{"id":1903,"date":"2017-04-12T01:06:13","date_gmt":"2017-04-12T01:06:13","guid":{"rendered":"https:\/\/www.inforsec.org\/wp\/?p=1903"},"modified":"2017-04-12T01:06:13","modified_gmt":"2017-04-12T01:06:13","slug":"ssltls%e7%9a%84%e8%bf%91%e5%b9%b4%e7%9b%b8%e5%85%b3%e6%94%bb%e5%87%bb%e7%a0%94%e7%a9%b6%e7%bb%bc%e8%bf%b0%ef%bc%88%e4%ba%94%ef%bc%89","status":"publish","type":"post","link":"http:\/\/202.112.238.40\/wp\/?p=1903","title":{"rendered":"SSL\/TLS\u7684\u8fd1\u5e74\u76f8\u5173\u653b\u51fb\u7814\u7a76\u7efc\u8ff0\uff08\u4e94\uff09"},"content":{"rendered":"

SSL\/TLS\u7684\u8fd1\u5e74\u76f8\u5173\u653b\u51fb\u7814\u7a76\u7efc\u8ff0\uff08\u4e94\uff09<\/strong><\/p>\n

\u534f\u8bae\u5b9e\u73b0\u4e0d\u8db3\u7684\u6f0f\u6d1e<\/strong><\/p>\n

\u4f5c\u8005\uff1a\u97e6\u4fca\u7433 \u6e05\u534e\u5927\u5b66<\/p>\n

\u7b80\u4ecb\uff1a<\/strong>SSL\uff0fTLS\u534f\u8bae\u7684\u8bbe\u8ba1\u662f\u975e\u5e38\u590d\u6742\u7684\uff0c\u5176\u4e2d\u5728\u4e00\u4e9bRFC\u7684\u5b9a\u4e49\u5e76\u6ca1\u6709\u88ab\u5f88\u597d\u7684\u5b9e\u73b0\uff0c\u6216\u8005\u8bf4\u5728\u5b9e\u73b0\u8fc7\u7a0b\u4e2d\u5b58\u5728\u504f\u5dee\uff0c\u5bfc\u81f4\u5b58\u5728\u7740\u4e00\u4e9b\u81f4\u547d\u7684\u6f0f\u6d1e\u3002\u8fd1\u51e0\u5e74\u6709\u5f88\u591a\u7814\u7a76\u4eba\u5458\u5bf9TLS\u7684\u5b9e\u73b0\u505a\u4e86\u6df1\u5165\u7684\u7814\u7a76\uff0c\u5982OpenSSL\uff0cMatrixSSL\u7b49\uff0c\u53d1\u73b0\u4e86\u4e00\u4e9b\u6bd4\u8f83\u6709\u610f\u4e49\u7684\u6f0f\u6d1e\uff0c\u5982HeartBleed\uff0cFREAK\u7b49\u3002\u5728\u53d1\u73b0\u6f0f\u6d1e\u7684\u5de5\u7a0b\u4e2d\uff0c\u7814\u7a76\u4eba\u5458\u5f00\u53d1\u4e86\u5f88\u591a\u65b0\u7684\u65b9\u5f0f\uff0c\u5176\u4e2d\u5229\u7528\u81ea\u52a8\u72b6\u6001\u673a\u6765\u53d1\u73b0\u6f0f\u6d1e\u7684\u65b9\u5f0f\u5c31\u5177\u6709\u5f88\u5f3a\u7684\u5f71\u54cd\u529b\u3002<\/p>\n

<\/p>\n

\u5229\u7528\u72b6\u6001<\/b><\/strong>\u673a<\/b><\/strong>\u68c0\u6d4b\u6f0f\u6d1e<\/b><\/strong><\/h3>\n

