main
project
JavaSource
WebContent
META-INF
WEB-INF
css
database
images
javascript
lesson_plans
lesson_solutions
AccessControlMatrix_files
BackDoors_files
BasicAuthentication_files
BlindSqlInjection_files
CSRF_files
ClientSideFiltering_files
ClientSideValidation_files
CommandInjection_files
ConcurrencyCart_files
DOMInjection_files
DOMXSS_files
DOS_Login_files
FailOpenAuthentication_files
ForcedBrowsing_files
ForgotPassword_files
HiddenFieldTampering_files
HtmlClues_files
HttpBasics_files
HttpOnly_files
HttpSplitting_files
JSONInjection_files
JavaScriptValidation_files
Lab Access Control
Lab SQL Injection
Lab XSS
LogSpoofing_files
MultiLevelLogin1
MultiLevelLogin2
PasswordStrength_files
PathBasedAccessControl_files
ReflectedXSS_files
RemoteAdminFlaw_files
SessionFixation_files
SilentTransactions_files
SoapRequest_files
SqlNumericInjection_files
SqlStringInjection_files
StoredXSS_files
ThreadSafetyProblem_files
TraceXSS_files
UncheckedEmail_files
WSDLScanning_files
WeakAuthenticationCookie_files
WeakSessionID_files
WsSAXInjection_files
WsSqlInjection_files
XMLInjection_files
XPATHInjection_files
AccessControlMatrix.html
BackDoors.html
BasicAuthentication.html
BlindSqlInjection.html
CSRF.html
ClientSideFiltering.html
ClientSideValidation.html
CommandInjection.html
ConcurrencyCart.html
DOMInjection.html
DOMXSS.html
DOS_Login.html
DangerousEval.html
Encoding.html
FailOpenAuthentication.html
ForcedBrowsing.html
ForgotPassword.html
HiddenFieldTampering.html
HtmlClues.html
HttpBasics.html
HttpOnly.html
HttpSplitting.html
JSONInjection.html
JavaScriptValidation.html
LogSpoofing.html
PasswordStrength.html
PathBasedAccessControl.html
Phishing.html
ReflectedXSS.html
RemoteAdminFlaw.html
SessionFixation.html
SilentTransactions.html
SoapRequest.html
SqlNumericInjection.html
SqlStringInjection.html
StoredXss.html
ThreadSafetyProblem.html
TraceXSS.html
UncheckedEmail.html
WSDLScanning.html
WeakAuthenticationCookie.html
WeakSessionID.html
WsSAXInjection.html
WsSqlInjection.html
XMLInjection.html
XPATHInjection.html
formate.css
lessons
users
main.jsp
sideWindow.jsp
webgoat.jsp
webgoat_challenge.jsp
config
doc
build.xml
Eclipse-Workspace.zip
HOW TO create the WebGoat workspace.txt
build.xml
eclipse.bat
readme.txt
webgoat for SQL Server.bat
webgoat.bat
webgoat.sh
webgoat_8080.bat
webscarab.bat
* Solutions added * Bugfixes * Introduction added (including how to start with webgoat and useful tools) * New lesson: Password strength * New lessons: Multi Level Login * Not yet working new lesson: Session fixation (inital release) git-svn-id: http://webgoat.googlecode.com/svn/trunk/webgoat@301 4033779f-a91e-0410-96ef-6bf7bf53c507
866 lines
40 KiB
HTML
866 lines
40 KiB
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<p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'>Lesson
|
||
Plan Title:</span></b><span style='font-family:"Arial","sans-serif"'> How to
|
||
Perform DOM Injection Attack. <o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
|
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|
||
<p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'>Concept /
|
||
Topic To Teach:</span></b><span style='font-family:"Arial","sans-serif"'> <o:p></o:p></span></p>
|
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|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>How to
|
||
perform DOM injection attacks. <o:p></o:p></span></p>
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|
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|
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<p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'>How the
|
||
attacks works:</span></b><span style='font-family:"Arial","sans-serif"'> <o:p></o:p></span></p>
|
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|
||
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|
||
specially the ones that uses AJAX manipulates and updates the DOM directly
|
||
using JavaScript, DHTML and eval() method.<br>
|
||
An attacker may take advantage of that by intercepting the reply and try to
|
||
inject some javascript commands to exploit his attacks. <o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
|
||
|
||
<p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'>General
|
||
Goal(s):</span></b><span style='font-family:"Arial","sans-serif"'> <o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><!-- Start Instructions -->*
|
||
Your victim is a system that takes an activation key to allow you to use it.<br>
|
||
* Your goal should be to try to get to enable the activate button.<br>
|
||
* Take some time to see the HTML source in order to understand how the key
|
||
validation process works.<o:p></o:p></span></p>
|
||
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|
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|
