82e32acb77
* 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
686 lines
34 KiB
HTML
686 lines
34 KiB
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|
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<div class=Section1>
|
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|
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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
|
||
Exploit Hidden Fields <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"'>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"'>Developers
|
||
will use hidden fields for tracking, login, pricing, etc.. information on a
|
||
loaded page. While this is a convenient and easy mechanism for the developer,
|
||
they often don't validate the information that is received from the hidden
|
||
field. This lesson will teach the attacker to find and modify hidden fields to
|
||
obtain a product for a price other than the price specified <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"'>The user
|
||
should be able to exploit a hidden field to obtain a product at an incorrect
|
||
price.<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:
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"Arial","sans-serif";mso-no-proof:yes'><!--[if gte vml 1]><v:shapetype id="_x0000_t75"
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|
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|
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style='width:480pt;height:276.75pt;visibility:visible;mso-wrap-style:square'>
|
||
<v:imagedata src="/WebGoat/lesson_solutions/HiddenFieldTampering_files/image001.png" o:title=""/>
|
||
</v:shape><![endif]--><![if !vml]><img width=640 height=369
|
||
src="/WebGoat/lesson_solutions/HiddenFieldTampering_files/image011.jpg" v:shapes="Picture_x0020_103"><![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]--> Lesson 4<span style='font-family:"Arial","sans-serif"'><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 style='mso-bidi-font-weight:normal'><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"'><o:p> </o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>To change the
|
||
hidden field you need to start your favorite HTTP Interceptor. You can use
|
||
WebScarab from OWASP to intercept the request and change the hidden field.
|
||
Configure your browser to use a local proxy. In Internet Explorer you can do
|
||
this via "Tools" <20> "Internet Options" <20> "Connections" <20> "LAN Settings". You
|
||
must define proxy "localhost" with port 8008.<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_104"
|
||
o:spid="_x0000_i1028" type="#_x0000_t75" style='width:4in;height:254.25pt;
|
||
visibility:visible;mso-wrap-style:square'>
|
||
<v:imagedata src="/WebGoat/lesson_solutions/HiddenFieldTampering_files/image003.png" o:title=""/>
|
||
</v:shape><![endif]--><![if !vml]><img width=384 height=339
|
||
src="/WebGoat/lesson_solutions/HiddenFieldTampering_files/image012.jpg" v:shapes="Picture_x0020_104"><![endif]></span><span
|
||
style='font-family:"Arial","sans-serif"'><o:p></o:p></span></p>
|
||
|
||
<p class=MsoCaption><span style='font-family:"Arial","sans-serif"'>Figure </span><!--[if supportFields]><span
|
||
style='font-family:"Arial","sans-serif"'><span style='mso-element:field-begin'></span><span
|
||
style='mso-spacerun:yes'><3E></span>SEQ Figure \* ARABIC <span style='mso-element:
|
||
field-separator'></span></span><![endif]--><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-no-proof:yes'>2</span></span><!--[if supportFields]><span
|
||
style='font-family:"Arial","sans-serif"'><span style='mso-element:field-end'></span></span><![endif]--><span
|
||
style='font-family:"Arial","sans-serif"'> Set local proxy in Internet Explorer<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"'>Start
|
||
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_105"
|
||
o:spid="_x0000_i1027" type="#_x0000_t75" style='width:480pt;height:276.75pt;
|
||
visibility:visible;mso-wrap-style:square'>
|
||
<v:imagedata src="/WebGoat/lesson_solutions/HiddenFieldTampering_files/image005.png" o:title=""/>
|
||
</v:shape><![endif]--><![if !vml]><img width=640 height=369
|
||
src="/WebGoat/lesson_solutions/HiddenFieldTampering_files/image013.jpg" v:shapes="Picture_x0020_105"><![endif]></span><span
|
||
style='font-family:"Arial","sans-serif"'><o:p></o:p></span></p>
|
||
|
||
<p class=MsoCaption><span style='font-family:"Arial","sans-serif"'>Figure </span><!--[if supportFields]><span
|
||
style='font-family:"Arial","sans-serif"'><span style='mso-element:field-begin'></span><span
|
||
style='mso-spacerun:yes'><3E></span>SEQ Figure \* ARABIC <span style='mso-element:
|
||
field-separator'></span></span><![endif]--><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-no-proof:yes'>3</span></span><!--[if supportFields]><span
|
||
style='font-family:"Arial","sans-serif"'><span style='mso-element:field-end'></span></span><![endif]--><span
|
||
style='font-family:"Arial","sans-serif"'> Intercept request with WebScarab<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal style='page-break-after:avoid'><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_106"
|
||
o:spid="_x0000_i1026" type="#_x0000_t75" style='width:480pt;height:276.75pt;
|
||
visibility:visible;mso-wrap-style:square'>
|
||
<v:imagedata src="/WebGoat/lesson_solutions/HiddenFieldTampering_files/image007.png" o:title=""/>
|
||
</v:shape><![endif]--><![if !vml]><img width=640 height=369
|
||
src="/WebGoat/lesson_solutions/HiddenFieldTampering_files/image014.jpg" v:shapes="Picture_x0020_106"><![endif]></span><span
|
||
style='font-family:"Arial","sans-serif"'><o:p></o:p></span></p>
|
||
|
||
<p class=MsoCaption><span style='font-family:"Arial","sans-serif"'>Figure </span><!--[if supportFields]><span
|
||
style='font-family:"Arial","sans-serif"'><span style='mso-element:field-begin'></span><span
|
||
style='mso-spacerun:yes'><3E></span>SEQ Figure \* ARABIC <span style='mso-element:
|
||
field-separator'></span></span><![endif]--><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-no-proof:yes'>4</span></span><!--[if supportFields]><span
|
||
style='font-family:"Arial","sans-serif"'><span style='mso-element:field-end'></span></span><![endif]--><span
|
||
style='font-family:"Arial","sans-serif"'> Change the Price variable to 1<o:p></o:p></span></p>
|
||
|
||
<p class=MsoCaption><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_107"
|
||
o:spid="_x0000_i1025" type="#_x0000_t75" style='width:480pt;height:276.75pt;
|
||
visibility:visible;mso-wrap-style:square'>
|
||
<v:imagedata src="/WebGoat/lesson_solutions/HiddenFieldTampering_files/image009.png" o:title=""/>
|
||
</v:shape><![endif]--><![if !vml]><img width=640 height=369
|
||
src="/WebGoat/lesson_solutions/HiddenFieldTampering_files/image015.jpg" v:shapes="Picture_x0020_107"><![endif]></span><span
|
||
style='font-family:"Arial","sans-serif"'><o:p></o:p></span></p>
|
||
|
||
<p class=MsoCaption><span style='font-family:"Arial","sans-serif"'>Figure </span><!--[if supportFields]><span
|
||
style='font-family:"Arial","sans-serif"'><span style='mso-element:field-begin'></span><span
|
||
style='mso-spacerun:yes'><3E></span>SEQ Figure \* ARABIC <span style='mso-element:
|
||
field-separator'></span></span><![endif]--><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-no-proof:yes'>5</span></span><!--[if supportFields]><span
|
||
style='font-family:"Arial","sans-serif"'><span style='mso-element:field-end'></span></span><![endif]--><span
|
||
style='font-family:"Arial","sans-serif"'> Lesson 4 Completed<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><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>
|