\u5728TLS\u5b9e\u73b0\u4e2d\uff0c\u8fd8\u5b58\u5728\u7740\u5f88\u591a\u7ec6\u8282\u7684\u95ee\u9898\u9700\u8981\u89e3\u51b3\u3002\u5728[1]\u4e2d\uff0c\u4f5c\u8005\u7814\u7a76TLS\u63e1\u624b\u7684\u53ef\u9a8c\u8bc1\u5b89\u5168\u6027\u3002\u901a\u8fc7mi TLS\u9a8c\u8bc1\u4e86\u8bb8\u591a\u534f\u8bae\u7248\u672c\uff0c\u914d\u7f6e\u548c\u5bc6\u7801\u5957\u4ef6\u7684\u4e3b\u6d41\u6d4f\u89c8\u5668\u548c\u670d\u52a1\u5668\u7684\u4e92\u64cd\u4f5c\u6027\uff0c\u5e76\u4e3a\u5176\u63d0\u4f9b\u4e86\u5728\u5e94\u7528\u5c42\u53ef\u8bc1\u660e\u7684\u5b89\u5168\u6027\u3002\u5728TLS\u534f\u8bae\u7684\u5b9e\u73b0\u4e2d\uff0c\u5fc5\u987b\u5904\u7406\u5404\u79cd\u7248\u672c\u534f\u8bae\u548c\u76f8\u5173\u7684\u6269\u5c55\uff0c\u8ba4\u8bc1\u6a21\u5f0f\u548c\u5bc6\u94a5\u4ea4\u6362\u7684\u65b9\u6cd5\uff0c\u800c\u4e0d\u540c\u7684\u7ec4\u5408\u5728\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7aef\u4e4b\u95f4\u53c8\u5f62\u6210\u4e86\u4e0d\u540c\u7684\u6d88\u606f\u5e8f\u5217\u3002\u4f5c\u8005\u5728[2]\u4e2d\u8bbe\u8ba1\u590d\u5408\u72b6\u6001\u673a\u6765\u89e3\u51b3\u4e0d\u540c\u534f\u8bae\u6a21\u5f0f\u4e4b\u95f4\u7684\u7ec6\u8282\u95ee\u9898\uff0c\u901a\u8fc7\u7cfb\u7edf\u6d4b\u8bd5\u4e00\u4e9b\u6d41\u884c\u7684\u5f00\u6e90TLS\uff0c\u53d1\u73b0\u4e86\u591a\u5e74\u6765\u9690\u85cf\u5728\u8fd9\u4e9b\u5e93\u91cc\u9762\u7684\u51e0\u4e2a\u5173\u952e\u6027\u5b89\u5168\u6f0f\u6d1e\u3002\u81ea\u52a8\u72b6\u6001\u673a\u662f\u7b2c\u4e00\u4e2a\u7528C\u8bed\u8a00\u5199\u7684\uff0c\u8fdb\u884c\u8fc7\u9a8c\u8bc1\u7684TLS\u72b6\u6001\u673a\u7efc\u5408\u5b9e\u73b0\uff0c\u5e76\u4e14\u53ef\u4ee5\u5d4c\u5165\u5230OpenSSL\u4e2d\u8fdb\u884c\u4f7f\u7528\u3002\u5229\u7528\u8bba\u6587\u4e2d\u7684\u65b9\u6cd5\u53ef\u4ee5\u5bf9\u5bc6\u7801\u534f\u8bae\u5e93\u7684\u6838\u5fc3\u7ec4\u4ef6\u8fdb\u884c\u5f62\u5f0f\u5316\u9a8c\u8bc1\u3002<\/p>\n

