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TestCrossSiteScript.java

/*
 *
 * Paros and its related class files.
 * 
 * Paros is an HTTP/HTTPS proxy for assessing web application security.
 * Copyright (C) 2003-2004 Chinotec Technologies Company
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the Clarified Artistic License
 * as published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * Clarified Artistic License for more details.
 * 
 * You should have received a copy of the Clarified Artistic License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package org.parosproxy.paros.core.scanner.plugin;

import org.parosproxy.paros.Constant;
import org.parosproxy.paros.core.scanner.AbstractAppParamPlugin;
import org.parosproxy.paros.core.scanner.Alert;
import org.parosproxy.paros.core.scanner.Category;
import org.parosproxy.paros.network.HttpMessage;



/**
 *
 * To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Generation - Code and Comments
 */
00036 public class TestCrossSiteScript extends AbstractAppParamPlugin {

      // should not be changed to static as Global may not be ready
//    private static final String XSS1 = "<SCRIPT>alert(" + '"' + Constant.getEyeCatcher() + '"' + ");</SCRIPT>";
//    private static final String XSS2 = "<SCRIPT>alert(" + Constant.getEyeCatcher() + ");</SCRIPT>";   

    private static final String[] XSS = {
        "<SCRIPT>alert(" + '"' + Constant.getEyeCatcher() + '"' + ");</SCRIPT>",    // normal XSS
        "<SCRIPT>alert(" + Constant.getEyeCatcher() + ");</SCRIPT>",                // XSS without double quotes
        "bob@<SCRipt>alert(" + Constant.getEyeCatcher() + ")</scrIPT>.parosproxy.org"   // XSS to fulfill email check
        
    };

    
00050     public int getId() {
        return 40003;
    }

00054     public String getName() {
        return "Cross site scripting";
    }


    /* (non-Javadoc)
     * @see com.proofsecure.paros.core.scanner.Test#getDependency()
     */
00062     public String[] getDependency() {
        return null;
    }

    /* (non-Javadoc)
     * @see com.proofsecure.paros.core.scanner.Test#getDescription()
     */
00069     public String getDescription() {
        String msg = "Cross-site scripting or HTML injection is possible.  Malicious script may be injected into the browser which appeared to be genuine content from the original site.  "
            + "These scripts can be used to execute arbitrary code or steal customer sensitive information such as user password or cookies.\r\n"
            + "Very often this is in the form of a hyperlink with the injected script embeded in the query strings.  However, XSS is possible via FORM POST data, cookies, "
            + "user data sent from another user or shared data retrieved from database.\r\n"
            + "Currently this check does not verify XSS from cookie or database.  They should be checked manually if the application retrieve database records from another user's input.";
      
        return msg;
    }

    /* (non-Javadoc)
     * @see com.proofsecure.paros.core.scanner.Test#getCategory()
     */
00082     public int getCategory() {
        return Category.INJECTION;
    }

    /* (non-Javadoc)
     * @see com.proofsecure.paros.core.scanner.Test#getSolution()
     */
00089     public String getSolution() {
        String msg = "Do not trust client side input even if there is client side validation.  Sanitize potentially danger characters in the server side.  Very often filtering the <, >, \" characters prevented injected script to be executed in most cases.  "
            + "However, sometimes other danger meta-characters such as ' , (, ), /, &, ; etc are also needed.\r\n"
            + "In addition (or if these characters are needed), HTML encode meta-characters in the response.  For example, encode < as &lt;\r\n";
        return msg;
    }

    /* (non-Javadoc)
     * @see com.proofsecure.paros.core.scanner.Test#getReference()
     */
00099     public String getReference() {
        String msg = "<ul><li>The OWASP guide at http://www.owasp.org/documentation/guide</li>"
            + "<li>http://www.technicalinfo.net/papers/CSS.html</li>"
            + "<li>http://www.cgisecurity.org/articles/xss-faq.shtml</li>"
            + "<li>http://www.cert.org/tech_tips/malicious_code_FAQ.html</li>"
            + "<li>http://sandsprite.com/Sleuth/papers/RealWorld_XSS_1.html</li></ul>";
        return msg;
    }

    /* (non-Javadoc)
     * @see com.proofsecure.paros.core.scanner.AbstractTest#init()
     */
    public void init() {

    }
    


    public void scan(HttpMessage msg, String param, String value) {
        
            String result = null;
            int pos = 0;
//          // try XSS1        
//        
//          setParameter(msg, param, XSS1);
//
//          try {
//            sendAndReceive(msg);
//
//        } catch (Exception e) {
//            e.printStackTrace();
//        }
//
//          //    no need to have 200 response
//          //    if (getResponseHeader().getStatusCode() != HttpStatusCode.OK) {
//          //    return;
//          //}
//
//          result = msg.getResponseBody().toString();
//          pos = result.indexOf(XSS1);
//          if (pos >  -1) {
//                bingo(Alert.RISK_MEDIUM, Alert.WARNING, null, param + "=" + XSS1, null, msg);
//                return;
//          }
//          
//
//          // try XSS2
//          msg = getNewMsg();
//          setParameter(msg, param, XSS2);
//
//          try {
//            sendAndReceive(msg);
//        } catch (Exception e) {
//            return;
//        }
//
//          //    no need to have 200 response
//          //    if (getResponseHeader().getStatusCode() != HttpStatusCode.OK) {
//          //    return;
//          //}
//          
//          result = msg.getResponseBody().toString();
//          pos = result.indexOf(XSS2);
//          if (pos ==  -1) {
//                return;
//          }
//          
//          if (result.charAt(pos-1) != '"' && result.charAt(pos+XSS2.length()) != '"') {
//                // check if adjacent character is double quote.  If so, maybe OK
//                bingo(Alert.RISK_MEDIUM, Alert.SUSPICIOUS, null, param + "=" + XSS2, null, msg);
//                return;
//        }
        //=============
            for (int i=0;i<XSS.length;i++) {
                msg = getNewMsg();
                
                setParameter(msg, param, XSS[i]);
                
                try {
                    sendAndReceive(msg);
                    
                } catch (Exception e) {
                    e.printStackTrace();
                }
                
                //  no need to have 200 response
                //  if (getResponseHeader().getStatusCode() != HttpStatusCode.OK) {
                //  return;
                //}
                
                result = msg.getResponseBody().toString();
                pos = result.indexOf(XSS[i]);
            if (pos ==  -1) {
                continue;
            }

            if (i == 1) {
                // special handling for XSS without double quote
                
                if (result.charAt(pos-1) != '"' && result.charAt(pos+XSS[i].length()) != '"') {
                    // check if adjacent character is double quote.  If so, maybe OK
                    bingo(Alert.RISK_MEDIUM, Alert.SUSPICIOUS, null, param + "=" + XSS[i], null, msg);
                    return;
                }
            } else {
                    bingo(Alert.RISK_MEDIUM, Alert.WARNING, null, param + "=" + XSS[i], null, msg);
                return;
                }
            }
        
      }
      

}

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