{"id":54744,"date":"2018-03-04T09:00:03","date_gmt":"2018-03-04T01:00:03","guid":{"rendered":"https:\/\/blog.trendmicro.com.tw\/?p=54744"},"modified":"2018-03-06T15:15:37","modified_gmt":"2018-03-06T07:15:37","slug":"cloudflare%e5%92%8c-github-%e6%88%90%e7%82%ba%e6%96%b0ddos-%e6%94%be%e5%a4%a7%e6%94%bb%e6%93%8a%e5%8f%97%e5%ae%b3%e8%80%85-%e6%94%bb%e6%93%8a%e8%a6%8f%e6%a8%a1%e7%82%bamirai%e6%94%bb%e6%93%8a%e5%85%a9","status":"publish","type":"post","link":"https:\/\/blog.trendmicro.com.tw\/?p=54744","title":{"rendered":"Cloudflare\u548c Github \u6210\u70ba\u65b0DDoS \u653e\u5927\u653b\u64ca\u53d7\u5bb3\u8005 \u653b\u64ca\u898f\u6a21\u70baMirai\u653b\u64ca\u5169\u500d"},"content":{"rendered":"<p><img decoding=\"async\" class=\"alignleft\" src=\"https:\/\/blog.trendmicro.com\/wp-content\/uploads\/2017\/01\/ransomware-response-study-showcase_image-4-w-1151-300x181.jpg\" \/>\u5728\u904e\u53bb\u5e7e\u5929\u51fa\u73fe\u4e86\u4e00\u7a2e\u65b0\u7684<a href=\"https:\/\/blog.trendmicro.com.tw\/?p=16497\">\u5206\u6563\u5f0f\u963b\u65b7\u670d\u52d9\uff08DDoS\uff09<\/a>\u653e\u5927\u653b\u64ca\uff0c\u800c\u4e14\u5b83\u6709\u6f5b\u529b\u9020\u6210\u6bd4\u904e\u53bb\u90fd\u66f4\u56b4\u91cd\u7684DDoS\u653b\u64ca\u3002\u96d6\u7136\u5927\u591a\u6578\u4eba\u60f3\u5230DDoS\u6240\u7528\u7684\u7db2\u8def\u5354\u5b9a\u6642\u6703\u60f3\u5230DNS\u3001UpNP\/SDP\u548cNTP\uff0c\u4f46\u00a0<strong>mecache<\/strong>\u6240\u9020\u6210\u7684\u653b\u64ca\u8ddf\u5229\u7528\u9019\u4e9b\u5354\u5b9a\u4e00\u6a23\u6709\u6548\u3002<a href=\"https:\/\/github.com\/memcached\/memcached\/blob\/master\/doc\/protocol.txt\">Memcache<\/a>\u662f\u4e00\u7a2e\u53ef\u4ee5\u5f9e\u4f3a\u670d\u5668\u5feb\u901f\u5132\u5b58\u548c\u6aa2\u7d22\u8cc7\u6599\u7684\u5354\u5b9a\uff0c\u800c\u4e0d\u6703\u9020\u6210\u5f8c\u7aef\u8cc7\u6599\u5eab\u6c88\u91cd\u7684\u8ca0\u64d4\u3002\u4e0d\u5e78\u7684\u662f\uff0c\u6700\u8fd1\u5b83\u4e5f\u6210\u70ba\u4e86DDoS\u653b\u64ca\u4e00\u7a2e\u6709\u6548\u7684\u653e\u5927\u548c\u53cd\u5c04\u4f86\u6e90\u3002<\/p>\n<p><a href=\"https:\/\/blog.cloudflare.com\/memcrashed-major-amplification-attacks-from-port-11211\/\">Cloudflare<\/a>\u548c<a href=\"https:\/\/githubengineering.com\/ddos-incident-report\/\">Github<\/a>\u5728\u904e\u53bb\u5e7e\u5929\u6210\u70ba\u4e86\u9019\u7a2e\u65b0DDoS \u653e\u5927\u653b\u64ca\u7684\u7b2c\u4e00\u6ce2\u53d7\u5bb3\u8005\u3002\u5728Github\u7684\u4f8b\u5b50\u4e2d\uff0c\u4f86\u81ea<a