\u7ecf\u8fc720\u5e74\u7684\u6f14\u53d8\uff0cTLS\u5177\u6709\u5f88\u591a\u7248\u672c\uff0c\u6269\u5c55\u548c\u5bc6\u7801\u5957\u4ef6\uff0c\u800c\u4e14\u5176\u4e2d\u7684\u4e00\u4e9b\u5df2\u7ecf\u4e0d\u88ab\u4f7f\u7528\u6216\u8005\u5df2\u7ecf\u88ab\u786e\u8ba4\u4e3a\u4e0d\u5b89\u5168\u3002\u4f46\u662f\uff0c\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7aef\u7684\u5b9e\u73b0\u8981\u4fdd\u8bc1\u5177\u6709\u7075\u6d3b\u6027\uff0c\u4e92\u64cd\u4f5c\u6027\uff0c\u5bfc\u81f4\u5b83\u4eec\u7684\u90e8\u7f72\u4e2d\u901a\u5e38\u4f1a\u652f\u6301\u4e0d\u5b89\u5168\u7684\u5bc6\u7801\u5957\u4ef6\u3002\u5f53\u7136\u63e1\u624b\u671f\u95f4\u7684TLS\u4f1a\u8bdd\u7684\u7279\u5b9a\u53c2\u6570\u4f1a\u901a\u8fc7MAC\u6765\u9a8c\u8bc1\uff0c\u786e\u4fdd\u4e0d\u4f1a\u88ab\u7be1\u6539\uff0c\u800c\u4e14\u5982\u679c\u5ba2\u6237\u7aef\u6216\u8005\u670d\u52a1\u5668\u7aef\u4ec5\u652f\u6301\u5b89\u5168\u534f\u8bae\u7248\u672c\uff0c\u90a3\u4e0d\u7ba1\u5bf9\u7b49\u65b9\u652f\u6301\u4ec0\u4e48\u4e0d\u5b89\u5168\u7684\u5957\u4ef6\uff0c\u4e5f\u53ea\u80fd\u548c\u5b89\u5168\u65b9\u4fdd\u6301\u4e00\u81f4\u3002\u800c\u5728\u5177\u4f53\u5b9e\u73b0\u4e2d\uff0c\u5c31TLS1.0\uff5eTLS1.2\u800c\u8a00\uff0c\u6709\u4e00\u4e9b\u7ec6\u8282\u5730\u65b9\u4e0d\u80fd\u88ab\u5ffd\u89c6\u3002\u9996\u5148\uff0c\u534f\u8bae\u4e2d\u6d88\u606f\u987a\u5e8f\u662f\u7cbe\u5fc3\u8bbe\u8ba1\u7684\uff0c\u4ece\u4e92\u64cd\u4f5c\u6027\u548c\u5b89\u5168\u6027\u7684\u89d2\u5ea6\u662f\u4e0d\u80fd\u968f\u610f\u66f4\u6539\u7684\uff0c\u6bd4\u5982ServerCCS\u6d88\u606f\u5c31\u5fc5\u987b\u5728ServerFinished\u6d88\u606f\u4e4b\u524d\u53d1\u751f\u3002\u5176\u6b21\uff0c\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7aef\u5fc5\u987b\u8981\u80fd\u533a\u5206\u771f\u6b63\u53ef\u9009\u7684\u6d88\u606f\uff0c\u800c\u4e0d\u662f\u7b80\u5355\u7684\u7ebf\u6027\u63a5\u6536\u548c\u53d1\u9001\uff0c\u7c7b\u4f3c\u4e8e\u533a\u5206ServerNewSessionTicket\u548c\u5f53\u524d\u5bc6\u94a5\u4ea4\u6362\u6d88\u606f\u3002\u7136\u540e\uff0c\u4e0d\u80fd\u8fc7\u65e9\u5730\u8ba1\u7b97\u4f1a\u8bdd\u53c2\u6570\u548c\u79d8\u94a5\uff0c\u5ba2\u6237\u7aef\u5e94\u8be5\u5728\u63a5\u6536\u5230\u670d\u52a1\u5668\u7684\u6d88\u606f\u540e\u624d\u786e\u8ba4\u63e1\u624b\u8fc7\u7a0b\u3002\u8fd8\u6709\u4e00\u4e9b\u7248\u672c\u7684\u534f\u8bae\uff0c\u5982SSLv23\uff0cDTLS\u90fd\u5b58\u5728\u4e00\u4e9b\u7ec6\u8282\u95ee\u9898\uff0c\u5728SSLv3\u4e2d\uff0c\u5ba2\u6237\u7aef\u53ef\u80fd\u6839\u672c\u4e0d\u53d1\u9001ClientCertificate\u6d88\u606f\uff0c\u800cDTLS\u5219\u5141\u8bb8\u670d\u52a1\u5668\u4f7f\u7528\u65b0\u7684HelloVerifyRequest\u6d88\u606f\u6765\u54cd\u5e94ClientHello\u3002\u5728TLS\u5e93\u4e2d\uff0c\u8fd8\u5b9e\u73b0\u4e86\u8bb8\u591a\u5728\u7f51\u7edc\u4e0a\u4e0d\u5e38\u7528\u7684\u5bc6\u7801\u534f\u8bae\uff0c\u5982PSK\uff0cDH\u00a0anon\uff0fECDH\u00a0anon\uff0cDHE PSK\u7b49\uff0c\u4f7f\u7528\u8fd9\u4e9b\u5bc6\u94a5\u5957\u4ef6\u65f6\u9700\u8981\u4e00\u4e9b\u989d\u5916\u7684\u534f\u5546\u53c2\u6570\u3002\u800c\u5bf9\u4e8e\u91cd\u534f\u5546\uff0c\u5728\u540c\u4e00\u4e2a\u8fde\u63a5\u4e0a\u5efa\u7acb\u591a\u4e2aTLS\u63e1\u624b\uff0c\u4ece\u903b\u8f91\u4e0a\u770b\uff0c\u975e\u5e38\u6e05\u6670\uff0c\u4f46\u662f\u5b9e\u73b0\u8d77\u6765\u5c31\u76f8\u5f53\u68d8\u624b\uff0c\u4e5f\u5c31\u5bfc\u81f4\u4e86\u5f88\u591a\u5229\u7528\u91cd\u534f\u5546\u6f0f\u6d1e\u7684\u653b\u51fb\u3002<\/p>\n

