bypass front-end restrictions (javascript validation)
This commit is contained in:
Michal Smolík
Nanne Baars
parent
01421ca822
commit
870fa000aa
34
webgoat-lessons/bypass-restrictions/pom.xml
Executable file
34
webgoat-lessons/bypass-restrictions/pom.xml
Executable file
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<artifactId>bypass-restrictions</artifactId>
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<packaging>jar</packaging>
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<parent>
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<groupId>org.owasp.webgoat.lesson</groupId>
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<artifactId>webgoat-lessons-parent</artifactId>
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<version>8.0-SNAPSHOT</version>
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</parent>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework.security</groupId>
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<artifactId>spring-security-test</artifactId>
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<version>4.1.3.RELEASE</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>${junit.version}</version>
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<type>jar</type>
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<scope>test</scope>
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</dependency>
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</dependencies>
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</project>
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package org.owasp.webgoat.plugin;
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import com.beust.jcommander.internal.Lists;
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import org.owasp.webgoat.lessons.Category;
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import org.owasp.webgoat.lessons.NewLesson;
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import java.util.List;
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/**
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* ************************************************************************************************
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* This file is part of WebGoat, an Open Web Application Security Project utility. For details,
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* please see http://www.owasp.org/
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* <p>
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* Copyright (c) 2002 - 20014 Bruce Mayhew
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* <p>
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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* <p>
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
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* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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* <p>
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* You should have received a copy of the GNU General Public License along with this program; if
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* not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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* <p>
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* Getting Source ==============
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* <p>
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* Source for this application is maintained at https://github.com/WebGoat/WebGoat, a repository for free software
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* projects.
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* <p>
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*
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* @author WebGoat
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* @version $Id: $Id
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* @since October 12, 2016
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*/
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public class BypassRestrictions extends NewLesson {
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@Override
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public Category getDefaultCategory() {
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return Category.PARAMETER_TAMPERING;
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}
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@Override
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public List<String> getHints() {
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return Lists.newArrayList();
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}
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@Override
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public Integer getDefaultRanking() {
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return 2;
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}
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@Override
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public String getTitle() {
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return "bypass-restrictions.title";
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}
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@Override
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public String getId() {
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return "BypassRestrictions";
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}
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}
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package org.owasp.webgoat.plugin;
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import org.owasp.webgoat.assignments.AssignmentEndpoint;
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import org.owasp.webgoat.assignments.AssignmentPath;
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import org.owasp.webgoat.assignments.AttackResult;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RequestMethod;
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import org.springframework.web.bind.annotation.RequestParam;
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import org.springframework.web.bind.annotation.ResponseBody;
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import javax.servlet.http.HttpServletRequest;
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import java.io.IOException;
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/**
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* *************************************************************************************************
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*
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*
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* This file is part of WebGoat, an Open Web Application Security Project
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* utility. For details, please see http://www.owasp.org/
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*
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* Copyright (c) 2002 - 20014 Bruce Mayhew
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* Getting Source ==============
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*
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* Source for this application is maintained at https://github.com/WebGoat/WebGoat, a repository
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* for free software projects.