href=\"https:\/\/blogs.akamai.com\/2018\/03\/memcached-fueled-13-tbps-attacks.html\">Akamai<\/a>\u7684\u7db2\u8def\u9059\u6e2c\u8cc7\u6599\u986f\u793a\u81f3\u5c11\u6709\u4e00\u6ce2\u653b\u64ca\u9020\u62101.35Tbps\u4ee5\u4e0a\u7684\u7db2\u8def\u6d41\u91cf\u9001\u5165\u5176\u4f3a\u670d\u5668\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/blog.trendmicro.com\/wp-content\/uploads\/2018\/03\/blog-1024x389.jpg\" \/><\/p>\n<p><em>\u57161<\/em><em>\uff1a\u4f86\u81ea https:\/\/githubengineering.com\/DDoS-incident-report\/<\/em><\/p>\n<p>&nbsp;<\/p>\n<p>\u8acb\u8a18\u4f4f\uff0c\u5176\u4e2d\u6709\u4e9b\u6d41\u91cf\u672c\u8eab\u4e0d\u662f\u653b\u64ca\u6d41\u91cf\uff0c\u800c\u662f\u6b63\u5e38\u7db2\u8def\u6d3b\u52d5\uff08\u5617\u8a66\u9032\u884chandshake\u4e4b\u985e\uff09\uff0c\u4f46\u6700\u7d42\u9084\u662f\u9020\u6210\u4e86\u5de8\u5927\u7684\u885d\u64ca\u3002\u6839\u64daAkamai SIRT\u7684\u8aaa\u6cd5\uff0c\u9019\u6b21\u653b\u64ca\u7684\u898f\u6a21\u662f2016\u5e749\u6708<a href=\"https:\/\/blog.trendmicro.com\/dyn-servers-attacked-hackers-means-iot\/\">Mirai<\/a>\u653b\u64ca\u7684\u5169\u500d\u3002<\/p>\n<p>\u4f7f\u7528memcached\u5176\u5be6\u5f88\u7c21\u55ae\u3002\u4f60\u767c\u9001\u4e00\u500bkey\uff0c\u5b83\u6703\u5c07\u8207\u8a72key\u76f8\u95dc\u7684\u8cc7\u6599\u9001\u56de\u7d66\u4f60\u3002\u53e6\u5916\u4e00\u500b\u597d\u8655\u662f\u53ef\u4ee5\u6839\u64da\u9700\u8981\u5c07\u591a\u7b46\u67e5\u8a62\u653e\u5165\u4e00\u500b\u8acb\u6c42\u4e2d\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/blog.trendmicro.com\/wp-content\/uploads\/2018\/03\/blog1-1024x687.jpg\" \/><\/p>\n<p><em>\u57162<\/em><em>\uff1a\u5efa\u7acb\u4e00\u500bmemcache<\/em><em>\u653b\u64ca<\/em><\/p>\n<p>&nbsp;<\/p>\n<p>\u5728\u76ee\u524d\u7684\u653b\u64ca\u4e2d\uff0c\u653b\u64ca\u8005\u5c0dMemcache\u670d\u52d9\u767c\u51faGETS\u8acb\u6c42\uff0c\u4ee5\u53d6\u5f97\u73fe\u6709key\u53ef\u4ee5\u5f97\u5230\u7684\u6240\u6709\u8cc7\u6599\uff08\u57162\u4e2d\u7684\u6b65\u9a5f3\u548c4\uff09\uff1b\u4f46\u5728\u8a31\u591a\u60c5\u6cc1\u4e0b\uff0cmemcache\u4f3a\u670d\u5668\u4e26\u4e0d\u53d7\u4fdd\u8b77\uff0c\u4e26\u4e14\u9084\u5141\u8a31SET\u6307\u4ee4\uff08\u4e5f\u5c31\u662f\u5c07\u8cc7\u6599\u52a0\u5165memcache\u4f3a\u670d\u5668\uff09\u3002\u60e1\u610f\u4efd\u5b50\u53ef\u4ee5\u7528\u5b83\u4f86\u5c07\u4e00\u500bkey\u8a2d\u5b9a\u6210\u53ef\u5141\u8a31\u7684\u6700\u5927\u8cc7\u6599blob\uff0c\u7136\u5f8c\u5c0d\u8a72key\u57f7\u884cGETS\u67e5\u8a62\uff08\u57162\u4e2d\u7684\u6b65\u9a5f1-4\uff09\uff0c\u4f86\u6700\u5927\u5316\u91dd\u5c0d\u53d7\u5bb3\u8005\u7684\u53cd\u5c04\u653b\u64ca\u3002<\/p>\n<p>\u96d6\u7136memcache\u53ef\u4ee5\u4ee5TCP\uff08\u539f\u751f\uff09\u548cUDP\u5b89\u88dd\uff0c\u4f46\u9019\u4e9b\u653b\u64ca\u4e3b\u8981\u51fa\