\u4f5c\u8005\u5229\u7528[3]\u4e2d\u5f00\u53d1\u7684FLEXTLS\u5de5\u5177\u6765\u9a8c\u8bc1\u8fd9\u4e9b\u5b9e\u73b0\u4e2d\u7684\u6f0f\u6d1e\uff0c\u8be5\u5de5\u5177\u662f\u5efa\u7acb\u5728miTLS\u4e0a\uff0c\u7ecf\u8fc7\u9a8c\u8bc1\u7684TLS\u5b9e\u73b0\u3002\u5229\u7528\u5f3a\u5927\u7684\u6d88\u606f\u4f20\u9001\u548c\u5bc6\u7801\u5e93\uff0cFLEXTLS\u80fd\u591f\u7528\u6765\u8bc4\u4f30\u534f\u8bae\u7684\u6f0f\u6d1e\u3002\u4f7f\u7528\u8be5\u5de5\u5177\uff0c\u53d1\u73b0\u6700\u8fd1\u7684\u5bf9TLS\u5b9e\u73b0\u7684\u653b\u51fb\uff0c\u5982SKIP\u548cFREAK\uff0c\u4ee5\u53ca\u4e3aFREAK\u548cLogjam\u63d0\u4f9b\u7b2c\u4e00\u4e2a\u9a8c\u8bc1\u6f14\u793a\u3002\u5728[2]\u4e2d\uff0c\u4f5c\u8005\u4e5f\u5e94\u7528\u4e86FLEXTLS\u5de5\u5177\u6765\u8fdb\u884c\u8bc4\u4f30\u9a8c\u8bc1\uff0c\u6d4b\u51fa\u5f88\u591a\u7ec6\u8282\u6f0f\u6d1e\u3002\u5982OpenSSL\u4e2dEarlyCCS(CCS\u4e25\u683c\u610f\u4e49\u4e0a\u4e0d\u662fhandshake message\uff0c\u4e0d\u51fa\u73b0handshake log\u4e2d\uff0c\u4e0d\u53d7\u5ba2\u6237\u7aef\u6216\u670d\u52a1\u5668\u7aef\u72b6\u6001\u673a\u63a7\u5236\uff0c\u53ef\u4ee5\u51fa\u73b0\u5728ServerHello\u540e\u7684\u4efb\u610f\u4f4d\u7f6e,\u00a0\u4e2d\u95f4\u4eba\u901a\u8fc7\u5728ServerHello\u4e4b\u540e\u5411\u5bf9\u65b9\u6ce8\u5165CCS\u6d88\u606f\uff0c\u63d0\u524d\u8bbe\u7f6e\u5f31\u8bb0\u5f55\u5bc6\u94a5\uff0c\u7136\u540e\u8ba9\u4ed6\u4eec\u5b8c\u6210\u63e1\u624b,\u62e6\u622a\u5408\u6cd5\u7684CCS\u6d88\u606f), DH Certificate(client\u5ffd\u7565ClientKeyExchange\uff0c\u53ef\u80fd\u5bfc\u81f4client impersonation\u00a0attack), Server-Gated Crypto(SGC\u5141\u8bb8\u5ba2\u6237\u7aef\u6536\u5230serverhello\u540e\u91cd\u65b0\u63e1\u624b\uff0c\u4f46\u662f\u8868\u660e\u67d0\u4e9bextension\u662f\u5426\u88ab\u4f7f\u7528\u7684\u4fe1\u606f\u4f1a\u5728\u65b0\u63e1\u624b\u4e2d\u6d88\u5931), Export RSA(512\u4f4d\u5f31\u7b7e\u540d)\uff0cStatic DH(\u4f7f\u7528DHE\u6216\u8005ECDHE\u65f6\uff0c\u5982\u679c\u8bc1\u4e66\u5305\u542bECDH\u516c\u94a5\uff0c\u800c\u4e14\u5ba2\u6237\u7aef\u4e0d\u63a5\u53d7ServerKeyExchange\uff0c\u5219\u4f1a\u56de\u6eda\u5230static ECDH\uff0c\u7528\u670d\u52a1\u5668\u8bc1\u4e66\u7684\u516c\u94a5\uff0c\u5bfc\u81f4\u524d\u5411\u5b89\u5168\u6027\u4e22\u5931)\u3002\u8fd8\u6709JSSE\u76f8\u5173\u95ee\u9898\uff0c\u5982Client flaws(\u5904\u7406\u7279\u5b9a\u4e8e\u67d0\u4e9b\u5bc6\u7801\u7684\u53ef\u9009\u6d88\u606f\uff0c\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u72b6\u6001\u673a\u90fd\u5141\u8bb8\u8df3\u8fc7\u6d88\u606f\uff0c\u5bfc\u81f4\u00a0server\u00a0impersonation attack), Server flaws(JSSE \u670d\u52a1\u5668\u7c7b\u4f3c\u7684\u5141\u8bb8\u5ba2\u6237\u7aef\u8df3\u8fc7\u6d88\u606f)\u3002\u8fd8\u6709\u4e00\u4e9b\u5173\u4e8eNSS\uff0cMono\uff0cCyaSSL\u548cGnuTLS\u76f8\u5173\u6f0f\u6d1e\u3002\u8fd9\u4e2a\u72b6\u6001\u673a\u53d1\u73b0\u4e86\u5f88\u591a\u5b9e\u73b0\u8fc7\u7a0b\u4e2d\u5b58\u5728\u7684\u6f0f\u6d1e\uff0c\u4f5c\u8005\u4e5f\u5bf9\u5927\u90e8\u5206\u6f0f\u6d1e\u8fdb\u884c\u4e86\u6d4b\u8bd5\uff0c\u9a8c\u8bc1\u6f0f\u6d1e\u7684\u5b58\u5728\uff0c\u5e76\u9488\u5bf9\u6027\u7684\u63d0\u51fa\u6539\u8fdb\u5efa\u8bae\u3002<\/p>\n