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*
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* For details, please see http://webgoat.github.io
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*
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* @author Bruce Mayhew <a href="http://code.google.com/p/webgoat">WebGoat</a>
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* @created October 28, 2003
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*/
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@AssignmentPath("/BypassRestrictions/FieldRestrictions")
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public class BypassRestrictionsFieldRestrictions extends AssignmentEndpoint {
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@RequestMapping(method = RequestMethod.POST)
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public
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@ResponseBody
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AttackResult completed(@RequestParam String select, @RequestParam String radio, @RequestParam String checkbox, @RequestParam String shortInput) throws IOException {
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if (select.toString().equals("option1") || select.toString().equals("option2")) {
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return trackProgress(failed().build());
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}
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if (radio.toString().equals("option1") || radio.toString().equals("option2")) {
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return trackProgress(failed().build());
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}
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if (checkbox.toString().equals("on") || checkbox.toString().equals("off")) {
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return trackProgress(failed().build());
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}
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if (shortInput.toString().length() <= 5) {
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return trackProgress(failed().build());
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}
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/*if (disabled == null) {
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return trackProgress(failed().build());
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}
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if (submit.toString().equals("submit")) {
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return trackProgress(failed().build());
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}*/
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return trackProgress(success().build());
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}
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}
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package org.owasp.webgoat.plugin;
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import org.owasp.webgoat.assignments.AssignmentEndpoint;
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import org.owasp.webgoat.assignments.AssignmentPath;
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import org.owasp.webgoat.assignments.AttackResult;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RequestMethod;
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import org.springframework.web.bind.annotation.RequestParam;
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import org.springframework.web.bind.annotation.ResponseBody;
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import javax.servlet.http.HttpServletRequest;
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import java.io.IOException;
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/**
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* *************************************************************************************************
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*
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*
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* This file is part of WebGoat, an Open Web Application Security Project
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* utility. For details, please see http://www.owasp.org/
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*
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* Copyright (c) 2002 - 20014 Bruce Mayhew
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* Getting Source ==============
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*
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* Source for this application is maintained at https://github.com/WebGoat/WebGoat, a repository
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* for free software projects.
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*
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* For details, please see http://webgoat.github.io
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*
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* @author Bruce Mayhew <a href="http://code.google.com/p/webgoat">WebGoat</a>
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* @created October 28, 2003
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*/
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@AssignmentPath("/BypassRestrictions/frontendValidation")
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public class BypassRestrictionsFrontendValidation extends AssignmentEndpoint {
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@RequestMapping(method = RequestMethod.POST)
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public
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@ResponseBody
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AttackResult completed(@RequestParam String field1, @RequestParam String field2, @RequestParam String field3, @RequestParam String field4, @RequestParam String field5, @RequestParam String field6, @RequestParam String field7, @RequestParam Integer error) throws IOException {
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String regex1="^[a-z]{3}$";
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String regex2="^[0-9]{3}$";
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String regex3="^[a-zA-Z0-9 ]*$";
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String regex4="^(one|two|three|four|five|six|seven|eight|nine)$";
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String regex5="^\\d{5}$";
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String regex6="^\\d{5}(-\\d{4})?$";
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String regex7="^[2-9]\\d{2}-?\\d{3}-?\\d{4}$";
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if (error>0) {
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return trackProgress(failed().build());
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}
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if (field1.matches(regex1)) {
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return trackProgress(failed().build());
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}
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if (field2.matches(regex2)) {
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return trackProgress(failed().build());
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}
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if (field3.matches(regex3)) {
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return trackProgress(failed().build());
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}
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if (field4.matches(regex4)) {
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return trackProgress(failed().build());
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}
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if (field5.matches(regex5)) {
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return trackProgress(failed().build());
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}
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if (field6.matches(regex6)) {
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return trackProgress(failed().build());
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}
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if (field7.matches(regex7)) {
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return trackProgress(failed().build());
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}
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return trackProgress(success().build());
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}
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}
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<!DOCTYPE html>
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<html xmlns:th="http://www.thymeleaf.org">
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<div class="lesson-page-wrapper">
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<!-- reuse this lesson-page-wrapper block for each 'page' of content in your lesson -->
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<!-- include content here. Content will be presented via asciidocs files,
