279\u5b9a\u5f31\u9ede\u7684\u653b\u64ca\u51fa\u73fe\u3002\u7531\u65bc Android 8.0 \u662f\u76f8\u5c0d\u8f03\u65b0\u7684\u7248\u672c\uff0c\u9019\u8868\u793a\u5e7e\u4e4e\u6240\u6709\u7684 Android \u4f7f\u7528\u8005\u90fd\u61c9\u8a72\u7acb\u5373\u63a1\u53d6\u884c\u52d5\u4ee5\u5957\u7528\u66f4\u65b0\u9805\u76ee\uff0c\u624d\u80fd\u61c9\u5c0d\u9019\u9805\u5f31\u9ede\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u6211\u5011\u7684\u7814\u7a76\u4eba\u54e1\u767c\u73fe\u4e00\u9805\u53ef\u4ee5\u7528\u4f86\u66f4\u8f15\u9b06\u5730\u767c\u52d5\u300c\u8986\u84cb\u653b\u64ca\u300d\u7684\u5f31\u9ede\uff1b\u9019\u985e\u653b\u64ca\u662f Android \u5e73\u53f0\u4e0a\u5df2\u77e5\u7684\u653b\u64ca\u985e\u578b\u3002\u9019\u4e00\u985e\u578b\u7684\u653b\u64ca\u6700\u6709\u53ef\u80fd\u7528\u4f86\u5728\u4f7f\u7528\u8005\u7684 Android \u88dd\u7f6e\u4e0a\u5b89\u88dd\u60e1\u610f\u8edf\u9ad4\uff0c\u5b83\u4e5f\u53ef\u4ee5\u7528\u4f86\u8b93\u60e1\u610f\u8edf\u9ad4\u53d6\u5f97\u88dd\u7f6e\u7684\u5168\u90e8\u63a7\u5236\u6b0a\u3002\u5728\u6700\u7cdf\u7cd5\u7684\u653b\u64ca\u60c5\u5883\u4e0b\uff0c\u9019\u9805\u5f31\u9ede\u53ef\u7528\u4f86\u8b93\u624b\u6a5f\u5b8c\u5168\u5931\u53bb\u4f5c\u7528 (\u4ea6\u5373\u300c\u8b8a\u78da\u300d)\uff0c\u6216\u662f\u7528\u4f86\u5b89\u88dd\u4efb\u4f55\u985e\u578b\u7684\u60e1\u610f\u8edf\u9ad4\uff0c\u5305\u542b\u4f46\u4e0d\u9650\u65bc\u52d2\u7d22\u8edf\u9ad4\u6216\u8cc7\u8a0a\u7aca\u53d6\u7a0b\u5f0f\u3002\u5c31\u6700\u7c21\u55ae\u7684\u5c64\u9762\u800c\u8a00\uff0c\u5728\u653b\u64ca\u6210\u529f\u5f8c\uff0c\u9019\u9805\u5f31\u9ede\u53ef\u4ee5\u7528\u4f86\u53d6\u5f97\u88dd\u7f6e\u63a7\u5236\u6b0a\u3001\u9396\u5b9a\u88dd\u7f6e\u4ee5\u53ca\u7aca\u53d6\u8cc7\u6599\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u300c\u8986\u84cb\u653b\u64ca\u300d\u9019\u7a2e\u653b\u64ca\u65b9\u5f0f\uff0c\u662f\u6307\u653b\u64ca\u8005\u7684\u61c9\u7528\u6703\u5728\u5176\u4ed6\u8996\u7a97\u6216\u5728\u88dd\u7f6e\u4e0a\u57f7\u884c\u7684\u61c9\u7528\u4e4b\u4e0a\u65b9\u7e6a\u88fd (\u6216\u300c\u8986\u84cb\u300d) \u4e00\u500b\u8996\u7a97\u3002\u82e5\u6210\u529f\u9032\u884c\u9019\u9805\u52d5\u4f5c\uff0c\u653b\u64ca\u8005\u4fbf\u80fd\u5920\u8aa4\u5c0e\u4f7f\u7528\u8005\uff0c\u4f7f\u5176\u8a8d\u70ba\u81ea\u5df1\u662f\u5c0d\u4e00\u500b\u8996\u7a97\u9032\u884c\u9ede\u6309\u52d5\u4f5c\uff0c\u800c\u5be6\u969b\u4e0a\u6309\u7684\u662f\u53e6\u4e00\u500b\u8996\u7a97\u3002\u5728\u57161 \u4e2d\uff0c\u60a8\u53ef\u4ee5\u770b\u5230\u4e00\u500b\u4f8b\u5b50\uff1a\u653b\u64ca\u8005\u8b93\u4f7f\u7528\u8005\u4ee5\u70ba\u81ea\u5df1\u8981\u5b89\u88dd\u4fee\u88dc\u7a0b\u5f0f\uff0c\u5be6\u969b\u4e0a\u662f\u6309\u4e0b\u6388\u4e88 Porn Droid \u9019\u500b\u60e1\u610f\u8edf\u9ad4\u5b8c\u6574\u7ba1\u7406\u54e1\u6b0a\u9650\u7684\u6309\u9215\u3002<\/p>\n<p><div style=\"max-width:100%\" data-width=\"623\"><span