\u5fc3<\/b><\/strong>\u810f<\/b><\/strong>\u51fa\u8840<\/b><\/strong><\/h3>\n

Heartbleed\u662fOpenSSL\u5b9e\u73b0\u4e0a\u5b58\u5728\u7684\u6f0f\u6d1e\uff0c\u901a\u8fc7\u53d1\u9001\u7279\u6b8a\u4fe1\u53f7Heartbeat \u7ed9\u670d\u52a1\u5668\uff0c\u6765\u67e5\u770b\u670d\u52a1\u5668\u662f\u5426\u5728\u7ebf\uff0c\u5f53\u670d\u52a1\u5668\u5728\u7ebf\u65f6\uff0c\u4f1a\u53d1\u9001\u56de\u590d\u4fe1\u606f\u7ed9\u4e3b\u673a\uff0c\u7136\u540e\u5141\u8bb8\u8fdb\u884c\u5b89\u5168\u901a\u4fe1\uff0c\u670d\u52a1\u5668\u548c\u4e3b\u673a\u4f1a\u95f4\u65ad\u6027\u7684\u53d1\u9001\u8fd9\u4e2a\u4fe1\u53f7\u786e\u4fdd\u5bf9\u65b9\u662f\u5426\u5728\u7ebf\u3002\u5fc3\u8df3\u5305\u8bbe\u8ba1\u4e4b\u521d\u662f\u4e3a\u4e86\u80fd\u591f\u89e3\u51b3\u53ca\u65f6\u68c0\u6d4b\u8fde\u63a5\u72b6\u6001\u95ee\u9898\uff0c\u76f8\u6bd4TCP\u7684keepAlive\u673a\u5236\u5177\u6709\u66f4\u5927\u7684\u7075\u6d3b\u6027\uff0c\u53ef\u4ee5\u81ea\u5df1\u6765\u63a7\u5236\u68c0\u6d4b\u7684\u95f4\u9694\u548c\u68c0\u6d4b\u7684\u65b9\u5f0f\u3002[4]<\/p>\n

\u5fc3\u810f\u51fa\u8840\u6f0f\u6d1e\u6700\u5148\u662f\u88ab\u8c37\u6b4c\u5b89\u5168\u4e2d\u5fc3\u7684Neel Mehta\u63d0\u51fa\u6765\u7684\uff0c\u4ee3\u7801\u5b9e\u73b0\u4e2d\u6ca1\u6709\u5bf9\u5185\u5bb9\u5206\u914d\u7684\u9650\u5236\uff0c\u653b\u51fb\u8005\u80fd\u591f\u5229\u7528Heartbeat\u53d1\u9001\u6076\u610f\u4fe1\u606f\u7ed9\u670d\u52a1\u5668\uff0c\u5f3a\u5236OpenSSL\u670d\u52a1\u5668\u8bfb\u53d6\u4efb\u610f\u5185\u5b58\u4f4d\u7f6e\uff0c\u653b\u51fb\u8005\u8fd8\u80fd\u591f\u63a7\u5236\u5fc3\u8df3\u7684\u5927\u5c0f\u548c\u7ed3\u6784\uff0c\u7136\u540e\u5229\u7528TCP\u534f\u8bae\uff0c\u5728443\u7aef\u53e3\u63a5\u6536\u8bf7\u6c42\uff0c\u4e00\u6b21\u53ef\u4ee5\u6536\u523064kb\u7684\u670d\u52a1\u5668\u5185\u5b58\u6570\u636e\uff0c\u591a\u6b21\u8bf7\u6c42\uff0c\u653b\u51fb\u8005\u80fd\u591f\u5f97\u5230\u66f4\u591a\u7684\u670d\u52a1\u5668\u5185\u5b58\u4fe1\u606f\uff0c\u6709\u53ef\u80fd\u5305\u62ec\u5927\u91cf\u7684\u90ae\u4ef6\u5730\u5740\uff0c\u5bc6\u7801\u7b49\u4fe1\u606f\u3002OpenSSL\u4ece1.0.1\u7248\u672c\u52301.0.1f\u7248\u672c\u90fd\u5e7f\u6cdb\u5b58\u5728\u5fc3\u810f\u51fa\u8840\u6f0f\u6d1e\uff0c\u53ef\u60f3\u800c\u77e5\uff0c\u6570\u91cf\u5de8\u5927\u7684\u670d\u52a1\u5668\u90fd\u4f1a\u53d7\u5230\u5f71\u54cd\uff0c\u6839\u636eNetcraft\u4f30\u8ba1\uff0c17%\u7684\u670d\u52a1\u5668\u90fd\u53d7\u5230\u4e86\u5f71\u54cd\uff0c\u5927\u7ea6\u572850\u4e07\u53f0\u3002<\/p>\n