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which you put in src/main/resources/plugin/lessonplans/{lang}/{fileName}.adoc -->
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<div class="adoc-content" th:replace="doc:BypassRestrictions_Intro.adoc"></div>
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</div>
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<div class="lesson-page-wrapper">
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<!-- stripped down without extra comments -->
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<div class="adoc-content" th:replace="doc:BypassRestrictions_FieldRestrictions.adoc"></div>
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<div class="attack-container">
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<div class="assignment-success"><i class="fa fa-2 fa-check hidden" aria-hidden="true"></i></div>
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<form class="attack-form" accept-charset="UNKNOWN" name="fieldRestrictions"
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method="POST"
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action="/WebGoat/BypassRestrictions/FieldRestrictions"
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enctype="application/json;charset=UTF-8">
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<div>Select field with two possible values</div>
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<select name="select">
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<option value="option1">Option 1</option>
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<option value="option2">Option 2</option>
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</select>
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<div>Radio button with two possible values</div>
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<input type="radio" name="radio" value="option1" checked="checked"/> Option 1<br />
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<input type="radio" name="radio" value="option2" /> Option 2<br />
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<div>Checkbox: value either on or off</div>
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<input type="checkbox" name="checkbox" checked="checked"/> Checkbox
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<div>Input restricted to max 5 characters</div>
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<input type="text" value="12345" name="shortInput" maxlength="5"/>
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<div>Disabled input field</div>
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<input type="submit" value="submit"/>
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</form>
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<div class="attack-feedback"></div>
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<div class="attack-output"></div>
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</div>
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</div>
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<div class="lesson-page-wrapper">
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<div class="adoc-content" th:replace="doc:BypassRestrictions_FrontendValidation.adoc"></div>
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<div class="attack-container">
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<div class="assignment-success"><i class="fa fa-2 fa-check hidden" aria-hidden="true"></i></div>
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<form class="attack-form" accept-charset="UNKNOWN" name="frontendValidation"
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id="frontendValidation"
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method="POST"
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action="/WebGoat/BypassRestrictions/frontendValidation/"
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enctype="application/json;charset=UTF-8"
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onsubmit="return validate()">
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<div>
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Field1: exactly three lowercase characters(^[a-z]{3}$)
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</div>
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<div>
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<textarea cols="25" name="field1" rows="1">abc</textarea>
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</div>
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<p></p>
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<div>Field2: exactly three digits(^[0-9]{3}$)</div>
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<div>
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<textarea cols="25" name="field2" rows="1">123</textarea>
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</div>
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<p></p>
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<div>Field3: letters, numbers, and space only(^[a-zA-Z0-9 ]*$)</div>
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<div>
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<textarea cols="25" name="field3" rows="1">abc 123 ABC</textarea>
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</div>
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<p></p>
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<div>Field4: enumeration of numbers (^(one|two|three|four|five|six|seven|eight|nine)$)</div>
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<div>
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<textarea cols="25" name="field4" rows="1">seven</textarea>
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</div>
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<p></p>
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<div>Field5: simple zip code (^\d{5}$)</div>
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<div>
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<textarea cols="25" name="field5" rows="1">01101</textarea>
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</div>
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<p></p>
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<div>Field6: zip with optional dash four (^\d{5}(-\d{4})?$)</div>
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<div>
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<textarea cols="25" name="field6" rows="1">90210-1111</textarea>
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</div>
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<p></p>
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<div>Field7: US phone number with or without dashes (^[2-9]\d{2}-?\d{3}-?\d{4}$)</div>
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<div>
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<textarea cols="25" name="field7" rows="1">301-604-4882</textarea>
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</div>
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<input type="hidden" value="" name="error" />
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<p><input type="submit" value="Submit" /></p>
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</form>
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<script>
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let regex1=/^[a-z]{3}$/;
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let regex2=/^[0-9]{3}$/;
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let regex3=/^[a-zA-Z0-9 ]*$/;
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|
let regex4=/^(one|two|three|four|five|six|seven|eight|nine)$/;
|
||||||
|
let regex5=/^\d{5}$/;
|
||||||
|
let regex6=/^\d{5}(-\d{4})?$/;
|
||||||
|
let regex7=/^[2-9]\d{2}-?\d{3}-?\d{4}$/;
|
||||||
|
var validate = function() {
|
||||||
|
let msg='JavaScript found form errors';
|
||||||
|
let err=0;
|
||||||
|
if (!regex1.test(document.frontendValidation.field1.value)) {err+=1; msg+='\n bad field1';}
|
||||||
|
if (!regex2.test(document.frontendValidation.field2.value)) {err+=1; msg+='\n bad field2';}
|
||||||
|
if (!regex3.test(document.frontendValidation.field3.value)) {err+=1; msg+='\n bad field3';}
|
||||||
|
if (!regex4.test(document.frontendValidation.field4.value)) {err+=1; msg+='\n bad field4';}
|
||||||
|
if (!regex5.test(document.frontendValidation.field5.value)) {err+=1; msg+='\n bad field5';}
|
||||||
|
if (!regex6.test(document.frontendValidation.field6.value)) {err+=1; msg+='\n bad field6';}
|
||||||
|
if (!regex7.test(document.frontendValidation.field7.value)) {err+=1; msg+='\n bad field7';}
|
||||||
|
document.frontendValidation.error.value = err
|
||||||
|
if ( err > 0 ) {
|
||||||
|
alert(msg)
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
</script>
|
||||||
|
<div class="attack-feedback"></div>
|
||||||
|
<div class="attack-output"></div>
|
||||||
|
</div>
|
||||||
|
</div>
|
||||||
|
</html>
|
||||||
@ -0,0 +1,4 @@
|
|||||||
|
bypass-restrictions.title=Bypass front-end restrictions
|
||||||
|
|
||||||
|
bypass-restrictions.intercept.success=Well done, you intercepted the request as expected
|
||||||
|
bypass-restrictions.intercept.failure=Please try again. Make sure to make all the changes. And case sensitivity may matter ... or not, you never know!
