WebGoat/webapp/lesson_solutions/ForcedBrowsing.html

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<div class=Section1>
<p class=MsoNormal style='text-align:justify'><b><span style='font-family:"Arial","sans-serif"'>Lesson
Plan Title:</span></b><span style='font-family:"Arial","sans-serif"'> How to
Perform Forced Browsing Attacks. <o:p></o:p></span></p>
<p class=MsoNormal style='text-align:justify'><span style='font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></p>
<p class=MsoNormal style='text-align:justify'><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 style='text-align:justify'><span style='font-family:"Arial","sans-serif"'>How
to Exploit Forced Browsing. <o:p></o:p></span></p>
<p class=MsoNormal style='text-align:justify'><b><span style='font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></b></p>
<p class=MsoNormal style='text-align:justify'><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 style='text-align:justify'><span style='font-family:"Arial","sans-serif"'>Forced
browsing is a technique used by attackers to gain access to resources that are
not referenced, but are nevertheless accessible. One technique is to manipulate
the URL in the browser by deleting sections from the end until an unprotected
directory is found <o:p></o:p></span></p>
<p class=MsoNormal style='text-align:justify'><b><span style='font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></b></p>
<p class=MsoNormal style='text-align:justify'><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
goal should be to try to guess the URL for the &quot;config&quot; interface.<br>
The &quot;config&quot; URL is only available to the maintenance personnel.<br>
The application doesn't check for horizontal privileges.</span><span
style='font-family:"Arial","sans-serif";mso-fareast-language:JA'><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='text-align:justify;page-break-after:avoid'><span
style='font-family:"Arial","sans-serif";mso-no-proof:yes'><!--[if gte vml 1]><v:shapetype
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<v:formulas>
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<v:f eqn="sum @0 1 0"/>
<v:f eqn="sum 0 0 @1"/>
<v:f eqn="prod @2 1 2"/>
<v:f eqn="prod @3 21600 pixelWidth"/>
<v:f eqn="prod @3 21600 pixelHeight"/>
<v:f eqn="sum @0 0 1"/>
<v:f eqn="prod @6 1 2"/>
<v:f eqn="prod @7 21600 pixelWidth"/>
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<v:f eqn="prod @7 21600 pixelHeight"/>
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</v:shape><![endif]--><![if !vml]><img width=640 height=370
src="lesson_solutions/ForcedBrowsing_files/image002.jpg" v:shapes="Picture_x0020_97"><![endif]></span></p>
<p class=MsoCaption style='text-align:justify'>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]--> Insecure configuration
management <20> Forced Browsing</p>
<p class=MsoNormal style='text-align:justify'><o:p>&nbsp;</o:p></p>
<p class=MsoNormal style='text-align:justify'><b><span style='font-family:"Arial","sans-serif"'>Solution:<o:p></o:p></span></b></p>
<p class=MsoNormal style='text-align:justify'><span style='font-family:"Arial","sans-serif";
mso-bidi-font-weight:bold'>If you want to access a restricted page, you need to
be able to guess the URI to access the page, for example /admin.<o:p></o:p></span></p>
<p class=MsoNormal style='text-align:justify'><span style='font-family:"Arial","sans-serif";
mso-bidi-font-weight:bold'>In this environment, WebGoat consists of different
servlets that live in the WebGoat application. The main servlet is /attack,
what could be the servlet for config?<o:p></o:p></span></p>
<p class=MsoNormal style='text-align:justify'><span style='font-family:"Arial","sans-serif";
mso-bidi-font-weight:bold'><o:p>&nbsp;</o:p></span></p>
<p class=MsoNormal style='text-align:justify'><span style='font-family:"Arial","sans-serif";
mso-bidi-font-weight:bold'>Try to access config,
configuration, conf, <20>.<o:p></o:p></span></p>
<p class=MsoNormal style='text-align:justify'><span style='font-family:"Arial","sans-serif";
mso-bidi-font-weight:bold'><o:p>&nbsp;</o:p></span></p>
<p class=MsoNormal style='text-align:justify;page-break-after:avoid'><b
style='mso-bidi-font-weight:normal'><span style='font-family:"Arial","sans-serif";
mso-no-proof:yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_98" o:spid="_x0000_i1027"
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<v:imagedata src="lesson_solutions/ForcedBrowsing_files/image003.png" o:title=""/>
</v:shape><![endif]--><![if !vml]><img width=640 height=370
src="lesson_solutions/ForcedBrowsing_files/image004.jpg" v:shapes="Picture_x0020_98"><![endif]></span></b></p>
<p class=MsoCaption style='text-align:justify'>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]--> No config</p>
<p class=MsoNormal style='text-align:justify'><o:p>&nbsp;</o:p></p>
<p class=MsoNormal style='text-align:justify;page-break-after:avoid'><span
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<v:imagedata src="lesson_solutions/ForcedBrowsing_files/image005.png" o:title=""/>
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src="lesson_solutions/ForcedBrowsing_files/image006.jpg" v:shapes="Picture_x0020_99"><![endif]></span></p>
<p class=MsoCaption style='text-align:justify'>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]--> No configuration</p>
<p class=MsoNormal style='text-align:justify'><o:p>&nbsp;</o:p></p>
<p class=MsoNormal style='text-align:justify;page-break-after:avoid'><span
style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_100"
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visibility:visible;mso-wrap-style:square'>
<v:imagedata src="lesson_solutions/ForcedBrowsing_files/image007.png" o:title=""/>
</v:shape><![endif]--><![if !vml]><img width=640 height=370
src="lesson_solutions/ForcedBrowsing_files/image008.jpg" v:shapes="Picture_x0020_100"><![endif]></span></p>
<p class=MsoCaption style='text-align:justify'>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]--> Bingo for conf</p>
<p class=MsoNormal style='text-align:justify'><o:p>&nbsp;</o:p></p>
<p class=MsoNormal style='text-align:justify'><span style='font-family:"Arial","sans-serif"'>This
could be automated with a tool like Wikto 2.0<o:p></o:p></span></p>
<p class=MsoNormal style='text-align:justify'><o:p>&nbsp;</o:p></p>
</div>
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<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>
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