u73fe\u5728UDP\u7aef\u53e311211\uff0c\u56e0\u70baUDP\u5354\u5b9a\u6bd4\u8f03\u5bb9\u6613\u6b3a\u9a19\u4f86\u6e90\u5730\u5740\uff0c\u66f4\u5bb9\u6613\u9032\u884c\u53cd\u5c04\u5f0fDDoS\u653b\u64ca\u3002<\/p>\n<p>\u6839\u64daShodan\u7684\u8cc7\u6599\uff0c\u5168\u7403\u6709120,458\u500b\uff08\u64b0\u5beb\u672c\u6587\u6642\uff09memcache\u4f3a\u670d\u5668\uff0c\u53ea\u6709\u4e0d\u52301\u842c\u53f0\u4f3a\u670d\u5668\u4f7f\u7528UDP\u3002\u66f4\u6709\u610f\u601d\u7684\u662f\uff0c\u5176\u4e2d\u5e7e\u4e4e\u6709\u4e09\u5206\u4e4b\u4e00\u90fd\u88ab\u7528\u5728\u653b\u64ca\u4e2d\u3002<!--more--><\/p>\n<p>\u73fe\u5728\uff0cmemcache\u653e\u5927\u503c\u7684\u4e00\u500b\u95dc\u9375\u56e0\u7d20\u8207\u8fd4\u56de\u7684\u8cc7\u6599blob\u6709\u95dc\u3002\u4e00\u822c\u4f86\u8aaa\uff0c\u5373\u6642\u9054\u5230\u4e0a\u9650\u9084\u662f\u4e0d\u5920\u5927\uff0c\u4f46\u67d0\u4e9b\u4ee3\u7ba1\u670d\u52d9\u5546\u7684memcache\u8a2d\u5b9a\u5141\u8a31\u66f4\u5927\u7684\u8cc7\u6599blob\uff08\u67d0\u4e9b\u8d85\u904e100G\uff09\uff0c\u9019\u8b93\u5b83\u5011\u5728DDoS\u653e\u5927\u653b\u64ca\u4e2d\u8b8a\u5f97\u66f4\u52a0\u6709\u7528\u3002<\/p>\n<p>\u6240\u4ee5\u9019\u4e9b\u653b\u64ca\u7684\u898f\u6a21\u53ef\u80fd\u6703\u6709\u4e9b\u524d\u63d0\u548c\u9650\u5236\u3002\u9996\u5148\uff0c\u5c31\u662f\u6703\u88ab\u7528\u65bc\u53cd\u5c04\u653b\u64ca\u7684memcached\u4f3a\u670d\u5668\u9023\u63a5\u7dda\u8def\u6240\u9650\u5236\u3002\u7121\u8ad6\u7522\u751f\u591a\u5927\u7684\u8cc7\u6599blob\uff0c1Gbps\u7684\u7dda\u8def\u90fd\u53ea\u80fd\u767c\u90011Gbps\u3002\u7db2\u8def\u5361\u4e5f\u6703\u9020\u6210\u4e00\u6a23\u7684\u72c0\u6cc1\u3002\u6700\u5f8c\uff0c<a href=\"https:\/\/en.wikipedia.org\/wiki\/User_Datagram_Protocol\">\u9019\u5354\u5b9a\u53ea\u5141\u8a31\u5169\u500b8 byte\u7684\u7db2\u8def\u5e8f\u865f<\/a>\uff08\u8cc7\u6599blob\u5fc5\u9808\u5207\u6210\u591a\u500b\u7247\u6bb5\u9001\u5230\u7db2\u8def \u2013 \u5e8f\u865f\u53ef\u4ee5\u8b93\u53e6\u4e00\u7aef\u77e5\u9053\u5982\u4f55\u5c07\u5b83\u5011\u5168\u90e8\u91cd\u7d44\u56de\u4f86\uff09\u3002\u4f46\u53ea\u6709\u5169\u500b\u5b57\u5143\u7d44\u4ee3\u8868\u5354\u5b9a\u53ef\u4ee5\u8fd4\u56de\u7684\u6700\u5927\u5c01\u5305\u6578\u91cf\u662f65,536\uff0c\u800c\u5c31\u7b97\u6bcf\u500b\u5c01\u5305\u90fd\u9054\u5230\u6700\u5927\u7684<a href=\"https:\/\/www.arbornetworks.com\/blog\/asert\/memcached-reflection-amplification-description-ddos-attack-mitigation-recommendations\/\">1428<\/a>\uff0c\u8a08\u7b97\u4e0b\u4f86\u7e3d\u5171\u4e5f\u53ea\u670993.58MB\uff0c\u4ee5\u7528\u4f86\u53cd\u5c04\u7684\u4f3a\u670d\u5668\u7dda\u8def\u901f\u5ea6\u50b3\u9001\u3002\u6216\u662f\u5982\u53e6\u4e00\u4f4d\u512a\u79c0\u7684\u540c\u4e8b\u6240\u8aaa \u2013 \u8acb\u6c42\/GETS\u7684\u90e8\u5206\u53ef\u80fd\u8d85\u7d1a\u5927\uff0c\u4f46\u56e0\u70ba\u5c01\u5305\u50b3\u9001\u5e8f\u865f\u9650\u5236\u800c\u53d7\u5230\u6291\u5236\u3002\u9019\u4e5f\u5f15\u767c\u4e86\u53e6\u4e00\u500b\u554f\u984c\uff0cmemcached\u5982\u4f55\u8655\u7406\u7db2\u8def\u5e8f\u865f\u6bd4\u6b63\u5e38\u5141\u8a31\u503c\u66f4\u5927\u7684\u8cc7\u6599blob\uff0c\u56e0\u70ba\u5354\u5b9a\u5167\u4f3c\u4e4e\u6c92\u6709\u63d0\u5230\u5982\u4f55\u8655\u7406\u9019\u4e9b\u5c01\u5305\u3002\u9019\u662f\u6211\u9700\u8981\u66f4\u591a\u8cc7\u6599\u7684\u90e8\u5206\u3002<\/p>\n<p>\u90a3\u9ebc\u73fe\u5728\uff0c\u5929\u584c\u4e0b\u4f86\u4e86\u55ce\uff1f\u7db2\u969b\u7db2\u8def\u6703\u9032\u5165\u9ed1\u6697\u671f\uff1f\u4e0d\u6703\u3002\u5118\u7ba1\u6211\u5011\u9084\u8655\u5728\u4e86\u89e3\u9019\u7a2e\u65b0\u653b\u64ca\u5a92\u4ecb\u7684\u65e9\u671f\u968e\u6bb5\uff0c\u4e0d\u904e\u5373\u4f7f\u662fNDP\u3001SSDP\u548cDNS\u653e\u5927\u653b\u64ca\u4e5f\u6c92\u51fa\u73fe\u6301\u7e8c\u6027\u7684\u5927\u898f\u6a21DDoS\u653b\u64ca\uff0c\u800cmemcached\u4e5f\u4e0d\u5927\u53ef\u80fd\u767c\u751f\u3002\u4f46\u662f\u6211\u5011\u5f88\u6709\u6a5f\u6703\u770b\u5230DDoS\u653b\u64ca\u7684\u898f\u6a21\u6210\u9577\u3002\u6240\u4ee5\uff0c\u5c31\u5982\u540c\u9762\u5c0d\u5176\u4ed6\u963b\u65b7\u670d\u52d9\u653b\u64ca\u4e00\u6a23\uff0c\u4ee5\u4e0b\u662f\u4f60\u8a72\u505a\u7684\uff1a<\/p>\n<ul>\n<li>\u4e86\u89e3memcache\u653b\u64ca\uff08<a href=\"https:\/\/www.arbornetworks.com\/blog\/asert\/memcached-reflection-amplification-description-ddos-attack-mitigation-recommendations\/\">Arbor<\/a>\u548c<a href=\"https:\/\/blog.netlab.360.com\/memcache-ddos-a-little-bit-more-en\/\">360 Netlab<\/a>\u90fd\u5c0d\u9019\u4e9b\u653b\u64ca\u63d0\u4f9b\u5f88\u597d\u7684\u5206\u6790\uff09<\/li>\n<li>\u4f7f\u7528\u8da8\u52e2\u79d1\u6280\u7684\u7db2\u8def\u5165\u4fb5\u5075\u6e2c\u5de5\u5177\uff08\u4f8b\u5982DDI\u548cTippingPoint\uff09\u4f86\u78ba\u4fdd\u5c0d\u7db2\u8def\u9032\u884c\u5b8c\u5584\u7684\u6d41\u91cf\u76e3\u63a7\uff08\u5305\u62ec\u9032\u51fa\u7684\u6d41\u91cf\uff09<\/li>\n<li>\u78ba\u4fdd\u4f7f\u7528\u591a\u500b\u4e0a\u6e38\u7db2\u8def\u670d\u52d9\u5546\uff0c\u4ee5\u4fbf\u5728\u4e3b\u8981\u7dda\u8def\u906d\u53d7\u653b\u64ca\u6642\u9084\u80fd\u5920\u8f49\u79fb\u5230\u5176\u4ed6\u7dda\u8def<\/li>\n<li>\u78ba\u4fdd\u81ea\u5df1\u7684\u7db2\u8def\u670d\u52d9\u5546\u5be6\u65bd\u9632\u6b3a\u9a19\u6700\u4f73\u5be6\u4f5c\uff08\u4f8b\u5982BCP38 &amp; 