|
||||||
@ -0,0 +1,6 @@
|
|||||||
|
== Field Restrictions
|
||||||
|
In most browsers, client has complete or almost complete control over HTML part
|
||||||
|
of the webpage. They can alter values or restrictions to fit their preference.
|
||||||
|
|
||||||
|
=== Task
|
||||||
|
Send a request that bypasses restrictions of all four of these fields
|
||||||
@ -0,0 +1,8 @@
|
|||||||
|
== Validation
|
||||||
|
Often, there is some mechanism in place to prevent users from sending altered
|
||||||
|
field values to server, such as validation before sending. Most of popular browsers
|
||||||
|
such as Chrome don't allow editing scripts during runtime. We will have to circumvent
|
||||||
|
the validation some other way.
|
||||||
|
|
||||||
|
=== Task
|
||||||
|
Send a request that does not fit the regular expression above the field in all fields.
|
||||||
@ -0,0 +1,10 @@
|
|||||||
|
|
||||||
|
== Concept
|
||||||
|
Users have a great degree of control over the front-end of the web application.
|
||||||
|
They can alter HTML code, sometimes also scripts. This is why
|
||||||
|
apps that require certain format of input should also validate on server-side.
|
||||||
|
|
||||||
|
== Goals
|
||||||
|
* The user should have a basic knowledge of HTML
|
||||||
|
* The user should be able to tamper a request before sending (with proxy or other tool)
|
||||||
|
* The user will be able to tamper with field restrictions and bypass client-side validation
|
||||||
@ -14,6 +14,7 @@
|
|||||||
</parent>
|
</parent>
|
||||||
|
|
||||||
<modules>
|
<modules>
|
||||||
|
<module>bypass-restrictions</module>
|
||||||
<module>challenge</module>
|
<module>challenge</module>
|
||||||
<module>client-side-filtering</module>
|
<module>client-side-filtering</module>
|
||||||
<module>cross-site-scripting</module>
|
<module>cross-site-scripting</module>
|
||||||
|
|||||||
@ -91,6 +91,11 @@
|
|||||||
<!--<artifactId>challenge</artifactId>-->
|
<!--<artifactId>challenge</artifactId>-->
|
||||||
<!--<version>${project.version}</version>-->
|
<!--<version>${project.version}</version>-->
|
||||||
<!--</dependency>-->
|
<!--</dependency>-->
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.owasp.webgoat.lesson</groupId>
|
||||||
|
<artifactId>bypass-restrictions</artifactId>
|
||||||
|
<version>${project.version}</version>
|
||||||
|
</dependency>
|
||||||
<dependency>
|
<dependency>
|
||||||
<groupId>org.owasp.webgoat.lesson</groupId>
|
<groupId>org.owasp.webgoat.lesson</groupId>
|
||||||
<artifactId>client-side-filtering</artifactId>
|
<artifactId>client-side-filtering</artifactId>
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user