class=\"ar-custom\" style=\"padding-bottom:94.06%;\"><img loading=\"lazy\" decoding=\"async\"  class=\"alignnone size-full wp-image-41809 lozad\"  data-src=\"https:\/\/www.paloaltonetworks.com\/blog\/wp-content\/uploads\/2017\/09\/AndroidToast_7.png\" alt=\"AndroidToast_7\" width=\"623\" height=\"586\" \/><\/span><\/div><\/p>\n<p>\u5716 1\uff1a\u507d\u9020\u7684\u4fee\u88dc\u5b89\u88dd\u7a0b\u5f0f\u6240\u8986\u84cb\u7684\u60e1\u610f\u8edf\u9ad4\u6b63\u5728\u8981\u6c42\u53d6\u5f97\u7ba1\u7406\u6b0a\u9650<\/p>\n<p>&nbsp;<\/p>\n<p>\u60a8\u53ef\u4ee5\u770b\u5230\u9019\u500b\u653b\u64ca\u6703\u5982\u4f55\u7528\u4f86\u8aaa\u670d\u4f7f\u7528\u8005\uff0c\u4e0d\u77e5\u4e0d\u89ba\u9593\u4fbf\u5728\u88dd\u7f6e\u4e0a\u5b89\u88dd\u4e86\u60e1\u610f\u8edf\u9ad4\u3002\u9019\u4e5f\u53ef\u4ee5\u7528\u4f86\u5411\u60e1\u610f\u8edf\u9ad4\u6388\u4e88\u88dd\u7f6e\u7684\u5b8c\u6574\u7ba1\u7406\u6b0a\u9650\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u900f\u904e\u5728\u88dd\u7f6e\u4e0a\u958b\u555f\u7121\u6cd5\u95dc\u9589\u7684\u8996\u7a97\uff0c\u8986\u84cb\u653b\u64ca\u4e5f\u80fd\u7528\u4f86\u5728\u88dd\u7f6e\u4e0a\u767c\u52d5\u963b\u65b7\u670d\u52d9\u72c0\u6cc1\u3002\u653b\u64ca\u8005\u6703\u4f7f\u7528\u9019\u500b\u65b9\u6cd5\uff0c\u5728\u884c\u52d5\u88dd\u7f6e\u4e0a\u767c\u52d5\u52d2\u7d22\u8edf\u9ad4\u653b\u64ca\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u7576\u7136\uff0c\u8986\u84cb\u653b\u64ca\u80fd\u5920\u7528\u4f86\u5728\u55ae\u4e00\u653b\u64ca\u4e8b\u4ef6\u4e2d\u9054\u6210\u4ee5\u4e0b\u5168\u90e8\u4e09\u500b\u76ee\u6a19\uff1a<\/p>\n<ol>\n<li>\u6b3a\u9a19\u4f7f\u7528\u8005\u5728\u88dd\u7f6e\u4e0a\u5b89\u88dd\u60e1\u610f\u8edf\u9ad4\u3002<\/li>\n<li>\u6b3a\u9a19\u4f7f\u7528\u8005\u5c0d\u60e1\u610f\u8edf\u9ad4\u6388\u4e88\u5b8c\u6574\u7684\u7ba1\u7406\u6b0a\u9650\u3002<\/li>\n<li>\u4f7f\u7528\u8986\u84cb\u653b\u64ca\u4f86\u9396\u5b9a\u88dd\u7f6e\uff0c\u4e26\u900f\u904e\u5176\u52d2\u7d22\u8d16\u91d1\u3002<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<p>\u8986\u84cb\u653b\u64ca\u4e26\u975e\u65b0\u51fa\u73fe\uff0c\u5148\u524d\u4fbf\u66fe\u5f15\u8d77\u904e\u95dc\u6ce8\u3002\u4f46\u5728\u6b64\u4e4b\u524d\uff0c\u6839\u64da <a href=\"http:\/\/iisp.gatech.edu\/sites\/default\/files\/documents\/ieee_sp17_cloak_and_dagger_final.pdf\" rel=\"nofollow,noopener\" >IEEE \u5b89\u5168\u8207\u96b1\u79c1\u671f\u520a<\/a>\u4e2d\u7684\u6700\u65b0\u7814\u7a76\uff0c\u6240\u6709\u4eba\u90fd\u76f8\u4fe1\u8a66\u5716\u9032\u884c\u8986\u84cb\u653b\u64ca\u7684\u60e1\u610f\u61c9\u7528\u5fc5\u9808\u8981\u514b\u670d\u5169\u9805\u91cd\u8981\u7684\u969c\u7919\uff0c\u4e4b\u5f8c\u624d\u80fd\u6210\u529f\uff1a<\/p>\n<p>&nbsp;<\/p>\n<ol>\n<li>\u9019\u4e9b\u61c9\u7528\u5fc5\u9808\u5728\u5b89\u88dd\u6642\u660e\u78ba\u5411\u4f7f\u7528\u8005\u8981\u6c42\u300cdraw