84\uff09\uff0c\u4ee5\u78ba\u4fdd\u6b3a\u9a19\u6027\u5c01\u5305\uff08\u5982DDoS\u53cd\u5c04\u653b\u64ca\u4e2d\u6240\u7528\uff09\u4e00\u958b\u59cb\u5c31\u4e0d\u6703\u9032\u5165\u4f60\u7684\u7db2\u8def\uff01<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><em>\u8cc7\u5b89\u793e\u7fa4\u7684\u5925\u4f34\u5011\u5354\u52a9\u7814\u7a76\u9019\u7a2e\u65b0\u7684\u653b\u64ca\u5a92\u4ecb\u3002\u6211\u8981\u611f\u8b1d\u9019\u4e9b\u4eba\uff0c\u7279\u5225\u662fGoogle<\/em><em>\u7684Damien Menscher<\/em><em>\u5e6b\u5fd9\u4e86\u89e3\u653b\u64ca\u6d41\u91cf\u6240\u7528\u7684\u5354\u5b9a\u548c\u4e92\u52d5\u6a21\u5f0f\uff0c\u4ee5\u53caShodan<\/em><em>\u7684John Matherly<\/em><em>\u5354\u52a9\u8a55\u4f30\u5168\u7403\u5f71\u97ff\u3002<\/em><\/p>\n<p>&nbsp;<\/p>\n<p>@\u539f\u6587\u51fa\u8655\uff1a<a href=\"https:\/\/blog.trendmicro.com\/exposed-world-old-exposures-new-attacks\/\">Our Exposed World \u2013 Old exposures, new attacks<\/a> \u4f5c\u8005\uff1aNatasha Hellberg\uff08FTR\u8cc7\u6df1\u5a01\u8105\u7814\u7a76\u54e1\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u904e\u53bb\u5e7e\u5929\u51fa\u73fe\u4e86\u4e00\u7a2e\u65b0\u7684\u5206\u6563\u5f0f\u963b\u65b7\u670d\u52d9\uff08DDoS\uff09\u653e\u5927\u653b\u64ca\uff0c\u800c\u4e14\u5b83\u6709\u6f5b\u529b\u9020\u6210\u6bd4\u904e\u53bb\u90fd\u66f4\u56b4\u91cd\u7684DDoS\u653b\u64ca\u3002\u96d6\u7136 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_wpscppro_dont_share_socialmedia":false,"_wpscppro_custom_social_share_image":0,"_facebook_share_type":"","_twitter_share_type":"","_linkedin_share_type":"","_pinterest_share_type":"","_linkedin_share_type_page":"","_instagram_share_type":"","_medium_share_type":"","_threads_share_type":"","_google_business_share_type":"","_selected_social_profile":[],"_wpsp_enable_custom_social_template":false,"_wpsp_social_scheduling":{"enabled":false,"datetime":null,"platforms":[],"status":"template_only","dateOption":"today","timeOption":"now","customDays":"","customHours":"","customDate":"","customTime":"","schedulingType":"absolute"},"_wpsp_active_default_template":true},"categories":[179],"tags":[333],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=\/wp\/v2\/posts\/54744"}],"collection":[{"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=54744"}],"version-history":[{"count":0,"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=\/wp\/v2\/posts\/54744\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=54744"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=54744"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=54744"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}