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|
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src="/WebGoat/lesson_solutions/DOMInjection_files/image002.jpg" v:shapes="Picture_x0020_49"><![endif]></span></p>
|
||
|
||
<p class=MsoCaption>Figure <!--[if supportFields]><span style='mso-element:
|
||
field-begin'></span><span style='mso-spacerun:yes'><3E></span>SEQ Figure \* ARABIC
|
||
<span style='mso-element:field-separator'></span><![endif]--><span
|
||
style='mso-no-proof:yes'>1</span><!--[if supportFields]><span style='mso-element:
|
||
field-end'></span><![endif]--> AJAX Security - DOM Injection</p>
|
||
|
||
<p class=MsoNormal><o:p> </o:p></p>
|
||
|
||
<p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'>Solution:<o:p></o:p></span></b></p>
|
||
|
||
<p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></b></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>AJAX requires
|
||
XML communication between the browser and the web application. When you view
|
||
the source of the HTML page, you will notice the usage of XMLHttpRequest:<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><script><o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>function
|
||
validate() {<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>var keyField
|
||
= document.getElementById('key');<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>var url =
|
||
'/WebGoat/attack?Screen=80&menu=1150&from=ajax&key=' +
|
||
encodeURIComponent(keyField.value);<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>if (typeof
|
||
XMLHttpRequest != 'undefined') {<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal style='text-indent:36.0pt'><span style='font-family:"Arial","sans-serif"'>req
|
||
= new XMLHttpRequest();<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>} else if
|
||
(window.ActiveXObject) {<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal style='text-indent:36.0pt'><span style='font-family:"Arial","sans-serif"'>req
|
||
= new ActiveXObject('Microsoft.XMLHTTP');<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD><EFBFBD> </span>}<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD><EFBFBD> </span>req.open('GET', url, true);<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD><EFBFBD> </span>req.onreadystatechange = callback;<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD><EFBFBD> </span>req.send(null);<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>}<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>function
|
||
callback() {<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD><EFBFBD><EFBFBD> </span>if (req.readyState == 4) { <o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> </span>if (req.status == 200) { <o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> </span>var message = req.responseText;<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-tab-count:3'><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> </span><span
|
||
style='mso-spacerun:yes'><EFBFBD></span>eval(message);<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> </span>}}}<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'></script><o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>The XML
|
||
response contains JavaScript that will activate the button so that you are able
|
||
to click on it. This requires you to inject JavaScript to manipulate the
|
||
Document Object Model of the HTML page in the browser. This requires
|
||
intercepting the HTTP response in WebScarab!<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Enter a
|
||
license key (for example 'a') and intercept the HTTP Request and HTTP Response
|
||
in WebScarab.<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
|
||
|
||
<p class=MsoNormal style='page-break-after:avoid'><span style='font-family:
|
||
"Arial","sans-serif";mso-no-proof:yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_50"
|
||
o:spid="_x0000_i1029" type="#_x0000_t75" style='width:481.5pt;height:345pt;
|
||
visibility:visible;mso-wrap-style:square'>
|
||
<v:imagedata src="/WebGoat/lesson_solutions/DOMInjection_files/image003.png" o:title=""/>
|
||
</v:shape><![endif]--><![if !vml]><img width=642 height=460
|
||
src="/WebGoat/lesson_solutions/DOMInjection_files/image004.jpg" v:shapes="Picture_x0020_50"><![endif]></span></p>
|
||
|
||
<p class=MsoCaption>Figure <!--[if supportFields]><span style='mso-element:
|
||
field-begin'></span><span style='mso-spacerun:yes'><3E></span>SEQ Figure \* ARABIC
|
||
<span style='mso-element:field-separator'></span><![endif]--><span
|
||
style='mso-no-proof:yes'>2</span><!--[if supportFields]><span style='mso-element:
|
||
field-end'></span><![endif]--> HTTP Request</p>
|
||
|
||
<p class=MsoNormal><o:p> </o:p></p>
|
||
|
||
