webgoat
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_files
MultiLevelLogin2_files
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
InsecureLogin.html
JSONInjection.html
JavaScriptValidation.html
LogSpoofing.html
MultiLevelLogin1.html
MultiLevelLogin2.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
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
742 lines
34 KiB
HTML
742 lines
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|
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style='font-family:"Arial","sans-serif"'> How to Bypass a Fail Open
|
||
Authentication Scheme<o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>This lesson presents
|
||
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|
||
authentication. The security term, "fail open" describes a behavior of a
|
||
verification mechanism. This is when an error (i.e. unexpected exception)
|
||
occurs during a verification method causing that method to evaluate to true.
|
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This is especially dangerous during login. <o:p></o:p></span></p>
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|
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|
||
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|
||
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|
||
style='mso-no-proof:yes'>1</span><!--[if supportFields]><span style='mso-element:
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|
||
|
||
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|
||
|
||
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|
||
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|
||
|
||
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|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Enter user
|
||
name webgoat and click "Login". Intercept the request with WebScarab.<o:p></o:p></span></p>
|
||
|
||
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|
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|
||
|
||
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|
||
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]--> Intercepted request<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><span style='font-family:"Arial","sans-serif"'>Click on the
|
||
variable "Password" and click "Delete". Click "Accept changes".<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_8"
|
||
o:spid="_x0000_i1026" type="#_x0000_t75" style='width:459.75pt;height:362.25pt;
|
||
visibility:visible;mso-wrap-style:square'>
|
||
<v:imagedata src="/WebGoat/lesson_solutions/FailOpenAuthentication_files/image005.png" o:title=""/>
|
||
</v:shape><![endif]--><![if !vml]><img width=613 height=483
|
||
src="/WebGoat/lesson_solutions/FailOpenAuthentication_files/image011.jpg" v:shapes="Picture_x0020_8"><![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]--> Password variable is deleted</p>
|
||
|
||
<p class=MsoNormal><o:p> </o:p></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>You are now
|
||
"authenticated" as WebGoat.<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_4"
|
||
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/FailOpenAuthentication_files/image007.png" o:title=""/>
|
||
</v:shape><![endif]--><![if !vml]><img width=640 height=370
|
||
src="/WebGoat/lesson_solutions/FailOpenAuthentication_files/image012.jpg" v:shapes="Picture_x0020_4"><![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]--> Lesson 19 Completed<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><span style='font-family:"Arial","sans-serif"'>The problem
|
||
is that the exception handler in the Java code is executing a catch block for successful
|
||
authentication. The exception occurs because there is a NullPointer exception
|
||
when reading out the password parameter.<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>
|