\u5f53\u7136\u6700\u81f4\u547d\u7684\u662f\u653b\u51fb\u8005\u53ef\u4ee5\u7528\u8fd9\u79cd\u65b9\u5f0f\u6765\u83b7\u53d6\u52a0\u5bc6\u5bc6\u94a5\uff0c\u6cc4\u6f0f\u7684\u5bc6\u94a5\u5141\u8bb8\u653b\u51fb\u8005\u89e3\u5bc6\u8fc7\u53bb\u548c\u672a\u6765\u7684\u76f8\u5173\u6d41\u91cf\uff0c\u5e76\u4e14\u53ef\u4ee5\u968f\u610f\u5047\u5192\u670d\u52a1\u3002\u800c\u4e14X.509\u8bc1\u4e66\u4e2d\u7684\u52a0\u5bc6\u548c\u7b7e\u540d\u63d0\u4f9b\u7684\u4fdd\u62a4\u90fd\u53ef\u4ee5\u88ab\u7ed5\u8fc7\uff0c\u90a3\u4e48\u4ece\u6b64\u6cc4\u6f0f\u4e2d\u6062\u590d\u9700\u8981\u4fee\u8865\u6f0f\u6d1e\uff0c\u5e76\u64a4\u9500\u88ab\u6cc4\u6f0f\u7684\u5bc6\u94a5\uff0c\u91cd\u65b0\u53d1\u5e03\u548c\u91cd\u65b0\u5206\u53d1\u65b0\u5bc6\u94a5\u3002\u5373\u4f7f\u8fd9\u6837\u505a\uff0c\u653b\u51fb\u8005\u4ecd\u7136\u53ef\u4ee5\u89e3\u5bc6\u8fc7\u53bb\u62e6\u622a\u7684\u6d41\u91cf\uff0c\u8fd9\u4e9b\u90fd\u5fc5\u987b\u7531\u670d\u52a1\u7684\u4e1a\u4e3b\u6765\u5b8c\u6210\u3002<\/p>\n

\u5bf9\u8be5\u95ee\u9898\u7684\u89e3\u51b3\u6700\u6709\u6548\u7684\u65b9\u5f0f\u662f\u6253\u8865\u4e01\uff0c\u53ef\u4ee5\u9009\u62e9\u5347\u7ea7OpenSSL\u7248\u672c\uff0c\u4e5f\u53ef\u4ee5\u914d\u7f6eOpenSSL\u534f\u8bae\u6765\u5220\u9664\u5bf9\u5fc3\u8df3\u534f\u8bae\u7684\u652f\u6301\u3002\u7531\u4e8e\u653b\u51fb\u8005\u53ef\u80fd\u83b7\u53d6\u5230\u5bc6\u94a5\uff0c\u6240\u4ee5\u6700\u597d\u66ff\u6362\u79c1\u94a5\uff0c\u5e76\u4e14\u8981\u60f3\u4fdd\u8bc1\u8fc7\u53bb\u7684\u52a0\u5bc6\u4fe1\u606f\u65e0\u6cd5\u88ab\u6cc4\u6f0f\u7684\u670d\u52a1\u5668\u79c1\u94a5\u5f71\u54cd\uff0c\u53ef\u4ee5\u90e8\u7f72\u5177\u6709\u524d\u5411\u4fdd\u5bc6\u6027\u7684\u52a0\u5bc6\u65b9\u5f0f\u3002<\/p>\n

Freak<\/b><\/strong>\u00a0<\/b><\/strong>\u548c<\/b><\/strong>\u00a0<\/b><\/strong>Logjam<\/b><\/strong><\/h3>\n

\u7ee7Heartbleed\u00a0\u540e\uff0cOpenSSL\u53c8\u88ab\u516c\u5e03\u4e86Freak\uff08Factoring RSA\u00a0Export\u00a0Keys\uff09\u6f0f\u6d1e\uff0c\u867d\u7136\u8fd9\u4e2a\u6f0f\u6d1e\u7684\u5f71\u54cd\u6ca1\u6709Heartbleed\u5f71\u54cd\u529b\u90a3\u4e48\u5927\uff0c\u4f46\u662f\u5f88\u5bb9\u6613\u88ab\u4e2d\u95f4\u4eba\u5229\u7528\u906d\u53d7\u4e2d\u95f4\u4eba\u653b\u51fb\u3002\u8be5\u6f0f\u6d1e\u6e90\u81ea\u4e8e20\u4e16\u7eaa90\u5e74\u4ee3\uff0c\u7f8e\u56fd\u9650\u5236\u51fa\u53e3\u9ad8\u5f3a\u5ea6\u7684\u52a0\u5bc6\u7b97\u6cd5\uff0c\u9650\u5236\u52a0\u5bc6\u5f3a\u5ea6\u6700\u5927\u4e3a40\u4f4d\uff0c\u5bc6\u94a5\u4ea4\u6362\u5f3a\u5ea6\u6700\u5927\u4e3a512\u4f4d\u3002\u4ece\u73b0\u5728\u7684\u8ba1\u7b97\u901f\u5ea6\u6765\u770b\uff0c\u8fd9\u4e2d\u51fa\u53e3\u5bc6\u7801\u5957\u4ef6\u7684\u5b89\u5168\u5f3a\u5ea6\u662f\u975e\u5e38\u5f31\u7684\uff0c\u4efb\u4f55\u4eba\u90fd\u53ef\u4ee5\u5728\u51e0\u5c0f\u65f6\u5185\u5b8c\u6210\u7834\u89e3\u3002\u8fdb\u884cFREAK\u653b\u51fb\uff0c\u9700\u8981\u514b\u670d\u4e24\u4e2a\u969c\u788d\uff0c\u9996\u5148\u88ab\u6ce8\u5165\u7684\u6d88\u606f\u9700\u8981\u88ab\u76ee\u6807\u670d\u52a1\u5668\u4e0a\u7684\u5f3aRSA\u7b7e\u540d\uff0c\u7136\u540e\u4e3a\u4e86\u4fee\u6539TLS\u63e1\u624b\u7684\u6d88\u606f\uff0c\u653b\u51fb\u8005\u9700\u8981\u4f2a\u9020Finished\u6d88\u606f\uff0c\u4f7f\u5f97\u5bf9\u6d88\u606f\u7684\u4fee\u6539\u53d8\u5f97\u5408\u6cd5\u5316\u3002\u5b8c\u6210\u8fd9\u4e2a\u4e2d\u95f4\u4eba\u653b\u51fb[2]\uff1a<\/p>\n

