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
CommandInjection_files
DOMInjection_files
DOS_Login_files
FailOpenAuthentication_files
ForcedBrowsing_files
ForgotPassword_files
HiddenFieldTampering_files
HtmlClues_files
HttpBasics_files
HttpOnly_files
HttpSplitting_files
JSONInjection_files
JavaScriptValidation_files
LogSpoofing_files
PathBasedAccessControl_files
ReflectedXSS_files
RemoteAdminFlaw_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
CommandInjection.html
DOMInjection.html
DOS_Login.html
FailOpenAuthentication.html
ForcedBrowsing.html
ForgotPassword.html
HiddenFieldTampering.html
HtmlClues.html
HttpBasics.html
HttpOnly.html
HttpSplitting.html
JSONInjection.html
JavaScriptValidation.html
LogSpoofing.html
PathBasedAccessControl.html
ReflectedXSS.html
RemoteAdminFlaw.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
lessons
users
main.jsp
sideWindow.jsp
webgoat.jsp
webgoat_challenge.jsp
doc
build.xml
HOW TO create the WebGoat workspace.txt
WAR Installation Instructions.txt
build.xml
eclipse.bat
readme.txt
webgoat.bat
webgoat.sh
webgoat_8080.bat
webscarab.bat
Modified Lesson banners Solutions guide and framework git-svn-id: http://webgoat.googlecode.com/svn/trunk@213 4033779f-a91e-0410-96ef-6bf7bf53c507
933 lines
43 KiB
HTML
933 lines
43 KiB
HTML
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<meta name=Originator content="Microsoft Word 12">
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<o:Created>2007-07-11T15:30:00Z</o:Created>
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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
|
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Perform Silent Transactions Attacks. <o:p></o:p></span></p>
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|
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|
||
teaches how to perform silent transactions attacks. <o:p></o:p></span></p>
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attacks works:</span></b><span style='font-family:"Arial","sans-serif"'> <o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Any system that
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||
silently processes transactions using a single submission is dangerous to the
|
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client. For example, if a normal web application allows a simple URL
|
||
submission, a preset session attack will allow the attacker to complete a
|
||
transaction without the user<65>s authorization. In Ajax, it gets worse: the
|
||
transaction is silent; it happens with no user feedback on the page, so an
|
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injected attack script may be able to steal money from the client without
|
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authorization.<o:p></o:p></span></p>
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|
||
Goal(s):</span></b><span style='font-family:"Arial","sans-serif"'> <o:p></o:p></span></p>
|
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|
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sample internet banking application - money transfer page.<o:p></o:p></span></p>
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|
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|
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below your balance, the account you are transferring to and amount you will
|
||
transfer.<br>
|
||
The application uses AJAX to submit the transaction after doing some basic
|
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client side validations.<br>
|
||
Your goal is to try to bypass the user's authorization and silently execute the
|
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transaction.<br style='mso-special-character:line-break'>
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|
||
|
||
<p class=MsoCaption>Figure <!--[if supportFields]><span style='mso-element:
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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'>1</span><!--[if supportFields]><span style='mso-element:
|
||
field-end'></span><![endif]--> AJAX Security - Silent transaction attacks</p>
|
||
|
||
<p class=MsoNormal><o:p> </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"'>This web
|
||
application uses JavaScript on the client to initiate a transaction for
|
||
transferring money. Examining the HTML source reveals that two JavaScript
|
||
functions are being used:<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"'><script><o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>function
|
||
processData(){<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD></span>var accountNo =
|
||
document.getElementById('newAccount').value;<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD></span>var amount =
|
||
document.getElementById('amount').value;<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD></span>if ( accountNo == ''){<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD></span>alert('Please enter a valid account number to
|
||
transfer to.')<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD></span>return;<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"'><span
|
||
style='mso-spacerun:yes'><EFBFBD></span>else if ( amount == ''){<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD></span>alert('Please enter a valid amount to
|
||
transfer.')<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD></span>return;<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"'><span
|
||
style='mso-spacerun:yes'><EFBFBD></span>var balanceValue =
|
||
document.getElementById('balanceID').innerText;<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD></span>balanceValue = balanceValue.replace( new
|
||
RegExp('$') , '');<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD></span>if ( parseFloat(amount) >
|
||
parseFloat(balanceValue) ) {<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD></span>alert('You can not transfer more funds than
|
||
what is available in your balance.')<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD></span>return;<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>}<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD></span>document.getElementById('confirm').value<span
|
||
