wirth.marcel 82e32acb77 * Hints added
* 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@301 4033779f-a91e-0410-96ef-6bf7bf53c507
2008-04-07 14:28:38 +00:00

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<div class=Section1>
<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 JSON Injection <o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></b></p>
<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>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>This lesson
teaches how to perform JSON Injection Attacks. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></p>
<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>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>JavaScript Object
Notation (JSON) is a simple and effective lightweight data exchange format.
JSON can be in a lot of forms such as arrays, lists, hashtables and other data
structures. JSON is widely used in AJAX and Web2.0 application and is favored
by programmers over XML because of its ease of use and speed. However, JSON,
like XML is prone to Injection attacks. A malicious attacker can inject the
reply from the server and inject some arbitrary values in there. <o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></b></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 -->You
are traveling from Boston, MA- Airport code BOS to Seattle, WA - Airport code
SEA.<br>
Once you enter the three digit code of the airport, an AJAX request will be
executed asking for the ticket price.<br>
You will notice that there are two flights available, an expensive one with no
stops and another cheaper one with 2 stops.<br>
Your goal is to try to get the one with no stops but for a cheaper price.</span><span
style='font-family:"Arial","sans-serif";mso-fareast-language:JA'><o:p></o:p></span></p>
<p class=MsoNormal><o:p>&nbsp;</o:p></p>
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src="/WebGoat/lesson_solutions/JSONInjection_files/image013.jpg" v:shapes="Picture_x0020_77"><![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 - JSON Injection</p>
<p class=MsoNormal><o:p>&nbsp;</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><span style='font-family:"Arial","sans-serif";mso-bidi-font-weight:
bold'>Like with the previous lessons you need to manipulate the HTTP Response
using WebScarab.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";mso-bidi-font-weight:
bold'><o:p>&nbsp;</o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";mso-bidi-font-weight:
bold'>Examine the normal flow by entering the airport code BOS and SEA and
intercept the HTTP Request and the HTTP Response in WebScarab.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";mso-bidi-font-weight:
bold'><o:p>&nbsp;</o:p></span></p>
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<p class=MsoCaption>Figure <!--[if supportFields]><span style='mso-element:
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<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]--> Intercept HTTP Request</p>
<p class=MsoNormal><o:p>&nbsp;</o:p></p>
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<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]--> Intercept HTTP Response</p>
<p class=MsoNormal><o:p>&nbsp;</o:p></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Change the
price for the expensive flight of $600 to $100 and click "Accept changes".<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></p>
<p class=MsoNormal><o:p>&nbsp;</o:p></p>
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<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 price</p>
<p class=MsoNormal><o:p>&nbsp;</o:p></p>
<p class=MsoNormal style='page-break-after:avoid'><span style='mso-no-proof:
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src="/WebGoat/lesson_solutions/JSONInjection_files/image017.jpg" v:shapes="Picture_x0020_81"><![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]--> Injected result</p>
<p class=MsoNormal><o:p>&nbsp;</o:p></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Select the flight
with no stops and the updated price and click "Submit".<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></p>
<p class=MsoNormal style='page-break-after:avoid'><span style='font-family:
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<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<span style='font-family:"Arial","sans-serif"'><o:p></o:p></span></p>
<p class=MsoNormal><o:p>&nbsp;</o:p></p>
</div>
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Solution by Erwin Geirnaert
</td>
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