    \n
  1. \u5728ClientHello \u4e2d\u8981\u6c42\u4e00\u4e2a\u6807\u51c6\u7684RSA\u5bc6\u7801\u5957\u4ef6<\/li>\n
  2. MITM\u653b\u51fb\u8005\u5c06\u670d\u52a1\u5668\u6d88\u606f\u6539\u4e3a\u201cexport RSA\u201d<\/li>\n
  3. \u670d\u52a1\u5668\u4f7f\u7528512\u4f4dexport RSA\u8fdb\u884c\u54cd\u5e94\uff0c\u5e76\u4f7f\u7528\u5176\u957f\u671f\u5bc6\u94a5\u8fdb\u884c\u7b7e\u540d<\/li>\n
  4. \u6839\u636eOpenSSL \u7684\u6f0f\u6d1e\uff0c\u5ba2\u6237\u7aef\u4f1a\u63a5\u6536\u8fd9\u4e2a\u5f31\u952e<\/li>\n
  5. \u653b\u51fb\u8005\u5bf9\u8fd9\u4e2a\u5f31RSA\u8fdb\u884c\u7834\u89e3\uff0c\u6062\u590dRSA\u89e3\u5bc6\u5bc6\u94a5<\/li>\n
  6. \u5f53\u5ba2\u6237\u7aef\u5c06\u53d1\u9001\u9884\u4e3b\u5bc6\u94a5\u7ed9\u670d\u52a1\u5668\u65f6\uff0c\u653b\u51fb\u8005\u53d8\u53ef\u4ee5\u89e3\u5bc6\u5b83\uff0c\u6062\u590d\u51faTLS\u4e3b\u5bc6\u94a5<\/li>\n
  7. \u653b\u51fb\u5b8c\u6210\uff0c\u53ef\u4ee5\u6ce8\u5165\u4efb\u610f\u5185\u5bb9<\/li>\n<\/ol>\n

    \u5b9e\u9645\u4e0a\u4e0d\u4ec5\u4ec5\u662fOpenSSL\u6536\u5230\u8fd9\u4e2a\u653b\u51fb\u7684\u5f71\u54cd\uff0cAndroid\u7cfb\u7edf\u5f88\u591a\u4f7f\u7528\u7684OpenSSL\u5e93\u90fd\u5b58\u5728\u4e86\u98ce\u9669\uff0c\u800c\u4e14\u968f\u7740\u653b\u51fb\u9762\u7684\u6269\u5927\uff0cApple\u7684SSL\uff0fTLS\uff08Secure Transport\uff09\u548cMicrosoft\u7684SSL\/TLS\u5e93\uff08Schannel\uff09\u4e5f\u6536\u5230\u4e86\u5f71\u54cd\u3002\u5bf9\u4e8eFreak\u6f0f\u6d1e\uff0c\u53ea\u6709\u5efa\u8bae\u5404\u670d\u52a1\u79fb\u9664\u5bf9\u51fa\u53e3\u5bc6\u7801\u5957\u4ef6\u7684\u652f\u6301\uff0c\u56e0\u4e3a\u8fd9\u662f\u8fd9\u4e2a\u653b\u51fb\u7684\u5fc5\u8981\u6761\u4ef6\u3002<\/p>\n

