WebGoat/main/project/WebContent/lesson_solutions/SqlStringInjection.html
2008-11-21 16:57:23 +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 String SQL 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>
<!-- Start Instructions -->
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>SQL injection
attacks represent a serious threat to any database-driven site. The methods
behind an attack are easy to learn and the damage caused can range from
considerable to complete system compromise. Despite these risks, an incredible
number of systems on the internet are susceptible to this form of attack. <br>
<br>
Not only is it a threat easily instigated, it is also a threat that, with a
little common-sense and forethought, can easily be prevented.<br>
<br>
It is always good practice to sanitize all input data, especially data that
will used in OS command, scripts, and database queries, even if the threat of
SQL injection has been prevented in some other manner.<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"'>The form
below allows a user to view their credit card numbers. Try to inject an SQL
string that results in all the credit card numbers being displayed. Try the
user name of 'Smith'.<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 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>&nbsp;</o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Compared with
the previous lesson, there is now a string parameter and not an integer.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Strings must be
terminated with single quotes to have a valid SQL Query.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><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'>1</span><!--[if supportFields]><span style='mso-element:
field-end'></span><![endif]--> Lesson 18<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>&nbsp;</o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>The query
used in this lesson is: SELECT * FROM user_data WHERE last_name = 'Your Name'<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><span style='font-family:"Arial","sans-serif"'>Enter for the
last name value: Erwin' OR '1'='1 <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><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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style='mso-no-proof:yes'>2</span><!--[if supportFields]><span style='mso-element:
field-end'></span><![endif]--> Lesson 18 Completed<span style='font-family:
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<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p>&nbsp;</o:p></span></p>
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<p class=MsoNormal><o:p>&nbsp;</o:p></p>
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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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