<p class=MsoNormal style='page-break-after:avoid'><span style='mso-no-proof:
|
||
yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_51" o:spid="_x0000_i1028"
|
||
type="#_x0000_t75" style='width:481.5pt;height:345pt;visibility:visible;
|
||
mso-wrap-style:square'>
|
||
<v:imagedata src="/WebGoat/lesson_solutions/DOMInjection_files/image005.png" o:title=""/>
|
||
</v:shape><![endif]--><![if !vml]><img width=642 height=460
|
||
src="/WebGoat/lesson_solutions/DOMInjection_files/image006.jpg" v:shapes="Picture_x0020_51"><![endif]></span></p>
|
||
|
||
<p class=MsoCaption>Figure <!--[if supportFields]><span style='mso-element:
|
||
field-begin'></span><span style='mso-spacerun:yes'><3E></span>SEQ Figure \* ARABIC
|
||
<span style='mso-element:field-separator'></span><![endif]--><span
|
||
style='mso-no-proof:yes'>3</span><!--[if supportFields]><span style='mso-element:
|
||
field-end'></span><![endif]--> HTTP Response</p>
|
||
|
||
<p class=MsoNormal><o:p> </o:p></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Intercept the
|
||
reply and replace the body with document.forms[0].SUBMIT.disabled = false;<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
|
||
|
||
<p class=MsoNormal style='page-break-after:avoid'><span style='font-family:
|
||
"Arial","sans-serif";mso-no-proof:yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_52"
|
||
o:spid="_x0000_i1027" type="#_x0000_t75" style='width:481.5pt;height:345pt;
|
||
visibility:visible;mso-wrap-style:square'>
|
||
<v:imagedata src="/WebGoat/lesson_solutions/DOMInjection_files/image007.png" o:title=""/>
|
||
</v:shape><![endif]--><![if !vml]><img width=642 height=460
|
||
src="/WebGoat/lesson_solutions/DOMInjection_files/image008.jpg" v:shapes="Picture_x0020_52"><![endif]></span></p>
|
||
|
||
<p class=MsoCaption>Figure <!--[if supportFields]><span style='mso-element:
|
||
field-begin'></span><span style='mso-spacerun:yes'><3E></span>SEQ Figure \* ARABIC
|
||
<span style='mso-element:field-separator'></span><![endif]--><span
|
||
style='mso-no-proof:yes'>4</span><!--[if supportFields]><span style='mso-element:
|
||
field-end'></span><![endif]--> Updated HTTP Response</p>
|
||
|
||
<p class=MsoNormal><o:p> </o:p></p>
|
||
|
||
<p class=MsoNormal>The button <20>Activate!<21> is now enabled!</p>
|
||
|
||
<p class=MsoNormal><o:p> </o:p></p>
|
||
|
||
<p class=MsoNormal style='page-break-after:avoid'><span style='mso-no-proof:
|
||
yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_53" o:spid="_x0000_i1026"
|
||
type="#_x0000_t75" style='width:480pt;height:277.5pt;visibility:visible;
|
||
mso-wrap-style:square'>
|
||
<v:imagedata src="/WebGoat/lesson_solutions/DOMInjection_files/image009.png" o:title=""/>
|
||
</v:shape><![endif]--><![if !vml]><img width=640 height=370
|
||
src="/WebGoat/lesson_solutions/DOMInjection_files/image010.jpg" v:shapes="Picture_x0020_53"><![endif]></span></p>
|
||
|
||
<p class=MsoCaption>Figure <!--[if supportFields]><span style='mso-element:
|
||
field-begin'></span><span style='mso-spacerun:yes'><3E></span>SEQ Figure \* ARABIC
|
||
<span style='mso-element:field-separator'></span><![endif]--><span
|
||
style='mso-no-proof:yes'>5</span><!--[if supportFields]><span style='mso-element:
|
||
field-end'></span><![endif]--> Activate! Button is enabled</p>
|
||
|
||
<p class=MsoNormal><o:p> </o:p></p>
|
||
|
||
<p class=MsoNormal style='page-break-after:avoid'><span style='mso-no-proof:
|
||
yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_54" o:spid="_x0000_i1025"
|
||
type="#_x0000_t75" style='width:480pt;height:277.5pt;visibility:visible;
|
||
mso-wrap-style:square'>
|
||
<v:imagedata src="/WebGoat/lesson_solutions/DOMInjection_files/image011.png" o:title=""/>
|
||
</v:shape><![endif]--><![if !vml]><img width=640 height=370
|
||
src="/WebGoat/lesson_solutions/DOMInjection_files/image012.jpg" v:shapes="Picture_x0020_54"><![endif]></span></p>
|
||
|
||
<p class=MsoCaption>Figure <!--[if supportFields]><span style='mso-element:
|
||
field-begin'></span><span style='mso-spacerun:yes'><3E></span>SEQ Figure \* ARABIC
|
||
<span style='mso-element:field-separator'></span><![endif]--><span
|
||
style='mso-no-proof:yes'>6</span><!--[if supportFields]><span style='mso-element:
|
||
field-end'></span><![endif]--> Lesson completed</p>
|
||
|
||
<p class=MsoNormal><o:p> </o:p></p>
|
||
|
||
</div>
|
||
<table align='RIGHT' cellspacing='0' width='90%' border='0' cellpadding='0'>
|
||
<tr>
|
||
<td valign='MIDDLE' width='100%' align='RIGHT class=MsoNormal' style='font-family:"Arial","sans-serif"'>
|
||
Solution by Erwin Geirnaert
|
||
</td>
|
||
<td valign='MIDDLE' align='RIGHT'><img hspace='0' vspace='0' border='0' alt='ZION SECURITY' src='images/logos/zionsecurity.gif'></td>
|
||
</tr>
|
||
</table>
|
||
|
||
</body>
|
||
|
||
</html>
|