    \u5728FREAK\u653b\u51fb\u4e4b\u540e\uff0c\u4eba\u4eec\u5c31\u628a\u6ce8\u610f\u529b\u96c6\u4e2d\u5230\u5b58\u5728\u7c7b\u4f3c\u95ee\u9898\u7684Diffe-Hellman\u5bc6\u94a5\u4ea4\u6362\u7b97\u6cd5\u4e0a\uff0c\u628a\u5f31\u5bc6\u94a5\u4ea4\u6362\u673a\u5236\u8fdb\u884c\u79fb\u690d\uff0c\u4ece\u800c\u53d1\u5e03\u4e86\u65b0\u7684\u6f0f\u6d1eLogjam\u3002\u8fd9\u4e2a\u653b\u51fb\u590d\u5236\u4e86Freak\u653b\u51fb\u7684\u539f\u7406\uff0c\u628aRSA_export \u66ff\u6362\u6210DHE_export\u3002\u548cFREAK\u4e0d\u540c\u7684\u662f\u670d\u52a1\u5668\u8981\u613f\u610f\u4f7f\u7528\u4e0d\u5b89\u5168\u7684DH\u53c2\u6570\uff0c\u8fd8\u9700\u8981\u7f13\u5b58\u4e34\u65f6\u7684DH\u5bc6\u94a5\uff0c\u6700\u540e\u8fd8\u8981\u6c42\u5ba2\u6237\u7aef\u80fd\u591f\u613f\u610f\u63a5\u53d7\u8fd9\u4e9b\u5f31DH\u53c2\u6570\u3002\u6240\u4ee5\u6700\u91cd\u8981\u7684\u539f\u56e0\u5c31\u662f\u6d4f\u89c8\u5668\u80fd\u591f\u63a5\u53d7\u4e0d\u5b89\u5168\u7684DH\u53c2\u6570\u3002\u5b9e\u9645\u4e0a\uff0c\u653b\u78341024\u4f4d\u53c2\u6570\u7684\u653b\u51fb\u8005\u80fd\u591f\u5bf96.56%\u7684HTTPS\u670d\u52a1\u5668\u8fdb\u884c\u88ab\u52a8\u653b\u51fb\uff0c\u653b\u7834\u4e8610\u4e2a\u901a\u7528\u7ec4\u7684\u653b\u51fb\u8005\u80fd\u591f\u5bf9\u7ea610%\u7684\u670d\u52a1\u5668\u8fdb\u884c\u653b\u51fb\u3002\u5bf9\u4e8eSSH\uff0c\u653b\u7834\u4e00\u4e2a\u6807\u51c6\u7ec4\uff0c\u80fd\u591f\u4f7f\u7528\u88ab\u52a8\u653b\u51fb\u7ea6360\u4e07\u7684\u670d\u52a1\u5668\uff0c\u800cIPsec\u5219\u80fd\u653b\u51fb\u8d85\u8fc760%\u7684\u670d\u52a1\u5668\uff0c\u5f71\u54cd\u529b\u975e\u5e38\u5de8\u5927\u3002<\/p>\n

    \u7f13\u89e3\u8fd9\u4e2a\u653b\u51fb\u5176\u5b9e\u4e5f\u4e0d\u96be\uff0c\u9996\u5148\u7981\u7528\u51fa\u53e3\u5957\u4ef6\uff0c\u7136\u540e\u5347\u7ea7DHE\u7684\u5957\u4ef6\uff0c\u786e\u4fdd\u4f7f\u7528\u7684\u662f2048\u4f4d\uff0c\u800c\u4e0d\u662f1024\u4f4d\uff0c\u6216\u8005\u5b8c\u5168\u7981\u7528DHE\u7b97\u6cd5\u3002<\/p>\n

    \u603b\u7ed3<\/b><\/strong><\/h4>\n

    SSL\/TLS\u00a0\u534f\u8bae\u8bbe\u8ba1\u662f\u6bd4\u8f83\u590d\u6742\u7684\uff0c\u5728\u5b9e\u73b0\u8fc7\u7a0b\u4e2d\u5f88\u96be\u5168\u90e8\u53c2\u7167RFC\u7684\u6807\u51c6\uff0c\u5bfc\u81f4\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u5b58\u5728\u7740\u5f88\u591a\u7684\u95ee\u9898\u3002\u968f\u7740\u8fd1\u51e0\u5e74\u5bf9TLS\u7814\u7a76\u7684\u6df1\u5165\uff0c\u5f88\u591a\u4ee5\u524d\u9690\u85cf\u5728\u5b9e\u73b0\u4e2d\u7684\u95ee\u9898\uff0c\u9690\u85cf\u5728\u5e93\u4e2d\u7684\u6f0f\u6d1e\u6b63\u5728\u9010\u6b65\u88ab\u53d1\u73b0\u3002\u901a\u8fc7\u4e0d\u65ad\u7684\u8fdb\u884c\u53d1\u6398\uff0c\u6539\u8fdb\uff0c\u5347\u7ea7\uff0cTLS\u4e5f\u8d8a\u6765\u8d8a\u80fd\u591f\u88ab\u5927\u4f17\u66f4\u52a0\u653e\u5fc3\u7684\u4f7f\u7528\u3002<\/p>\n

    \u53c2\u8003\u6587\u732e\uff1a<\/strong><\/p>\n

    [ 1 ] K. Bhargavan, C. Fournet, M. Kohlweiss. Proving the TLS Handshake Secure (As It Is). In CRYPTO, 2014<\/p>\n

    [ 2 ] B. Beurdouche, K. Bhargavan, A. Delignat-Lavaud. A Messy State of the Union: Taming the Composite State Machines of TLS. In IEEE Symposium on Security and Privacy (Oakland), 2015<\/p>\n

    [ 3 ] B. Beurdouche, A. Delignat-Lavaud, N. Koberssi. FLEXTLS: A Tool for Testing TLS Implementations. In USENIX Workshop on Offensive Technologies (WOOT), 2015<\/p>\n

    [ 4 ] Z. Durumeric, J. Kasten, F. Li. The matter of Heartbleed. In ACM, 2014<\/p>\n","protected":false},"excerpt":{"rendered":"

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