style='mso-spacerun:yes'><EFBFBD> </span>= 'Transferring'<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>submitData(accountNo,
|
||
amount);<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD></span>document.getElementById('confirm').value<span
|
||
style='mso-spacerun:yes'><EFBFBD> </span>= 'Confirm'<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>balanceValue
|
||
= parseFloat(balanceValue) - parseFloat(amount);<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>balanceValue
|
||
= balanceValue.toFixed(2);<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>document.getElementById('balanceID').innerText
|
||
= balanceValue + '$';<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"'>function
|
||
submitData(accountNo, balance) {<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>var url =
|
||
'/WebGoat/attack?Screen=74&menu=1150&from=ajax&newAccount='+
|
||
accountNo+ '&amount=' + balance +'&confirm=' +
|
||
document.getElementById('confirm').value; <o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>if (typeof
|
||
XMLHttpRequest != 'undefined') {<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>req = new
|
||
XMLHttpRequest();<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>} else if
|
||
(window.ActiveXObject) {<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>req = new
|
||
ActiveXObject('Microsoft.XMLHTTP');<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD><EFBFBD> </span>}<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD><EFBFBD> </span>req.open('GET', url, true);<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD><EFBFBD> </span>req.onreadystatechange = callback;<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD><EFBFBD> </span>req.send(null);<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"'>function
|
||
callback() {<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD><EFBFBD><EFBFBD> </span>if (req.readyState == 4) { <o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> </span>if (req.status == 200) { <o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> </span>var result =<span
|
||
style='mso-spacerun:yes'><EFBFBD> </span>req.responseText ;<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-tab-count:3'><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> </span><span
|
||
style='mso-spacerun:yes'><EFBFBD></span></span><span lang=NL-BE style='font-family:
|
||
"Arial","sans-serif";mso-ansi-language:NL-BE'>var resultsDiv =
|
||
document.getElementById('resultsDiv');<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span lang=NL-BE style='font-family:"Arial","sans-serif";
|
||
mso-ansi-language:NL-BE'><span style='mso-tab-count:4'><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> </span></span><span
|
||
style='font-family:"Arial","sans-serif"'>resultsDiv.innerHTML = '';<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-tab-count:4'><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> </span>resultsDiv.innerHTML
|
||
= result;<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><span
|
||
style='mso-spacerun:yes'><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> </span>}}}<o:p></o:p></span></p>
|
||
|
||
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'></script><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 function
|
||
processData() is called when the user fills out an account number and an amount
|
||
to transfer. The function processData() will check if the user has sufficient
|
||
balance before initiating the transaction. After validation of the balance, the
|
||
JavaScript function submitData(accountNo, balance) is called which actually
|
||
submits the required information, target account number and the amount to
|
||
transfer, to the back-end web application.<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"'>If you are
|
||
able to call this JavaScript function submitData(accountNo, balance) from the
|
||
browser, you are able to bypass the client-side validation and execute this
|
||
transaction silently, without an additional approval or digital signature of
|
||
the user.<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 latest
|
||
generation of browsers allows to call JavaScript from the address bar, using
|
||
javascript:function();. Try to execute: javascript:submitData(1234556,11000);<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_90"
|
||
o:spid="_x0000_i1027" type="#_x0000_t75" style='width:480pt;height:277.5pt;
|
||
visibility:visible;mso-wrap-style:square'>
|
||
<v:imagedata src="/WebGoat/lesson_solutions/SilentTransactions_files/image003.png" o:title=""/>
|
||
</v:shape><![endif]--><![if !vml]><img width=640 height=370
|
||
src="/WebGoat/lesson_solutions/SilentTransactions_files/image010.jpg" v:shapes="Picture_x0020_90"><![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'>2</span><!--[if supportFields]><span style='mso-element:
|
||
field-end'></span><![endif]--> Follow the hints....</p>
|
||
|
||
<p class=MsoNormal><o:p> </o:p></p>
|
||
|
||
<p class=MsoNormal style='page-break-after:avoid'><span style='mso-no-proof:
|
||
yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_91" o:spid="_x0000_i1026"
|
||
type="#_x0000_t75" style='width:481.5pt;height:345pt;visibility:visible;
|
||
mso-wrap-style:square'>
|
||
<v:imagedata src="/WebGoat/lesson_solutions/SilentTransactions_files/image005.png" o:title=""/>
|
||
</v:shape><![endif]--><![if !vml]><img width=642 height=460
|
||
src="/WebGoat/lesson_solutions/SilentTransactions_files/image011.jpg" v:shapes="Picture_x0020_91"><![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]--> HTTP Request generated from Javascript function
|
||
submitData(123456,110000);</p>
|
||
|
||
<p class=MsoNormal><o:p> </o:p></p>
|
||
|
||
<p class=MsoNormal><o:p> </o:p></p>
|
||
|
||
<p class=MsoNormal style='page-break-after:avoid'><span style='mso-no-proof:
|
||
yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_92" 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/SilentTransactions_files/image007.png" o:title=""/>
|
||
</v:shape><![endif]--><![if !vml]><img width=640 height=370
|
||
src="/WebGoat/lesson_solutions/SilentTransactions_files/image012.jpg" v:shapes="Picture_x0020_92"><![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 completed</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>
|