on top\u300d\u6b0a\u9650\u3002<\/li>\n<li>\u9019\u4e9b\u61c9\u7528\u5fc5\u9808\u5f9e Google Play \u9032\u884c\u5b89\u88dd\u3002<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<p>\u9019\u4e9b\u56e0\u7d20\u80fd\u5920\u660e\u986f\u964d\u4f4e\u98a8\u96aa\uff0c\u56e0\u6b64\u8986\u84cb\u653b\u64ca\u4e26\u672a\u88ab\u8a8d\u70ba\u662f\u7a2e\u56b4\u91cd\u7684\u5a01\u8105\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u4f46\u662f\uff0c\u6839\u64da Unit 42 \u7684\u5168\u65b0\u7814\u7a76\u986f\u793a\uff0c\u6709\u7a2e\u65b9\u5f0f\u80fd\u5920\u7528\u4f86\u9032\u884c\u8986\u84cb\u653b\u64ca\uff0c\u8b93\u9019\u4e9b\u6e1b\u7de9\u56e0\u7d20\u7121\u6cd5\u9069\u7528\u3002\u82e5\u67d0\u500b\u60e1\u610f\u61c9\u7528\u8981\u5229\u7528\u9019\u9805\u5168\u65b0\u7684\u5f31\u9ede\uff0c\u6211\u5011\u7684\u7814\u7a76\u4eba\u54e1\u767c\u73fe\uff0c\u53ea\u8981\u5728\u88dd\u7f6e\u4e0a\u9762\u5b89\u88dd\u8a72\u985e\u61c9\u7528\uff0c\u4fbf\u80fd\u767c\u52d5\u8986\u84cb\u653b\u64ca\u3002\u9019\u8868\u793a\uff0c\u60e1\u610f\u61c9\u7528\u5373\u4fbf\u4e0d\u662f\u4f86\u81ea Google Play\uff0c\u800c\u662f\u4f86\u81ea\u5176\u4ed6\u7db2\u7ad9\u8207\u61c9\u7528\u5546\u5e97\uff0c\u4e5f\u80fd\u9032\u884c\u8986\u84cb\u653b\u64ca\u3002\u6709\u4ef6\u61c9\u6ce8\u610f\u7684\u91cd\u8981\u4e8b\u9805\u662f\uff0c\u4f86\u81ea Google Play \u4ee5\u5916\u7684\u7db2\u7ad9\u8207\u61c9\u7528\u5546\u5e97\u7684\u61c9\u7528\uff0c\u5728\u4e16\u754c\u5404\u5730\u69cb\u6210\u4e86 Android \u60e1\u610f\u8edf\u9ad4\u7684\u4e00\u500b\u91cd\u5927\u4f86\u6e90\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u9019\u9805\u6703\u5f71\u97ff Android \u529f\u80fd\u7684\u7279\u5b9a\u5f31\u9ede\u88ab\u7a31\u70ba\u300c<a href=\"https:\/\/developer.android.com\/guide\/topics\/ui\/notifiers\/toasts.html\" rel=\"nofollow,noopener\" >Toast<\/a>\u300d(\u5410\u53f8)\u3002\u300cToast\u300d\u662f\u6703\u5728\u87a2\u5e55\u4e0a\u300c\u5f48\u73fe\u300d(\u5c31\u50cf\u70e4\u5410\u53f8) \u7684\u901a\u77e5\u8996\u7a97\u985e\u578b\u4e4b\u4e00\u3002\u300cToast\u300d\u901a\u5e38\u6703\u7528\u4f86\u5728\u5176\u4ed6\u61c9\u7528\u4e0a\u65b9\u986f\u793a\u8a0a\u606f\u8207\u901a\u77e5\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u4e0d\u50cf\u5176\u4ed6\u7684 Android \u8996\u7a97\u985e\u578b\uff0cToast \u4e26\u4e0d\u6703\u8981\u6c42\u76f8\u540c\u7684\u6b0a\u9650\uff0c\u56e0\u6b64\u9069\u7528\u65bc\u5148\u524d\u7684\u8986\u84cb\u653b\u64ca\u4e4b\u6e1b\u7de9\u56e0\u7d20\uff0c\u5728\u9019\u88e1\u4e26\u4e0d\u9069\u7528\u3002\u53e6\u5916\uff0c\u6211\u5011\u7684\u7814\u7a76\u4eba\u54e1\u5df2\u63cf\u8ff0\u5982\u4f55\u53ef\u4ee5\u5efa\u7acb\u8986\u84cb\u6574\u500b\u87a2\u5e55\u7684 Toast \u8996\u7a97\uff0c\u9032\u800c\u80fd\u5920\u4f7f\u7528 Toast 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